Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/renesas/rcar-du: Compute dumb-buffer sizes with drm_mode_size_dumb()
Call drm_mode_size_dumb() to compute dumb-buffer scanline pitch and
buffer size. Align the pitch according to hardware requirements.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
Link: https://lore.kernel.org/r/20250821081918.79786-18-tzimmermann@suse.de
+5
-2
+5
-2
drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c
+5
-2
drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c
···
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11
#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_device.h>
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+
#include <drm/drm_dumb_buffers.h>
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#include <drm/drm_framebuffer.h>
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#include <drm/drm_gem_dma_helper.h>
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#include <drm/drm_gem_framebuffer_helper.h>
···
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struct drm_mode_create_dumb *args)
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{
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struct rcar_du_device *rcdu = to_rcar_du_device(dev);
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-
unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
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unsigned int align;
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+
int ret;
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/*
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* The R8A7779 DU requires a 16 pixels pitch alignment as documented,
···
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else
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align = 16 * args->bpp / 8;
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-
args->pitch = roundup(min_pitch, align);
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ret = drm_mode_size_dumb(dev, args, align, 0);
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if (ret)
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+
return ret;
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return drm_gem_dma_dumb_create_internal(file, dev, args);
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}