target/linux/bcm27xx/patches-5.15/950-0596-drm-vc4-dpi-Add-option-for-inverting-pixel-clock-and.patch

   1 From e664a91ea54b3488d6c08dd82dac2af1239c3275 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Thu, 2 Dec 2021 18:21:46 +0000
   4 Subject: [PATCH] drm/vc4: dpi: Add option for inverting pixel clock
   5  and output enable
   6
   7 DRM provides flags for inverting pixel clock and output enable
   8 signals, but these were not mapped to the relevant registers.
   9
  10 Add those mappings.
  11
  12 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  13 ---
  14  drivers/gpu/drm/vc4/vc4_dpi.c | 89 ++++++++++++++++++++---------------
  15  1 file changed, 51 insertions(+), 38 deletions(-)
  16
  17 --- a/drivers/gpu/drm/vc4/vc4_dpi.c
  18 +++ b/drivers/gpu/drm/vc4/vc4_dpi.c
  19 @@ -148,45 +148,58 @@ static void vc4_dpi_encoder_enable(struc
  20         }
  21         drm_connector_list_iter_end(&conn_iter);
  22
  23 -       if (connector && connector->display_info.num_bus_formats) {
  24 -               u32 bus_format = connector->display_info.bus_formats[0];
  25 +       if (connector) {
  26 +               if (connector->display_info.num_bus_formats) {
  27 +                       u32 bus_format = connector->display_info.bus_formats[0];
  28
  29 -               switch (bus_format) {
  30 -               case MEDIA_BUS_FMT_RGB888_1X24:
  31 -                       dpi_c |= VC4_SET_FIELD(DPI_FORMAT_24BIT_888_RGB,
  32 -                                              DPI_FORMAT);
  33 -                       break;
  34 -               case MEDIA_BUS_FMT_BGR888_1X24:
  35 -                       dpi_c |= VC4_SET_FIELD(DPI_FORMAT_24BIT_888_RGB,
  36 -                                              DPI_FORMAT);
  37 -                       dpi_c |= VC4_SET_FIELD(DPI_ORDER_BGR, DPI_ORDER);
  38 -                       break;
  39 -               case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
  40 -                       dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_2,
  41 -                                              DPI_FORMAT);
  42 -                       break;
  43 -               case MEDIA_BUS_FMT_BGR666_1X24_CPADHI:
  44 -                       dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_2,
  45 -                                              DPI_FORMAT);
  46 -                       dpi_c |= VC4_SET_FIELD(DPI_ORDER_BGR, DPI_ORDER);
  47 -                       break;
  48 -               case MEDIA_BUS_FMT_RGB666_1X18:
  49 -                       dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_1,
  50 -                                              DPI_FORMAT);
  51 -                       break;
  52 -               case MEDIA_BUS_FMT_BGR666_1X18:
  53 -                       dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_1,
  54 -                                              DPI_FORMAT);
  55 -                       dpi_c |= VC4_SET_FIELD(DPI_ORDER_BGR, DPI_ORDER);
  56 -                       break;
  57 -               case MEDIA_BUS_FMT_RGB565_1X16:
  58 -                       dpi_c |= VC4_SET_FIELD(DPI_FORMAT_16BIT_565_RGB_3,
  59 -                                              DPI_FORMAT);
  60 -                       break;
  61 -               default:
  62 -                       DRM_ERROR("Unknown media bus format %d\n", bus_format);
  63 -                       break;
  64 +                       switch (bus_format) {
  65 +                       case MEDIA_BUS_FMT_RGB888_1X24:
  66 +                               dpi_c |= VC4_SET_FIELD(DPI_FORMAT_24BIT_888_RGB,
  67 +                                                      DPI_FORMAT);
  68 +                               break;
  69 +                       case MEDIA_BUS_FMT_BGR888_1X24:
  70 +                               dpi_c |= VC4_SET_FIELD(DPI_FORMAT_24BIT_888_RGB,
  71 +                                                      DPI_FORMAT);
  72 +                               dpi_c |= VC4_SET_FIELD(DPI_ORDER_BGR,
  73 +                                                      DPI_ORDER);
  74 +                               break;
  75 +                       case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
  76 +                               dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_2,
  77 +                                                      DPI_FORMAT);
  78 +                               break;
  79 +                       case MEDIA_BUS_FMT_BGR666_1X24_CPADHI:
  80 +                               dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_2,
  81 +                                                      DPI_FORMAT);
  82 +                               dpi_c |= VC4_SET_FIELD(DPI_ORDER_BGR,
  83 +                                                      DPI_ORDER);
  84 +                               break;
  85 +                       case MEDIA_BUS_FMT_RGB666_1X18:
  86 +                               dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_1,
  87 +                                                      DPI_FORMAT);
  88 +                               break;
  89 +                       case MEDIA_BUS_FMT_BGR666_1X18:
  90 +                               dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_1,
  91 +                                                      DPI_FORMAT);
  92 +                               dpi_c |= VC4_SET_FIELD(DPI_ORDER_BGR,
  93 +                                                      DPI_ORDER);
  94 +                               break;
  95 +                       case MEDIA_BUS_FMT_RGB565_1X16:
  96 +                               dpi_c |= VC4_SET_FIELD(DPI_FORMAT_16BIT_565_RGB_3,
  97 +                                                      DPI_FORMAT);
  98 +                               break;
  99 +                       default:
 100 +                               DRM_ERROR("Unknown media bus format %d\n",
 101 +                                         bus_format);
 102 +                               break;
 103 +                       }
 104                 }
 105 +
 106 +               if (connector->display_info.bus_flags &
 107 +                                       DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)
 108 +                       dpi_c |= DPI_PIXEL_CLK_INVERT;
 109 +
 110 +               if (connector->display_info.bus_flags & DRM_BUS_FLAG_DE_LOW)
 111 +                       dpi_c |= DPI_OUTPUT_ENABLE_INVERT;
 112         } else {
 113                 /* Default to 18bit if no connector found. */
 114                 dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_1, DPI_FORMAT);