target/linux/bcm27xx/patches-5.4/950-0322-drm-vc4-Add-support-for-YUV-color-encodings-and-rang.patch

   1 From fb76c3ded8c771e8b9287d62b5e13666037f890e Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.org>
   3 Date: Tue, 17 Sep 2019 18:28:17 +0100
   4 Subject: [PATCH] drm/vc4: Add support for YUV color encodings and
   5  ranges
   6
   7 The BT601/BT709 color encoding and limited vs full
   8 range properties were not being exposed, defaulting
   9 always to BT601 limited range.
  10
  11 Expose the parameters and set the registers appropriately.
  12
  13 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
  14 ---
  15  drivers/gpu/drm/vc4/vc4_plane.c | 72 +++++++++++++++++++++++++++++++--
  16  drivers/gpu/drm/vc4/vc4_regs.h  |  3 ++
  17  2 files changed, 72 insertions(+), 3 deletions(-)
  18
  19 --- a/drivers/gpu/drm/vc4/vc4_plane.c
  20 +++ b/drivers/gpu/drm/vc4/vc4_plane.c
  21 @@ -585,6 +585,53 @@ static int vc4_plane_allocate_lbm(struct
  22         return 0;
  23  }
  24
  25 +/* The colorspace conversion matrices are held in 3 entries in the dlist.
  26 + * Create an array of them, with entries for each full and limited mode, and
  27 + * each supported colorspace.
  28 + */
  29 +#define VC4_LIMITED_RANGE      0
  30 +#define VC4_FULL_RANGE         1
  31 +
  32 +static const u32 colorspace_coeffs[2][DRM_COLOR_ENCODING_MAX][3] = {
  33 +       {
  34 +               /* Limited range */
  35 +               {
  36 +                       /* BT601 */
  37 +                       SCALER_CSC0_ITR_R_601_5,
  38 +                       SCALER_CSC1_ITR_R_601_5,
  39 +                       SCALER_CSC2_ITR_R_601_5,
  40 +               }, {
  41 +                       /* BT709 */
  42 +                       SCALER_CSC0_ITR_R_709_3,
  43 +                       SCALER_CSC1_ITR_R_709_3,
  44 +                       SCALER_CSC2_ITR_R_709_3,
  45 +               }, {
  46 +                       /* BT2020. Not supported yet - copy 601 */
  47 +                       SCALER_CSC0_ITR_R_601_5,
  48 +                       SCALER_CSC1_ITR_R_601_5,
  49 +                       SCALER_CSC2_ITR_R_601_5,
  50 +               }
  51 +       }, {
  52 +               /* Full range */
  53 +               {
  54 +                       /* JFIF */
  55 +                       SCALER_CSC0_JPEG_JFIF,
  56 +                       SCALER_CSC1_JPEG_JFIF,
  57 +                       SCALER_CSC2_JPEG_JFIF,
  58 +               }, {
  59 +                       /* BT709 */
  60 +                       SCALER_CSC0_ITR_R_709_3_FR,
  61 +                       SCALER_CSC1_ITR_R_709_3_FR,
  62 +                       SCALER_CSC2_ITR_R_709_3_FR,
  63 +               }, {
  64 +                       /* BT2020. Not supported yet - copy JFIF */
  65 +                       SCALER_CSC0_JPEG_JFIF,
  66 +                       SCALER_CSC1_JPEG_JFIF,
  67 +                       SCALER_CSC2_JPEG_JFIF,
  68 +               }
  69 +       }
  70 +};
  71 +
  72  /* Writes out a full display list for an active plane to the plane's
  73   * private dlist state.
  74   */
  75 @@ -864,9 +911,20 @@ static int vc4_plane_mode_set(struct drm
  76
  77         /* Colorspace conversion words */
  78         if (vc4_state->is_yuv) {
  79 -               vc4_dlist_write(vc4_state, SCALER_CSC0_ITR_R_601_5);
  80 -               vc4_dlist_write(vc4_state, SCALER_CSC1_ITR_R_601_5);
  81 -               vc4_dlist_write(vc4_state, SCALER_CSC2_ITR_R_601_5);
  82 +               enum drm_color_encoding color_encoding = state->color_encoding;
  83 +               enum drm_color_range color_range = state->color_range;
  84 +               const u32 *ccm;
  85 +
  86 +               if (color_encoding >= DRM_COLOR_ENCODING_MAX)
  87 +                       color_encoding = DRM_COLOR_YCBCR_BT601;
  88 +               if (color_range >= DRM_COLOR_RANGE_MAX)
  89 +                       color_range = DRM_COLOR_YCBCR_LIMITED_RANGE;
  90 +
  91 +               ccm = colorspace_coeffs[color_range][color_encoding];
  92 +
  93 +               vc4_dlist_write(vc4_state, ccm[0]);
  94 +               vc4_dlist_write(vc4_state, ccm[1]);
  95 +               vc4_dlist_write(vc4_state, ccm[2]);
  96         }
  97
  98         vc4_state->lbm_offset = 0;
  99 @@ -1275,5 +1333,13 @@ struct drm_plane *vc4_plane_init(struct
 100                                            DRM_MODE_REFLECT_X |
 101                                            DRM_MODE_REFLECT_Y);
 102
 103 +       drm_plane_create_color_properties(plane,
 104 +                                         BIT(DRM_COLOR_YCBCR_BT601) |
 105 +                                         BIT(DRM_COLOR_YCBCR_BT709),
 106 +                                         BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
 107 +                                         BIT(DRM_COLOR_YCBCR_FULL_RANGE),
 108 +                                         DRM_COLOR_YCBCR_BT709,
 109 +                                         DRM_COLOR_YCBCR_LIMITED_RANGE);
 110 +
 111         return plane;
 112  }
 113 --- a/drivers/gpu/drm/vc4/vc4_regs.h
 114 +++ b/drivers/gpu/drm/vc4/vc4_regs.h
 115 @@ -950,6 +950,7 @@ enum hvs_pixel_format {
 116  #define SCALER_CSC0_ITR_R_601_5                        0x00f00000
 117  #define SCALER_CSC0_ITR_R_709_3                        0x00f00000
 118  #define SCALER_CSC0_JPEG_JFIF                  0x00000000
 119 +#define SCALER_CSC0_ITR_R_709_3_FR             0x00000000
 120
 121  /* S2.8 contribution of Cb to Green */
 122  #define SCALER_CSC1_COEF_CB_GRN_MASK           VC4_MASK(31, 22)
 123 @@ -966,6 +967,7 @@ enum hvs_pixel_format {
 124  #define SCALER_CSC1_ITR_R_601_5                        0xe73304a8
 125  #define SCALER_CSC1_ITR_R_709_3                        0xf2b784a8
 126  #define SCALER_CSC1_JPEG_JFIF                  0xea34a400
 127 +#define SCALER_CSC1_ITR_R_709_3_FR             0xe23d0400
 128
 129  /* S2.8 contribution of Cb to Red */
 130  #define SCALER_CSC2_COEF_CB_RED_MASK           VC4_MASK(29, 20)
 131 @@ -979,6 +981,7 @@ enum hvs_pixel_format {
 132  #define SCALER_CSC2_ITR_R_601_5                        0x00066204
 133  #define SCALER_CSC2_ITR_R_709_3                        0x00072a1c
 134  #define SCALER_CSC2_JPEG_JFIF                  0x000599c5
 135 +#define SCALER_CSC2_ITR_R_709_3_FR             0x00064ddb
 136
 137  #define SCALER_TPZ0_VERT_RECALC                        BIT(31)
 138  #define SCALER_TPZ0_SCALE_MASK                 VC4_MASK(28, 8)