[PATCH v6 0/8] media: qcom: camss: Introduce support for named power-domains

[PATCH v6 0/8] media: qcom: camss: Introduce support for named power-domains

[Bryan O'Donoghue]

Changes in v6:

- Kernel test robot sparse spalt fix - kernel robot

- Imports an additional patch to switch on named pds for sm8250
  I debated including this with myself and didn't opt for it.
  Happy to pull it in based on feedback though - Konrad

- Changes code in patch #4 newlines, returns.
  Christmas tree's per suggestion barring placing ret last - Konrad

- Moves switching off of TITAN gdsc to last.
  This is how it "ought" to happen logically it is simply happenstance that
  TOP is the parent of the VFE gdscs that the ordering of the switching off
  is irrelevant but, the code should really make the call per our
  conceptual expectations - bod, Konrad

Link: https://lore.kernel.org/r/20231118-b4-camss-named-power-domains-v5-0-55eb0f35a30a@linaro.org
Link: https://git.codelinaro.org/bryan.odonoghue/kernel/-/tree/b4/b4-camss-named-power-domains-v6
Link: https://git.codelinaro.org/bryan.odonoghue/kernel/-/tree/b4/b4-camss-named-power-domains-v6+sm8250

V5:
- Adds Konrad's RB -> b4 trailers --update
- Amends comment and control flow disjunction for readability - Konrad

- Link to v4: https://lore.kernel.org/r/20231103-b4-camss-named-power-domains-v4-0-33a905359dbc@linaro.org
Link:
https://git.codelinaro.org/bryan.odonoghue/kernel/-/tree/b4/b4-camss-named-power-domains-v5
sm8250-testable: https://git.codelinaro.org/bryan.odonoghue/kernel/-/tree/b4/b4-camss-named-power-domains-v5+sm8250

V4:
- Updates camss_configure_pd() to use has_pd to determine if
  a VFE has a pd instead of comparing to vfe_num
- Brings in is_lite fixes from Matti
  The determination of IS_LITE() has been a running sore in this code for
  some time.

  Named power domains remove magic index dependencies.
  Similarly adding an "is_lite" flag to our resources removes the last
  of the magic indexing sins, so this is an opportune series to add it in.

Link: https://git.codelinaro.org/bryan.odonoghue/kernel/-/tree/b4/b4-camss-named-power-domains-v4
sm8250-testable: https://git.codelinaro.org/bryan.odonoghue/kernel/-/tree/b4/b4-camss-named-power-domains-v4+sm8250
Link: https://lore.kernel.org/r/20231101-b4-camss-named-power-domains-v3-0-bbdf5f22462a@linaro.org

V3:
- Includes bugfix reported on IRC
  genpd_link and genpd should be checked for NULL on the cleanup path.
  Matti Lehtimäki 
- Retains NULL check before dev_pm_domain_attach_by_name()
  I experimented with the suggested drop but of_property_match_string()
  chokes
  Link: https://lore.kernel.org/lkml/883ce8a7-80e1-4065-a957-424d0b4a6535@linaro.org/T/#m10e5a43d0245f13eca177ef2f65b24259c641030
  Konrad
- Fixes spelling caught by codespell - Konrad

Link: https://git.codelinaro.org/bryan.odonoghue/kernel/-/tree/b4/b4-camss-named-power-domains-v3
sm8250-testable: https://git.codelinaro.org/bryan.odonoghue/kernel/-/tree/b4/b4-camss-named-power-domains-v3+sm8250

V2:
- Incorporates Konrad's suggestion re: removing 'id'
- Adds RB - Konrad
- Adds in a flag to indicate if a VFE has a power domain.
  As I rebased this series I realised we had some magic indexing for VFE v
  VFE Lite, which isn't the root cause of my bug bear in this series but is
  the same sin - inferring functionality from indexing.
  Once we transition fully to named pds we won't need a 'has_pd' to flag
  which VFEs need power-domain attachment and which don't.
  That transition will require populating all upstream dtsi with pd-names
  and then deprecating the old way.
  has_pd is a far better choice than inferring from indexes so, I've added.

Link: https://git.codelinaro.org/bryan.odonoghue/kernel/-/commits/aa45a2b58aa1e187a2698a65164d694251f08fa1

V1:
At the moment the Qcom CAMSS driver relies on the declaration order of
power-domains within the dtsi to determine which power-domain relates to a
VFE and which power-domain relates to the top-level (top) CAMSS
power-domain.

VFE power-domains must be declared prior to the top power-domain. The top
power-domain must be declared last. Early SoCs have just one top
power-domain with later SoCs introducing VFE specific power-domains.

Differentiating between the number of power-domains results in lots of code
which is brittle and which we can mostly get rid of with named
power-domains.

The reliance on declaration ordering is in-effect magic number indexing.

This series introduces named power-domains for CAMSS and refactors some of
the code in CAMSS to support the new named power-domains. We continue to
support the legacy indexing model with an intention to remove after a
reasonable transition period.

New SoC additions should use named power-domains from now on.

Tested on x13s, rb5, db410c

Link: https://git.codelinaro.org/bryan.odonoghue/kernel/-/tree/linux-next-23-10-23-camss-named-power-domains

Bryan O'Donoghue (5):
  media: qcom: camss: Flag which VFEs require a power-domain
  media: qcom: camss: Convert to per-VFE pointer for power-domain
    linkages
  media: qcom: camss: Use common VFE pm_domain_on/pm_domain_off where
    applicable
  media: qcom: camss: Move VFE power-domain specifics into vfe.c
  media: qcom: camss: Add support for named power-domains

 .../media/platform/qcom/camss/camss-vfe-170.c | 36 --------
 .../media/platform/qcom/camss/camss-vfe-4-1.c |  8 +-
 .../media/platform/qcom/camss/camss-vfe-4-7.c | 36 --------
 .../media/platform/qcom/camss/camss-vfe-4-8.c | 31 -------
 .../media/platform/qcom/camss/camss-vfe-480.c | 36 --------
 drivers/media/platform/qcom/camss/camss-vfe.c | 77 ++++++++++++++++
 drivers/media/platform/qcom/camss/camss-vfe.h | 16 ++++
 drivers/media/platform/qcom/camss/camss.c     | 87 ++++++++++++-------
 drivers/media/platform/qcom/camss/camss.h     |  7 +-
 9 files changed, 156 insertions(+), 178 deletions(-)

--
2.42.0

---
---
Bryan O'Donoghue (6):
      media: qcom: camss: Flag which VFEs require a power-domain
      media: qcom: camss: Convert to per-VFE pointer for power-domain linkages
      media: qcom: camss: Use common VFE pm_domain_on/pm_domain_off where applicable
      media: qcom: camss: Move VFE power-domain specifics into vfe.c
      media: qcom: camss: Add support for named power-domains
      media: qcom: camss: Add sm8250 named power-domain support

Matti Lehtimäki (2):
      media: qcom: camss: Flag VFE-lites to support more VFEs
      media: qcom: camss: Flag CSID-lites to support more CSIDs

 .../media/platform/qcom/camss/camss-csid-gen2.c    |  31 +++---
 drivers/media/platform/qcom/camss/camss-csid.c     |   5 +
 drivers/media/platform/qcom/camss/camss-csid.h     |   7 ++
 drivers/media/platform/qcom/camss/camss-vfe-170.c  |  36 -------
 drivers/media/platform/qcom/camss/camss-vfe-4-1.c  |   8 +-
 drivers/media/platform/qcom/camss/camss-vfe-4-7.c  |  36 -------
 drivers/media/platform/qcom/camss/camss-vfe-4-8.c  |  31 ------
 drivers/media/platform/qcom/camss/camss-vfe-480.c  |  69 +++---------
 drivers/media/platform/qcom/camss/camss-vfe.c      |  81 ++++++++++++++
 drivers/media/platform/qcom/camss/camss-vfe.h      |  26 +++++
 drivers/media/platform/qcom/camss/camss.c          | 119 +++++++++++++--------
 drivers/media/platform/qcom/camss/camss.h          |  10 +-
 12 files changed, 236 insertions(+), 223 deletions(-)
---
base-commit: 48016737a9af47328dd321df4dd3479ed5e2041d
change-id: 20231031-b4-camss-named-power-domains-cc2ac2722543

Best regards,
-- 
Bryan O'Donoghue <bryan.odonoghue@linaro.org>

[PATCH v6 1/8] media: qcom: camss: Flag which VFEs require a power-domain

[Bryan O'Donoghue]

At the moment we have some complex code for determining if a VFE requires a
power-domain attachment. Particularly discordant in this scheme is the
subtle reliance on VFE and VFE Lite declaration ordering in our resources.

VFE id is used to determine if a VFE is lite or not and consequently if a
VFE requires power-domain attachment. VFE Lite though is not a correct
delineation between power-domain and non power-domain state since early
SoCs have neither VFE Lite nor power-domains attached to VFEs.

Introduce has_pd to the VFE resource structure to allow the CAMSS code to
understand if it needs to try to attach a power-domain for a given VFE.

As a side-effect from this we no longer need to care about VFE Lite or
non-Lite or the id number associated with either and which order the
VFE/VFE Lite was declared in.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Tested-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 drivers/media/platform/qcom/camss/camss.c | 8 ++++++++
 drivers/media/platform/qcom/camss/camss.h | 1 +
 2 files changed, 9 insertions(+)

diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
index 8e78dd8d5961e..ed01a3ac7a38e 100644
--- a/drivers/media/platform/qcom/camss/camss.c
+++ b/drivers/media/platform/qcom/camss/camss.c
@@ -278,6 +278,7 @@ static const struct camss_subdev_resources vfe_res_8x96[] = {
 		.reg = { "vfe0" },
 		.interrupt = { "vfe0" },
 		.line_num = 3,
+		.has_pd = true,
 		.ops = &vfe_ops_4_7
 	},
 
@@ -298,6 +299,7 @@ static const struct camss_subdev_resources vfe_res_8x96[] = {
 		.reg = { "vfe1" },
 		.interrupt = { "vfe1" },
 		.line_num = 3,
+		.has_pd = true,
 		.ops = &vfe_ops_4_7
 	}
 };
@@ -468,6 +470,7 @@ static const struct camss_subdev_resources vfe_res_660[] = {
 		.reg = { "vfe0" },
 		.interrupt = { "vfe0" },
 		.line_num = 3,
+		.has_pd = true,
 		.ops = &vfe_ops_4_8
 	},
 
@@ -491,6 +494,7 @@ static const struct camss_subdev_resources vfe_res_660[] = {
 		.reg = { "vfe1" },
 		.interrupt = { "vfe1" },
 		.line_num = 3,
+		.has_pd = true,
 		.ops = &vfe_ops_4_8
 	}
 };
@@ -658,6 +662,7 @@ static const struct camss_subdev_resources vfe_res_845[] = {
 		.reg = { "vfe0" },
 		.interrupt = { "vfe0" },
 		.line_num = 4,
+		.has_pd = true,
 		.ops = &vfe_ops_170
 	},
 
@@ -680,6 +685,7 @@ static const struct camss_subdev_resources vfe_res_845[] = {
 		.reg = { "vfe1" },
 		.interrupt = { "vfe1" },
 		.line_num = 4,
+		.has_pd = true,
 		.ops = &vfe_ops_170
 	},
 
@@ -840,6 +846,7 @@ static const struct camss_subdev_resources vfe_res_8250[] = {
 		.reg = { "vfe0" },
 		.interrupt = { "vfe0" },
 		.line_num = 3,
+		.has_pd = true,
 		.ops = &vfe_ops_480
 	},
 	/* VFE1 */
@@ -860,6 +867,7 @@ static const struct camss_subdev_resources vfe_res_8250[] = {
 		.reg = { "vfe1" },
 		.interrupt = { "vfe1" },
 		.line_num = 3,
+		.has_pd = true,
 		.ops = &vfe_ops_480
 	},
 	/* VFE2 (lite) */
diff --git a/drivers/media/platform/qcom/camss/camss.h b/drivers/media/platform/qcom/camss/camss.h
index 8acad7321c09d..b854cff1774d4 100644
--- a/drivers/media/platform/qcom/camss/camss.h
+++ b/drivers/media/platform/qcom/camss/camss.h
@@ -49,6 +49,7 @@ struct camss_subdev_resources {
 	char *reg[CAMSS_RES_MAX];
 	char *interrupt[CAMSS_RES_MAX];
 	u8 line_num;
+	bool has_pd;
 	const void *ops;
 };
 

-- 
2.42.0

[PATCH v6 2/8] media: qcom: camss: Convert to per-VFE pointer for power-domain linkages

[Bryan O'Donoghue]

Right now we use the top-level camss structure to provide pointers via
VFE id index back to genpd linkages.

In effect this hard-codes VFE indexes to power-domain indexes in the
dtsi and mandates a very particular ordering of power domains in the
dtsi, which bears no relationship to a real hardware dependency.

As a first step to rationalising the VFE power-domain code and breaking
the magic indexing in dtsi use per-VFE pointers to genpd linkages.

The top-level index in msm_vfe_subdev_init is still used to attain the
initial so no functional or logical change arises from this change.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Tested-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 drivers/media/platform/qcom/camss/camss-vfe-170.c | 15 +++++++--------
 drivers/media/platform/qcom/camss/camss-vfe-4-7.c | 15 +++++----------
 drivers/media/platform/qcom/camss/camss-vfe-4-8.c | 13 +++++--------
 drivers/media/platform/qcom/camss/camss-vfe-480.c | 15 +++++++--------
 drivers/media/platform/qcom/camss/camss-vfe.c     |  3 +++
 drivers/media/platform/qcom/camss/camss-vfe.h     |  2 ++
 6 files changed, 29 insertions(+), 34 deletions(-)

diff --git a/drivers/media/platform/qcom/camss/camss-vfe-170.c b/drivers/media/platform/qcom/camss/camss-vfe-170.c
index 0b211fed12760..7451484317cc3 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-170.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-170.c
@@ -638,7 +638,7 @@ static void vfe_pm_domain_off(struct vfe_device *vfe)
 	if (vfe->id >= camss->res->vfe_num)
 		return;
 
-	device_link_del(camss->genpd_link[vfe->id]);
+	device_link_del(vfe->genpd_link);
 }
 
 /*
@@ -648,16 +648,15 @@ static void vfe_pm_domain_off(struct vfe_device *vfe)
 static int vfe_pm_domain_on(struct vfe_device *vfe)
 {
 	struct camss *camss = vfe->camss;
-	enum vfe_line_id id = vfe->id;
 
-	if (id >= camss->res->vfe_num)
+	if (vfe->id >= camss->res->vfe_num)
 		return 0;
 
-	camss->genpd_link[id] = device_link_add(camss->dev, camss->genpd[id],
-						DL_FLAG_STATELESS |
-						DL_FLAG_PM_RUNTIME |
-						DL_FLAG_RPM_ACTIVE);
-	if (!camss->genpd_link[id])
+	vfe->genpd_link = device_link_add(camss->dev, vfe->genpd,
+					  DL_FLAG_STATELESS |
+					  DL_FLAG_PM_RUNTIME |
+					  DL_FLAG_RPM_ACTIVE);
+	if (!vfe->genpd_link)
 		return -EINVAL;
 
 	return 0;
diff --git a/drivers/media/platform/qcom/camss/camss-vfe-4-7.c b/drivers/media/platform/qcom/camss/camss-vfe-4-7.c
index b65ed0fef595e..2b4e7e039407b 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-4-7.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-4-7.c
@@ -1109,14 +1109,10 @@ static void vfe_isr_read(struct vfe_device *vfe, u32 *value0, u32 *value1)
  */
 static void vfe_pm_domain_off(struct vfe_device *vfe)
 {
-	struct camss *camss;
-
 	if (!vfe)
 		return;
 
-	camss = vfe->camss;
-
-	device_link_del(camss->genpd_link[vfe->id]);
+	device_link_del(vfe->genpd_link);
 }
 
 /*
@@ -1126,13 +1122,12 @@ static void vfe_pm_domain_off(struct vfe_device *vfe)
 static int vfe_pm_domain_on(struct vfe_device *vfe)
 {
 	struct camss *camss = vfe->camss;
-	enum vfe_line_id id = vfe->id;
 
-	camss->genpd_link[id] = device_link_add(camss->dev, camss->genpd[id], DL_FLAG_STATELESS |
-						DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE);
+	vfe->genpd_link = device_link_add(camss->dev, vfe->genpd, DL_FLAG_STATELESS |
+					  DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE);
 
-	if (!camss->genpd_link[id]) {
-		dev_err(vfe->camss->dev, "Failed to add VFE#%d to power domain\n", id);
+	if (!vfe->genpd_link) {
+		dev_err(vfe->camss->dev, "Failed to add VFE#%d to power domain\n", vfe->id);
 		return -EINVAL;
 	}
 
diff --git a/drivers/media/platform/qcom/camss/camss-vfe-4-8.c b/drivers/media/platform/qcom/camss/camss-vfe-4-8.c
index 7b3805177f037..5e95343241304 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-4-8.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-4-8.c
@@ -1099,9 +1099,7 @@ static void vfe_isr_read(struct vfe_device *vfe, u32 *value0, u32 *value1)
  */
 static void vfe_pm_domain_off(struct vfe_device *vfe)
 {
-	struct camss *camss = vfe->camss;
-
-	device_link_del(camss->genpd_link[vfe->id]);
+	device_link_del(vfe->genpd_link);
 }
 
 /*
@@ -1111,13 +1109,12 @@ static void vfe_pm_domain_off(struct vfe_device *vfe)
 static int vfe_pm_domain_on(struct vfe_device *vfe)
 {
 	struct camss *camss = vfe->camss;
-	enum vfe_line_id id = vfe->id;
 
-	camss->genpd_link[id] = device_link_add(camss->dev, camss->genpd[id], DL_FLAG_STATELESS |
-						DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE);
+	vfe->genpd_link = device_link_add(camss->dev, vfe->genpd, DL_FLAG_STATELESS |
+					  DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE);
 
-	if (!camss->genpd_link[id]) {
-		dev_err(vfe->camss->dev, "Failed to add VFE#%d to power domain\n", id);
+	if (!vfe->genpd_link) {
+		dev_err(vfe->camss->dev, "Failed to add VFE#%d to power domain\n", vfe->id);
 		return -EINVAL;
 	}
 
diff --git a/drivers/media/platform/qcom/camss/camss-vfe-480.c b/drivers/media/platform/qcom/camss/camss-vfe-480.c
index f2368b77fc6d6..a70b8633bb3eb 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-480.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-480.c
@@ -463,7 +463,7 @@ static void vfe_pm_domain_off(struct vfe_device *vfe)
 	if (vfe->id >= camss->res->vfe_num)
 		return;
 
-	device_link_del(camss->genpd_link[vfe->id]);
+	device_link_del(vfe->genpd_link);
 }
 
 /*
@@ -473,16 +473,15 @@ static void vfe_pm_domain_off(struct vfe_device *vfe)
 static int vfe_pm_domain_on(struct vfe_device *vfe)
 {
 	struct camss *camss = vfe->camss;
-	enum vfe_line_id id = vfe->id;
 
-	if (id >= camss->res->vfe_num)
+	if (vfe->id >= camss->res->vfe_num)
 		return 0;
 
-	camss->genpd_link[id] = device_link_add(camss->dev, camss->genpd[id],
-						DL_FLAG_STATELESS |
-						DL_FLAG_PM_RUNTIME |
-						DL_FLAG_RPM_ACTIVE);
-	if (!camss->genpd_link[id])
+	vfe->genpd_link = device_link_add(camss->dev, vfe->genpd,
+					  DL_FLAG_STATELESS |
+					  DL_FLAG_PM_RUNTIME |
+					  DL_FLAG_RPM_ACTIVE);
+	if (!vfe->genpd_link)
 		return -EINVAL;
 
 	return 0;
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c
index 4839e2cedfe58..94267b9974554 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe.c
@@ -1347,6 +1347,9 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
 	if (!res->line_num)
 		return -EINVAL;
 
+	if (res->has_pd)
+		vfe->genpd = camss->genpd[id];
+
 	vfe->line_num = res->line_num;
 	vfe->ops->subdev_init(dev, vfe);
 
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.h b/drivers/media/platform/qcom/camss/camss-vfe.h
index 09baded0dcdd6..c1c50023d4876 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.h
+++ b/drivers/media/platform/qcom/camss/camss-vfe.h
@@ -150,6 +150,8 @@ struct vfe_device {
 	const struct vfe_hw_ops_gen1 *ops_gen1;
 	struct vfe_isr_ops isr_ops;
 	struct camss_video_ops video_ops;
+	struct device *genpd;
+	struct device_link *genpd_link;
 };
 
 struct camss_subdev_resources;

-- 
2.42.0

[PATCH v6 3/8] media: qcom: camss: Use common VFE pm_domain_on/pm_domain_off where applicable

[Bryan O'Donoghue]

For the various versions of VFE we have a boiler-plate
pm_domain_on/pm_domain_off callback pair of the general form.

- Error check.
  Not always done but applicable to all.

- device_link_add (DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME |
                   DL_FLAG_RPM_ACTIVE);

- Error check returning -EINVAL on error.

- Return 0

Reduce the pattern down to a common callback. VFE 4.1 is a special case
which to me also indicates that it is worthwhile maintaining an indirection
for the vfe_pm_domain_{on|off} for now.

Otherwise lets chuck out a bunch of needlessly replicated code.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Suggested-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Tested-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 drivers/media/platform/qcom/camss/camss-vfe-170.c | 35 -----------------------
 drivers/media/platform/qcom/camss/camss-vfe-4-1.c |  8 +++---
 drivers/media/platform/qcom/camss/camss-vfe-4-7.c | 31 --------------------
 drivers/media/platform/qcom/camss/camss-vfe-4-8.c | 28 ------------------
 drivers/media/platform/qcom/camss/camss-vfe-480.c | 35 -----------------------
 drivers/media/platform/qcom/camss/camss-vfe.c     | 34 ++++++++++++++++++++++
 drivers/media/platform/qcom/camss/camss-vfe.h     | 12 ++++++++
 7 files changed, 50 insertions(+), 133 deletions(-)

diff --git a/drivers/media/platform/qcom/camss/camss-vfe-170.c b/drivers/media/platform/qcom/camss/camss-vfe-170.c
index 7451484317cc3..795ac3815339a 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-170.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-170.c
@@ -627,41 +627,6 @@ static void vfe_isr_wm_done(struct vfe_device *vfe, u8 wm)
 	spin_unlock_irqrestore(&vfe->output_lock, flags);
 }
 
-/*
- * vfe_pm_domain_off - Disable power domains specific to this VFE.
- * @vfe: VFE Device
- */
-static void vfe_pm_domain_off(struct vfe_device *vfe)
-{
-	struct camss *camss = vfe->camss;
-
-	if (vfe->id >= camss->res->vfe_num)
-		return;
-
-	device_link_del(vfe->genpd_link);
-}
-
-/*
- * vfe_pm_domain_on - Enable power domains specific to this VFE.
- * @vfe: VFE Device
- */
-static int vfe_pm_domain_on(struct vfe_device *vfe)
-{
-	struct camss *camss = vfe->camss;
-
-	if (vfe->id >= camss->res->vfe_num)
-		return 0;
-
-	vfe->genpd_link = device_link_add(camss->dev, vfe->genpd,
-					  DL_FLAG_STATELESS |
-					  DL_FLAG_PM_RUNTIME |
-					  DL_FLAG_RPM_ACTIVE);
-	if (!vfe->genpd_link)
-		return -EINVAL;
-
-	return 0;
-}
-
 /*
  * vfe_queue_buffer - Add empty buffer
  * @vid: Video device structure
diff --git a/drivers/media/platform/qcom/camss/camss-vfe-4-1.c b/drivers/media/platform/qcom/camss/camss-vfe-4-1.c
index 2911e4126e7ad..ef6b34c915df1 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-4-1.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-4-1.c
@@ -936,7 +936,7 @@ static irqreturn_t vfe_isr(int irq, void *dev)
  * vfe_pm_domain_off - Disable power domains specific to this VFE.
  * @vfe: VFE Device
  */
-static void vfe_pm_domain_off(struct vfe_device *vfe)
+static void vfe_4_1_pm_domain_off(struct vfe_device *vfe)
 {
 	/* nop */
 }
@@ -945,7 +945,7 @@ static void vfe_pm_domain_off(struct vfe_device *vfe)
  * vfe_pm_domain_on - Enable power domains specific to this VFE.
  * @vfe: VFE Device
  */
-static int vfe_pm_domain_on(struct vfe_device *vfe)
+static int vfe_4_1_pm_domain_on(struct vfe_device *vfe)
 {
 	return 0;
 }
@@ -999,8 +999,8 @@ const struct vfe_hw_ops vfe_ops_4_1 = {
 	.hw_version = vfe_hw_version,
 	.isr_read = vfe_isr_read,
 	.isr = vfe_isr,
-	.pm_domain_off = vfe_pm_domain_off,
-	.pm_domain_on = vfe_pm_domain_on,
+	.pm_domain_off = vfe_4_1_pm_domain_off,
+	.pm_domain_on = vfe_4_1_pm_domain_on,
 	.reg_update_clear = vfe_reg_update_clear,
 	.reg_update = vfe_reg_update,
 	.subdev_init = vfe_subdev_init,
diff --git a/drivers/media/platform/qcom/camss/camss-vfe-4-7.c b/drivers/media/platform/qcom/camss/camss-vfe-4-7.c
index 2b4e7e039407b..7655d22a9fda2 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-4-7.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-4-7.c
@@ -1103,37 +1103,6 @@ static void vfe_isr_read(struct vfe_device *vfe, u32 *value0, u32 *value1)
 	writel_relaxed(VFE_0_IRQ_CMD_GLOBAL_CLEAR, vfe->base + VFE_0_IRQ_CMD);
 }
 
-/*
- * vfe_pm_domain_off - Disable power domains specific to this VFE.
- * @vfe: VFE Device
- */
-static void vfe_pm_domain_off(struct vfe_device *vfe)
-{
-	if (!vfe)
-		return;
-
-	device_link_del(vfe->genpd_link);
-}
-
-/*
- * vfe_pm_domain_on - Enable power domains specific to this VFE.
- * @vfe: VFE Device
- */
-static int vfe_pm_domain_on(struct vfe_device *vfe)
-{
-	struct camss *camss = vfe->camss;
-
-	vfe->genpd_link = device_link_add(camss->dev, vfe->genpd, DL_FLAG_STATELESS |
-					  DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE);
-
-	if (!vfe->genpd_link) {
-		dev_err(vfe->camss->dev, "Failed to add VFE#%d to power domain\n", vfe->id);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
 static void vfe_violation_read(struct vfe_device *vfe)
 {
 	u32 violation = readl_relaxed(vfe->base + VFE_0_VIOLATION_STATUS);
diff --git a/drivers/media/platform/qcom/camss/camss-vfe-4-8.c b/drivers/media/platform/qcom/camss/camss-vfe-4-8.c
index 5e95343241304..f52fa30f3853e 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-4-8.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-4-8.c
@@ -1093,34 +1093,6 @@ static void vfe_isr_read(struct vfe_device *vfe, u32 *value0, u32 *value1)
 	writel_relaxed(VFE_0_IRQ_CMD_GLOBAL_CLEAR, vfe->base + VFE_0_IRQ_CMD);
 }
 
-/*
- * vfe_pm_domain_off - Disable power domains specific to this VFE.
- * @vfe: VFE Device
- */
-static void vfe_pm_domain_off(struct vfe_device *vfe)
-{
-	device_link_del(vfe->genpd_link);
-}
-
-/*
- * vfe_pm_domain_on - Enable power domains specific to this VFE.
- * @vfe: VFE Device
- */
-static int vfe_pm_domain_on(struct vfe_device *vfe)
-{
-	struct camss *camss = vfe->camss;
-
-	vfe->genpd_link = device_link_add(camss->dev, vfe->genpd, DL_FLAG_STATELESS |
-					  DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE);
-
-	if (!vfe->genpd_link) {
-		dev_err(vfe->camss->dev, "Failed to add VFE#%d to power domain\n", vfe->id);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
 static void vfe_violation_read(struct vfe_device *vfe)
 {
 	u32 violation = readl_relaxed(vfe->base + VFE_0_VIOLATION_STATUS);
diff --git a/drivers/media/platform/qcom/camss/camss-vfe-480.c b/drivers/media/platform/qcom/camss/camss-vfe-480.c
index a70b8633bb3eb..4652e8b4cff58 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-480.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-480.c
@@ -452,41 +452,6 @@ static void vfe_isr_wm_done(struct vfe_device *vfe, u8 wm)
 	spin_unlock_irqrestore(&vfe->output_lock, flags);
 }
 
-/*
- * vfe_pm_domain_off - Disable power domains specific to this VFE.
- * @vfe: VFE Device
- */
-static void vfe_pm_domain_off(struct vfe_device *vfe)
-{
-	struct camss *camss = vfe->camss;
-
-	if (vfe->id >= camss->res->vfe_num)
-		return;
-
-	device_link_del(vfe->genpd_link);
-}
-
-/*
- * vfe_pm_domain_on - Enable power domains specific to this VFE.
- * @vfe: VFE Device
- */
-static int vfe_pm_domain_on(struct vfe_device *vfe)
-{
-	struct camss *camss = vfe->camss;
-
-	if (vfe->id >= camss->res->vfe_num)
-		return 0;
-
-	vfe->genpd_link = device_link_add(camss->dev, vfe->genpd,
-					  DL_FLAG_STATELESS |
-					  DL_FLAG_PM_RUNTIME |
-					  DL_FLAG_RPM_ACTIVE);
-	if (!vfe->genpd_link)
-		return -EINVAL;
-
-	return 0;
-}
-
 /*
  * vfe_queue_buffer - Add empty buffer
  * @vid: Video device structure
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c
index 94267b9974554..5172eb5612a1c 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe.c
@@ -474,6 +474,40 @@ void vfe_isr_reset_ack(struct vfe_device *vfe)
 	complete(&vfe->reset_complete);
 }
 
+/*
+ * vfe_pm_domain_off - Disable power domains specific to this VFE.
+ * @vfe: VFE Device
+ */
+void vfe_pm_domain_off(struct vfe_device *vfe)
+{
+	if (!vfe->genpd)
+		return;
+
+	device_link_del(vfe->genpd_link);
+	vfe->genpd_link = NULL;
+}
+
+/*
+ * vfe_pm_domain_on - Enable power domains specific to this VFE.
+ * @vfe: VFE Device
+ */
+int vfe_pm_domain_on(struct vfe_device *vfe)
+{
+	struct camss *camss = vfe->camss;
+
+	if (!vfe->genpd)
+		return 0;
+
+	vfe->genpd_link = device_link_add(camss->dev, vfe->genpd,
+					  DL_FLAG_STATELESS |
+					  DL_FLAG_PM_RUNTIME |
+					  DL_FLAG_RPM_ACTIVE);
+	if (!vfe->genpd_link)
+		return -EINVAL;
+
+	return 0;
+}
+
 static int vfe_match_clock_names(struct vfe_device *vfe,
 				 struct camss_clock *clock)
 {
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.h b/drivers/media/platform/qcom/camss/camss-vfe.h
index c1c50023d4876..992a2103ec44c 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.h
+++ b/drivers/media/platform/qcom/camss/camss-vfe.h
@@ -203,6 +203,18 @@ int vfe_reset(struct vfe_device *vfe);
  */
 int vfe_disable(struct vfe_line *line);
 
+/*
+ * vfe_pm_domain_off - Disable power domains specific to this VFE.
+ * @vfe: VFE Device
+ */
+void vfe_pm_domain_off(struct vfe_device *vfe);
+
+/*
+ * vfe_pm_domain_on - Enable power domains specific to this VFE.
+ * @vfe: VFE Device
+ */
+int vfe_pm_domain_on(struct vfe_device *vfe);
+
 extern const struct vfe_hw_ops vfe_ops_4_1;
 extern const struct vfe_hw_ops vfe_ops_4_7;
 extern const struct vfe_hw_ops vfe_ops_4_8;

-- 
2.42.0

[PATCH v6 4/8] media: qcom: camss: Move VFE power-domain specifics into vfe.c

[Bryan O'Donoghue]

Moving the location of the hooks to VFE power domains has several
advantages.

1. Separation of concerns and functional decomposition.
   vfe.c should be responsible for and know best how manage
   power-domains for a VFE, excising from camss.c follows this
   principle.

2. Embedding a pointer to genpd in struct camss_vfe{} meas that we can
   dispense with a bunch of kmalloc array inside of camss.c.

3. Splitting up titan top gdsc from vfe/ife gdsc provides a base for
   breaking up magic indexes in dtsi.

Suggested-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Tested-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 drivers/media/platform/qcom/camss/camss-vfe.c | 21 ++++++++-
 drivers/media/platform/qcom/camss/camss-vfe.h |  2 +
 drivers/media/platform/qcom/camss/camss.c     | 67 ++++++++++++++-------------
 drivers/media/platform/qcom/camss/camss.h     |  4 +-
 4 files changed, 59 insertions(+), 35 deletions(-)

diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c
index 5172eb5612a1c..60c4730e7c9d1 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe.c
@@ -14,6 +14,7 @@
 #include <linux/mutex.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
+#include <linux/pm_domain.h>
 #include <linux/pm_runtime.h>
 #include <linux/spinlock_types.h>
 #include <linux/spinlock.h>
@@ -1381,8 +1382,11 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
 	if (!res->line_num)
 		return -EINVAL;
 
-	if (res->has_pd)
-		vfe->genpd = camss->genpd[id];
+	if (res->has_pd) {
+		vfe->genpd = dev_pm_domain_attach_by_id(camss->dev, id);
+		if (IS_ERR(vfe->genpd))
+			return PTR_ERR(vfe->genpd);
+	}
 
 	vfe->line_num = res->line_num;
 	vfe->ops->subdev_init(dev, vfe);
@@ -1506,6 +1510,19 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
 	return 0;
 }
 
+/*
+ * msm_vfe_genpd_cleanup - Cleanup VFE genpd linkages
+ * @vfe: VFE device
+ */
+void msm_vfe_genpd_cleanup(struct vfe_device *vfe)
+{
+	if (vfe->genpd_link)
+		device_link_del(vfe->genpd_link);
+
+	if (vfe->genpd)
+		dev_pm_domain_detach(vfe->genpd, true);
+}
+
 /*
  * vfe_link_setup - Setup VFE connections
  * @entity: Pointer to media entity structure
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.h b/drivers/media/platform/qcom/camss/camss-vfe.h
index 992a2103ec44c..cdbe59d8d437e 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.h
+++ b/drivers/media/platform/qcom/camss/camss-vfe.h
@@ -159,6 +159,8 @@ struct camss_subdev_resources;
 int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
 			const struct camss_subdev_resources *res, u8 id);
 
+void msm_vfe_genpd_cleanup(struct vfe_device *vfe);
+
 int msm_vfe_register_entities(struct vfe_device *vfe,
 			      struct v4l2_device *v4l2_dev);
 
diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
index ed01a3ac7a38e..35918cf837bdd 100644
--- a/drivers/media/platform/qcom/camss/camss.c
+++ b/drivers/media/platform/qcom/camss/camss.c
@@ -1486,7 +1486,9 @@ static const struct media_device_ops camss_media_ops = {
 
 static int camss_configure_pd(struct camss *camss)
 {
+	const struct camss_resources *res = camss->res;
 	struct device *dev = camss->dev;
+	int vfepd_num;
 	int i;
 	int ret;
 
@@ -1506,45 +1508,41 @@ static int camss_configure_pd(struct camss *camss)
 	if (camss->genpd_num == 1)
 		return 0;
 
-	camss->genpd = devm_kmalloc_array(dev, camss->genpd_num,
-					  sizeof(*camss->genpd), GFP_KERNEL);
-	if (!camss->genpd)
-		return -ENOMEM;
+	/* count the # of VFEs which have flagged power-domain */
+	for (vfepd_num = i = 0; i < camss->vfe_total_num; i++) {
+		if (res->vfe_res[i].has_pd)
+			vfepd_num++;
+	}
 
-	camss->genpd_link = devm_kmalloc_array(dev, camss->genpd_num,
-					       sizeof(*camss->genpd_link),
-					       GFP_KERNEL);
-	if (!camss->genpd_link)
-		return -ENOMEM;
+	/*
+	 * If the number of power-domains is greater than the number of VFEs
+	 * then the additional power-domain is for the entire CAMSS block.
+	 */
+	if (!(camss->genpd_num > vfepd_num))
+		return 0;
 
 	/*
 	 * VFE power domains are in the beginning of the list, and while all
 	 * power domains should be attached, only if TITAN_TOP power domain is
 	 * found in the list, it should be linked over here.
 	 */
-	for (i = 0; i < camss->genpd_num; i++) {
-		camss->genpd[i] = dev_pm_domain_attach_by_id(camss->dev, i);
-		if (IS_ERR(camss->genpd[i])) {
-			ret = PTR_ERR(camss->genpd[i]);
-			goto fail_pm;
-		}
+	camss->genpd = dev_pm_domain_attach_by_id(camss->dev, camss->genpd_num - 1);
+	if (IS_ERR(camss->genpd)) {
+		ret = PTR_ERR(camss->genpd);
+		goto fail_pm;
 	}
-
-	if (i > camss->res->vfe_num) {
-		camss->genpd_link[i - 1] = device_link_add(camss->dev, camss->genpd[i - 1],
-							   DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME |
-							   DL_FLAG_RPM_ACTIVE);
-		if (!camss->genpd_link[i - 1]) {
-			ret = -EINVAL;
-			goto fail_pm;
-		}
+	camss->genpd_link = device_link_add(camss->dev, camss->genpd,
+					    DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME |
+					    DL_FLAG_RPM_ACTIVE);
+	if (!camss->genpd_link) {
+		ret = -EINVAL;
+		goto fail_pm;
 	}
 
 	return 0;
 
 fail_pm:
-	for (--i ; i >= 0; i--)
-		dev_pm_domain_detach(camss->genpd[i], true);
+	dev_pm_domain_detach(camss->genpd, true);
 
 	return ret;
 }
@@ -1566,18 +1564,25 @@ static int camss_icc_get(struct camss *camss)
 	return 0;
 }
 
-static void camss_genpd_cleanup(struct camss *camss)
+static void camss_genpd_subdevice_cleanup(struct camss *camss)
 {
 	int i;
 
+	for (i = 0; i < camss->vfe_total_num; i++)
+		msm_vfe_genpd_cleanup(&camss->vfe[i]);
+}
+
+static void camss_genpd_cleanup(struct camss *camss)
+{
 	if (camss->genpd_num == 1)
 		return;
 
-	if (camss->genpd_num > camss->res->vfe_num)
-		device_link_del(camss->genpd_link[camss->genpd_num - 1]);
+	camss_genpd_subdevice_cleanup(camss);
+
+	if (camss->genpd_link)
+		device_link_del(camss->genpd_link);
 
-	for (i = 0; i < camss->genpd_num; i++)
-		dev_pm_domain_detach(camss->genpd[i], true);
+	dev_pm_domain_detach(camss->genpd, true);
 }
 
 /*
diff --git a/drivers/media/platform/qcom/camss/camss.h b/drivers/media/platform/qcom/camss/camss.h
index b854cff1774d4..1ba824a2cb76c 100644
--- a/drivers/media/platform/qcom/camss/camss.h
+++ b/drivers/media/platform/qcom/camss/camss.h
@@ -107,8 +107,8 @@ struct camss {
 	struct vfe_device *vfe;
 	atomic_t ref_count;
 	int genpd_num;
-	struct device **genpd;
-	struct device_link **genpd_link;
+	struct device *genpd;
+	struct device_link *genpd_link;
 	struct icc_path *icc_path[ICC_SM8250_COUNT];
 	const struct camss_resources *res;
 	unsigned int vfe_total_num;

-- 
2.42.0

[PATCH v6 5/8] media: qcom: camss: Add support for named power-domains

[Bryan O'Donoghue]

Right now we use fixed indexes to assign power-domains, with a
requirement for the TOP GDSC to come last in the list.

Adding support for named power-domains means the declaration in the dtsi
can come in any order.

After this change we continue to support the old indexing - if a SoC
resource declaration or the in-use dtb doesn't declare power-domain names
we fall back to the default legacy indexing.

From this point on though new SoC additions should contain named
power-domains, eventually we will drop support for legacy indexing.

Tested-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 drivers/media/platform/qcom/camss/camss-vfe.c | 24 +++++++++++++++++++++++-
 drivers/media/platform/qcom/camss/camss.c     | 26 +++++++++++++++++++++-----
 drivers/media/platform/qcom/camss/camss.h     |  2 ++
 3 files changed, 46 insertions(+), 6 deletions(-)

diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c
index 60c4730e7c9d1..083d1445a6e25 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe.c
@@ -1382,7 +1382,29 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
 	if (!res->line_num)
 		return -EINVAL;
 
-	if (res->has_pd) {
+	/* Power domain */
+
+	if (res->pd_name) {
+		vfe->genpd = dev_pm_domain_attach_by_name(camss->dev,
+							  res->pd_name);
+		if (IS_ERR(vfe->genpd)) {
+			ret = PTR_ERR(vfe->genpd);
+			return ret;
+		}
+	}
+
+	if (!vfe->genpd && res->has_pd) {
+		/*
+		 * Legacy magic index.
+		 * Requires
+		 * power-domain = <VFE_X>,
+		 *                <VFE_Y>,
+		 *                <TITAN_TOP>
+		 * id must correspondng to the index of the VFE which must
+		 * come before the TOP GDSC. VFE Lite has no individually
+		 * collapasible domain which is why id < vfe_num is a valid
+		 * check.
+		 */
 		vfe->genpd = dev_pm_domain_attach_by_id(camss->dev, id);
 		if (IS_ERR(vfe->genpd))
 			return PTR_ERR(vfe->genpd);
diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
index 35918cf837bdd..f2d2317c38b5b 100644
--- a/drivers/media/platform/qcom/camss/camss.c
+++ b/drivers/media/platform/qcom/camss/camss.c
@@ -1522,12 +1522,28 @@ static int camss_configure_pd(struct camss *camss)
 		return 0;
 
 	/*
-	 * VFE power domains are in the beginning of the list, and while all
-	 * power domains should be attached, only if TITAN_TOP power domain is
-	 * found in the list, it should be linked over here.
+	 * If a power-domain name is defined try to use it.
+	 * It is possible we are running a new kernel with an old dtb so
+	 * fallback to indexes even if a pd_name is defined but not found.
 	 */
-	camss->genpd = dev_pm_domain_attach_by_id(camss->dev, camss->genpd_num - 1);
-	if (IS_ERR(camss->genpd)) {
+	if (camss->res->pd_name) {
+		camss->genpd = dev_pm_domain_attach_by_name(camss->dev,
+							    camss->res->pd_name);
+		if (IS_ERR(camss->genpd)) {
+			ret = PTR_ERR(camss->genpd);
+			goto fail_pm;
+		}
+	}
+
+	if (!camss->genpd) {
+		/*
+		 * Legacy magic index. TITAN_TOP GDSC must be the last
+		 * item in the power-domain list.
+		 */
+		camss->genpd = dev_pm_domain_attach_by_id(camss->dev,
+							  camss->genpd_num - 1);
+	}
+	if (IS_ERR_OR_NULL(camss->genpd)) {
 		ret = PTR_ERR(camss->genpd);
 		goto fail_pm;
 	}
diff --git a/drivers/media/platform/qcom/camss/camss.h b/drivers/media/platform/qcom/camss/camss.h
index 1ba824a2cb76c..cd8186fe1797b 100644
--- a/drivers/media/platform/qcom/camss/camss.h
+++ b/drivers/media/platform/qcom/camss/camss.h
@@ -48,6 +48,7 @@ struct camss_subdev_resources {
 	u32 clock_rate[CAMSS_RES_MAX][CAMSS_RES_MAX];
 	char *reg[CAMSS_RES_MAX];
 	char *interrupt[CAMSS_RES_MAX];
+	char *pd_name;
 	u8 line_num;
 	bool has_pd;
 	const void *ops;
@@ -84,6 +85,7 @@ enum icc_count {
 
 struct camss_resources {
 	enum camss_version version;
+	const char *pd_name;
 	const struct camss_subdev_resources *csiphy_res;
 	const struct camss_subdev_resources *csid_res;
 	const struct camss_subdev_resources *ispif_res;

-- 
2.42.0

[PATCH v6 6/8] media: qcom: camss: Flag VFE-lites to support more VFEs

[Bryan O'Donoghue]

From: Matti Lehtimäki <matti.lehtimaki@gmail.com>

Some platforms such as SC7280 have three VFEs and two VFE-lites. Current
code has hard-coded two as the maximum number of VFEs. Remove the
hard-coded maximum number of VFEs to handle all possible combinations of
VFEs and VFE-lites.

Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202311200405.h6G4L9oe-lkp@intel.com
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 drivers/media/platform/qcom/camss/camss-vfe-480.c | 33 +++++++++++------------
 drivers/media/platform/qcom/camss/camss-vfe.c     |  5 ++++
 drivers/media/platform/qcom/camss/camss-vfe.h     | 10 +++++++
 drivers/media/platform/qcom/camss/camss.c         | 26 +++++++++---------
 drivers/media/platform/qcom/camss/camss.h         |  3 +--
 5 files changed, 44 insertions(+), 33 deletions(-)

diff --git a/drivers/media/platform/qcom/camss/camss-vfe-480.c b/drivers/media/platform/qcom/camss/camss-vfe-480.c
index 4652e8b4cff58..dc2735476c823 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-480.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-480.c
@@ -15,31 +15,28 @@
 #include "camss.h"
 #include "camss-vfe.h"
 
-/* VFE 2/3 are lite and have a different register layout */
-#define IS_LITE		(vfe->id >= 2 ? 1 : 0)
-
 #define VFE_HW_VERSION			(0x00)
 
-#define VFE_GLOBAL_RESET_CMD		(IS_LITE ? 0x0c : 0x1c)
-#define	    GLOBAL_RESET_HW_AND_REG	(IS_LITE ? BIT(1) : BIT(0))
+#define VFE_GLOBAL_RESET_CMD		(vfe_is_lite(vfe) ? 0x0c : 0x1c)
+#define	    GLOBAL_RESET_HW_AND_REG	(vfe_is_lite(vfe) ? BIT(1) : BIT(0))
 
-#define VFE_REG_UPDATE_CMD		(IS_LITE ? 0x20 : 0x34)
+#define VFE_REG_UPDATE_CMD		(vfe_is_lite(vfe) ? 0x20 : 0x34)
 static inline int reg_update_rdi(struct vfe_device *vfe, int n)
 {
-	return IS_LITE ? BIT(n) : BIT(1 + (n));
+	return vfe_is_lite(vfe) ? BIT(n) : BIT(1 + (n));
 }
 
 #define	    REG_UPDATE_RDI		reg_update_rdi
-#define VFE_IRQ_CMD			(IS_LITE ? 0x24 : 0x38)
+#define VFE_IRQ_CMD			(vfe_is_lite(vfe) ? 0x24 : 0x38)
 #define     IRQ_CMD_GLOBAL_CLEAR	BIT(0)
 
-#define VFE_IRQ_MASK(n)			((IS_LITE ? 0x28 : 0x3c) + (n) * 4)
-#define	    IRQ_MASK_0_RESET_ACK	(IS_LITE ? BIT(17) : BIT(0))
-#define	    IRQ_MASK_0_BUS_TOP_IRQ	(IS_LITE ? BIT(4) : BIT(7))
-#define VFE_IRQ_CLEAR(n)		((IS_LITE ? 0x34 : 0x48) + (n) * 4)
-#define VFE_IRQ_STATUS(n)		((IS_LITE ? 0x40 : 0x54) + (n) * 4)
+#define VFE_IRQ_MASK(n)			((vfe_is_lite(vfe) ? 0x28 : 0x3c) + (n) * 4)
+#define	    IRQ_MASK_0_RESET_ACK	(vfe_is_lite(vfe) ? BIT(17) : BIT(0))
+#define	    IRQ_MASK_0_BUS_TOP_IRQ	(vfe_is_lite(vfe) ? BIT(4) : BIT(7))
+#define VFE_IRQ_CLEAR(n)		((vfe_is_lite(vfe) ? 0x34 : 0x48) + (n) * 4)
+#define VFE_IRQ_STATUS(n)		((vfe_is_lite(vfe) ? 0x40 : 0x54) + (n) * 4)
 
-#define BUS_REG_BASE			(IS_LITE ? 0x1a00 : 0xaa00)
+#define BUS_REG_BASE			(vfe_is_lite(vfe) ? 0x1a00 : 0xaa00)
 
 #define VFE_BUS_WM_CGC_OVERRIDE		(BUS_REG_BASE + 0x08)
 #define		WM_CGC_OVERRIDE_ALL	(0x3FFFFFF)
@@ -49,13 +46,13 @@ static inline int reg_update_rdi(struct vfe_device *vfe, int n)
 #define VFE_BUS_IRQ_MASK(n)		(BUS_REG_BASE + 0x18 + (n) * 4)
 static inline int bus_irq_mask_0_rdi_rup(struct vfe_device *vfe, int n)
 {
-	return IS_LITE ? BIT(n) : BIT(3 + (n));
+	return vfe_is_lite(vfe) ? BIT(n) : BIT(3 + (n));
 }
 
 #define     BUS_IRQ_MASK_0_RDI_RUP	bus_irq_mask_0_rdi_rup
 static inline int bus_irq_mask_0_comp_done(struct vfe_device *vfe, int n)
 {
-	return IS_LITE ? BIT(4 + (n)) : BIT(6 + (n));
+	return vfe_is_lite(vfe) ? BIT(4 + (n)) : BIT(6 + (n));
 }
 
 #define     BUS_IRQ_MASK_0_COMP_DONE	bus_irq_mask_0_comp_done
@@ -90,8 +87,8 @@ static inline int bus_irq_mask_0_comp_done(struct vfe_device *vfe, int n)
 /* for titan 480, each bus client is hardcoded to a specific path
  * and each bus client is part of a hardcoded "comp group"
  */
-#define RDI_WM(n)			((IS_LITE ? 0 : 23) + (n))
-#define RDI_COMP_GROUP(n)		((IS_LITE ? 0 : 11) + (n))
+#define RDI_WM(n)			((vfe_is_lite(vfe) ? 0 : 23) + (n))
+#define RDI_COMP_GROUP(n)		((vfe_is_lite(vfe) ? 0 : 11) + (n))
 
 #define MAX_VFE_OUTPUT_LINES	4
 
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c
index 083d1445a6e25..b6ec0dc425b2d 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe.c
@@ -1739,3 +1739,8 @@ void msm_vfe_unregister_entities(struct vfe_device *vfe)
 		media_entity_cleanup(&sd->entity);
 	}
 }
+
+bool vfe_is_lite(struct vfe_device *vfe)
+{
+	return vfe->camss->res->vfe_res[vfe->id].is_lite;
+}
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.h b/drivers/media/platform/qcom/camss/camss-vfe.h
index cdbe59d8d437e..0572c9b08e112 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.h
+++ b/drivers/media/platform/qcom/camss/camss-vfe.h
@@ -226,4 +226,14 @@ extern const struct vfe_hw_ops vfe_ops_480;
 int vfe_get(struct vfe_device *vfe);
 void vfe_put(struct vfe_device *vfe);
 
+/*
+ * vfe_is_lite - Return if VFE is VFE lite.
+ * @vfe: VFE Device
+ *
+ * Some VFE lites have a different register layout.
+ *
+ * Return whether VFE is VFE lite
+ */
+bool vfe_is_lite(struct vfe_device *vfe);
+
 #endif /* QC_MSM_CAMSS_VFE_H */
diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
index f2d2317c38b5b..7c49654a12964 100644
--- a/drivers/media/platform/qcom/camss/camss.c
+++ b/drivers/media/platform/qcom/camss/camss.c
@@ -706,6 +706,7 @@ static const struct camss_subdev_resources vfe_res_845[] = {
 				{ 384000000 } },
 		.reg = { "vfe_lite" },
 		.interrupt = { "vfe_lite" },
+		.is_lite = true,
 		.line_num = 4,
 		.ops = &vfe_ops_170
 	}
@@ -886,6 +887,7 @@ static const struct camss_subdev_resources vfe_res_8250[] = {
 				{ 0 } },
 		.reg = { "vfe_lite0" },
 		.interrupt = { "vfe_lite0" },
+		.is_lite = true,
 		.line_num = 4,
 		.ops = &vfe_ops_480
 	},
@@ -905,6 +907,7 @@ static const struct camss_subdev_resources vfe_res_8250[] = {
 				{ 0 } },
 		.reg = { "vfe_lite1" },
 		.interrupt = { "vfe_lite1" },
+		.is_lite = true,
 		.line_num = 4,
 		.ops = &vfe_ops_480
 	},
@@ -1204,7 +1207,7 @@ static int camss_init_subdevices(struct camss *camss)
 	}
 
 	/* note: SM8250 requires VFE to be initialized before CSID */
-	for (i = 0; i < camss->vfe_total_num; i++) {
+	for (i = 0; i < camss->res->vfe_num; i++) {
 		ret = msm_vfe_subdev_init(camss, &camss->vfe[i],
 					  &res->vfe_res[i], i);
 		if (ret < 0) {
@@ -1276,7 +1279,7 @@ static int camss_register_entities(struct camss *camss)
 		goto err_reg_ispif;
 	}
 
-	for (i = 0; i < camss->vfe_total_num; i++) {
+	for (i = 0; i < camss->res->vfe_num; i++) {
 		ret = msm_vfe_register_entities(&camss->vfe[i],
 						&camss->v4l2_dev);
 		if (ret < 0) {
@@ -1348,7 +1351,7 @@ static int camss_register_entities(struct camss *camss)
 				}
 	} else {
 		for (i = 0; i < camss->res->csid_num; i++)
-			for (k = 0; k < camss->vfe_total_num; k++)
+			for (k = 0; k < camss->res->vfe_num; k++)
 				for (j = 0; j < camss->vfe[k].line_num; j++) {
 					struct v4l2_subdev *csid = &camss->csid[i].subdev;
 					struct v4l2_subdev *vfe = &camss->vfe[k].line[j].subdev;
@@ -1372,7 +1375,7 @@ static int camss_register_entities(struct camss *camss)
 	return 0;
 
 err_link:
-	i = camss->vfe_total_num;
+	i = camss->res->vfe_num;
 err_reg_vfe:
 	for (i--; i >= 0; i--)
 		msm_vfe_unregister_entities(&camss->vfe[i]);
@@ -1411,7 +1414,7 @@ static void camss_unregister_entities(struct camss *camss)
 
 	msm_ispif_unregister_entities(camss->ispif);
 
-	for (i = 0; i < camss->vfe_total_num; i++)
+	for (i = 0; i < camss->res->vfe_num; i++)
 		msm_vfe_unregister_entities(&camss->vfe[i]);
 }
 
@@ -1509,7 +1512,7 @@ static int camss_configure_pd(struct camss *camss)
 		return 0;
 
 	/* count the # of VFEs which have flagged power-domain */
-	for (vfepd_num = i = 0; i < camss->vfe_total_num; i++) {
+	for (vfepd_num = i = 0; i < camss->res->vfe_num; i++) {
 		if (res->vfe_res[i].has_pd)
 			vfepd_num++;
 	}
@@ -1584,7 +1587,7 @@ static void camss_genpd_subdevice_cleanup(struct camss *camss)
 {
 	int i;
 
-	for (i = 0; i < camss->vfe_total_num; i++)
+	for (i = 0; i < camss->res->vfe_num; i++)
 		msm_vfe_genpd_cleanup(&camss->vfe[i]);
 }
 
@@ -1641,8 +1644,7 @@ static int camss_probe(struct platform_device *pdev)
 			return -ENOMEM;
 	}
 
-	camss->vfe_total_num = camss->res->vfe_num + camss->res->vfe_lite_num;
-	camss->vfe = devm_kcalloc(dev, camss->vfe_total_num,
+	camss->vfe = devm_kcalloc(dev, camss->res->vfe_num,
 				  sizeof(*camss->vfe), GFP_KERNEL);
 	if (!camss->vfe)
 		return -ENOMEM;
@@ -1800,8 +1802,7 @@ static const struct camss_resources sdm845_resources = {
 	.vfe_res = vfe_res_845,
 	.csiphy_num = ARRAY_SIZE(csiphy_res_845),
 	.csid_num = ARRAY_SIZE(csid_res_845),
-	.vfe_num = 2,
-	.vfe_lite_num = 1,
+	.vfe_num = ARRAY_SIZE(vfe_res_845),
 };
 
 static const struct camss_resources sm8250_resources = {
@@ -1813,8 +1814,7 @@ static const struct camss_resources sm8250_resources = {
 	.icc_path_num = ARRAY_SIZE(icc_res_sm8250),
 	.csiphy_num = ARRAY_SIZE(csiphy_res_8250),
 	.csid_num = ARRAY_SIZE(csid_res_8250),
-	.vfe_num = 2,
-	.vfe_lite_num = 2,
+	.vfe_num = ARRAY_SIZE(vfe_res_8250),
 };
 
 static const struct of_device_id camss_dt_match[] = {
diff --git a/drivers/media/platform/qcom/camss/camss.h b/drivers/media/platform/qcom/camss/camss.h
index cd8186fe1797b..a0c2dcc779f05 100644
--- a/drivers/media/platform/qcom/camss/camss.h
+++ b/drivers/media/platform/qcom/camss/camss.h
@@ -51,6 +51,7 @@ struct camss_subdev_resources {
 	char *pd_name;
 	u8 line_num;
 	bool has_pd;
+	bool is_lite;
 	const void *ops;
 };
 
@@ -95,7 +96,6 @@ struct camss_resources {
 	const unsigned int csiphy_num;
 	const unsigned int csid_num;
 	const unsigned int vfe_num;
-	const unsigned int vfe_lite_num;
 };
 
 struct camss {
@@ -113,7 +113,6 @@ struct camss {
 	struct device_link *genpd_link;
 	struct icc_path *icc_path[ICC_SM8250_COUNT];
 	const struct camss_resources *res;
-	unsigned int vfe_total_num;
 };
 
 struct camss_camera_interface {

-- 
2.42.0

[PATCH v6 7/8] media: qcom: camss: Flag CSID-lites to support more CSIDs

[Bryan O'Donoghue]

From: Matti Lehtimäki <matti.lehtimaki@gmail.com>

Some platforms such as SC7280 have 3 CSIDs and 2 CSID-lites but current
code has hardcoded 2 as the maximum number of CSIDs. Remove the hardcoded
maximum number of VFEs to handle all possible combinations of CSIDs and
CSID-lites.

Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 .../media/platform/qcom/camss/camss-csid-gen2.c    | 31 +++++++++++-----------
 drivers/media/platform/qcom/camss/camss-csid.c     |  5 ++++
 drivers/media/platform/qcom/camss/camss-csid.h     |  7 +++++
 drivers/media/platform/qcom/camss/camss.c          |  3 +++
 4 files changed, 30 insertions(+), 16 deletions(-)

diff --git a/drivers/media/platform/qcom/camss/camss-csid-gen2.c b/drivers/media/platform/qcom/camss/camss-csid-gen2.c
index 05ff5fa8095a8..b11de4797ccae 100644
--- a/drivers/media/platform/qcom/camss/camss-csid-gen2.c
+++ b/drivers/media/platform/qcom/camss/camss-csid-gen2.c
@@ -21,7 +21,6 @@
  * interface support. As a result of that it has an
  * alternate register layout.
  */
-#define IS_LITE		(csid->id >= 2 ? 1 : 0)
 
 #define CSID_HW_VERSION		0x0
 #define		HW_VERSION_STEPPING	0
@@ -35,13 +34,13 @@
 #define	CSID_CSI2_RX_IRQ_MASK	0x24
 #define CSID_CSI2_RX_IRQ_CLEAR	0x28
 
-#define CSID_CSI2_RDIN_IRQ_STATUS(rdi)		((IS_LITE ? 0x30 : 0x40) \
+#define CSID_CSI2_RDIN_IRQ_STATUS(rdi)		((csid_is_lite(csid) ? 0x30 : 0x40) \
 						 + 0x10 * (rdi))
-#define CSID_CSI2_RDIN_IRQ_MASK(rdi)		((IS_LITE ? 0x34 : 0x44) \
+#define CSID_CSI2_RDIN_IRQ_MASK(rdi)		((csid_is_lite(csid) ? 0x34 : 0x44) \
 						 + 0x10 * (rdi))
-#define CSID_CSI2_RDIN_IRQ_CLEAR(rdi)		((IS_LITE ? 0x38 : 0x48) \
+#define CSID_CSI2_RDIN_IRQ_CLEAR(rdi)		((csid_is_lite(csid) ? 0x38 : 0x48) \
 						 + 0x10 * (rdi))
-#define CSID_CSI2_RDIN_IRQ_SET(rdi)		((IS_LITE ? 0x3C : 0x4C) \
+#define CSID_CSI2_RDIN_IRQ_SET(rdi)		((csid_is_lite(csid) ? 0x3C : 0x4C) \
 						 + 0x10 * (rdi))
 
 #define CSID_TOP_IRQ_STATUS	0x70
@@ -73,7 +72,7 @@
 #define			CGC_MODE_DYNAMIC_GATING		0
 #define			CGC_MODE_ALWAYS_ON		1
 
-#define CSID_RDI_CFG0(rdi)			((IS_LITE ? 0x200 : 0x300) \
+#define CSID_RDI_CFG0(rdi)			((csid_is_lite(csid) ? 0x200 : 0x300) \
 						 + 0x100 * (rdi))
 #define		RDI_CFG0_BYTE_CNTR_EN		0
 #define		RDI_CFG0_FORMAT_MEASURE_EN	1
@@ -98,32 +97,32 @@
 #define		RDI_CFG0_PACKING_FORMAT		30
 #define		RDI_CFG0_ENABLE			31
 
-#define CSID_RDI_CFG1(rdi)			((IS_LITE ? 0x204 : 0x304)\
+#define CSID_RDI_CFG1(rdi)			((csid_is_lite(csid) ? 0x204 : 0x304)\
 						+ 0x100 * (rdi))
 #define		RDI_CFG1_TIMESTAMP_STB_SEL	0
 
-#define CSID_RDI_CTRL(rdi)			((IS_LITE ? 0x208 : 0x308)\
+#define CSID_RDI_CTRL(rdi)			((csid_is_lite(csid) ? 0x208 : 0x308)\
 						+ 0x100 * (rdi))
 #define		RDI_CTRL_HALT_CMD		0
 #define			HALT_CMD_HALT_AT_FRAME_BOUNDARY		0
 #define			HALT_CMD_RESUME_AT_FRAME_BOUNDARY	1
 #define		RDI_CTRL_HALT_MODE		2
 
-#define CSID_RDI_FRM_DROP_PATTERN(rdi)			((IS_LITE ? 0x20C : 0x30C)\
+#define CSID_RDI_FRM_DROP_PATTERN(rdi)			((csid_is_lite(csid) ? 0x20C : 0x30C)\
 							+ 0x100 * (rdi))
-#define CSID_RDI_FRM_DROP_PERIOD(rdi)			((IS_LITE ? 0x210 : 0x310)\
+#define CSID_RDI_FRM_DROP_PERIOD(rdi)			((csid_is_lite(csid) ? 0x210 : 0x310)\
 							+ 0x100 * (rdi))
-#define CSID_RDI_IRQ_SUBSAMPLE_PATTERN(rdi)		((IS_LITE ? 0x214 : 0x314)\
+#define CSID_RDI_IRQ_SUBSAMPLE_PATTERN(rdi)		((csid_is_lite(csid) ? 0x214 : 0x314)\
 							+ 0x100 * (rdi))
-#define CSID_RDI_IRQ_SUBSAMPLE_PERIOD(rdi)		((IS_LITE ? 0x218 : 0x318)\
+#define CSID_RDI_IRQ_SUBSAMPLE_PERIOD(rdi)		((csid_is_lite(csid) ? 0x218 : 0x318)\
 							+ 0x100 * (rdi))
-#define CSID_RDI_RPP_PIX_DROP_PATTERN(rdi)		((IS_LITE ? 0x224 : 0x324)\
+#define CSID_RDI_RPP_PIX_DROP_PATTERN(rdi)		((csid_is_lite(csid) ? 0x224 : 0x324)\
 							+ 0x100 * (rdi))
-#define CSID_RDI_RPP_PIX_DROP_PERIOD(rdi)		((IS_LITE ? 0x228 : 0x328)\
+#define CSID_RDI_RPP_PIX_DROP_PERIOD(rdi)		((csid_is_lite(csid) ? 0x228 : 0x328)\
 							+ 0x100 * (rdi))
-#define CSID_RDI_RPP_LINE_DROP_PATTERN(rdi)		((IS_LITE ? 0x22C : 0x32C)\
+#define CSID_RDI_RPP_LINE_DROP_PATTERN(rdi)		((csid_is_lite(csid) ? 0x22C : 0x32C)\
 							+ 0x100 * (rdi))
-#define CSID_RDI_RPP_LINE_DROP_PERIOD(rdi)		((IS_LITE ? 0x230 : 0x330)\
+#define CSID_RDI_RPP_LINE_DROP_PERIOD(rdi)		((csid_is_lite(csid) ? 0x230 : 0x330)\
 							+ 0x100 * (rdi))
 
 #define CSID_TPG_CTRL		0x600
diff --git a/drivers/media/platform/qcom/camss/camss-csid.c b/drivers/media/platform/qcom/camss/camss-csid.c
index 95873f988f7e2..d393618ed54cb 100644
--- a/drivers/media/platform/qcom/camss/camss-csid.c
+++ b/drivers/media/platform/qcom/camss/camss-csid.c
@@ -897,3 +897,8 @@ void msm_csid_unregister_entity(struct csid_device *csid)
 	media_entity_cleanup(&csid->subdev.entity);
 	v4l2_ctrl_handler_free(&csid->ctrls);
 }
+
+inline bool csid_is_lite(struct csid_device *csid)
+{
+	return csid->camss->res->csid_res[csid->id].is_lite;
+}
diff --git a/drivers/media/platform/qcom/camss/camss-csid.h b/drivers/media/platform/qcom/camss/camss-csid.h
index 30d94eb2eb041..fddccb69da13a 100644
--- a/drivers/media/platform/qcom/camss/camss-csid.h
+++ b/drivers/media/platform/qcom/camss/camss-csid.h
@@ -215,5 +215,12 @@ extern const struct csid_hw_ops csid_ops_4_1;
 extern const struct csid_hw_ops csid_ops_4_7;
 extern const struct csid_hw_ops csid_ops_gen2;
 
+/*
+ * csid_is_lite - Check if CSID is CSID lite.
+ * @csid: CSID Device
+ *
+ * Return whether CSID is CSID lite
+ */
+bool csid_is_lite(struct csid_device *csid);
 
 #endif /* QC_MSM_CAMSS_CSID_H */
diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
index 7c49654a12964..942db0dffa59f 100644
--- a/drivers/media/platform/qcom/camss/camss.c
+++ b/drivers/media/platform/qcom/camss/camss.c
@@ -638,6 +638,7 @@ static const struct camss_subdev_resources csid_res_845[] = {
 				{ 384000000 } },
 		.reg = { "csid2" },
 		.interrupt = { "csid2" },
+		.is_lite = true,
 		.ops = &csid_ops_gen2
 	}
 };
@@ -812,6 +813,7 @@ static const struct camss_subdev_resources csid_res_8250[] = {
 				{ 0 } },
 		.reg = { "csid2" },
 		.interrupt = { "csid2" },
+		.is_lite = true,
 		.ops = &csid_ops_gen2
 	},
 	/* CSID3 */
@@ -824,6 +826,7 @@ static const struct camss_subdev_resources csid_res_8250[] = {
 				{ 0 } },
 		.reg = { "csid3" },
 		.interrupt = { "csid3" },
+		.is_lite = true,
 		.ops = &csid_ops_gen2
 	}
 };

-- 
2.42.0

[PATCH v6 8/8] media: qcom: camss: Add sm8250 named power-domain support

[Bryan O'Donoghue]

Declare power-domain names "top", "ife0" and "ife1" eponymously for the
power-domains TITAN_TOP_GDSC, IFE_0_GDSC and IFE_1_GDSC respectively.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 drivers/media/platform/qcom/camss/camss.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
index 942db0dffa59f..3bb23fd29959c 100644
--- a/drivers/media/platform/qcom/camss/camss.c
+++ b/drivers/media/platform/qcom/camss/camss.c
@@ -849,6 +849,7 @@ static const struct camss_subdev_resources vfe_res_8250[] = {
 				{ 0 } },
 		.reg = { "vfe0" },
 		.interrupt = { "vfe0" },
+		.pd_name = "ife0",
 		.line_num = 3,
 		.has_pd = true,
 		.ops = &vfe_ops_480
@@ -870,6 +871,7 @@ static const struct camss_subdev_resources vfe_res_8250[] = {
 				{ 0 } },
 		.reg = { "vfe1" },
 		.interrupt = { "vfe1" },
+		.pd_name = "ife1",
 		.line_num = 3,
 		.has_pd = true,
 		.ops = &vfe_ops_480
@@ -1810,6 +1812,7 @@ static const struct camss_resources sdm845_resources = {
 
 static const struct camss_resources sm8250_resources = {
 	.version = CAMSS_8250,
+	.pd_name = "top",
 	.csiphy_res = csiphy_res_8250,
 	.csid_res = csid_res_8250,
 	.vfe_res = vfe_res_8250,

-- 
2.42.0

Re: [PATCH v6 7/8] media: qcom: camss: Flag CSID-lites to support more CSIDs

[Konrad Dybcio]

On 23.11.2023 18:03, Bryan O'Donoghue wrote:
> From: Matti Lehtimäki <matti.lehtimaki@gmail.com>
> 
> Some platforms such as SC7280 have 3 CSIDs and 2 CSID-lites but current
> code has hardcoded 2 as the maximum number of CSIDs. Remove the hardcoded
> maximum number of VFEs to handle all possible combinations of CSIDs and
> CSID-lites.
> 
> Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>

Konrad

Re: [PATCH v6 4/8] media: qcom: camss: Move VFE power-domain specifics into vfe.c

[Konrad Dybcio]

On 23.11.2023 18:03, Bryan O'Donoghue wrote:
> Moving the location of the hooks to VFE power domains has several
> advantages.
> 
> 1. Separation of concerns and functional decomposition.
>    vfe.c should be responsible for and know best how manage
>    power-domains for a VFE, excising from camss.c follows this
>    principle.
> 
> 2. Embedding a pointer to genpd in struct camss_vfe{} meas that we can
>    dispense with a bunch of kmalloc array inside of camss.c.
> 
> 3. Splitting up titan top gdsc from vfe/ife gdsc provides a base for
>    breaking up magic indexes in dtsi.
> 
> Suggested-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
> Tested-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybciolinaro.org>

Konrad

Re: [PATCH v6 4/8] media: qcom: camss: Move VFE power-domain specifics into vfe.c

[Konrad Dybcio]

On 25.11.2023 13:53, Konrad Dybcio wrote:
> On 23.11.2023 18:03, Bryan O'Donoghue wrote:
>> Moving the location of the hooks to VFE power domains has several
>> advantages.
>>
>> 1. Separation of concerns and functional decomposition.
>>    vfe.c should be responsible for and know best how manage
>>    power-domains for a VFE, excising from camss.c follows this
>>    principle.
>>
>> 2. Embedding a pointer to genpd in struct camss_vfe{} meas that we can
>>    dispense with a bunch of kmalloc array inside of camss.c.
>>
>> 3. Splitting up titan top gdsc from vfe/ife gdsc provides a base for
>>    breaking up magic indexes in dtsi.
>>
>> Suggested-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
>> Tested-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
>> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
>> ---
> Reviewed-by: Konrad Dybcio <konrad.dybciolinaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>

Konrad

Re: [PATCH v6 8/8] media: qcom: camss: Add sm8250 named power-domain support

[Konrad Dybcio]

On 23.11.2023 18:03, Bryan O'Donoghue wrote:
> Declare power-domain names "top", "ife0" and "ife1" eponymously for the
> power-domains TITAN_TOP_GDSC, IFE_0_GDSC and IFE_1_GDSC respectively.
> 
> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
> ---
Not sure if this single case is just for presentation or actually
meant to be merged as part of this, but either way:

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>

Konrad

Re: [PATCH v6 5/8] media: qcom: camss: Add support for named power-domains

[Hans Verkuil]

On 23/11/2023 18:03, Bryan O'Donoghue wrote:
> Right now we use fixed indexes to assign power-domains, with a
> requirement for the TOP GDSC to come last in the list.
> 
> Adding support for named power-domains means the declaration in the dtsi
> can come in any order.
> 
> After this change we continue to support the old indexing - if a SoC
> resource declaration or the in-use dtb doesn't declare power-domain names
> we fall back to the default legacy indexing.
> 
> From this point on though new SoC additions should contain named
> power-domains, eventually we will drop support for legacy indexing.
> 
> Tested-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
> ---
>  drivers/media/platform/qcom/camss/camss-vfe.c | 24 +++++++++++++++++++++++-
>  drivers/media/platform/qcom/camss/camss.c     | 26 +++++++++++++++++++++-----
>  drivers/media/platform/qcom/camss/camss.h     |  2 ++
>  3 files changed, 46 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c
> index 60c4730e7c9d1..083d1445a6e25 100644
> --- a/drivers/media/platform/qcom/camss/camss-vfe.c
> +++ b/drivers/media/platform/qcom/camss/camss-vfe.c
> @@ -1382,7 +1382,29 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
>  	if (!res->line_num)
>  		return -EINVAL;
>  
> -	if (res->has_pd) {
> +	/* Power domain */
> +
> +	if (res->pd_name) {
> +		vfe->genpd = dev_pm_domain_attach_by_name(camss->dev,
> +							  res->pd_name);
> +		if (IS_ERR(vfe->genpd)) {
> +			ret = PTR_ERR(vfe->genpd);
> +			return ret;
> +		}
> +	}
> +
> +	if (!vfe->genpd && res->has_pd) {
> +		/*
> +		 * Legacy magic index.
> +		 * Requires
> +		 * power-domain = <VFE_X>,
> +		 *                <VFE_Y>,
> +		 *                <TITAN_TOP>
> +		 * id must correspondng to the index of the VFE which must
> +		 * come before the TOP GDSC. VFE Lite has no individually
> +		 * collapasible domain which is why id < vfe_num is a valid
> +		 * check.
> +		 */
>  		vfe->genpd = dev_pm_domain_attach_by_id(camss->dev, id);
>  		if (IS_ERR(vfe->genpd))
>  			return PTR_ERR(vfe->genpd);
> diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
> index 35918cf837bdd..f2d2317c38b5b 100644
> --- a/drivers/media/platform/qcom/camss/camss.c
> +++ b/drivers/media/platform/qcom/camss/camss.c
> @@ -1522,12 +1522,28 @@ static int camss_configure_pd(struct camss *camss)
>  		return 0;
>  
>  	/*
> -	 * VFE power domains are in the beginning of the list, and while all
> -	 * power domains should be attached, only if TITAN_TOP power domain is
> -	 * found in the list, it should be linked over here.
> +	 * If a power-domain name is defined try to use it.
> +	 * It is possible we are running a new kernel with an old dtb so
> +	 * fallback to indexes even if a pd_name is defined but not found.
>  	 */
> -	camss->genpd = dev_pm_domain_attach_by_id(camss->dev, camss->genpd_num - 1);
> -	if (IS_ERR(camss->genpd)) {
> +	if (camss->res->pd_name) {
> +		camss->genpd = dev_pm_domain_attach_by_name(camss->dev,
> +							    camss->res->pd_name);
> +		if (IS_ERR(camss->genpd)) {
> +			ret = PTR_ERR(camss->genpd);
> +			goto fail_pm;
> +		}
> +	}
> +
> +	if (!camss->genpd) {
> +		/*
> +		 * Legacy magic index. TITAN_TOP GDSC must be the last
> +		 * item in the power-domain list.
> +		 */
> +		camss->genpd = dev_pm_domain_attach_by_id(camss->dev,
> +							  camss->genpd_num - 1);
> +	}
> +	if (IS_ERR_OR_NULL(camss->genpd)) {
>  		ret = PTR_ERR(camss->genpd);

I get this smatch warning here:

drivers/media/platform/qcom/camss/camss.c:1555 camss_configure_pd() warn: passing zero to 'PTR_ERR'

I'm not really sure what the intent is here.

If the fix is small, then I can change it myself, otherwise I need an updated patch.

Regards,

	Hans

>  		goto fail_pm;
>  	}
> diff --git a/drivers/media/platform/qcom/camss/camss.h b/drivers/media/platform/qcom/camss/camss.h
> index 1ba824a2cb76c..cd8186fe1797b 100644
> --- a/drivers/media/platform/qcom/camss/camss.h
> +++ b/drivers/media/platform/qcom/camss/camss.h
> @@ -48,6 +48,7 @@ struct camss_subdev_resources {
>  	u32 clock_rate[CAMSS_RES_MAX][CAMSS_RES_MAX];
>  	char *reg[CAMSS_RES_MAX];
>  	char *interrupt[CAMSS_RES_MAX];
> +	char *pd_name;
>  	u8 line_num;
>  	bool has_pd;
>  	const void *ops;
> @@ -84,6 +85,7 @@ enum icc_count {
>  
>  struct camss_resources {
>  	enum camss_version version;
> +	const char *pd_name;
>  	const struct camss_subdev_resources *csiphy_res;
>  	const struct camss_subdev_resources *csid_res;
>  	const struct camss_subdev_resources *ispif_res;
> 

[PATCH v6.1] media: qcom: camss: Add support for named power-domains

[Bryan O'Donoghue]

Right now we use fixed indexes to assign power-domains, with a
requirement for the TOP GDSC to come last in the list.

Adding support for named power-domains means the declaration in the dtsi
can come in any order.

After this change we continue to support the old indexing - if a SoC
resource declaration or the in-use dtb doesn't declare power-domain names
we fall back to the default legacy indexing.

From this point on though new SoC additions should contain named
power-domains, eventually we will drop support for legacy indexing.

Tested-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 drivers/media/platform/qcom/camss/camss-vfe.c | 24 +++++++++++++-
 drivers/media/platform/qcom/camss/camss.c     | 31 +++++++++++++++----
 drivers/media/platform/qcom/camss/camss.h     |  2 ++
 3 files changed, 50 insertions(+), 7 deletions(-)

diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c
index 60c4730e7c9d..083d1445a6e2 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe.c
@@ -1382,7 +1382,29 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
 	if (!res->line_num)
 		return -EINVAL;
 
-	if (res->has_pd) {
+	/* Power domain */
+
+	if (res->pd_name) {
+		vfe->genpd = dev_pm_domain_attach_by_name(camss->dev,
+							  res->pd_name);
+		if (IS_ERR(vfe->genpd)) {
+			ret = PTR_ERR(vfe->genpd);
+			return ret;
+		}
+	}
+
+	if (!vfe->genpd && res->has_pd) {
+		/*
+		 * Legacy magic index.
+		 * Requires
+		 * power-domain = <VFE_X>,
+		 *                <VFE_Y>,
+		 *                <TITAN_TOP>
+		 * id must correspondng to the index of the VFE which must
+		 * come before the TOP GDSC. VFE Lite has no individually
+		 * collapasible domain which is why id < vfe_num is a valid
+		 * check.
+		 */
 		vfe->genpd = dev_pm_domain_attach_by_id(camss->dev, id);
 		if (IS_ERR(vfe->genpd))
 			return PTR_ERR(vfe->genpd);
diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
index 35918cf837bd..8de0e9e8d34b 100644
--- a/drivers/media/platform/qcom/camss/camss.c
+++ b/drivers/media/platform/qcom/camss/camss.c
@@ -1522,13 +1522,32 @@ static int camss_configure_pd(struct camss *camss)
 		return 0;
 
 	/*
-	 * VFE power domains are in the beginning of the list, and while all
-	 * power domains should be attached, only if TITAN_TOP power domain is
-	 * found in the list, it should be linked over here.
+	 * If a power-domain name is defined try to use it.
+	 * It is possible we are running a new kernel with an old dtb so
+	 * fallback to indexes even if a pd_name is defined but not found.
 	 */
-	camss->genpd = dev_pm_domain_attach_by_id(camss->dev, camss->genpd_num - 1);
-	if (IS_ERR(camss->genpd)) {
-		ret = PTR_ERR(camss->genpd);
+	if (camss->res->pd_name) {
+		camss->genpd = dev_pm_domain_attach_by_name(camss->dev,
+							    camss->res->pd_name);
+		if (IS_ERR(camss->genpd)) {
+			ret = PTR_ERR(camss->genpd);
+			goto fail_pm;
+		}
+	}
+
+	if (!camss->genpd) {
+		/*
+		 * Legacy magic index. TITAN_TOP GDSC must be the last
+		 * item in the power-domain list.
+		 */
+		camss->genpd = dev_pm_domain_attach_by_id(camss->dev,
+							  camss->genpd_num - 1);
+	}
+	if (IS_ERR_OR_NULL(camss->genpd)) {
+		if (!camss->genpd)
+			ret = -ENODEV;
+		else
+			ret = PTR_ERR(camss->genpd);
 		goto fail_pm;
 	}
 	camss->genpd_link = device_link_add(camss->dev, camss->genpd,
diff --git a/drivers/media/platform/qcom/camss/camss.h b/drivers/media/platform/qcom/camss/camss.h
index 1ba824a2cb76..cd8186fe1797 100644
--- a/drivers/media/platform/qcom/camss/camss.h
+++ b/drivers/media/platform/qcom/camss/camss.h
@@ -48,6 +48,7 @@ struct camss_subdev_resources {
 	u32 clock_rate[CAMSS_RES_MAX][CAMSS_RES_MAX];
 	char *reg[CAMSS_RES_MAX];
 	char *interrupt[CAMSS_RES_MAX];
+	char *pd_name;
 	u8 line_num;
 	bool has_pd;
 	const void *ops;
@@ -84,6 +85,7 @@ enum icc_count {
 
 struct camss_resources {
 	enum camss_version version;
+	const char *pd_name;
 	const struct camss_subdev_resources *csiphy_res;
 	const struct camss_subdev_resources *csid_res;
 	const struct camss_subdev_resources *ispif_res;
-- 
2.42.0

Re: [PATCH v6 5/8] media: qcom: camss: Add support for named power-domains

[Bryan O'Donoghue]

On 06/12/2023 12:35, Hans Verkuil wrote:
>> +	if (IS_ERR_OR_NULL(camss->genpd)) {
>>   		ret = PTR_ERR(camss->genpd);
> I get this smatch warning here:
> 
> drivers/media/platform/qcom/camss/camss.c:1555 camss_configure_pd() warn: passing zero to 'PTR_ERR'
> 
> I'm not really sure what the intent is here.
> 
> If the fix is small, then I can change it myself, otherwise I need an updated patch.
> 
> Regards,
> 
> 	Hans

Update sent