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Subject[PATCH AUTOSEL 4.19 004/191] media: vsp1: Fix YCbCr planar formats pitch calculation
Date
From: Koji Matsuoka <koji.matsuoka.xm@renesas.com>

[ Upstream commit 9b2798d5b71c50f64c41a40f0cbcae47c3fbd067 ]

YCbCr planar formats can have different pitch values for the luma and
chroma planes. This isn't taken into account in the driver. Fix it.

Based on a BSP patch from Koji Matsuoka <koji.matsuoka.xm@renesas.com>.

Fixes: 7863ac504bc5 ("drm: rcar-du: Add tri-planar memory formats support")
[Updated documentation of the struct vsp1_du_atomic_config pitch field]

Signed-off-by: Koji Matsuoka <koji.matsuoka.xm@renesas.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/platform/vsp1/vsp1_drm.c | 11 ++++++++++-
include/media/vsp1.h | 2 +-
2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/vsp1/vsp1_drm.c b/drivers/media/platform/vsp1/vsp1_drm.c
index b9c0f695d002b..8d86f618ec776 100644
--- a/drivers/media/platform/vsp1/vsp1_drm.c
+++ b/drivers/media/platform/vsp1/vsp1_drm.c
@@ -770,6 +770,7 @@ int vsp1_du_atomic_update(struct device *dev, unsigned int pipe_index,
struct vsp1_device *vsp1 = dev_get_drvdata(dev);
struct vsp1_drm_pipeline *drm_pipe = &vsp1->drm->pipe[pipe_index];
const struct vsp1_format_info *fmtinfo;
+ unsigned int chroma_hsub;
struct vsp1_rwpf *rpf;

if (rpf_index >= vsp1->info->rpf_count)
@@ -810,10 +811,18 @@ int vsp1_du_atomic_update(struct device *dev, unsigned int pipe_index,
return -EINVAL;
}

+ /*
+ * Only formats with three planes can affect the chroma planes pitch.
+ * All formats with two planes have a horizontal subsampling value of 2,
+ * but combine U and V in a single chroma plane, which thus results in
+ * the luma plane and chroma plane having the same pitch.
+ */
+ chroma_hsub = (fmtinfo->planes == 3) ? fmtinfo->hsub : 1;
+
rpf->fmtinfo = fmtinfo;
rpf->format.num_planes = fmtinfo->planes;
rpf->format.plane_fmt[0].bytesperline = cfg->pitch;
- rpf->format.plane_fmt[1].bytesperline = cfg->pitch;
+ rpf->format.plane_fmt[1].bytesperline = cfg->pitch / chroma_hsub;
rpf->alpha = cfg->alpha;

rpf->mem.addr[0] = cfg->mem[0];
diff --git a/include/media/vsp1.h b/include/media/vsp1.h
index 3093b9cb9067e..5b383d01c84a0 100644
--- a/include/media/vsp1.h
+++ b/include/media/vsp1.h
@@ -46,7 +46,7 @@ int vsp1_du_setup_lif(struct device *dev, unsigned int pipe_index,
/**
* struct vsp1_du_atomic_config - VSP atomic configuration parameters
* @pixelformat: plane pixel format (V4L2 4CC)
- * @pitch: line pitch in bytes, for all planes
+ * @pitch: line pitch in bytes for the first plane
* @mem: DMA memory address for each plane of the frame buffer
* @src: source rectangle in the frame buffer (integer coordinates)
* @dst: destination rectangle on the display (integer coordinates)
--
2.20.1
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