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[PATCH 1/4] drm/msm/dp: Update msm_dp_controller IDs for sa8775p

Mani Chandana Ballary Kuntumalla posted 4 patches 4 months, 2 weeks ago
There is a newer version of this series
[PATCH 1/4] drm/msm/dp: Update msm_dp_controller IDs for sa8775p
Posted by Mani Chandana Ballary Kuntumalla 4 months, 2 weeks ago 
The Qualcomm SA8775P platform comes with 2 DisplayPort controllers
for each mdss. Update controller id for DPTX0 and DPTX1 of mdss1.

Signed-off-by: Mani Chandana Ballary Kuntumalla <quic_mkuntuma@quicinc.com>
---
 drivers/gpu/drm/msm/dp/dp_display.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index d87d47cc7ec3..f247aad55397 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -133,8 +133,8 @@ struct msm_dp_desc {
 static const struct msm_dp_desc msm_dp_desc_sa8775p[] = {
 	{ .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
 	{ .io_start = 0x0af5c000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
-	{ .io_start = 0x22154000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
-	{ .io_start = 0x2215c000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true },
+	{ .io_start = 0x22154000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
+	{ .io_start = 0x2215c000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
 	{}
 };
 
-- 
2.34.1
Re: [PATCH 1/4] drm/msm/dp: Update msm_dp_controller IDs for sa8775p
Posted by Dmitry Baryshkov 4 months, 2 weeks ago 
On Fri, Sep 26, 2025 at 02:29:53PM +0530, Mani Chandana Ballary Kuntumalla wrote:
> The Qualcomm SA8775P platform comes with 2 DisplayPort controllers
> for each mdss. Update controller id for DPTX0 and DPTX1 of mdss1.
> 
> Signed-off-by: Mani Chandana Ballary Kuntumalla <quic_mkuntuma@quicinc.com>
> ---
>  drivers/gpu/drm/msm/dp/dp_display.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Missing Fixes tag.

> 
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index d87d47cc7ec3..f247aad55397 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -133,8 +133,8 @@ struct msm_dp_desc {
>  static const struct msm_dp_desc msm_dp_desc_sa8775p[] = {
>  	{ .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
>  	{ .io_start = 0x0af5c000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
> -	{ .io_start = 0x22154000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
> -	{ .io_start = 0x2215c000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true },
> +	{ .io_start = 0x22154000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
> +	{ .io_start = 0x2215c000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
>  	{}
>  };
>  
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry
Re: [PATCH 1/4] drm/msm/dp: Update msm_dp_controller IDs for sa8775p
Posted by Mani Chandana Kuntumalla 2 months, 3 weeks ago 

On 9/26/2025 7:21 PM, Dmitry Baryshkov wrote:
> On Fri, Sep 26, 2025 at 02:29:53PM +0530, Mani Chandana Ballary Kuntumalla wrote:
>> The Qualcomm SA8775P platform comes with 2 DisplayPort controllers
>> for each mdss. Update controller id for DPTX0 and DPTX1 of mdss1.
>>
>> Signed-off-by: Mani Chandana Ballary Kuntumalla <quic_mkuntuma@quicinc.com>
>> ---
>>   drivers/gpu/drm/msm/dp/dp_display.c | 4 ++--
>>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> Missing Fixes tag.
> 

Sure.
Re: [PATCH 1/4] drm/msm/dp: Update msm_dp_controller IDs for sa8775p
Posted by Konrad Dybcio 4 months, 2 weeks ago 
On 9/26/25 10:59 AM, Mani Chandana Ballary Kuntumalla wrote:
> The Qualcomm SA8775P platform comes with 2 DisplayPort controllers
> for each mdss. Update controller id for DPTX0 and DPTX1 of mdss1.
> 
> Signed-off-by: Mani Chandana Ballary Kuntumalla <quic_mkuntuma@quicinc.com>
> ---
>  drivers/gpu/drm/msm/dp/dp_display.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index d87d47cc7ec3..f247aad55397 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -133,8 +133,8 @@ struct msm_dp_desc {
>  static const struct msm_dp_desc msm_dp_desc_sa8775p[] = {
>  	{ .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
>  	{ .io_start = 0x0af5c000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
> -	{ .io_start = 0x22154000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
> -	{ .io_start = 0x2215c000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true },
> +	{ .io_start = 0x22154000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
> +	{ .io_start = 0x2215c000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },

Well, did you see what happens when you try to plug in a display
to a controller on MDSS0 and MDSS1 at once now?

(memory corruption)

Konrad
Re: [PATCH 1/4] drm/msm/dp: Update msm_dp_controller IDs for sa8775p
Posted by Konrad Dybcio 4 months, 2 weeks ago 
On 9/26/25 1:18 PM, Konrad Dybcio wrote:
> On 9/26/25 10:59 AM, Mani Chandana Ballary Kuntumalla wrote:
>> The Qualcomm SA8775P platform comes with 2 DisplayPort controllers
>> for each mdss. Update controller id for DPTX0 and DPTX1 of mdss1.
>>
>> Signed-off-by: Mani Chandana Ballary Kuntumalla <quic_mkuntuma@quicinc.com>
>> ---
>>  drivers/gpu/drm/msm/dp/dp_display.c | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
>> index d87d47cc7ec3..f247aad55397 100644
>> --- a/drivers/gpu/drm/msm/dp/dp_display.c
>> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
>> @@ -133,8 +133,8 @@ struct msm_dp_desc {
>>  static const struct msm_dp_desc msm_dp_desc_sa8775p[] = {
>>  	{ .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
>>  	{ .io_start = 0x0af5c000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
>> -	{ .io_start = 0x22154000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true },
>> -	{ .io_start = 0x2215c000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true },
>> +	{ .io_start = 0x22154000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
>> +	{ .io_start = 0x2215c000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
> 
> Well, did you see what happens when you try to plug in a display
> to a controller on MDSS0 and MDSS1 at once now?
> 
> (memory corruption)

No, my bad. I misread the code

Konrad

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