This patch series port the out-of-tree driver for Hikey 970 (which should also support Hikey 960) from the official 96boards tree:
https://github.com/96boards-hikey/linux/tree/hikey970-v4.9
Based on his history, this driver seems to be originally written for Kernel 4.4, and was later ported to Kernel 4.9. The original driver used to depend on ION (from Kernel 4.4) and had its own implementation for FB dev API.
As I need to preserve the original history (with has patches from both HiSilicon and from Linaro), I'm starting from the original patch applied there. The remaining patches are incremental, and port this driver to work with upstream Kernel.
This driver doesn't depend on any firmware or on any special userspace code. It works as-is with both X11 and Wayland.
Yet, I'm submitting it via staging due to the following reasons:
- It depends on the LDO3 power supply, which is provided by a regulator driver that it is currently on staging; - Due to legal reasons, I need to preserve the authorship of each one responsbile for each patch. So, I need to start from the original patch from Kernel 4.4; - There are still some problems I need to figure out how to solve: - The adv7535 can't get EDID data. Maybe it is a timing issue, but it requires more research to be sure about how to solve it; - The driver only accept resolutions on a defined list, as there's a known bug that this driver may have troubles with random resolutions. Probably due to a bug at the pixel clock settings; - Sometimes (at least with 1080p), it generates LDI underflow errors, which in turn causes the DRM to stop working. That happens for example when using gdm on Wayland and gnome on X11; - Probably related to the previous issue, when the monitor suspends due to DPMS, it doesn't return back to life.
So, IMO, the best is to keep it on staging for a while, until those remaining bugs gets solved.
I added this series, together with the regulator driver and a few other patches (including a hack to fix a Kernel 5.8 regression at WiFi ) at:
https://gitlab.freedesktop.org/mchehab_kernel/hikey-970/-/commits/master
Chen Feng (1): staging: hikey9xx: Add hisilicon DRM driver for hikey960/970
John Stultz (1): staging: hikey9xx/gpu: port it to work with Kernel v4.9
Liwei Cai (2): staging: hikey9xx/gpu: solve tearing issue of display staging: hikey9xx/gpu: resolve the performance issue by interrupt mechanism
Mauro Carvalho Chehab (38): staging: hikey9xx/gpu: get rid of adv7535 fork staging: hikey9xx/gpu: rename the Kirin9xx namespace staging: hikey9xx/gpu: get rid of kirin9xx_fbdev.c staging: hikey9xx/gpu: get rid of some ifdefs staging: hikey9xx/gpu: rename the config option for Kirin970 staging: hikey9xx/gpu: change the includes to reflect upstream staging: hikey9xx/gpu: port driver to upstream kAPIs staging: hikey9xx/gpu: add a copy of set_reg() function there staging: hikey9xx/gpu: get rid of ION headers staging: hikey9xx/gpu: add support for using a reserved CMA memory staging: hikey9xx/gpu: cleanup encoder attach logic staging: hikey9xx/gpu: Change the logic which sets the burst mode staging: hikey9xx/gpu: fix the DRM setting logic staging: hikey9xx/gpu: do some code cleanups staging: hikey9xx/gpu: use default GEM_CMA fops staging: hikey9xx/gpu: place vblank enable/disable at the right place staging: hikey9xx/gpu: remove an uneeded hack staging: hikey9xx/gpu: add a possible implementation for atomic_disable staging: hikey9xx/gpu: register connector staging: hikey9xx/gpu: fix driver name staging: hikey9xx/gpu: get rid of iommu_format staging: hikey9xx/gpu: re-work the mode validation code staging: hikey9xx/gpu: add support for enable/disable ldo3 regulator staging: hikey9xx/gpu: add SPMI headers staging: hikey9xx/gpu: solve most coding style issues staging: hikey9xx/gpu: don't use iommu code staging: hikey9xx/gpu: add kirin9xx driver to the building system staging: hikey9xx/gpu: get rid of typedefs staging: hikey9xx/gpu: get rid of input/output macros staging: hikey9xx/gpu: get rid of some unused data staging: hikey9xx/gpu: place common definitions at kirin9xx_dpe.h staging: hikey9xx/gpu: get rid of DRM_HISI_KIRIN970 dts: hisilicon: hi3670.dtsi: add I2C settings dts: hikey970-pinctrl.dtsi: add missing pinctrl settings dt: hisilicon: add support for the PMIC found on Hikey 970 dts: add support for Hikey 970 DRM staging: hikey9xx/gpu: drop kirin9xx_pwm dt: display: Add binds for the DPE and DSI controller for Kirin 960/970
Xiubin Zhang (7): staging: hikey9xx/gpu: add support to hikey970 HDMI and panel staging: hikey9xx/gpu: Solve SR Cannot Display Problems. staging: hikey9xx/gpu: Solve HDMI compatibility Problem. staging: hikey9xx/gpu: Support MIPI DSI 3 lanes for hikey970. staging: hikey9xx/gpu: Solve SR test reset problem for hikey970. staging: hikey9xx/gpu: add debug prints for this driver staging: hikey9xx/gpu: Add support 10.1 inch special HDMI displays.
.../display/hisilicon,hi3660-dpe.yaml | 99 + .../display/hisilicon,hi3660-dsi.yaml | 102 + .../boot/dts/hisilicon/hi3670-hikey970.dts | 56 +- arch/arm64/boot/dts/hisilicon/hi3670.dtsi | 77 + .../boot/dts/hisilicon/hikey970-drm.dtsi | 93 + .../boot/dts/hisilicon/hikey970-pinctrl.dtsi | 548 +++- .../boot/dts/hisilicon/hikey970-pmic.dtsi | 197 ++ drivers/staging/hikey9xx/Kconfig | 3 + drivers/staging/hikey9xx/Makefile | 1 + drivers/staging/hikey9xx/gpu/Kconfig | 22 + drivers/staging/hikey9xx/gpu/Makefile | 9 + drivers/staging/hikey9xx/gpu/kirin960_defs.c | 378 +++ .../staging/hikey9xx/gpu/kirin960_dpe_reg.h | 233 ++ drivers/staging/hikey9xx/gpu/kirin970_defs.c | 381 +++ .../staging/hikey9xx/gpu/kirin970_dpe_reg.h | 1188 ++++++++ drivers/staging/hikey9xx/gpu/kirin9xx_dpe.h | 2437 +++++++++++++++++ .../hikey9xx/gpu/kirin9xx_drm_dpe_utils.c | 1178 ++++++++ .../hikey9xx/gpu/kirin9xx_drm_dpe_utils.h | 286 ++ .../staging/hikey9xx/gpu/kirin9xx_drm_drv.c | 368 +++ .../staging/hikey9xx/gpu/kirin9xx_drm_drv.h | 57 + .../staging/hikey9xx/gpu/kirin9xx_drm_dss.c | 1063 +++++++ .../hikey9xx/gpu/kirin9xx_drm_overlay_utils.c | 1005 +++++++ .../hikey9xx/gpu/kirin9xx_dw_drm_dsi.c | 2132 ++++++++++++++ .../hikey9xx/gpu/kirin9xx_dw_dsi_reg.h | 146 + .../staging/hikey9xx/gpu/kirin9xx_fb_panel.h | 191 ++ 25 files changed, 12229 insertions(+), 21 deletions(-) create mode 100644 Documentation/devicetree/bindings/display/hisilicon,hi3660-dpe.yaml create mode 100644 Documentation/devicetree/bindings/display/hisilicon,hi3660-dsi.yaml create mode 100644 arch/arm64/boot/dts/hisilicon/hikey970-drm.dtsi create mode 100644 arch/arm64/boot/dts/hisilicon/hikey970-pmic.dtsi create mode 100644 drivers/staging/hikey9xx/gpu/Kconfig create mode 100644 drivers/staging/hikey9xx/gpu/Makefile create mode 100644 drivers/staging/hikey9xx/gpu/kirin960_defs.c create mode 100644 drivers/staging/hikey9xx/gpu/kirin960_dpe_reg.h create mode 100644 drivers/staging/hikey9xx/gpu/kirin970_defs.c create mode 100644 drivers/staging/hikey9xx/gpu/kirin970_dpe_reg.h create mode 100644 drivers/staging/hikey9xx/gpu/kirin9xx_dpe.h create mode 100644 drivers/staging/hikey9xx/gpu/kirin9xx_drm_dpe_utils.c create mode 100644 drivers/staging/hikey9xx/gpu/kirin9xx_drm_dpe_utils.h create mode 100644 drivers/staging/hikey9xx/gpu/kirin9xx_drm_drv.c create mode 100644 drivers/staging/hikey9xx/gpu/kirin9xx_drm_drv.h create mode 100644 drivers/staging/hikey9xx/gpu/kirin9xx_drm_dss.c create mode 100644 drivers/staging/hikey9xx/gpu/kirin9xx_drm_overlay_utils.c create mode 100644 drivers/staging/hikey9xx/gpu/kirin9xx_dw_drm_dsi.c create mode 100644 drivers/staging/hikey9xx/gpu/kirin9xx_dw_dsi_reg.h create mode 100644 drivers/staging/hikey9xx/gpu/kirin9xx_fb_panel.h