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drm/fb-helper: Replace bpp/depth parameter by color mode

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Replace the combination of bpp and depth with a single color-mode
argument. Handle special cases in simpledrm and ofdrm. Hard-code
XRGB8888 as fallback format for cases where no given format works.

The color-mode argument accepts the same values as the kernel's video
parameter. These are mostly bpp values between 1 and 32. The exceptions
are 15, which has a color depth of 15 and a bpp value of 16; and 32,
which has a color depth of 24 and a bpp value of 32.

v4:
	* add back lost test for bpp_specified (Maira)
	* add Fixes tag (Daniel)
v3:
	* fix ofdrm build (Maxime)
v2:
	* minimize changes (Daniel)
	* use drm_driver_legacy_fb_format() (Daniel)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Tested-by: Maíra Canal <mcanal@igalia.com> # vc4 and vkms
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Fixes: 37c90d589d ("drm/fb-helper: Fix single-probe color-format selection")
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Javier Martinez Canillas <javierm@redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230106112324.22055-1-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann
2023-01-06 12:23:24 +01:00
parent 4c00ac500d
commit d3533a8af4
3 changed files with 36 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpu/drm/tiny/simpledrm.c
View File

@@ -802,6 +802,7 @@ static int simpledrm_probe(struct platform_device *pdev)
{
struct simpledrm_device *sdev;
struct drm_device *dev;
unsigned int color_mode;
int ret;
sdev = simpledrm_device_create(&simpledrm_driver, pdev);
@@ -813,7 +814,11 @@ static int simpledrm_probe(struct platform_device *pdev)
if (ret)
return ret;
drm_fbdev_generic_setup(dev, drm_format_info_bpp(sdev->format, 0));
color_mode = drm_format_info_bpp(sdev->format, 0);
if (color_mode == 16)
color_mode = sdev->format->depth; // can be 15 or 16
drm_fbdev_generic_setup(dev, color_mode);
return 0;
}