kernel/linux.git/drivers/gpu/drm/sysfb/drm_sysfb_screen_info.c, branch linux-7.0.y

drm/sysfb: Find screen_info format with helpers

2025-08-26T07:54:17+00:00

Convert drm_sysfb_get_format_si() to lookup the screen_info color format as struct pixel_format with screen_info_pixel_format(). Then search the list of given formats for the screen_info format with pixel_format_equal(). Replaces custom code with helpers. The pixel-compare helper pixel_format_equal() also handles indexed color formats. Prepares for sysfb drivers to support color palettes. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Link: https://lore.kernel.org/r/20250714151513.309475-4-tzimmermann@suse.de

drm/sysfb: Share helpers for screen_info validation

2025-04-14T08:16:14+00:00

Share efidrm's and vesadrm's validation of struct screen_info in shared helpers. Update the drivers. Most validation helpers test individual values against limits and can be shared as they are. For color formats, a common helper looks up the correct DRM format info from a driver-provided list of color formats. These screen_info helpers are only available if CONFIG_SCREEN_INFO has been selected, as done by efidrm and vesadrm. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Link: https://lore.kernel.org/r/20250410083834.10810-4-tzimmermann@suse.de