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path: root/drivers/gpu/drm/sitronix
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2026-03-07drm/sitronix/st7586: fix bad pixel data due to byte swapDavid Lechner
Correctly set dbi->write_memory_bpw for the ST7586 driver. This driver is for a monochrome display that has an unusual data format, so the default value set in mipi_dbi_spi_init() is not correct simply because this controller is non-standard. Previously, we were using dbi->swap_bytes to make the same sort of workaround, but it was removed in the same commit that added dbi->write_memory_bpw, so we need to use the latter now to have the correct behavior. This fixes every 3 columns of pixels being swapped on the display. There are 3 pixels per byte, so the byte swap caused this effect. Fixes: df3fb27a74a4 ("drm/mipi-dbi: Make bits per word configurable for pixel transfers") Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: David Lechner <dlechner@baylibre.com> Link: https://patch.msgid.link/20260228-drm-mipi-dbi-fix-st7586-byte-swap-v1-1-e78f6c24cd28@baylibre.com
2026-02-21Convert 'alloc_obj' family to use the new default GFP_KERNEL argumentLinus Torvalds
This was done entirely with mindless brute force, using git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' | xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/' to convert the new alloc_obj() users that had a simple GFP_KERNEL argument to just drop that argument. Note that due to the extreme simplicity of the scripting, any slightly more complex cases spread over multiple lines would not be triggered: they definitely exist, but this covers the vast bulk of the cases, and the resulting diff is also then easier to check automatically. For the same reason the 'flex' versions will be done as a separate conversion. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21treewide: Replace kmalloc with kmalloc_obj for non-scalar typesKees Cook
This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook <kees@kernel.org>
2025-12-15drm: Add driver for Sitronix ST7920 LCD displaysIker Pedrosa
Add a new DRM/KMS driver for displays using the Sitronix ST7920 controller connected via the SPI bus. This provides a standard framebuffer interface for these common monochrome LCDs. Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: Iker Pedrosa <ikerpedrosam@gmail.com> Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://patch.msgid.link/20251215-st7920-v7-2-36771009ec01@gmail.com
2025-12-15drm/sitronix/st7571-spi: add support for SPI interfaceMarcus Folkesson
Add support for ST7561/ST7571 connected to SPI bus. Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com> Link: https://patch.msgid.link/20251215-st7571-split-v3-6-d5f3205c3138@gmail.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2025-12-15drm/sitronix/st7571: split up the driver into a common and an i2c partMarcus Folkesson
Split up the driver to make it possible to add support for hw interfaces other than I2C. Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com> Link: https://patch.msgid.link/20251215-st7571-split-v3-5-d5f3205c3138@gmail.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2025-12-15drm/sitronix/st7571-i2c: make probe independent of hw interfaceMarcus Folkesson
Create an interface independent layer for the probe function. This is to make it possible to add support for other interfaces. Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com> Link: https://patch.msgid.link/20251215-st7571-split-v3-4-d5f3205c3138@gmail.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2025-12-15drm/sitronix/st7571-i2c: move common structures to st7571.hMarcus Folkesson
Move all structures that will be common for all interfaces (SPI/I2C) to a separate header file. Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com> Link: https://patch.msgid.link/20251215-st7571-split-v3-3-d5f3205c3138@gmail.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2025-12-15drm/sitronix/st7571-i2c: add 'struct device' to st7571_deviceMarcus Folkesson
Keep a copy of the device structure instead of referring to i2c_client. This is a preparation step to separate the generic part from all i2c stuff. Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com> Link: https://patch.msgid.link/20251215-st7571-split-v3-2-d5f3205c3138@gmail.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2025-12-15drm/sitronix/st7571-i2c: rename 'struct drm_device' in st7571_deviceMarcus Folkesson
Rename st7571_device.dev to st7571_device.drm in preparation to introduce a 'struct device' member to this structure. Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com> Link: https://patch.msgid.link/20251215-st7571-split-v3-1-d5f3205c3138@gmail.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2025-10-31drm: include drm_print.h where neededJani Nikula
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 <tzimmermann@suse.de> Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://lore.kernel.org/r/5fe67395907be33eb5199ea6d540e29fddee71c8.1761734313.git.jani.nikula@intel.com
2025-10-22drm/sitronix/st7571-i2c: remove unneeded semicolonMarcus Folkesson
Fix style issue reported by Kernel test robot. Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202510221125.Cg0sM4xJ-lkp@intel.com/ Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com> Link: https://lore.kernel.org/r/20251022-st7571-semicolon-v1-1-83d322618ff4@gmail.com
2025-10-03drm/sitronix/st7571-i2c: reset position before clearing displayMarcus Folkesson
We cannot know where the write pointer is, always reset position to (0,0) before clearing display. Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://lore.kernel.org/r/20250913-st7571-reset-v1-1-ae5f58acdf8d@gmail.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2025-09-01drm/st7571-i2c: add support for 2bit grayscale for XRGB8888Marcus Folkesson
Add support for 2bit grayscale and use it for XRGB8888 when grayscale is supported. Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com> Link: https://lore.kernel.org/r/20250721-st7571-format-v2-6-159f4134098c@gmail.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2025-09-01drm/st7571-i2c: add support for inverted pixel formatMarcus Folkesson
Depending on which display that is connected to the controller, an "1" means either a black or a white pixel. The supported formats (R1/R2/XRGB8888) expects the pixels to map against (4bit): 00 => Black 01 => Dark Gray 10 => Light Gray 11 => White If this is not what the display map against, make it possible to invert the pixels. Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com> Link: https://lore.kernel.org/r/20250721-st7571-format-v2-4-159f4134098c@gmail.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2025-09-01drm/st7571-i2c: correct pixel data format descriptionMarcus Folkesson
The comment describes the pixel data format as stated in the st7571 datasheet, which is not necessary the same as for the connected display. Instead, describe the expected pixel data format which is used for R1/R2/XRGB8888. Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com> Link: https://lore.kernel.org/r/20250721-st7571-format-v2-1-159f4134098c@gmail.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2025-09-01drm/sitronix/st7571-i2c: Make st7571_panel_data variables static constJavier Martinez Canillas
The kernel test robot reported that sparse gives the following warnings: make C=2 M=drivers/gpu/drm/sitronix/ CC [M] st7571-i2c.o CHECK st7571-i2c.c st7571-i2c.c:1027:26: warning: symbol 'st7567_config' was not declared. Should it be static? st7571-i2c.c:1039:26: warning: symbol 'st7571_config' was not declared. Should it be static? MODPOST Module.symvers LD [M] st7571-i2c.ko Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202507180503.nfyD9uRv-lkp@intel.com Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> Link: https://lore.kernel.org/r/20250718152534.729770-1-javierm@redhat.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2025-07-16drm/sitronix/st7571-i2c: Add support for the ST7567 ControllerJavier Martinez Canillas
The Sitronix ST7567 is a monochrome Dot Matrix LCD Controller that has SPI, I2C and parallel interfaces. The st7571-i2c driver only has support for I2C so displays using other transport interfaces are currently not supported. The DRM_FORMAT_R1 pixel format and data commands are the same than what is used by the ST7571 controller, so only is needed a different callback that implements the expected initialization sequence for the ST7567 chip. Reviewed-by: Marcus Folkesson <marcus.folkesson@gmail.com> Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://lore.kernel.org/r/20250715110411.448343-6-javierm@redhat.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2025-07-16drm/sitronix/st7571-i2c: Add an indirection level to parse DTJavier Martinez Canillas
Other Sitronix display controllers might need a different parsing DT logic, so lets add a .parse_dt callback to struct st7571_panel_data. Suggested-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Marcus Folkesson <marcus.folkesson@gmail.com> Link: https://lore.kernel.org/r/20250715110411.448343-4-javierm@redhat.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2025-07-16drm/sitronix/st7571-i2c: Log probe deferral cause for GPIO get failureJavier Martinez Canillas
The driver already uses the dev_err_probe() helper (that only prints error messages for the -EPROBE_DEFER case) when fails to get any other resource. Also do the same when it fails to obtain the reset GPIO. Reviewed-by: Marcus Folkesson <marcus.folkesson@gmail.com> Link: https://lore.kernel.org/r/20250715110411.448343-3-javierm@redhat.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2025-07-16drm/sitronix/st7571-i2c: Fix encoder callbacks function namesJavier Martinez Canillas
It seems the driver took some inspiration from ssd130x and some of the functions (encoder callbacks) were not renamed to use a st7571_ prefix. Reviewed-by: Marcus Folkesson <marcus.folkesson@gmail.com> Link: https://lore.kernel.org/r/20250715110411.448343-2-javierm@redhat.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2025-06-18Merge tag 'drm-misc-next-2025-06-12' of ↵Dave Airlie
https://gitlab.freedesktop.org/drm/misc/kernel into drm-next drm-misc-next for 6.17: UAPI Changes: Cross-subsystem Changes: Core Changes: - atomic-helpers: Tune the enable / disable sequence - bridge: Add destroy hook - color management: Add helpers for hardware gamma LUT handling - HDMI: Add CEC handling, YUV420 output support - sched: tracing improvements Driver Changes: - hyperv: Move out of simple-kms, drm_panic support - i915: drm_panel_follower support - imx: Add IMX8qxq Display Controller Support - lima: Add Rockchip RK3528 GPU Support - nouveau: fence handling cleanup - panfrost: Add BO labeling, 64-bit registers access - qaic: Add RAS Support - rz-du: Add RZ/V2H(P) Support, MIPI-DSI DCS Support - sun4i: Add H616 Support - tidss: Add TI AM62L Support - vkms: YUV and R* formats support - bridges: - Switched to reference counted drm_bridge allocations - panels: - Switched to reference counted drm_panel allocations - Add support for fwnode-based panel lookup - himax-hx8394: Support for Huiling hl055fhv028c - ilitek-ili9881c: Support for 7" Raspberry Pi 720x1280 - panel-edp: Support for KDC KD116N3730A05, N160JCE-ELL CMN, - panel-simple: Support for AUO P238HAN01 - st7701: Support for Winstar wf40eswaa6mnn0 - visionox-rm69299: Support for rm69299-shift - New panels: Renesas R61307, Renesas R69328 Signed-off-by: Dave Airlie <airlied@redhat.com> From: Maxime Ripard <mripard@redhat.com> Link: https://lore.kernel.org/r/20250612-coucal-of-impossible-cleaning-a5eecf@houat
2025-06-11drm/sitronix: st7571-i2c: Select VIDEOMODE_HELPERSNathan Chancellor
This driver requires of_get_display_timing() from CONFIG_VIDEOMODE_HELPERS but does not select it. If no other driver selects it, there will be a failure from the linker if the driver is built in or modpost if it is a module. ERROR: modpost: "of_get_display_timing" [drivers/gpu/drm/sitronix/st7571-i2c.ko] undefined! Select CONFIG_VIDEOMODE_HELPERS to resolve the build failure. Fixes: 4b35f0f41ee2 ("drm/st7571-i2c: add support for Sitronix ST7571 LCD controller") Signed-off-by: Nathan Chancellor <nathan@kernel.org> Link: https://lore.kernel.org/r/20250610-drm-st7571-i2c-select-videomode-helpers-v1-1-d30b50ff6e64@kernel.org Signed-off-by: Maxime Ripard <mripard@kernel.org>
2025-05-27drm/sitronix: Remove broken backwards-compatibility layerGeert Uytterhoeven
When moving the Sitronix DRM drivers and renaming their Kconfig symbols, the old symbols were kept, aiming to provide a seamless migration path when running "make olddefconfig" or "make oldconfig". However, the old compatibility symbols are not visible. Hence unless they are selected by another symbol (which they are not), they can never be enabled, and no backwards compatibility is provided. Drop the broken mechanism and the old symbols. Fixes: 9b8f32002cddf792 ("drm/sitronix: move tiny Sitronix drivers to their own subdir") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://lore.kernel.org/r/20395b14effe5e2e05a4f0856fdcda51c410329d.1747751592.git.geert+renesas@glider.be Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2025-05-12drm/sitronix: move tiny Sitronix drivers to their own subdirMarcus Folkesson
We start to have support many Sitronix displays in the tiny directory, and we expect more to come. Move them to their own subdirectory. Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Suggested-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://lore.kernel.org/r/20250512-sitronix-v3-1-bbf6cc413698@gmail.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
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