* [PATCH] drm/msm/dpu: limit writeback modes according to max_linewidth
@ 2022-05-13 22:59 Abhinav Kumar
2022-05-13 23:02 ` Jessica Zhang
2022-05-18 19:20 ` Dmitry Baryshkov
0 siblings, 2 replies; 3+ messages in thread
From: Abhinav Kumar @ 2022-05-13 22:59 UTC (permalink / raw)
To: freedreno
Cc: Abhinav Kumar, dri-devel, swboyd, seanpaul, dmitry.baryshkov,
quic_jesszhan, quic_aravindh, quic_khsieh
Writeback modes were being added according to mode_config.max_width
but this is assigned to double of max_mixer_width.
For compositors/clients using a single SSPP, this will fail
the dpu_plane's atomic check as it checks for max_linewidth.
Limit writeback modes according to max_linewidth to allow
even compositors/clients which use only a single SSPP to
use writeback.
Fixes: 77b001acdcfeb ("drm/msm/dpu: add the writeback connector layer")
Reported-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
index 7620ffe55779..399115e4e217 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
@@ -8,8 +8,10 @@
static int dpu_wb_conn_get_modes(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
+ struct msm_drm_private *priv = dev->dev_private;
+ struct dpu_kms *dpu_kms = to_dpu_kms(priv->kms);
- return drm_add_modes_noedid(connector, dev->mode_config.max_width,
+ return drm_add_modes_noedid(connector, dpu_kms->catalog->caps->max_linewidth,
dev->mode_config.max_height);
}
--
2.35.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] drm/msm/dpu: limit writeback modes according to max_linewidth
2022-05-13 22:59 [PATCH] drm/msm/dpu: limit writeback modes according to max_linewidth Abhinav Kumar
@ 2022-05-13 23:02 ` Jessica Zhang
2022-05-18 19:20 ` Dmitry Baryshkov
1 sibling, 0 replies; 3+ messages in thread
From: Jessica Zhang @ 2022-05-13 23:02 UTC (permalink / raw)
To: Abhinav Kumar, freedreno
Cc: dri-devel, swboyd, seanpaul, dmitry.baryshkov, quic_aravindh,
quic_khsieh
On 5/13/2022 3:59 PM, Abhinav Kumar wrote:
> Writeback modes were being added according to mode_config.max_width
> but this is assigned to double of max_mixer_width.
>
> For compositors/clients using a single SSPP, this will fail
> the dpu_plane's atomic check as it checks for max_linewidth.
>
> Limit writeback modes according to max_linewidth to allow
> even compositors/clients which use only a single SSPP to
> use writeback.
>
> Fixes: 77b001acdcfeb ("drm/msm/dpu: add the writeback connector layer")
> Reported-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Tested-by: Jessica Zhang <quic_jesszhan@quicinc.com> # Trogdor (SC8170)
> Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
> ---
> drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
> index 7620ffe55779..399115e4e217 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
> @@ -8,8 +8,10 @@
> static int dpu_wb_conn_get_modes(struct drm_connector *connector)
> {
> struct drm_device *dev = connector->dev;
> + struct msm_drm_private *priv = dev->dev_private;
> + struct dpu_kms *dpu_kms = to_dpu_kms(priv->kms);
>
> - return drm_add_modes_noedid(connector, dev->mode_config.max_width,
> + return drm_add_modes_noedid(connector, dpu_kms->catalog->caps->max_linewidth,
> dev->mode_config.max_height);
> }
>
> --
> 2.35.1
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] drm/msm/dpu: limit writeback modes according to max_linewidth
2022-05-13 22:59 [PATCH] drm/msm/dpu: limit writeback modes according to max_linewidth Abhinav Kumar
2022-05-13 23:02 ` Jessica Zhang
@ 2022-05-18 19:20 ` Dmitry Baryshkov
1 sibling, 0 replies; 3+ messages in thread
From: Dmitry Baryshkov @ 2022-05-18 19:20 UTC (permalink / raw)
To: Abhinav Kumar, freedreno
Cc: dri-devel, swboyd, seanpaul, quic_jesszhan, quic_aravindh, quic_khsieh
On 14/05/2022 01:59, Abhinav Kumar wrote:
> Writeback modes were being added according to mode_config.max_width
> but this is assigned to double of max_mixer_width.
>
> For compositors/clients using a single SSPP, this will fail
> the dpu_plane's atomic check as it checks for max_linewidth.
>
> Limit writeback modes according to max_linewidth to allow
> even compositors/clients which use only a single SSPP to
> use writeback.
>
> Fixes: 77b001acdcfeb ("drm/msm/dpu: add the writeback connector layer")
> Reported-by: Jessica Zhang <quic_jesszhan@quicinc.com>
> Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
> drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
> index 7620ffe55779..399115e4e217 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
> @@ -8,8 +8,10 @@
> static int dpu_wb_conn_get_modes(struct drm_connector *connector)
> {
> struct drm_device *dev = connector->dev;
> + struct msm_drm_private *priv = dev->dev_private;
> + struct dpu_kms *dpu_kms = to_dpu_kms(priv->kms);
>
> - return drm_add_modes_noedid(connector, dev->mode_config.max_width,
> + return drm_add_modes_noedid(connector, dpu_kms->catalog->caps->max_linewidth,
> dev->mode_config.max_height);
> }
>
--
With best wishes
Dmitry
^ permalink raw reply [flat|nested] 3+ messages in thread
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2022-05-13 22:59 [PATCH] drm/msm/dpu: limit writeback modes according to max_linewidth Abhinav Kumar
2022-05-13 23:02 ` Jessica Zhang
2022-05-18 19:20 ` Dmitry Baryshkov
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