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drm: Add Grain Media GM12U320 driver v2

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Add a modesetting driver for Grain Media GM12U320 based devices
(primarily Acer C120 projector, but there may be compatible devices).

This is based on the fb driver from Viacheslav Nurmekhamitov:
https://github.com/slavrn/gm12u320

This driver uses drm_simple_display_pipe to deal with all the atomic
stuff, gem_shmem_helper functions for buffer management and
drm_fbdev_generic_setup for fbdev emulation, so that leaves the driver
itself with only the actual code for talking to the gm12u320 chip,
leading to a nice simple and clean driver.

Changes in v2:
-Add drm-misc tree to MAINTAINERS
-Drop mode_config.preferred_depth = 24 / fix fbdev support

Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190721132525.10396-1-hdegoede@redhat.com
This commit is contained in:
Hans de Goede
2019-07-21 15:25:25 +02:00
parent 73415b4ea5
commit e4f86e4371
6 changed files with 834 additions and 0 deletions
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6
MAINTAINERS
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@@ -5015,6 +5015,12 @@ S: Maintained
F: drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c
F: Documentation/devicetree/bindings/display/panel/feiyang,fy07024di26a30d.txt
DRM DRIVER FOR GRAIN MEDIA GM12U320 PROJECTORS
M: Hans de Goede <hdegoede@redhat.com>
T: git git://anongit.freedesktop.org/drm/drm-misc
S: Maintained
F: drivers/gpu/drm/gm12u320/
DRM DRIVER FOR ILITEK ILI9225 PANELS
M: David Lechner <david@lechnology.com>
S: Maintained

2
drivers/gpu/drm/Kconfig
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@@ -354,6 +354,8 @@ source "drivers/gpu/drm/aspeed/Kconfig"
source "drivers/gpu/drm/mcde/Kconfig"
source "drivers/gpu/drm/gm12u320/Kconfig"
# Keep legacy drivers last
menuconfig DRM_LEGACY

1
drivers/gpu/drm/Makefile
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@@ -120,3 +120,4 @@ obj-$(CONFIG_DRM_LIMA) += lima/
obj-$(CONFIG_DRM_PANFROST) += panfrost/
obj-$(CONFIG_DRM_ASPEED_GFX) += aspeed/
obj-$(CONFIG_DRM_MCDE) += mcde/
obj-$(CONFIG_DRM_GM12U320) += gm12u320/

9
drivers/gpu/drm/gm12u320/Kconfig Normal file
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@@ -0,0 +1,9 @@
# SPDX-License-Identifier: GPL-2.0+
config DRM_GM12U320
tristate "GM12U320 driver for USB projectors"
depends on DRM && USB
select DRM_KMS_HELPER
select DRM_GEM_SHMEM_HELPER
help
This is a KMS driver for projectors which use the GM12U320 chipset
for video transfer over USB2/3, such as the Acer C120 mini projector.

2
drivers/gpu/drm/gm12u320/Makefile Normal file
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@@ -0,0 +1,2 @@
# SPDX-License-Identifier: GPL-2.0+
obj-$(CONFIG_DRM_GM12U320) += gm12u320.o

814
drivers/gpu/drm/gm12u320/gm12u320.c Normal file
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