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5 Commits

Author SHA1 Message Date
Ethan Tidmore
46120745bb drm/tiny: sharp-memory: fix pointer error dereference 
The function devm_drm_dev_alloc() returns a pointer error upon failure
not NULL. Change null check to pointer error check.

Detected by Smatch:
drivers/gpu/drm/tiny/sharp-memory.c:549 sharp_memory_probe() error:
'smd' dereferencing possible ERR_PTR()

Fixes: b8f9f21716 ("drm/tiny: Add driver for Sharp Memory LCD")
Signed-off-by: Ethan Tidmore <ethantidmore06@gmail.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patch.msgid.link/20260216040438.43702-1-ethantidmore06@gmail.com
 2026-02-17 10:04:28 +01:00
Thomas Zimmermann
136c374d8c drm/sharp-memory: Do not access GEM-DMA vaddr directly 
Use DRM's shadow-plane helper to map and access the GEM object's buffer
within kernel address space. Encapsulates the vmap logic in the GEM-DMA
helpers.

The sharp-memory driver currently reads the vaddr field from the GME
buffer object directly. This only works because GEM code 'automagically'
sets vaddr.

Shadow-plane helpers perform the same steps, but with correct abstraction
behind drm_gem_vmap(). The shadow-plane state provides the buffer address
in kernel address space and the format-conversion state.

v2:
- fix typo in commit description

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://lore.kernel.org/r/20250627152327.8244-1-tzimmermann@suse.de
 2025-08-11 18:49:55 +02:00
Jani Nikula
cb2e1c2136 drm: remove driver date from struct drm_driver and all drivers 
We stopped using the driver initialized date in commit 7fb8af6798
("drm: deprecate driver date") and (eventually) started returning "0"
for drm_version ioctl instead.

Finish the job, and remove the unused date member from struct
drm_driver, its initialization from drivers, along with the common
DRIVER_DATE macros.

v2: Also update drivers/accel (kernel test robot)

Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Simon Ser <contact@emersion.fr>
Acked-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Acked-by: Lucas De Marchi <lucas.demarchi@intel.com>
Acked-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> # msm
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/1f2bf2543aed270a06f6c707fd6ed1b78bf16712.1733322525.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
 2024-12-05 12:35:42 +02:00
Thomas Zimmermann
b86711c6d6 drm/client: Move public client header to clients/ subdirectory 
Move the public header file drm_client_setup.h to the clients/
subdirectory and update all drivers. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241108154600.126162-3-tzimmermann@suse.de
 2024-11-15 09:42:13 +01:00
Alex Lanzano
b8f9f21716 drm/tiny: Add driver for Sharp Memory LCD 
Add support for the monochrome Sharp Memory LCDs.

Co-developed-by: Mehdi Djait <mehdi.djait@bootlin.com>
Signed-off-by: Mehdi Djait <mehdi.djait@bootlin.com>
Signed-off-by: Alex Lanzano <lanzano.alex@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Acked-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241015230617.3020230-3-lanzano.alex@gmail.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
 2024-10-19 02:21:32 +03:00