* [PATCH v2] drm/msm/dp: always add fail-safe mode into connector mode list
@ 2022-01-24 23:17 Kuogee Hsieh
2022-02-14 16:41 ` Kuogee Hsieh
2022-02-16 19:32 ` Stephen Boyd
0 siblings, 2 replies; 3+ messages in thread
From: Kuogee Hsieh @ 2022-01-24 23:17 UTC (permalink / raw)
To: robdclark, sean, swboyd, vkoul, daniel, airlied, agross,
dmitry.baryshkov, bjorn.andersson
Cc: quic_abhinavk, aravindh, quic_khsieh, freedreno, dri-devel,
linux-arm-msm, linux-kernel
Some of DP link compliant test expects to return fail-safe mode
if prefer detailed timing mode can not be supported by mainlink's
lane and rate after link training. Therefore add fail-safe mode
into connector mode list as backup mode. This patch fixes test
case 4.2.2.1.
Changes in v2:
-- add Fixes text string
Fixes: 4b85d405cfe9 ( "drm/msm/dp: reduce link rate if failed at link training 1")
Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
---
drivers/gpu/drm/msm/dp/dp_panel.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c
index 71db10c..f141872 100644
--- a/drivers/gpu/drm/msm/dp/dp_panel.c
+++ b/drivers/gpu/drm/msm/dp/dp_panel.c
@@ -212,6 +212,11 @@ int dp_panel_read_sink_caps(struct dp_panel *dp_panel,
if (drm_add_modes_noedid(connector, 640, 480))
drm_set_preferred_mode(connector, 640, 480);
mutex_unlock(&connector->dev->mode_config.mutex);
+ } else {
+ /* always add fail-safe mode as backup mode */
+ mutex_lock(&connector->dev->mode_config.mutex);
+ drm_add_modes_noedid(connector, 640, 480);
+ mutex_unlock(&connector->dev->mode_config.mutex);
}
if (panel->aux_cfg_update_done) {
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH v2] drm/msm/dp: always add fail-safe mode into connector mode list
2022-01-24 23:17 [PATCH v2] drm/msm/dp: always add fail-safe mode into connector mode list Kuogee Hsieh
@ 2022-02-14 16:41 ` Kuogee Hsieh
2022-02-16 19:32 ` Stephen Boyd
1 sibling, 0 replies; 3+ messages in thread
From: Kuogee Hsieh @ 2022-02-14 16:41 UTC (permalink / raw)
To: robdclark, sean, swboyd, vkoul, daniel, airlied, agross,
dmitry.baryshkov, bjorn.andersson
Cc: quic_abhinavk, aravindh, freedreno, dri-devel, linux-arm-msm,
linux-kernel
Hi Stephen,
Are you have more comments?
On 1/24/2022 3:17 PM, Kuogee Hsieh wrote:
> Some of DP link compliant test expects to return fail-safe mode
> if prefer detailed timing mode can not be supported by mainlink's
> lane and rate after link training. Therefore add fail-safe mode
> into connector mode list as backup mode. This patch fixes test
> case 4.2.2.1.
>
> Changes in v2:
> -- add Fixes text string
>
> Fixes: 4b85d405cfe9 ( "drm/msm/dp: reduce link rate if failed at link training 1")
> Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
> ---
> drivers/gpu/drm/msm/dp/dp_panel.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c
> index 71db10c..f141872 100644
> --- a/drivers/gpu/drm/msm/dp/dp_panel.c
> +++ b/drivers/gpu/drm/msm/dp/dp_panel.c
> @@ -212,6 +212,11 @@ int dp_panel_read_sink_caps(struct dp_panel *dp_panel,
> if (drm_add_modes_noedid(connector, 640, 480))
> drm_set_preferred_mode(connector, 640, 480);
> mutex_unlock(&connector->dev->mode_config.mutex);
> + } else {
> + /* always add fail-safe mode as backup mode */
> + mutex_lock(&connector->dev->mode_config.mutex);
> + drm_add_modes_noedid(connector, 640, 480);
> + mutex_unlock(&connector->dev->mode_config.mutex);
> }
>
> if (panel->aux_cfg_update_done) {
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH v2] drm/msm/dp: always add fail-safe mode into connector mode list
2022-01-24 23:17 [PATCH v2] drm/msm/dp: always add fail-safe mode into connector mode list Kuogee Hsieh
2022-02-14 16:41 ` Kuogee Hsieh
@ 2022-02-16 19:32 ` Stephen Boyd
1 sibling, 0 replies; 3+ messages in thread
From: Stephen Boyd @ 2022-02-16 19:32 UTC (permalink / raw)
To: Kuogee Hsieh, agross, airlied, bjorn.andersson, daniel,
dmitry.baryshkov, robdclark, sean, vkoul
Cc: quic_abhinavk, aravindh, freedreno, dri-devel, linux-arm-msm,
linux-kernel
Quoting Kuogee Hsieh (2022-01-24 15:17:54)
> Some of DP link compliant test expects to return fail-safe mode
> if prefer detailed timing mode can not be supported by mainlink's
> lane and rate after link training. Therefore add fail-safe mode
> into connector mode list as backup mode. This patch fixes test
> case 4.2.2.1.
>
> Changes in v2:
> -- add Fixes text string
>
> Fixes: 4b85d405cfe9 ( "drm/msm/dp: reduce link rate if failed at link training 1")
> Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
> ---
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-02-16 19:32 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2022-01-24 23:17 [PATCH v2] drm/msm/dp: always add fail-safe mode into connector mode list Kuogee Hsieh
2022-02-14 16:41 ` Kuogee Hsieh
2022-02-16 19:32 ` Stephen Boyd
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