linux-kernel - [PATCH v5 03/12] drm/msm/dpu: take plane rotation into account for wide planes

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Message-Id: <20240627-dpu-virtual-wide-v5-3-5efb90cbb8be@linaro.org>
Date: Thu, 27 Jun 2024 00:45:57 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Rob Clark <robdclark@...il.com>, 
 Abhinav Kumar <quic_abhinavk@...cinc.com>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, Sean Paul <sean@...rly.run>, 
 Marijn Suijten <marijn.suijten@...ainline.org>, 
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
 freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH v5 03/12] drm/msm/dpu: take plane rotation into account for
 wide planes

Take into account the plane rotation and flipping when calculating src
positions for the wide plane parts.

This is not an issue yet, because rotation is only supported for the
UBWC planes and wide UBWC planes are rejected anyway because in parallel
multirect case only the half of the usual width is supported for tiled
formats. However it's better to fix this now rather than stumbling upon
it later.

Fixes: 80e8ae3b38ab ("drm/msm/dpu: add support for wide planes")
Reviewed-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index 148bd79bdcef..8f2759d16247 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -862,6 +862,10 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
 
 	max_linewidth = pdpu->catalog->caps->max_linewidth;
 
+	drm_rect_rotate(&pipe_cfg->src_rect,
+			new_plane_state->fb->width, new_plane_state->fb->height,
+			new_plane_state->rotation);
+
 	if ((drm_rect_width(&pipe_cfg->src_rect) > max_linewidth) ||
 	     _dpu_plane_calc_clk(&crtc_state->adjusted_mode, pipe_cfg) > max_mdp_clk_rate) {
 		/*
@@ -911,6 +915,14 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
 		r_pipe_cfg->dst_rect.x1 = pipe_cfg->dst_rect.x2;
 	}
 
+	drm_rect_rotate_inv(&pipe_cfg->src_rect,
+			    new_plane_state->fb->width, new_plane_state->fb->height,
+			    new_plane_state->rotation);
+	if (r_pipe->sspp)
+		drm_rect_rotate_inv(&r_pipe_cfg->src_rect,
+				    new_plane_state->fb->width, new_plane_state->fb->height,
+				    new_plane_state->rotation);
+
 	ret = dpu_plane_atomic_check_pipe(pdpu, pipe, pipe_cfg, fmt, &crtc_state->adjusted_mode);
 	if (ret)
 		return ret;

-- 
2.39.2