[PATCH v7 0/3] GUD USB Display driver
Noralf Trønnes
noralf at tronnes.org
Fri Mar 5 16:31:01 UTC 2021
Hi,
A while back I had the idea to turn a Raspberry Pi Zero into a $5
USB to HDMI/SDTV/DPI display adapter.
The protocol is open so people are free to make displays implementing it and
use this driver, all that's needed is to add a USB vid:pid to the driver for
the display.
See the wiki[1] for more information and images for the Raspberry Pi Zero/4.
Changes in this version:
- LZ4_compress_default() can return zero, check for that
- Fix memory leak in gud_pipe_check() error path (Peter)
- Improve debug and error messages (Peter)
- Don't pass length in protocol structs (Peter)
- Pass USB interface to gud_usb_control_msg() et al. (Peter)
- Improve gud_connector_fill_properties() (Peter)
- Add GUD_PIXEL_FORMAT_RGB111 (Peter)
- Remove GUD_REQ_SET_VERSION (Peter)
- Fix DRM_IOCTL_MODE_OBJ_SETPROPERTY and the rotation property
- Fix dma-buf import (Thomas)
Note: There are several changes to the protocol.
I plan to apply the patches in a week or so unless something turns out to be
broken.
Dependency:
drm: Use USB controller's DMA mask when importing dmabufs[2]
(currently in drm-misc-fixes but not in drm-misc-next yet, also present in
drm-tip and linux-next)
Noralf.
[1] https://github.com/notro/gud/wiki
[2] https://patchwork.freedesktop.org/patch/msgid/20210303133229.3288-1-tzimmermann@suse.de
Noralf Trønnes (3):
drm/uapi: Add USB connector type
drm/probe-helper: Check epoch counter in output_poll_execute()
drm: Add GUD USB Display driver
MAINTAINERS | 8 +
drivers/gpu/drm/Kconfig | 2 +
drivers/gpu/drm/Makefile | 1 +
drivers/gpu/drm/drm_connector.c | 1 +
drivers/gpu/drm/drm_probe_helper.c | 7 +-
drivers/gpu/drm/gud/Kconfig | 14 +
drivers/gpu/drm/gud/Makefile | 4 +
drivers/gpu/drm/gud/gud_connector.c | 729 ++++++++++++++++++++++++++++
drivers/gpu/drm/gud/gud_drv.c | 659 +++++++++++++++++++++++++
drivers/gpu/drm/gud/gud_internal.h | 154 ++++++
drivers/gpu/drm/gud/gud_pipe.c | 535 ++++++++++++++++++++
include/drm/gud.h | 333 +++++++++++++
include/uapi/drm/drm_mode.h | 1 +
13 files changed, 2447 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/gud/Kconfig
create mode 100644 drivers/gpu/drm/gud/Makefile
create mode 100644 drivers/gpu/drm/gud/gud_connector.c
create mode 100644 drivers/gpu/drm/gud/gud_drv.c
create mode 100644 drivers/gpu/drm/gud/gud_internal.h
create mode 100644 drivers/gpu/drm/gud/gud_pipe.c
create mode 100644 include/drm/gud.h
--
2.23.0
More information about the dri-devel
mailing list