git.openwrt.org Git - openwrt/staging/xback.git/blob

   1 From 1c22021723d142524d744f6e2a6d81fc39b1b366 Mon Sep 17 00:00:00 2001
   2 From: Chris Morgan <macromorgan@hotmail.com>
   3 Date: Fri, 28 Jan 2022 17:39:54 -0600
   4 Subject: [PATCH] drm/vc4: dpi: Support DPI interface in mode3 for
   5  RGB565
   6
   7 Add support for the VC4 DPI driver to utilize DPI mode 3. This is
   8 defined here as xxxRRRRRxxGGGGGGxxxBBBBB:
   9 https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#parallel-display-interface-dpi
  10
  11 This mode is required to use the Geekworm MZP280 DPI display.
  12
  13 Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
  14 Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  15 ---
  16  drivers/gpu/drm/vc4/vc4_dpi.c | 4 ++++
  17  1 file changed, 4 insertions(+)
  18
  19 --- a/drivers/gpu/drm/vc4/vc4_dpi.c
  20 +++ b/drivers/gpu/drm/vc4/vc4_dpi.c
  21 @@ -188,6 +188,10 @@ static void vc4_dpi_encoder_enable(struc
  22                                 dpi_c |= VC4_SET_FIELD(DPI_FORMAT_16BIT_565_RGB_1,
  23                                                        DPI_FORMAT);
  24                                 break;
  25 +                       case MEDIA_BUS_FMT_RGB565_1X24_CPADHI:
  26 +                               dpi_c |= VC4_SET_FIELD(DPI_FORMAT_16BIT_565_RGB_2,
  27 +                                                      DPI_FORMAT);
  28 +                               break;
  29                         default:
  30                                 DRM_ERROR("Unknown media bus format %d\n",
  31                                           bus_format);