linux.git/drivers/gpu/drm/tiny/Makefile, branch v6.12.80

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

drm/bochs: Move to tiny/

2021-07-05T06:54:44+00:00

The bochs driver is only ~600 lines of code. Putting it into tiny/
cleans up the DRM directory slightly. Some style problems were fixed
and unneeded include statements were removed. No functional changes.

v2:
	* make bochs_mode_funcs static (Daniel, kernel test robot)
	* rebase onto aperture API changes

Signed-off-by: Thomas Zimmermann 
Acked-by: Daniel Vetter 
Link: https://patchwork.freedesktop.org/patch/msgid/20210702075434.27677-2-tzimmermann@suse.de

drm: Add simpledrm driver

2021-05-01T10:45:04+00:00

The simpledrm driver is a DRM driver for simple-framebuffer framebuffers
as provided by the kernel's boot code. This driver enables basic
graphical output on many different graphics devices that are provided
by the platform (e.g., EFI, VESA, embedded framebuffers).

With the kernel's simple-framebuffer infrastructure, the kernel receives
a pre-configured framebuffer from the system (i.e., firmware, boot
loader). It creates a platform device to which simpledrm attaches.
The system's framebuffer consists of a memory range, size and format.
Based on these values, simpledrm creates a DRM devices. No actual
modesetting is possible.

A firmware framebuffer might also be specified via device-tree files. If
no device platform data is given, try the DT device node.

Make sure required hardware clocks and regulators are enabled while the
firmware framebuffer is in use. The basic code has been taken from the
simplefb driver and adapted to DRM. Clocks are released automatically
via devres helpers.

The drivers displays a console on simpledrm's framebuffer. The default
framebuffer format is being used.

v4:
* disable simplefb if simpledrm has been selected (Maxime)
v3:
* add disable function that clears screen to black (Daniel)
* set shadow buffering only for fbdev emulation
* set platform-driver data during device creation
v2:
* rename driver to simpledrm
* add dri-devel to MAINTAINERS entry
* put native format first in primary-plane format list (Daniel)
* inline simplekms_device_cleanup() (Daniel)
* use helpers for shadow-buffered planes
* fix whitespace errors
* add Device Tree match table
* clean-up parser wrappers
* use strscpy()

Signed-off-by: Thomas Zimmermann
Reviewed-by: Daniel Vetter # fbdev support
Acked-by: Maxime Ripard
Tested-by: nerdopolis
Link: https://patchwork.freedesktop.org/patch/msgid/20210430105840.30515-5-tzimmermann@suse.de
Link: https://patchwork.freedesktop.org/patch/msgid/20210430105840.30515-6-tzimmermann@suse.de
Link: https://patchwork.freedesktop.org/patch/msgid/20210430105840.30515-7-tzimmermann@suse.de
Link: https://patchwork.freedesktop.org/patch/msgid/20210430105840.30515-8-tzimmermann@suse.de
Link: https://patchwork.freedesktop.org/patch/msgid/20210430105840.30515-9-tzimmermann@suse.de

drm/arc: Move to drm/tiny

2021-02-25T12:19:04+00:00

Because it is.

v2: Delete now unused crtc funcs (0day)

Acked-by: Thomas Zimmermann 
Cc: Eugeniy Paltsev 
Signed-off-by: Daniel Vetter 
Cc: Alexey Brodkin 
Link: https://patchwork.freedesktop.org/patch/msgid/20210112084358.2771527-15-daniel.vetter@ffwll.ch

drm/cirrus: Move to drm/tiny

2020-04-28T14:05:15+00:00

Because it is. Huge congrats to everyone who made this kind of
refactoring happen!

Acked-by: Gerd Hoffmann 
Reviewed-by: Thomas Zimmermann 
Acked-by: Sam Ravnborg 
Signed-off-by: Daniel Vetter 
Cc: Dave Airlie 
Cc: Gerd Hoffmann 
Cc: virtualization@lists.linux-foundation.org
Link: https://patchwork.freedesktop.org/patch/msgid/20200415074034.175360-38-daniel.vetter@ffwll.ch

drm/tiny: add support for tft displays based on ilitek,ili9486

2020-02-09T19:42:30+00:00

This adds support fot ilitek,ili9486 based displays with shift register
in front of controller.
Ozzmaker,Piscreen and Waveshare,rpi-lcd-35 are such displays.

Acked-by: Sam Ravnborg  (v4)
Reviewed-by: Noralf Tronnes  (v4)
Signed-off-by: Kamlesh Gurudasani 
Signed-off-by: Sam Ravnborg 
[fixed checkpatch warnings]
Link: https://patchwork.freedesktop.org/patch/msgid/a9c8065c3ef7707650630b3b21a0c01d725fc5a0.1581270802.git.kamlesh.gurudasani@gmail.com

drm/gm12u320: Move driver to drm/tiny

2019-07-31T13:17:03+00:00

Move the driver to the new haven for tiny DRM drivers.

Cc: Hans de Goede 
Suggested-by: Daniel Vetter 
Signed-off-by: Noralf Trønnes 
Acked-by: Daniel Vetter 
Acked-by: Sam Ravnborg 
Reviewed-by: Hans de Goede 
Link: https://patchwork.freedesktop.org/patch/msgid/20190725105132.22545-4-noralf@tronnes.org

drm/tinydrm: Rename folder to tiny

2019-07-31T13:16:10+00:00

The drm in tinydrm is superfluous so rename to tiny.

Suggested-by: Daniel Vetter 
Signed-off-by: Noralf Trønnes 
Acked-by: Daniel Vetter 
Acked-by: Sam Ravnborg 
Reviewed-by: Hans de Goede 
Link: https://patchwork.freedesktop.org/patch/msgid/20190725105132.22545-3-noralf@tronnes.org