linux-kernel - Re: [PATCH 1/2] drm/msm/dpu: drop unused dpu

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Message-ID: <8a079ca6-8476-134d-966a-831348895349@quicinc.com>
Date: Mon, 4 Mar 2024 10:07:04 -0800
From: Abhinav Kumar <quic_abhinavk@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC: <freedreno@...ts.freedesktop.org>, Rob Clark <robdclark@...il.com>,
        "Sean
 Paul" <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        "David Airlie" <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        <dri-devel@...ts.freedesktop.org>, <quic_parellan@...cinc.com>,
        <quic_jesszhan@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] drm/msm/dpu: drop unused dpu_kms from interface
 initialization



On 3/4/2024 5:06 AM, Dmitry Baryshkov wrote:
> On Wed, 28 Feb 2024 at 21:47, Abhinav Kumar <quic_abhinavk@...cinc.com> wrote:
>>
>> dpu_kms seems unused while initializing DSI, HDMI and DP through
>> their respective _dpu_kms_initialize_* functions.
>>
>> Hence lets drop the parameter altogether.
>>
>> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
>> ---
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 15 ++++++---------
>>   1 file changed, 6 insertions(+), 9 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
>> index 2af62d8fa9a7..ab924ac78c9b 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
>> @@ -494,8 +494,7 @@ static void dpu_kms_wait_flush(struct msm_kms *kms, unsigned crtc_mask)
>>   }
>>
>>   static int _dpu_kms_initialize_dsi(struct drm_device *dev,
>> -                                   struct msm_drm_private *priv,
>> -                                   struct dpu_kms *dpu_kms)
>> +                                  struct msm_drm_private *priv)
>>   {
>>          struct drm_encoder *encoder = NULL;
>>          struct msm_display_info info;
>> @@ -558,8 +557,7 @@ static int _dpu_kms_initialize_dsi(struct drm_device *dev,
>>   }
>>
>>   static int _dpu_kms_initialize_displayport(struct drm_device *dev,
>> -                                           struct msm_drm_private *priv,
>> -                                           struct dpu_kms *dpu_kms)
>> +                                          struct msm_drm_private *priv)
> 
> This breaks now on top of YUV patchset:
> 
> drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c: In function
> '_dpu_kms_initialize_displayport':
> drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c:583:35: error: 'dpu_kms'
> undeclared (first use in this function)
> 583 | yuv_supported = !!dpu_kms->catalog->cdm;
> 
> As this requires adding of the yuv_supported argument, let's consider
> moving it backwards: for  _dpu_kms_initialize_writeback() we can get
> format_list and n_formats from the dpu_kms.
> 

Yes, my bad, I realized after sending this that my branch did not have 
CDM changes yet.

Let me rework and post this on top of the latest tree.

> 
>>   {
>>          struct drm_encoder *encoder = NULL;
>>          struct msm_display_info info;
>> @@ -592,8 +590,7 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev,
>>   }
>>
>>   static int _dpu_kms_initialize_hdmi(struct drm_device *dev,
>> -                                   struct msm_drm_private *priv,
>> -                                   struct dpu_kms *dpu_kms)
>> +                                   struct msm_drm_private *priv)
>>   {
>>          struct drm_encoder *encoder = NULL;
>>          struct msm_display_info info;
>> @@ -671,19 +668,19 @@ static int _dpu_kms_setup_displays(struct drm_device *dev,
>>          int rc = 0;
>>          int i;
>>
>> -       rc = _dpu_kms_initialize_dsi(dev, priv, dpu_kms);
>> +       rc = _dpu_kms_initialize_dsi(dev, priv);
>>          if (rc) {
>>                  DPU_ERROR("initialize_dsi failed, rc = %d\n", rc);
>>                  return rc;
>>          }
>>
>> -       rc = _dpu_kms_initialize_displayport(dev, priv, dpu_kms);
>> +       rc = _dpu_kms_initialize_displayport(dev, priv);
>>          if (rc) {
>>                  DPU_ERROR("initialize_DP failed, rc = %d\n", rc);
>>                  return rc;
>>          }
>>
>> -       rc = _dpu_kms_initialize_hdmi(dev, priv, dpu_kms);
>> +       rc = _dpu_kms_initialize_hdmi(dev, priv);
>>          if (rc) {
>>                  DPU_ERROR("initialize HDMI failed, rc = %d\n", rc);
>>                  return rc;
>> --
>> 2.34.1
>>
> 
> 
> --
> With best wishes
> Dmitry