linux-kernel - Re: [PATCH 5/5] drm/msm/dp: Add DisplayPort controller for SA8775P

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Message-ID: <a44a6f08-1f4a-4e5c-a4e4-30ab65c467f7@quicinc.com>
Date: Thu, 12 Sep 2024 15:34:05 +0530
From: Soutrik Mukhopadhyay <quic_mukhopad@...cinc.com>
To: Bjorn Andersson <quic_bjorande@...cinc.com>
CC: <vkoul@...nel.org>, <kishon@...nel.org>, <konradybcio@...nel.org>,
        <andersson@...nel.org>, <simona@...ll.ch>,
        <dmitry.baryshkov@...aro.org>, <abel.vesa@...aro.org>,
        <robdclark@...il.com>, <quic_abhinavk@...cinc.com>, <sean@...rly.run>,
        <marijn.suijten@...ainline.org>, <airlied@...il.com>,
        <daniel@...ll.ch>, <maarten.lankhorst@...ux.intel.com>,
        <mripard@...nel.org>, <tzimmermann@...e.de>, <robh@...nel.org>,
        <krzk+dt@...nel.org>, <conor+dt@...nel.org>, <quic_khsieh@...cinc.com>,
        <konrad.dybcio@...aro.org>, <quic_parellan@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <linux-phy@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <quic_riteshk@...cinc.com>, <quic_vproddut@...cinc.com>
Subject: Re: [PATCH 5/5] drm/msm/dp: Add DisplayPort controller for SA8775P


On 9/12/2024 1:32 AM, Bjorn Andersson wrote:
> On Wed, Sep 11, 2024 at 03:38:13PM +0530, Soutrik Mukhopadhyay wrote:
>> The Qualcomm SA8775P platform comes with a DisplayPort controller
>> with a different base offset than the previous SoCs,
>> add support for this in the DisplayPort driver.
>>
>> Signed-off-by: Soutrik Mukhopadhyay <quic_mukhopad@...cinc.com>
>> ---
>>   drivers/gpu/drm/msm/dp/dp_display.c | 7 +++++++
>>   1 file changed, 7 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
>> index e1228fb093ee..e4954fd99eb0 100644
>> --- a/drivers/gpu/drm/msm/dp/dp_display.c
>> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
>> @@ -118,6 +118,12 @@ struct msm_dp_desc {
>>   	bool wide_bus_supported;
>>   };
>>   
>> +static const struct msm_dp_desc sa8775p_dp_descs[] = {
>> +	{ .io_start = 0xaf54000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
>> +	{ .io_start = 0xaf5c000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true },
> Why is this list incomplete?
>
> Regards,
> Bjorn


Do you mean to add for mdss_1 as well?

We only added dp controllers for mdss_0 as we plan to validate and 
enable only these.


>
>> +	{}
>> +};
>> +
>>   static const struct msm_dp_desc sc7180_dp_descs[] = {
>>   	{ .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true },
>>   	{}
>> @@ -162,6 +168,7 @@ static const struct msm_dp_desc x1e80100_dp_descs[] = {
>>   };
>>   
>>   static const struct of_device_id dp_dt_match[] = {
>> +	{ .compatible = "qcom,sa8775p-dp", .data = &sa8775p_dp_descs },
>>   	{ .compatible = "qcom,sc7180-dp", .data = &sc7180_dp_descs },
>>   	{ .compatible = "qcom,sc7280-dp", .data = &sc7280_dp_descs },
>>   	{ .compatible = "qcom,sc7280-edp", .data = &sc7280_dp_descs },
>> -- 
>> 2.17.1
>>