linux-kernel - Re: [PATCH RFC v5 09/10] drm/msm/dpu: Use DRM solid

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Date:   Mon, 31 Jul 2023 17:39:12 -0700
From:   Jessica Zhang <quic_jesszhan@...cinc.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>
CC:     <quic_abhinavk@...cinc.com>, <ppaalanen@...il.com>,
        <contact@...rsion.fr>, <laurent.pinchart@...asonboard.com>,
        <sebastian.wick@...hat.com>, <ville.syrjala@...ux.intel.com>,
        <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>, <freedreno@...ts.freedesktop.org>,
        <wayland-devel@...ts.freedesktop.org>
Subject: Re: [PATCH RFC v5 09/10] drm/msm/dpu: Use DRM solid_fill property



On 7/30/2023 9:15 PM, Dmitry Baryshkov wrote:
> On 28/07/2023 20:02, Jessica Zhang wrote:
>> Drop DPU_PLANE_COLOR_FILL_FLAG and check the DRM solid_fill property to
>> determine if the plane is solid fill. In addition drop the DPU plane
>> color_fill field as we can now use drm_plane_state.solid_fill instead,
>> and pass in drm_plane_state.alpha to _dpu_plane_color_fill_pipe() to
>> allow userspace to configure the alpha value for the solid fill color.
>>
>> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
>> Signed-off-by: Jessica Zhang <quic_jesszhan@...cinc.com>
>> ---
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 24 ++++++++++++++++++------
>>   1 file changed, 18 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c 
>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
>> index 114c803ff99b..95fc0394d13e 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
>> @@ -42,7 +42,6 @@
>>   #define SHARP_SMOOTH_THR_DEFAULT    8
>>   #define SHARP_NOISE_THR_DEFAULT    2
>> -#define DPU_PLANE_COLOR_FILL_FLAG    BIT(31)
>>   #define DPU_ZPOS_MAX 255
>>   /*
>> @@ -82,7 +81,6 @@ struct dpu_plane {
>>       enum dpu_sspp pipe;
>> -    uint32_t color_fill;
>>       bool is_error;
>>       bool is_rt_pipe;
>>       const struct dpu_mdss_cfg *catalog;
>> @@ -606,6 +604,20 @@ static void _dpu_plane_color_fill_pipe(struct 
>> dpu_plane_state *pstate,
>>       _dpu_plane_setup_scaler(pipe, fmt, true, &pipe_cfg, 
>> pstate->rotation);
>>   }
>> +static uint32_t _dpu_plane_get_bgr_fill_color(struct drm_solid_fill 
>> solid_fill)
> 
> As I commented for v4 (please excuse me for not responding to your email 
> at thattime), we can return abgr here, taking plane->state->alpha into 
> account.

Hi Dmitry,

Since it seems that this comment wasn't resolved, I can drop your R-B 
tag in the next revision.

 From my previous response, I pointed out that the color parameter 
expects an RGB value [1].

So is the intention here to refactor _dpu_plane_color_fill() to accept 
an ABGR8888 color?

Thanks,

Jessica Zhang

[1] 
https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c#L676

> 
>> +{
>> +    uint32_t ret = 0;
>> +    uint8_t b = solid_fill.b >> 24;
>> +    uint8_t g = solid_fill.g >> 24;
>> +    uint8_t r = solid_fill.r >> 24;
>> +
>> +    ret |= b << 16;
>> +    ret |= g << 8;
>> +    ret |= r;
>> +
>> +    return ret;
>> +}
>> +
>>   /**
>>    * _dpu_plane_color_fill - enables color fill on plane
>>    * @pdpu:   Pointer to DPU plane object
>> @@ -977,9 +989,9 @@ void dpu_plane_flush(struct drm_plane *plane)
>>       if (pdpu->is_error)
>>           /* force white frame with 100% alpha pipe output on error */
>>           _dpu_plane_color_fill(pdpu, 0xFFFFFF, 0xFF);
>> -    else if (pdpu->color_fill & DPU_PLANE_COLOR_FILL_FLAG)
>> -        /* force 100% alpha */
>> -        _dpu_plane_color_fill(pdpu, pdpu->color_fill, 0xFF);
>> +    else if (drm_plane_solid_fill_enabled(plane->state))
>> +        _dpu_plane_color_fill(pdpu, 
>> _dpu_plane_get_bgr_fill_color(plane->state->solid_fill),
>> +                plane->state->alpha);
>>       else {
>>           dpu_plane_flush_csc(pdpu, &pstate->pipe);
>>           dpu_plane_flush_csc(pdpu, &pstate->r_pipe);
>> @@ -1024,7 +1036,7 @@ static void dpu_plane_sspp_update_pipe(struct 
>> drm_plane *plane,
>>       }
>>       /* override for color fill */
>> -    if (pdpu->color_fill & DPU_PLANE_COLOR_FILL_FLAG) {
>> +    if (drm_plane_solid_fill_enabled(plane->state)) {
>>           _dpu_plane_set_qos_ctrl(plane, pipe, false);
>>           /* skip remaining processing on color fill */
>>
> 
> -- 
> With best wishes
> Dmitry
>