linux.git/drivers/gpu/drm/tiny/Makefile, branch v6.18.21

drm: tiny: Add support for Mayqueen Pixpaper e-ink panel

2025-09-05T12:53:07+00:00

Introduce a DRM driver for the Mayqueen Pixpaper e-ink display panel,
which is controlled via SPI. The driver supports a 122x250 resolution
display with XRGB8888 format.

Also, add a MAINTAINERS entry for the Pixpaper driver.

Signed-off-by: LiangCheng Wang 
Reviewed-by: Thomas Zimmermann 
Signed-off-by: Thomas Zimmermann 
Link: https://lore.kernel.org/r/20250902-drm-v5-3-d77c678c4ae3@gmail.com

drm/sitronix: move tiny Sitronix drivers to their own subdir

2025-05-12T08:26:40+00:00

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 
Suggested-by: Javier Martinez Canillas 
Signed-off-by: Marcus Folkesson 
Acked-by: Thomas Zimmermann 
Link: https://lore.kernel.org/r/20250512-sitronix-v3-1-bbf6cc413698@gmail.com
Signed-off-by: Javier Martinez Canillas

drm/st7571-i2c: add support for Sitronix ST7571 LCD controller

2025-04-23T19:47:23+00:00

Sitronix ST7571 is a 4bit gray scale dot matrix LCD controller.
The controller has a SPI, I2C and 8bit parallel interface, this
driver is for the I2C interface only.

Reviewed-by: Thomas Zimmermann 
Reviewed-by: Javier Martinez Canillas 
Signed-off-by: Marcus Folkesson 
Link: https://lore.kernel.org/r/20250423-st7571-v6-2-e9519e3c4ec4@gmail.com
Signed-off-by: Javier Martinez Canillas

drm: Move sysfb drivers into separate subdirectory

2025-04-07T09:02:06+00:00

The ofdrm and simpledrm drivers are special as they operate on
externally provided framebuffers. Move them into their own sub-
directory. Will let them share common code.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Javier Martinez Canillas 
Link: https://lore.kernel.org/r/20250401094056.32904-5-tzimmermann@suse.de

drm/tiny: add driver for Apple Touch Bars in x86 Macs

2025-03-03T15:13:33+00:00

The Touch Bars found on x86 Macs support two USB configurations: one
where the device presents itself as a HID keyboard and can display
predefined sets of keys, and one where the operating system has full
control over what is displayed.

This commit adds support for the display functionality of the second
configuration. Functionality for the first configuration has been
merged in the HID tree.

Note that this driver has only been tested on T2 Macs, and only includes
the USB device ID for these devices. Testing on T1 Macs would be
appreciated.

Credit goes to Ben (Bingxing) Wang on GitHub for reverse engineering
most of the protocol.

Also, as requested by Andy, I would like to clarify the use of __packed
structs in this driver:

- All the packed structs are aligned except for appletbdrm_msg_information.
- We have to pack appletbdrm_msg_information since it is requirement of
the protocol.
- We compared binaries compiled by keeping the rest structs __packed and
not __packed using bloat-o-meter, and __packed was not affecting code
generation.
- To maintain consistency, rest structs have been kept __packed.

I would also like to point out that since the driver was reverse-engineered
the actual data types of the protocol might be different, including, but
not limited to, endianness.

Link: https://github.com/imbushuo/DFRDisplayKm
Signed-off-by: Kerem Karabay
Co-developed-by: Atharva Tiwari
Signed-off-by: Atharva Tiwari
Co-developed-by: Aditya Garg
Signed-off-by: Aditya Garg
Signed-off-by: Aun-Ali Zaidi
Reviewed-by: Thomas Zimmermann
Signed-off-by: Thomas Zimmermann
Link: https://patchwork.freedesktop.org/patch/msgid/FCAC702C-F84A-47F9-8C78-BBBB34D08500@live.com

drm/cirrus: Rename to cirrus-qemu

2024-11-26T13:21:51+00:00

This driver is only for Qemu's emulated Cirrus hardware. Name it
accordingly.

Signed-off-by: Thomas Zimmermann 
Acked-by: Gerd Hoffmann 
Link: https://patchwork.freedesktop.org/patch/msgid/20241029143928.208349-3-tzimmermann@suse.de

drm/tiny: Add driver for Sharp Memory LCD

2024-10-18T23:21:32+00:00

Add support for the monochrome Sharp Memory LCDs.

Co-developed-by: Mehdi Djait 
Signed-off-by: Mehdi Djait 
Signed-off-by: Alex Lanzano 
Reviewed-by: Dmitry Baryshkov 
Acked-by: Uwe Kleine-König 
Link: https://patchwork.freedesktop.org/patch/msgid/20241015230617.3020230-3-lanzano.alex@gmail.com
Signed-off-by: Dmitry Baryshkov

drm/ofdrm: Add ofdrm for Open Firmware framebuffers

2022-10-14T07:49:47+00:00

Open Firmware provides basic display output via the 'display' node.
DT platform code already provides a device that represents the node's
framebuffer. Add a DRM driver for the device. The display mode and
color format is pre-initialized by the system's firmware. Runtime
modesetting via DRM is not possible. The display is useful during
early boot stages or as error fallback.

Similar functionality is already provided by fbdev's offb driver,
which is insufficient for modern userspace. The old driver includes
support for BootX device tree, which can be found on old 32-bit
PowerPC Macintosh systems. If these are still in use, the
functionality can be added to ofdrm or implemented in a new
driver. As with simpledrm, the fbdev driver cannot be selected if
ofdrm is already enabled.

Two notable points about the driver:

* Reading the framebuffer aperture from the device tree is not
reliable on all systems. Ofdrm takes the heuristics and a comment
from offb to pick the correct range.

* No resource management may be tied to the underlying PCI device.
Otherwise the handover to the native driver will fail with a resource
conflict. PCI management is therefore done as part of the platform
device's cleanup.

The driver has been tested on qemu's ppc64le emulation. The device
hand-over has been tested with bochs.

v5:
* use drm_atomic_helper_check_crtc_primary_plane()
v4:
* set preferred depth to the correct value
* set bpp value for console emulation
* output scanout-buffer parameters with drm_dbg()
v3:
* reintegrate FWFB helpers into ofdrm
* use damage iterator
* sync GEM BOs with drm_gem_fb_{begin,end}_cpu_access()
* fix various atomic_check helpers
* remove CRTC atomic_{enable,disable} (Javier)
* compute stride with drm_format_info_min_pitch() (Daniel)
v2:
* removed simple-pipe helpers
* built driver on top of FWFB helpers
* merged all init code into single function
* make PCI support optional (Michal)
* support COMPILE_TEST (Javier)

Signed-off-by: Thomas Zimmermann
Reviewed-by: Javier Martinez Canillas

convert
Link: https://patchwork.freedesktop.org/patch/msgid/20221011150712.3928-2-tzimmermann@suse.de

drm/tiny: Add MIPI DBI compatible SPI driver

2022-02-28T09:29:33+00:00

Add a driver that will work with most MIPI DBI compatible SPI panels.
This avoids adding a driver for every new MIPI DBI compatible controller
that is to be used by Linux. The 'compatible' Device Tree property with
a '.bin' suffix will be used to load a firmware file that contains the
controller configuration.

Example (driver will load sainsmart18.bin):

display@0 {
compatible = "sainsmart18", "panel-mipi-dbi-spi";
...
};

v5:
- kconfig: s/DRM_KMS_CMA_HELPER/DRM_GEM_CMA_HELPER/ (Sam)
- kconfig: Add select VIDEOMODE_HELPERS (Sam)
- kconfig: Add wiki url in the description (Sam)
- Split out and use of_get_drm_panel_display_mode()(Sam)
- Only use the first compatible to look for a firmware file since the
binding mandates 2 compatibles.
- Make having a firmware file mandatory so we can print an error
message if it's missing to improve the user experience. It's very
unlikely that a controller doesn't need to be initialized and if
it doesn't, it's possible to have a firmware file containing only
a DCS NOP.

v4:
- Move driver to drm/tiny where the other drivers of its kind are located.
The driver module will not be shared with a future DPI driver after all.

v3:
- Move properties to DT (Maxime)
- The MIPI DPI spec has optional support for DPI where the controller is
configured over DBI. Rework the command functions so they can be moved
to drm_mipi_dbi and shared with a future panel-mipi-dpi-spi driver

v2:
- Drop model property and use compatible instead (Rob)
- Add wiki entry in MAINTAINERS

Acked-by: Maxime Ripard
Reviewed-by: Sam Ravnborg
Signed-off-by: Noralf Trønnes
Signed-off-by: Maxime Ripard
Link: https://patchwork.freedesktop.org/patch/msgid/20220227124713.39766-6-noralf@tronnes.org

drm/tiny: add driver for newhaven, 1.8-128160EF

2021-10-15T18:29:02+00:00

This patch adds support for Newhaven's NHD-1.8-128160EF display, featuring
an Ilitek ILI9163 controller.

Signed-off-by: Daniel Mack 
Acked-by: Daniel Vetter 
Acked-by: Thomas Zimmermann 
Signed-off-by: Sam Ravnborg 
Link: https://patchwork.freedesktop.org/patch/msgid/20211015150131.1020878-3-daniel@zonque.org