linux-kernel - Re: [PATCH 03/45] drm/msm/dp: fix the intf

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Message-ID: <7fbcdb9e-ab47-49a6-9d82-4238b51feed0@quicinc.com>
Date: Thu, 29 May 2025 18:06:47 +0800
From: Yongxing Mou <quic_yongmou@...cinc.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Abhinav Kumar
	<quic_abhinavk@...cinc.com>
CC: Rob Clark <robdclark@...il.com>,
        Dmitry Baryshkov
	<dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten
	<marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, "Simona
 Vetter" <simona@...ll.ch>,
        Stephen Boyd <swboyd@...omium.org>,
        "Chandan
 Uddaraju" <chandanu@...eaurora.org>,
        Guenter Roeck <groeck@...omium.org>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>,
        Konrad Dybcio
	<konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski
	<krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Vara Reddy
	<quic_varar@...cinc.com>,
        Rob Clark <robdclark@...omium.org>,
        Tanmay Shah
	<tanmay@...eaurora.org>, <linux-arm-msm@...r.kernel.org>,
        <dri-devel@...ts.freedesktop.org>, <freedreno@...ts.freedesktop.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        Jessica Zhang
	<quic_jesszhan@...cinc.com>,
        Laurent Pinchart
	<laurent.pinchart@...asonboard.com>
Subject: Re: [PATCH 03/45] drm/msm/dp: fix the intf_type of MST interfaces



On 2025/1/7 8:55, Bjorn Andersson wrote:
> On Thu, Dec 05, 2024 at 08:31:34PM -0800, Abhinav Kumar wrote:
>> Interface type of MST interfaces is currently INTF_NONE.
>> Fix this to INTF_DP.
>>
> 
> Wouldn't it make sense to introduce this later in the series, once the
> implementation would actually handle this case? Or could/should we have
> left these INTF_DP from the start?
> 
> Regards,
> Bjorn
> 
Yes, it's better to place this patch at the end of the series, once the 
platform is already capable of handling MST.

>> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
>> ---
>>   drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_8_4_sa8775p.h | 8 ++++----
>>   1 file changed, 4 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_8_4_sa8775p.h b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_8_4_sa8775p.h
>> index 907b4d7ceb470b0391d2bbbab3ce520efa2b3263..2509e28e3d6b582cd837c6aea167b3f4ad877383 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_8_4_sa8775p.h
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_8_4_sa8775p.h
>> @@ -375,7 +375,7 @@ static const struct dpu_intf_cfg sa8775p_intf[] = {
>>   		.name = "intf_3", .id = INTF_3,
>>   		.base = 0x37000, .len = 0x280,
>>   		.features = INTF_SC7280_MASK,
>> -		.type = INTF_NONE,
>> +		.type = INTF_DP,
>>   		.controller_id = MSM_DP_CONTROLLER_0,	/* pair with intf_0 for DP MST */
>>   		.prog_fetch_lines_worst_case = 24,
>>   		.intr_underrun = DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR, 30),
>> @@ -393,7 +393,7 @@ static const struct dpu_intf_cfg sa8775p_intf[] = {
>>   		.name = "intf_6", .id = INTF_6,
>>   		.base = 0x3A000, .len = 0x280,
>>   		.features = INTF_SC7280_MASK,
>> -		.type = INTF_NONE,
>> +		.type = INTF_DP,
>>   		.controller_id = MSM_DP_CONTROLLER_0,	/* pair with intf_0 for DP MST */
>>   		.prog_fetch_lines_worst_case = 24,
>>   		.intr_underrun = DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR, 17),
>> @@ -402,7 +402,7 @@ static const struct dpu_intf_cfg sa8775p_intf[] = {
>>   		.name = "intf_7", .id = INTF_7,
>>   		.base = 0x3b000, .len = 0x280,
>>   		.features = INTF_SC7280_MASK,
>> -		.type = INTF_NONE,
>> +		.type = INTF_DP,
>>   		.controller_id = MSM_DP_CONTROLLER_0,	/* pair with intf_0 for DP MST */
>>   		.prog_fetch_lines_worst_case = 24,
>>   		.intr_underrun = DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR, 18),
>> @@ -411,7 +411,7 @@ static const struct dpu_intf_cfg sa8775p_intf[] = {
>>   		.name = "intf_8", .id = INTF_8,
>>   		.base = 0x3c000, .len = 0x280,
>>   		.features = INTF_SC7280_MASK,
>> -		.type = INTF_NONE,
>> +		.type = INTF_DP,
>>   		.controller_id = MSM_DP_CONTROLLER_1,	/* pair with intf_4 for DP MST */
>>   		.prog_fetch_lines_worst_case = 24,
>>   		.intr_underrun = DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR, 12),
>>
>> -- 
>> 2.34.1
>>