[PATCH v5 0/7] drm: Move to using devm_platform_ioremap_resource

[Anusha Srivatsa <asrivats@redhat.com>]

Start replacing the below occurences with the newer API:
- (devm_)platform_get_resource + devm_ioremap_resource
- (devm_)platform_get_resource + (devm_)ioremap
- platform_get_resource_byname + devm_ioremap
Move all these occurences to uses devm_platform_ioremap_resource
instead.

This is v5 of the series.

Changes in v5:
- Some patches already merged, leave them out.
- Handle return properly. The new API returns a error pointers
and not NULL. While this is taken care of in most drivers in
the series, the sprd and sti needed changes. Thanks to Dan
for pointing this out with his fix:
https://lore.kernel.org/dri-devel/a952e2b4-d4b8-49ac-abd9-9967c50f4a80@stanley.mountain/

Changes in v4:
- Address vc4 driver compilation error

Changes in v3:
- Keep the old snippet of documentation and add further
clarification (Thomas)
- change in vc4 driver for the a resource is not needed.
Add a comment to clarify why that is left behind (Maxime)

Changes in v2:
- Fix compilation errors

Used Coccinelle to make the code changes.Semantic patch:

//First Case
//rule s/platform_get_resource + devm_ioremap_resource/devm_platform_ioremap_resource
@rule_1@
identifier res;
expression ioremap_res;
identifier pdev;
@@
-struct resource *res;
...
-res = platform_get_resource(pdev,...);
-ioremap_res = devm_ioremap_resource(...);
+ioremap_res = devm_platform_ioremap_resource(pdev,0);

//Second case
//rule s/(devm_)platform_get_resource + (devm_)ioremap/devm_platform_ioremap_resource.
@rule_2@
identifier res;
expression ioremap;
identifier pdev;
@@
-struct resource *res;
...
-res = platform_get_resource(pdev,...);
<...
-if (!res) {
-...
-}
...>
-ioremap = devm_ioremap(...);
+ioremap = devm_platform_ioremap_resource(pdev,0);

//Third case
//rule s/(devm_)platform_get_resource_byname + (devm_)ioremap/devm_platform_ioremap_resource_byname.
@rule_3@
identifier res;
expression ioremap;
identifier pdev;
constant mem;
expression name;
@@
-struct resource *res;
<+...
-res = platform_get_resource_byname(pdev,mem,name);
<...
-if (!res) {
-...
-}
...>
-ioremap = devm_ioremap(...);
+ioremap = devm_platform_ioremap_resource_byname(pdev,name);
...+>

Signed-off-by: Anusha Srivatsa <asrivats@redhat.com>
---
Anusha Srivatsa (7):
      drm/fsl-dcu: move to devm_platform_ioremap_resource() usage
      drm/hisilicon: move to devm_platform_ioremap_resource() usage
      drm/mxsfb: move to devm_platform_ioremap_resource() usage
      drm/sprd: move to devm_platform_ioremap_resource() usage
      drm/sti: move to devm_platform_ioremap_resource() usage
      drm/tegra: move to devm_platform_ioremap_resource() usage
      Documentation: Update the todo

 Documentation/gpu/todo.rst                      | 13 +++++++------
 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c       |  4 +---
 drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c    |  4 +---
 drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c |  4 +---
 drivers/gpu/drm/mxsfb/lcdif_drv.c               |  4 +---
 drivers/gpu/drm/mxsfb/mxsfb_drv.c               |  4 +---
 drivers/gpu/drm/sprd/sprd_dpu.c                 | 13 +++----------
 drivers/gpu/drm/sprd/sprd_dsi.c                 | 13 +++----------
 drivers/gpu/drm/sti/sti_compositor.c            | 14 +++-----------
 drivers/gpu/drm/sti/sti_dvo.c                   | 14 +++-----------
 drivers/gpu/drm/sti/sti_hda.c                   | 13 +++----------
 drivers/gpu/drm/sti/sti_hdmi.c                  | 15 +++------------
 drivers/gpu/drm/sti/sti_hqvdp.c                 | 14 +++-----------
 drivers/gpu/drm/sti/sti_tvout.c                 | 14 +++-----------
 drivers/gpu/drm/sti/sti_vtg.c                   | 14 +++-----------
 drivers/gpu/drm/tegra/dsi.c                     |  4 +---
 16 files changed, 40 insertions(+), 121 deletions(-)
---
base-commit: 0670c2f56e45b3f4541985a9ebe06d04308e43b0
change-id: 20250304-mem-fixes-34df71d18b98

Best regards,
-- 
Anusha Srivatsa <asrivats@redhat.com>