The Amlogic D-PHY in the Amlogic AXG SoC Family does support a frequency
higher than 10MHz for the TX Escape Clock, thus make the target rate
configurable.
This is based on the Linux commit [1] and adapted to the U-Boot driver.
[1] a328ca7e4af3 ("drm/bridge: dw-mipi-dsi: permit configuring the escape clock rate")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
The timing values for dw-dsi are often dependent on the used display and
according to Philippe Cornu will most likely also depend on the used phy
technology in the soc-specific implementation.
To solve this and allow specific implementations to define them as needed
add a new get_timing callback to phy_ops and call this from the dphy_timing
function to retrieve the necessary values for the specific mode.
This is based on the Linux commit [1] and adapted to the U-Boot driver.
[1] 25ed8aeb9c39 ("drm/bridge/synopsys: dsi: driver-specific configuration of phy timings")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
There is no member `dev` in dw_mipi_dsi, but there is one in mipi_dsi_host,
so use that.
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>
Tested-by: Patrick Delaunay <patrick.delaunay@st.com>
At present dm/device.h includes the linux-compatible features. This
requires including linux/compat.h which in turn includes a lot of headers.
One of these is malloc.h which we thus end up including in every file in
U-Boot. Apart from the inefficiency of this, it is problematic for sandbox
which needs to use the system malloc() in some files.
Move the compatibility features into a separate header file.
Signed-off-by: Simon Glass <sjg@chromium.org>
Remove the compatible "synopsys,dw-mipi-dsi" added in U-Boot
(it don't exist in Linux kernel binding); it is only used
to bind the generic synopsys UCLASS_DSI_HOST "dw_mipi_dsi" to
the driver "stm32-display-dsi" UCLASS_VIDEO_BRIDGE
This binding is done in Linux kernel drivers without compatible
(dw_mipi_dsi_bind() is called in bind of driver, for example in
drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c).
This patch does the same in U-Boot driver, the STM32 driver
calls during its bind the function device_bind_driver_to_node
to bind the generic driver "dw_mipi_dsi" at the same address.
This patch reduces the device tree differences
between Linux kernel and U-Boot for stm32mp1 platform.
Tested with v2020.01-rc1 on STM32MP157C-EV1 and STM32MP157C-DK2.
The dependency of driver is clearer and the probe order is guaranteed.
STM32MP> dm tree
Class Index Probed Driver Name
-----------------------------------------------------------
root 0 [ + ] root_driver root_driver
sysreset 0 [ ] syscon_reboot |-- reboot
simple_bus 0 [ + ] generic_simple_bus |-- soc
serial 0 [ + ] serial_stm32 | |-- serial@40010000
...
video_brid 0 [ + ] stm32-display-dsi | |-- dsi@5a000000
dsi_host 0 [ + ] dw_mipi_dsi | | |-- dsihost
panel 0 [ + ] rm68200_panel | | `-- panel-dsi@0
...
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Add a Synopsys Designware MIPI DSI host bridge driver, based on the
Rockchip version from rockchip/dw-mipi-dsi.c with phy & bridge APIs.
Signed-off-by: Yannick Fertré <yannick.fertre@st.com>
