linux-stable.git/drivers/gpu/drm/sysfb/efidrm.c, branch linux-rolling-stable

drm/sysfb: Return errno code from drm_sysfb_get_visible_size()

2026-08-03T09:25:40+00:00

commit 7bab0f09d753f098977bbba3955d694c2e2c25da upstream.

Change the return type of drm_sysfb_get_visible_size() to s64 so
that it returns a possible errno code from _get_validated_size0().
Fix callers to handle the errno code.

The currently returned unsigned type converts an errno code to a
very large size value, which drivers interpret as visible size of
the system framebuffer. Later efforts to reserve the framebuffer
resource fail.

The bug has been present since efidrm and vesadrm got merged. It
was then part of each driver.

Signed-off-by: Thomas Zimmermann 
Fixes: 32ae90c66fb6 ("drm/sysfb: Add efidrm for EFI displays")
Fixes: a84eb6abe2b6 ("drm/sysfb: Add vesadrm for VESA displays")
Reviewed-by: Javier Martinez Canillas 
Cc: Thomas Zimmermann 
Cc: Javier Martinez Canillas 
Cc: dri-devel@lists.freedesktop.org
Cc:  # v6.16+
Link: https://patch.msgid.link/20260618084327.46567-4-tzimmermann@suse.de
Signed-off-by: Greg Kroah-Hartman

Merge v7.0-rc7 into drm-next

2026-04-07T10:36:31+00:00

Thomas Zimmermann needs 2f42c1a61616 ("drm/ast: dp501: Fix
initialization of SCU2C") for drm-misc-next.

Conflicts:
- drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c

Just between e927b36ae18b ("drm/amd/display: Fix NULL pointer
dereference in dcn401_init_hw()") and it's cherry-pick that confused
git.

- drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c

Deleted in 6b0a6116286e ("drm/amd/pm: Unify version check in SMUv11")
but some cherry-picks confused git. Same for v12/v14.

Signed-off-by: Simona Vetter

drm/sysfb: Fix efidrm error handling and memory type mismatch

2026-03-31T11:04:51+00:00

Fix incorrect error checking and memory type confusion in
efidrm_device_create(). devm_memremap() returns error pointers, not
NULL, and returns system memory while devm_ioremap() returns I/O memory.
The code incorrectly passes system memory to iosys_map_set_vaddr_iomem().

Restructure to handle each memory type separately. Use devm_ioremap*()
with ERR_PTR(-ENXIO) for WC/UC, and devm_memremap() with ERR_CAST() for
WT/WB.

Fixes: 32ae90c66fb6 ("drm/sysfb: Add efidrm for EFI displays")
Signed-off-by: Chen Ni 
Reviewed-by: Thomas Zimmermann 
Signed-off-by: Thomas Zimmermann 
Link: https://patch.msgid.link/20260311064652.2903449-1-nichen@iscas.ac.cn

Merge drm/drm-next into drm-misc-next

2026-02-23T10:48:20+00:00

Let's merge 7.0-rc1 to start the new drm-misc-next window

Signed-off-by: Maxime Ripard

drm/sysfb: Generalize pixel-format matching

2026-02-20T13:38:23+00:00

Provide drm_sysfb_get_format(), a helper that finds a specific DRM
format from a list of pixel formats. The new function builds upon
drm_sysfb_get_format_si(), which finds the DRM format from a given
instance of struct screen_info. Now get the screen_info's pixel format
in the caller. Allows for matching pixel formats in drivers without
screen_info.

Convert the callers in efidrm and vesadrm to the new interface.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Javier Martinez Canillas 
Acked-by: Julius Werner 
Link: https://patch.msgid.link/20260217155836.96267-11-tzimmermann@suse.de

sysfb: Move edid_info into sysfb_primary_display

2025-12-16T13:12:44+00:00

Move x86's edid_info into sysfb_primary_display as a new field named
edid. Adapt all users.

An instance of edid_info has only been defined on x86. With the move
into sysfb_primary_display, it becomes available on all architectures.
Therefore remove this contraint from CONFIG_FIRMWARE_EDID.

x86 fills the EDID data from boot_params.edid_info. DRM drivers pick
up the raw data and make it available to DRM clients. Replace the
drivers' references to edid_info and instead use the sysfb_display_info
as passed from sysfb.

Signed-off-by: Thomas Zimmermann 
Acked-by: Arnd Bergmann 
Acked-by: Ard Biesheuvel 
Signed-off-by: Ard Biesheuvel

sysfb: Pass sysfb_primary_display to devices

2025-12-16T13:12:44+00:00

Instead of screen_info, store a copy of sysfb_primary_display as
device data. Pick it up in drivers. Later changes will add additional
data to the display info, such as EDID information.

Signed-off-by: Thomas Zimmermann 
Acked-by: Arnd Bergmann 
Acked-by: Ard Biesheuvel 
Reviewed-by: Richard Lyu 
Signed-off-by: Ard Biesheuvel

drm: include drm_print.h where needed

2025-10-31T08:34:52+00:00

There are a gazillion files that depend on drm_print.h being indirectly
included via drm_buddy.h, drm_mm.h, or ttm/ttm_resource.h. In
preparation for removing those includes, explicitly include drm_print.h
where needed.

Cc: Thomas Zimmermann 
Reviewed-by: Thomas Zimmermann 
Signed-off-by: Jani Nikula 
Link: https://lore.kernel.org/r/5fe67395907be33eb5199ea6d540e29fddee71c8.1761734313.git.jani.nikula@intel.com

drm/format-helper: Move drm_fb_build_fourcc_list() to sysfb helpers

2025-06-18T08:46:03+00:00

Only sysfb drivers use drm_fb_build_fourcc_list(). Move the function
to sysfb helpers and rename it accordingly. Update drivers and tests.

v3:
- update naming in tests
v2:
- select DRM_SYSFB_HELPER (kernel test robot)

Signed-off-by: Thomas Zimmermann 
Reviewed-by: José Expósito 
Acked-by: Maxime Ripard 
Acked-by: Javier Martinez Canillas 
Link: https://lore.kernel.org/r/20250616083846.221396-4-tzimmermann@suse.de

video: Make global edid_info depend on CONFIG_FIRMWARE_EDID

2025-06-16T09:00:29+00:00

Protect global edid_info behind CONFIG_FIRMWARE_EDID and remove
the config tests for CONFIG_X86. Makes edid_info available iff
its option has been enabled.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Helge Deller 
Link: https://lore.kernel.org/r/20250602075537.137759-3-tzimmermann@suse.de