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drm/sysfb: Provide single mode-init helper

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Merge the mode-init functions of ofdrm and simpledrm to the new helper
drm_sysfb_mode(). Also implement the DPI defaults there. Replace the
code in each driver with the shared helper.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://lore.kernel.org/r/20250401094056.32904-7-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann
2025-04-01 11:37:09 +02:00
parent b5626f6f8f
commit 333376e9cf
4 changed files with 31 additions and 38 deletions
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24
drivers/gpu/drm/sysfb/drm_sysfb_helper.c
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@@ -6,3 +6,27 @@
MODULE_DESCRIPTION("Helpers for DRM sysfb drivers");
MODULE_LICENSE("GPL");
struct drm_display_mode drm_sysfb_mode(unsigned int width,
unsigned int height,
unsigned int width_mm,
unsigned int height_mm)
{
/*
* Assume a monitor resolution of 96 dpi to
* get a somewhat reasonable screen size.
*/
if (!width_mm)
width_mm = DRM_MODE_RES_MM(width, 96ul);
if (!height_mm)
height_mm = DRM_MODE_RES_MM(height, 96ul);
{
const struct drm_display_mode mode = {
DRM_MODE_INIT(60, width, height, width_mm, height_mm)
};
return mode;
}
}
EXPORT_SYMBOL(drm_sysfb_mode);