mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-02-16 21:15:10 -05:00
Code Issues Packages Projects Releases Wiki Activity

drm/sysfb: efidrm: Add EDID support

Browse Source 
Enable the connector's EDID property if edid_info contains valid
data. Exports the EDID via sysfs for user-space compositors.

EDID information is not always available. Depending on the system
and kernel configuration, it is either provided by the boot loader
or read by the kernel during early boot stages.

As of now, there's only one EFI display, so that EDID data always
belongs to this output. This might change if there's ever more than
one EFI display in the system.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://lore.kernel.org/r/20250401094056.32904-16-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann
2025-04-01 11:37:18 +02:00
parent 32ae90c66f
commit 305396ac77
1 changed files with 8 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/gpu/drm/sysfb/efidrm.c
View File

@@ -13,6 +13,7 @@
#include <drm/drm_damage_helper.h>
#include <drm/drm_device.h>
#include <drm/drm_drv.h>
#include <drm/drm_edid.h>
#include <drm/drm_fbdev_shmem.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_atomic_helper.h>
@@ -22,6 +23,7 @@
#include <drm/drm_modeset_helper_vtables.h>
#include <drm/drm_probe_helper.h>
#include <video/edid.h>
#include <video/pixel_format.h>
#include "drm_sysfb_helper.h"
@@ -308,6 +310,10 @@ static struct efidrm_device *efidrm_device_create(struct drm_driver *drv,
drm_dbg(dev, "framebuffer format=%p4cc, size=%dx%d, stride=%d bytes\n",
&format->format, width, height, stride);
#ifdef CONFIG_X86
if (drm_edid_header_is_valid(edid_info.dummy) == 8)
sysfb->edid = edid_info.dummy;
#endif
sysfb->fb_mode = drm_sysfb_mode(width, height, 0, 0);
sysfb->fb_format = format;
sysfb->fb_pitch = stride;
@@ -413,6 +419,8 @@ static struct efidrm_device *efidrm_device_create(struct drm_driver *drv,
drm_connector_set_panel_orientation_with_quirk(connector,
DRM_MODE_PANEL_ORIENTATION_UNKNOWN,
width, height);
if (sysfb->edid)
drm_connector_attach_edid_property(connector);
ret = drm_connector_attach_encoder(connector, encoder);
if (ret)