drm: Remove plane hsub/vsub alignment requirement for core helpers
The drm_format_info_plane_{height,width} functions was implemented using regular division for the plane size calculation, which cause issues [1][2] when used on contexts where the dimensions are misaligned with relation to the subsampling factors. So, replace the regular division by the DIV_ROUND_UP macro. This allows these functions to be used in more drivers, making further work to bring more core presence on them possible. [1] http://patchwork.freedesktop.org/patch/msgid/20170321181218.10042-3-ville.syrjala@linux.intel.com [2] https://patchwork.freedesktop.org/patch/msgid/20211026225105.2783797-2-imre.deak@intel.com Signed-off-by: Carlos Eduardo Gallo Filho <gcarlos@disroot.org> Reviewed-by: André Almeida <andrealmeid@igalia.com> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20230926141519.9315-2-gcarlos@disroot.org
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@ -22,6 +22,7 @@
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#ifndef __DRM_FOURCC_H__
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#define __DRM_FOURCC_H__
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#include <linux/math.h>
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#include <linux/types.h>
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#include <uapi/drm/drm_fourcc.h>
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@ -279,7 +280,7 @@ int drm_format_info_plane_width(const struct drm_format_info *info, int width,
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if (plane == 0)
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return width;
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return width / info->hsub;
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return DIV_ROUND_UP(width, info->hsub);
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}
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/**
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@ -301,7 +302,7 @@ int drm_format_info_plane_height(const struct drm_format_info *info, int height,
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if (plane == 0)
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return height;
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return height / info->vsub;
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return DIV_ROUND_UP(height, info->vsub);
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}
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const struct drm_format_info *__drm_format_info(u32 format);
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