[PATCH v3 13/15] drm/msm/dpu: Support quad-pipe in SSPP checking

[Dmitry Baryshkov]

On Thu, Dec 19, 2024 at 03:49:31PM +0800, Jun Nie wrote:
> Move requreiment check to routine of every pipe check. There will be
> multiple SSPPs for quad-pipe case in future. Only check valid pipe
> as some pipes are for multi-rect or right half of screen that may
> not be used.

This highlights an issue in the current wide planes implelentation.
Please move this to the top of the series, provide a proper commit
message, describing the issue, and add a proper Fixes tag.

> 
> Signed-off-by: Jun Nie <jun.nie at linaro.org>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 86 +++++++++++++++----------------
>  1 file changed, 42 insertions(+), 44 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> index fca6e609898a6..1cd98892898a4 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> @@ -730,12 +730,40 @@ static int dpu_plane_check_inline_rotation(struct dpu_plane *pdpu,
>  static int dpu_plane_atomic_check_pipe(struct dpu_plane *pdpu,
>  		struct dpu_sw_pipe *pipe,
>  		struct dpu_sw_pipe_cfg *pipe_cfg,
> -		const struct msm_format *fmt,
> -		const struct drm_display_mode *mode)
> +		const struct drm_display_mode *mode,
> +		struct drm_plane_state *new_plane_state)
>  {
>  	uint32_t min_src_size;
>  	struct dpu_kms *kms = _dpu_plane_get_kms(&pdpu->base);
>  	int ret;
> +	const struct msm_format *fmt;
> +	uint32_t supported_rotations;
> +	const struct dpu_sspp_cfg *pipe_hw_caps;
> +	const struct dpu_sspp_sub_blks *sblk;
> +
> +	pipe_hw_caps = pipe->sspp->cap;
> +	sblk = pipe->sspp->cap->sblk;
> +
> +	/*
> +	 * We already have verified scaling against platform limitations.
> +	 * Now check if the SSPP supports scaling at all.
> +	 */
> +	if (!sblk->scaler_blk.len &&
> +	    ((drm_rect_width(&new_plane_state->src) >> 16 !=
> +	      drm_rect_width(&new_plane_state->dst)) ||
> +	     (drm_rect_height(&new_plane_state->src) >> 16 !=
> +	      drm_rect_height(&new_plane_state->dst))))
> +		return -ERANGE;
> +
> +	fmt = msm_framebuffer_format(new_plane_state->fb);
> +
> +	supported_rotations = DRM_MODE_REFLECT_MASK | DRM_MODE_ROTATE_0;
> +
> +	if (pipe_hw_caps->features & BIT(DPU_SSPP_INLINE_ROTATION))
> +		supported_rotations |= DRM_MODE_ROTATE_90;
> +
> +	pipe_cfg->rotation = drm_rotation_simplify(new_plane_state->rotation,
> +						   supported_rotations);
>  
>  	min_src_size = MSM_FORMAT_IS_YUV(fmt) ? 2 : 1;
>  
> @@ -981,49 +1009,19 @@ static int dpu_plane_atomic_check_sspp(struct drm_plane *plane,
>  		drm_atomic_get_new_plane_state(state, plane);
>  	struct dpu_plane *pdpu = to_dpu_plane(plane);
>  	struct dpu_plane_state *pstate = to_dpu_plane_state(new_plane_state);
> -	const struct msm_format *fmt;
> -	struct dpu_sw_pipe *pipe = &pstate->pipe[0];
> -	struct dpu_sw_pipe *r_pipe = &pstate->pipe[1];
> -	struct dpu_sw_pipe_cfg *pipe_cfg = &pstate->pipe_cfg[0];
> -	struct dpu_sw_pipe_cfg *r_pipe_cfg = &pstate->pipe_cfg[1];
> -	uint32_t supported_rotations;
> -	const struct dpu_sspp_cfg *pipe_hw_caps;
> -	const struct dpu_sspp_sub_blks *sblk;
> -	int ret = 0;
> -
> -	pipe_hw_caps = pipe->sspp->cap;
> -	sblk = pipe->sspp->cap->sblk;
> -
> -	/*
> -	 * We already have verified scaling against platform limitations.
> -	 * Now check if the SSPP supports scaling at all.
> -	 */
> -	if (!sblk->scaler_blk.len &&
> -	    ((drm_rect_width(&new_plane_state->src) >> 16 !=
> -	      drm_rect_width(&new_plane_state->dst)) ||
> -	     (drm_rect_height(&new_plane_state->src) >> 16 !=
> -	      drm_rect_height(&new_plane_state->dst))))
> -		return -ERANGE;
> -
> -	fmt = msm_framebuffer_format(new_plane_state->fb);
> -
> -	supported_rotations = DRM_MODE_REFLECT_MASK | DRM_MODE_ROTATE_0;
> -
> -	if (pipe_hw_caps->features & BIT(DPU_SSPP_INLINE_ROTATION))
> -		supported_rotations |= DRM_MODE_ROTATE_90;
> -
> -	pipe_cfg->rotation = drm_rotation_simplify(new_plane_state->rotation,
> -						   supported_rotations);
> -	r_pipe_cfg->rotation = pipe_cfg->rotation;
> -
> -	ret = dpu_plane_atomic_check_pipe(pdpu, pipe, pipe_cfg, fmt,
> -					  &crtc_state->adjusted_mode);
> -	if (ret)
> -		return ret;
> +	struct dpu_sw_pipe *pipe;
> +	struct dpu_sw_pipe_cfg *pipe_cfg;
> +	int ret = 0, i;
>  
> -	if (drm_rect_width(&r_pipe_cfg->src_rect) != 0) {
> -		ret = dpu_plane_atomic_check_pipe(pdpu, r_pipe, r_pipe_cfg, fmt,
> -						  &crtc_state->adjusted_mode);
> +	for (i = 0; i < PIPES_PER_PLANE; i++) {
> +		pipe = &pstate->pipe[i];
> +		pipe_cfg = &pstate->pipe_cfg[i];
> +		if (!pipe_cfg->valid || !pipe->sspp)
> +			continue;
> +		DPU_DEBUG_PLANE(pdpu, "pipe %d is in use, validate it\n", i);
> +		ret = dpu_plane_atomic_check_pipe(pdpu, pipe, pipe_cfg,
> +						  &crtc_state->adjusted_mode,
> +						  new_plane_state);
>  		if (ret)
>  			return ret;
>  	}
> 
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry