linux.git/drivers/gpu/drm/sysfb/simpledrm.c, branch v6.18.21

drm/simpledrm: Use of_reserved_mem_region_to_resource() for "memory-region"

2025-08-13T22:12:45+00:00

Use the newly added of_reserved_mem_region_to_resource() function to
handle "memory-region" properties.

Reviewed-by: Javier Martinez Canillas 
Acked-by: Thomas Zimmermann 
Link: https://lore.kernel.org/r/20250703183447.2073902-1-robh@kernel.org
Signed-off-by: Rob Herring (Arm)

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

drm/sysfb: Share helpers for integer validation

2025-04-14T08:16:13+00:00

Provide sysfb helpers for validating framebuffer integer values
against limits. Update drivers. If a driver did not specify a limit
for a certain value, use INT_MAX.

v2:
- declare module information near EOF (Javier)

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Javier Martinez Canillas 
Link: https://lore.kernel.org/r/20250410083834.10810-3-tzimmermann@suse.de

drm/sysfb: simpledrm: Remove unused helper simpledrm_device_of_dev()

2025-04-08T07:11:41+00:00

After moving most of the mode-setting pipeline into drm_sysfb_helper.c,
simpledrm_device_of_dev() is no longer being used. Remove it.

Signed-off-by: Thomas Zimmermann 
Reported-by: Jocelyn Falempe 
Closes: https://lore.kernel.org/dri-devel/20250407131344.139878-1-jfalempe@redhat.com/
Fixes: 177dfbdb7e67 ("drm/sysfb: Merge primary-plane functions")
Reviewed-by: Javier Martinez Canillas 
Reviewed-by: Jocelyn Falempe 
Link: https://lore.kernel.org/r/20250407134753.985925-3-tzimmermann@suse.de

drm/simpledrm: Do not upcast in release helpers

2025-04-08T07:11:40+00:00

The res pointer passed to simpledrm_device_release_clocks() and
simpledrm_device_release_regulators() points to an instance of
struct simpledrm_device. No need to upcast from struct drm_device.
The upcast is harmless, as DRM device is the first field in struct
simpledrm_device.

Signed-off-by: Thomas Zimmermann 
Fixes: 11e8f5fd223b ("drm: Add simpledrm driver")
Cc:  # v5.14+
Reviewed-by: Javier Martinez Canillas 
Reviewed-by: Jocelyn Falempe 
Link: https://lore.kernel.org/r/20250407134753.985925-2-tzimmermann@suse.de

drm/sysfb: Merge primary-plane functions

2025-04-07T09:02:07+00:00

Merge the primary plane code of ofdrm and simpledrm. Replace the
plane implementation in each driver with the shared helpers. Set
up driver callbacks and format modifiers with initializer macros.

The plane code in ofdrm and simpledrm is very similar. Ofdrm has a
more sophisticated implementation of atomic_disable, which clears
individual scanlines. The code in simpledrm clears the whole buffer
at once. Take the ofdrm version.

Simpledrm supports get_scanout_buffer. Import it into the shared
helpers, which makes it available in ofdrm.

The supported formats are all native formats plus an optional enulated
XRGB8888 if that's not already a native format. Provide an initializer
macro that computes the size of the formats array.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Javier Martinez Canillas 
Link: https://lore.kernel.org/r/20250401094056.32904-12-tzimmermann@suse.de

drm/sysfb: Merge CRTC functions

2025-04-07T09:02:07+00:00

Merge the CRTC functions of ofdrm and simpledrm. Replace the code
in each driver with the shared helpers. Set up callbacks with
initializer macros.

Ofdrm supports a gamma LUT, while simpledrm does not. So far ofdrm's
LUT size has been hard-coded in the driver CRTC's atomic_check helper.
Now pass the size of the LUT to the sysfb device. Ofdrm's custom
atomic_flush is still required to apply changes to the LUT. Simpledrm
passes a LUT size of 0, which disables the gamma LUT.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Javier Martinez Canillas 
Link: https://lore.kernel.org/r/20250401094056.32904-11-tzimmermann@suse.de

drm/sysfb: Maintain CRTC state in struct drm_sysfb_crtc_state

2025-04-07T09:02:07+00:00

Move ofdrm's struct ofdrm_crtc_state plus functions to sysfb
helpers and rename everything to drm_sysfb_crtc_state.

The sysfb CRTC state is a regular CRTC state with information on
the primary plane's color format, as required for color management.
Helpers for sysfb planes will later set this up automatically.

In ofdrm and simpledrm, replace existing code with the new helpers.
Ofdrm continues to use the CRTC state for color management. This
has no effect on simpledrm.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Javier Martinez Canillas 
Link: https://lore.kernel.org/r/20250401094056.32904-10-tzimmermann@suse.de

drm/sysfb: Merge connector functions

2025-04-07T09:02:07+00:00

Merge the connector functions of ofdrm and simpledrm. Replace the
code in each driver with the shared helpers. Set up callbacks with
initializer macros.

No effective code changes. The sysfb connector only returns the
preconfigured display mode.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Javier Martinez Canillas 
Link: https://lore.kernel.org/r/20250401094056.32904-9-tzimmermann@suse.de

drm/sysfb: Merge mode-config functions

2025-04-07T09:02:07+00:00

Provide initializer to set struct drm_mode_config_funcs. Convert
ofdrm and simpledrm.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Javier Martinez Canillas 
Link: https://lore.kernel.org/r/20250401094056.32904-8-tzimmermann@suse.de