wireguard-linux/drivers/gpu/drm/sysfb/ofdrm.c, branch davem/net

drm/sysfb: ofdrm: Fix is_avivo() constant comparison bug

2026-08-26T06:50:53Z

The is_avivo() function has a logic error where it compares a constant to another constant instead of checking the device parameter: (PCI_VENDOR_ID_ATI_R600 >= 0x9400) Signed-off-by: Shixiong Ou Reviewed-by: Thomas Zimmermann Fixes: f496834e1674 ("drm/ofdrm: Add per-model device function") Signed-off-by: Thomas Zimmermann Cc: # v6.2+ Link: https://patch.msgid.link/20260731111729.703116-1-oushixiong1025@163.com

drm/sysfb: ofdrm: Fix integer overflow in fb_size calculation

2026-08-26T06:50:09Z

The framebuffer size calculation `fb_size = linebytes * height` can overflow when both values are large (e.g., 46341 * 46341 > INT_MAX). Since linebytes and height are both int types, the multiplication is performed as int * int, which results in undefined behavior on overflow. Use check_mul_overflow() to detect and prevent this overflow, consistent with the approach used in simpledrm.c and corebootdrm.c. Signed-off-by: Shixiong Ou Reviewed-by: Thomas Zimmermann Signed-off-by: Thomas Zimmermann Fixes: c8a17756c425 ("drm/ofdrm: Add ofdrm for Open Firmware framebuffers") Cc: # v6.2+ Link: https://patch.msgid.link/20260825104134.669676-1-oushixiong1025@163.com

Merge tag 'drm-misc-next-2026-05-07' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

2026-05-08T04:16:04Z

drm-misc-next for v7.2-rc1: UAPI Changes: - Support medium/low power modes in amdxdna. - Support limiting frequency in ivpu. - Document license for drm core uAPI headers. - Add the following DRM formats: P230, Y7, XYYY2101010, T430, XVUY210101010. Cross-subsystem Changes: - Add and improve dt-bindings. - Remove unused dma-fence-array's signal_on_any support. Core Changes: - Do not call drop_master on file close if not master. - Convert drm-bridge and drm/atomic to use drm_printf_indent. - Remove the extra call to drm_connector_attach_encoder after drm_bridge_connector_init(). - Assorted docbook updates. Driver Changes: - Bugfixes in amdxdna, ivpu, mipi-dsi, imagination, nouveau, panthor, bridge/analogix_dp, ipv3, lontium-lt8912b, verisilicon, tve200, etnaviv, panel/focaltech-ota7290b, panel/jadard-jd9365da-h3, bridge/ite-it6263, renesas, xlnx, bridge/cdns-dsi, gma500, bridge/microchip-lvds, mgag200. - Add support for MStar TSUMU88ADT3-LF-1 bridge. - Add support for WaveShare 7, Novatek NT35532, Startek KD070HDFLD092, ChipWealth CH13726A AMOLED, Team Source Display TST070WSNE-196C, Displaytech DT050BTFT-PTS panels. - Improve mipi-dsi shutdown and convert a panasonic panel to use the mipi-dsi wrappers. - Allowing dumping vbios over debugfs in GSP-RM mode. - Update maintainers for ivpu, add reviewer for drm-bridge code and update maintainers for LT8912B DRM HDMI bridge. - Add test pattern support to bridge/ti-sn65dsi83. - Convert vmwgfx to vblank timers. - Add power management to sysfb drm drivers to allow suspend/resume. - Support the aforementioned new drm formats in xlnx/qynqmp. - Fix panel Kconfig dependencies. - Add carveout support for debugging and bringup to amxdna. - Add support for long command tx via videobuffer in bridge/tc358768. Signed-off-by: Dave Airlie From: Maarten Lankhorst Link: https://patch.msgid.link/f73f342d-6efb-416d-81b0-1716bdd98d5f@linux.intel.com

drm/sysfb: ofdrm: Support power management

2026-05-04T12:30:59Z

Set PM ops for the ofdrm driver. Suspend and resume the DRM state on systems that support it. Many systems lose the hardware's framebuffer settings on suspend, hence resuming doesn't work there. Yet some systems, most notably emulators, keep the hardware state across suspend/resume cycles. There, DRM's suspend and resume helpers bring back the display on resume. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Link: https://patch.msgid.link/20260408120722.328769-4-tzimmermann@suse.de

drm: Rename struct drm_atomic_state to drm_atomic_commit

2026-05-04T04:05:04Z

The KMS framework uses two slightly different definitions for the state concept. For a given object (plane, CRTC, encoder, etc., so drm_$OBJECT_state), the state is the entire state of that object. However, at the device level, drm_atomic_state refers to a state update for a limited number of objects. Thus, drm_atomic_state isn't the entire device state, but only the full state of some objects in that device. This has been an endless source of confusion and thus bugs. We can rename the drm_atomic_state structure to drm_atomic_commit to make it less confusing. This patch was created using: rg -l drm_atomic_state | \ xargs sed -i 's/drm_atomic_state/drm_atomic_commit/g; s/drm_atomic_commit_helper/drm_atomic_state_helper/g' mv drivers/gpu/drm/tests/drm_atomic_state_test.c drivers/gpu/drm/tests/drm_atomic_commit_test.c Acked-by: Simona Vetter Acked-by: Thomas Zimmermann Acked-by: Jani Nikula Reviewed-by: Luca Ceresoli Tested-by: Luca Ceresoli Signed-off-by: Maxime Ripard Signed-off-by: Dave Airlie Link: https://patch.msgid.link/20260427-drm-drm-atomic-update-v4-1-c0e713bfdf25@kernel.org

drm/sysfb: ofdrm: fix PCI device reference leaks

2026-04-27T09:30:49Z

display_get_pci_dev_of() gets a referenced PCI device via pci_get_device(). Drop that reference when pci_enable_device() fails and release it during the managed teardown path after pci_disable_device(). Without that, ofdrm leaks the pci_dev reference on both the error path and the normal cleanup path. Fixes: c8a17756c425 ("drm/ofdrm: Add ofdrm for Open Firmware framebuffers") Co-developed-by: Myeonghun Pak Signed-off-by: Myeonghun Pak Co-developed-by: Ijae Kim Signed-off-by: Ijae Kim Co-developed-by: Taegyu Kim Signed-off-by: Taegyu Kim Signed-off-by: Yuho Choi Reviewed-by: Thomas Zimmermann Signed-off-by: Thomas Zimmermann Link: https://patch.msgid.link/20260420002513.216-1-dbgh9129@gmail.com

drm: include drm_print.h where needed

2025-10-31T08:34:52Z

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

2025-06-18T08:46:03Z

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/ofdrm: Use helpers for programming gamma ramps

2025-05-26T07:19:24Z

Replace ofdrm's code for programming the hardware gamma LUT with DRM helpers. Either load a provided gamma ramp or program a default. Set the individual entries with a callback. Each gamma value is given as 3 individual 16-bit values for red, green and blue. The driver reduces them to 8 bit to make them fit into hardware registers. v2: - fix coding style Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Link: https://lore.kernel.org/r/20250520094203.30545-5-tzimmermann@suse.de

drm/sysfb: Share helpers for integer validation

2025-04-14T08:16:13Z

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