drm: bridge: icn6211: Disable DPI color swap

The chip is capable of swapping DPI RGB channels. The driver currently
does not implement support for this functionality. Write the MIPI_PN_SWAP
register to 0 to assure the color swap is disabled.

Acked-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Jagan Teki <jagan@amarulasolutions.com>
Cc: Maxime Ripard <maxime@cerno.tech>
Cc: Robert Foss <robert.foss@linaro.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
To: dri-devel@lists.freedesktop.org
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220331150509.9838-7-marex@denx.de

diff --git a/drivers/gpu/drm/bridge/chipone-icn6211.c b/drivers/gpu/drm/bridge/chipone-icn6211.c
index e3a7b945a0ef500ef4a470d4edfe3e5120232c5c..4d6baef7ce16c6f3eae1dd8dd536569e6524d36f 100644 (file)
--- a/drivers/gpu/drm/bridge/chipone-icn6211.c
+++ b/drivers/gpu/drm/bridge/chipone-icn6211.c
@@ -296,6 +296,7 @@ static void chipone_atomic_enable(struct drm_bridge *bridge,
        ICN6211_DSI(icn, HFP_MIN, hfp & 0xff);
        ICN6211_DSI(icn, MIPI_PD_CK_LANE, 0xa0);
        ICN6211_DSI(icn, PLL_CTRL(12), 0xff);
+       ICN6211_DSI(icn, MIPI_PN_SWAP, 0x00);
 
        /* DPI HS/VS/DE polarity */
        pol = ((mode->flags & DRM_MODE_FLAG_PHSYNC) ? BIST_POL_HSYNC_POL : 0) |