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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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17
drivers/gpu/drm/sysfb/ofdrm.c
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@@ -1070,21 +1070,6 @@ static const struct ofdrm_device_funcs ofdrm_qemu_device_funcs = {
.cmap_write = ofdrm_qemu_cmap_write,
};
static struct drm_display_mode ofdrm_mode(unsigned int width, unsigned int height)
{
/*
* Assume a monitor resolution of 96 dpi to
* get a somewhat reasonable screen size.
*/
const struct drm_display_mode mode = {
DRM_MODE_INIT(60, width, height,
DRM_MODE_RES_MM(width, 96ul),
DRM_MODE_RES_MM(height, 96ul))
};
return mode;
}
static struct ofdrm_device *ofdrm_device_create(struct drm_driver *drv,
struct platform_device *pdev)
{
@@ -1251,7 +1236,7 @@ static struct ofdrm_device *ofdrm_device_create(struct drm_driver *drv,
*/
iosys_map_set_vaddr_iomem(&sysfb->fb_addr, screen_base);
sysfb->fb_mode = ofdrm_mode(width, height);
sysfb->fb_mode = drm_sysfb_mode(width, height, 0, 0);
sysfb->fb_format = format;
sysfb->fb_pitch = linebytes;