| Message ID | 20250304101530.969920-1-victor.liu@nxp.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | drm/bridge: simple-bridge: Add DPI color encoder support | expand |
Hi, Am Dienstag, 4. März 2025, 11:15:25 CET schrieb Liu Ying: > Hi, > > This patch series aims to add DPI color encoder support as a simple DRM > bridge. A DPI color encoder simply converts input DPI color coding to > output DPI color coding, like Adafruit Kippah DPI hat[1] which converts > input 18-bit pixel data to 24-bit pixel data(with 2 low padding bits in > every color component though). A real use case is that NXP i.MX93 11x11 > EVK[2] and i.MX93 9x9 QSB[3] boards may connect a 24-bit DPI panel through > the Adafruit Kippah DPI hat. The display pipeline is > > i.MX93 LCDIF display controller(RGB888) -> > i.MX93 parallel display format configuration(RGB666) -> > on-board Raspiberry Pi compatible interface(RPi)(RGB666) -> > Adafruit Kippah DPI hat(RGB888 with 2 low padding bits in color components) -> > 24-bit "ontat,kd50g21-40nt-a1" DPI panel > > [1] https://learn.adafruit.com/adafruit-dpi-display-kippah-ttl-tft/downloads > [2] https://www.nxp.com/design/design-center/development-boards-and-designs/i.MX93EVK > [3] https://www.nxp.com/design/design-center/development-boards-and-designs/IMX93QSB Thanks for this series. Actually I was about to create a similar (dumb) bridge. My use case is wrong wiring on hardware for DPI displays. The current workaround was to use a "new" display compatible with bus_format changes from MEDIA_BUS_FMT_RGB666_1X18 -> MEDIA_BUS_FMT_RGB888_1X24. I added this new bridge and changed my DT and it works flawlessly. Best regards Alexander > Liu Ying (5): > dt-bindings: display: Document DPI color codings > drm/of: Add drm_of_dpi_get_color_coding() > dt-bindings: display: simple-bridge: Document DPI color encoder > drm/bridge: simple-bridge: Add DPI color encoder support > drm/bridge: simple-bridge: Add next panel support > > .../display/bridge/simple-bridge.yaml | 89 +++++++++++- > .../bindings/display/dpi-color-coding.yaml | 90 ++++++++++++ > drivers/gpu/drm/bridge/Kconfig | 1 + > drivers/gpu/drm/bridge/simple-bridge.c | 132 ++++++++++++++++-- > drivers/gpu/drm/drm_of.c | 43 ++++++ > include/drm/drm_of.h | 7 + > 6 files changed, 348 insertions(+), 14 deletions(-) > create mode 100644 Documentation/devicetree/bindings/display/dpi-color-coding.yaml > >