[PATCH RFC v4 7/7] drm/msm/dpu: Use DRM solid_fill property

[Jessica Zhang]

On 6/29/2023 5:59 PM, Dmitry Baryshkov wrote:
> On 30/06/2023 03:25, 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.
>>
>> Signed-off-by: Jessica Zhang <quic_jesszhan at quicinc.com>
> 
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
> 
> Minor suggestion below.
> 
>> ---
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 21 +++++++++++++++------
>>   1 file changed, 15 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 4476722f03bb..11d4fb771a1f 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 +604,17 @@ 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_fill_color(struct drm_solid_fill 
>> solid_fill)
> 
> Please consider accepting drm_plane_state instead and handling alpha 
> here. Then _dpu_color_fill can accept rgba colour instead of separate 
> RGB and alpha values.

Hi Dmitry,

Do you mean adding a patch to refactor _dpu_plane_color_fill() to accept 
an RGBA8888 color?

Since, currently, the `color` parameter gets truncated to a BGR888 value 
and OR'd with the `alpha` parameter [1].

Thanks,

Jessica Zhang

[1] 
https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c#L682

> 
>> +{
>> +    uint32_t ret = 0;
>> +
>> +    ret |= ((uint8_t) solid_fill.b) << 16;
>> +    ret |= ((uint8_t) solid_fill.g) << 8;
>> +    ret |= ((uint8_t) solid_fill.r);
>> +
>> +    return ret;
>> +}
>> +
>>   /**
>>    * _dpu_plane_color_fill - enables color fill on plane
>>    * @pdpu:   Pointer to DPU plane object
>> @@ -977,9 +986,9 @@ 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_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 +1033,7 @@ 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
>