On 22/04/2021 00:31, Marek Vasut wrote:
Add driver for TI SN65DSI83 Single-link DSI to Single-link LVDS bridge
and TI SN65DSI84 Single-link DSI to Dual-link or 2x Single-link LVDS
bridge. TI SN65DSI85 is unsupported due to lack of hardware to test on,
but easy to add.
The driver operates the chip via I2C bus. Currently the LVDS clock are
always derived from DSI clock lane, which is the usual mode of operation.
Support for clock from external oscillator is not implemented, but it is
easy to add if ever needed. Only RGB888 pixel format is implemented, the
LVDS666 is not supported, but could be added if needed.
Signed-off-by: Marek Vasut <marex@xxxxxxx>
Cc: Douglas Anderson <dianders@xxxxxxxxxxxx>
Cc: Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx>
Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
Cc: Philippe Schenker <philippe.schenker@xxxxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Stephen Boyd <swboyd@xxxxxxxxxxxx>
Cc: Valentin Raevsky <valentin@xxxxxxxxxxxxxx>
To: dri-devel@xxxxxxxxxxxxxxxxxxxxx
---
V2: - Use dev_err_probe()
- Set REG_RC_RESET as volatile
- Wait for PLL stabilization by polling REG_RC_LVDS_PLL
- Use ctx->mode = *adj instead of *mode in sn65dsi83_mode_set
- Add tested DSI84 support in dual-link mode
- Correctly set VCOM
- Fill in missing DSI CHB and LVDS CHB bits from DSI84 and DSI85
datasheets, with that all the reserved bits make far more sense
as the DSI83 and DSI84 seems to be reduced version of DSI85
---
drivers/gpu/drm/bridge/Kconfig | 10 +
drivers/gpu/drm/bridge/Makefile | 1 +
drivers/gpu/drm/bridge/ti-sn65dsi83.c | 617 ++++++++++++++++++++++++++
3 files changed, 628 insertions(+)
create mode 100644 drivers/gpu/drm/bridge/ti-sn65dsi83.c
Tested on MSC-SM2S-IMX8MINI module with a 1024x768 (VESA-24) single LVDS
channel panel.
Tested-by: Loic Poulain <loic.poulain@xxxxxxxxxx>
Loic
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