Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/rockchip: 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 to a multiple of 64.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Cc: Sandy Huang <hjc@rock-chips.com>
Cc: "Heiko Stübner" <heiko@sntech.de>
Cc: Andy Yan <andy.yan@rock-chips.com>
Link: https://lore.kernel.org/r/20250821081918.79786-20-tzimmermann@suse.de
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drivers/gpu/drm/rockchip/rockchip_drm_gem.c
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drivers/gpu/drm/rockchip/rockchip_drm_gem.c
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#include <linux/vmalloc.h>
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#include <drm/drm.h>
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#include <drm/drm_dumb_buffers.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_gem.h>
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#include <drm/drm_gem_dma_helper.h>
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struct drm_mode_create_dumb *args)
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{
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struct rockchip_gem_object *rk_obj;
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int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
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int ret;
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/*
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* align to 64 bytes since Mali requires it.
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*/
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args->pitch = ALIGN(min_pitch, 64);
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args->size = args->pitch * args->height;
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/* 64-byte alignment required by Mali */
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ret = drm_mode_size_dumb(dev, args, SZ_64, 0);
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if (ret)
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return ret;
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rk_obj = rockchip_gem_create_with_handle(file_priv, dev, args->size,
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&args->handle);