Re: [PATCH 14/25] drm/msm/dpu: move stride programming to dpu_hw_sspp_setup_sourceaddress

[Abhinav Kumar <quic_abhinavk@quicinc.com>]

On 2/9/2022 9:25 AM, Dmitry Baryshkov wrote:
> Move stride programming to dpu_hw_sspp_setup_sourceaddress(), so that
> dpu_hw_sspp_setup_rects() programs only source and destination
> rectangles.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

This separation is logically correct, but there is another codepath 
using this.

_dpu_plane_color_fill() calls pdpu->pipe_hw->ops.setup_rects.

So for solid fill, I presume that stride getting programmed is 0 as
there is no buffer to fetch from.

But with this separation, we will miss re-programming stride and it will 
remain at the old value even for solid fil cases?

You might want to add setup_sourceaddress call there? But that wont make 
sense either because for solid fill there is nothing to fetch from.

Perhaps, another op for stride programming then?


> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c | 57 +++++++++++----------
>   1 file changed, 29 insertions(+), 28 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c
> index 7194c14f87bc..2186506e6315 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c
> @@ -447,7 +447,7 @@ static void dpu_hw_sspp_setup_rects(struct dpu_sw_pipe *pipe,
>   {
>   	struct dpu_hw_pipe *ctx = pipe->sspp;
>   	struct dpu_hw_blk_reg_map *c;
> -	u32 src_size, src_xy, dst_size, dst_xy, ystride0, ystride1;
> +	u32 src_size, src_xy, dst_size, dst_xy;
>   	u32 src_size_off, src_xy_off, out_size_off, out_xy_off;
>   	u32 idx;
>   
> @@ -478,44 +478,18 @@ static void dpu_hw_sspp_setup_rects(struct dpu_sw_pipe *pipe,
>   	dst_size = (drm_rect_height(&cfg->dst_rect) << 16) |
>   		drm_rect_width(&cfg->dst_rect);
>   
> -	if (pipe->multirect_index == DPU_SSPP_RECT_SOLO) {
> -		ystride0 = (cfg->layout.plane_pitch[0]) |
> -			(cfg->layout.plane_pitch[1] << 16);
> -		ystride1 = (cfg->layout.plane_pitch[2]) |
> -			(cfg->layout.plane_pitch[3] << 16);
> -	} else {
> -		ystride0 = DPU_REG_READ(c, SSPP_SRC_YSTRIDE0 + idx);
> -		ystride1 = DPU_REG_READ(c, SSPP_SRC_YSTRIDE1 + idx);
> -
> -		if (pipe->multirect_index == DPU_SSPP_RECT_0) {
> -			ystride0 = (ystride0 & 0xFFFF0000) |
> -				(cfg->layout.plane_pitch[0] & 0x0000FFFF);
> -			ystride1 = (ystride1 & 0xFFFF0000)|
> -				(cfg->layout.plane_pitch[2] & 0x0000FFFF);
> -		} else {
> -			ystride0 = (ystride0 & 0x0000FFFF) |
> -				((cfg->layout.plane_pitch[0] << 16) &
> -				 0xFFFF0000);
> -			ystride1 = (ystride1 & 0x0000FFFF) |
> -				((cfg->layout.plane_pitch[2] << 16) &
> -				 0xFFFF0000);
> -		}
> -	}
> -
>   	/* rectangle register programming */
>   	DPU_REG_WRITE(c, src_size_off + idx, src_size);
>   	DPU_REG_WRITE(c, src_xy_off + idx, src_xy);
>   	DPU_REG_WRITE(c, out_size_off + idx, dst_size);
>   	DPU_REG_WRITE(c, out_xy_off + idx, dst_xy);
> -
> -	DPU_REG_WRITE(c, SSPP_SRC_YSTRIDE0 + idx, ystride0);
> -	DPU_REG_WRITE(c, SSPP_SRC_YSTRIDE1 + idx, ystride1);
>   }
>   
>   static void dpu_hw_sspp_setup_sourceaddress(struct dpu_sw_pipe *pipe,
>   		struct dpu_hw_pipe_cfg *cfg)
>   {
>   	struct dpu_hw_pipe *ctx = pipe->sspp;
> +	u32 ystride0, ystride1;
>   	int i;
>   	u32 idx;
>   
> @@ -537,6 +511,33 @@ static void dpu_hw_sspp_setup_sourceaddress(struct dpu_sw_pipe *pipe,
>   		DPU_REG_WRITE(&ctx->hw, SSPP_SRC3_ADDR + idx,
>   				cfg->layout.plane_addr[2]);
>   	}
> +
> +	if (pipe->multirect_index == DPU_SSPP_RECT_SOLO) {
> +		ystride0 = (cfg->layout.plane_pitch[0]) |
> +			(cfg->layout.plane_pitch[1] << 16);
> +		ystride1 = (cfg->layout.plane_pitch[2]) |
> +			(cfg->layout.plane_pitch[3] << 16);
> +	} else {
> +		ystride0 = DPU_REG_READ(&ctx->hw, SSPP_SRC_YSTRIDE0 + idx);
> +		ystride1 = DPU_REG_READ(&ctx->hw, SSPP_SRC_YSTRIDE1 + idx);
> +
> +		if (pipe->multirect_index == DPU_SSPP_RECT_0) {
> +			ystride0 = (ystride0 & 0xFFFF0000) |
> +				(cfg->layout.plane_pitch[0] & 0x0000FFFF);
> +			ystride1 = (ystride1 & 0xFFFF0000)|
> +				(cfg->layout.plane_pitch[2] & 0x0000FFFF);
> +		} else {
> +			ystride0 = (ystride0 & 0x0000FFFF) |
> +				((cfg->layout.plane_pitch[0] << 16) &
> +				 0xFFFF0000);
> +			ystride1 = (ystride1 & 0x0000FFFF) |
> +				((cfg->layout.plane_pitch[2] << 16) &
> +				 0xFFFF0000);
> +		}
> +	}
> +
> +	DPU_REG_WRITE(&ctx->hw, SSPP_SRC_YSTRIDE0 + idx, ystride0);
> +	DPU_REG_WRITE(&ctx->hw, SSPP_SRC_YSTRIDE1 + idx, ystride1);
>   }
>   
>   static void dpu_hw_sspp_setup_csc(struct dpu_hw_pipe *ctx,