target/linux/brcm2708/patches-4.4/0280-drm-vc4-Fix-which-value-is-being-used-for-source-ima.patch

   1 From 567ed250293747ceb5413faba8ae1f6c3d207bee Mon Sep 17 00:00:00 2001
   2 From: Eric Anholt <eric@anholt.net>
   3 Date: Mon, 28 Dec 2015 14:45:25 -0800
   4 Subject: [PATCH] drm/vc4: Fix which value is being used for source image size.
   5
   6 This doesn't matter yet since we only allow 1:1 scaling, but the
   7 comment clearly says we should be using the source size.
   8
   9 Signed-off-by: Eric Anholt <eric@anholt.net>
  10 (cherry picked from commit f863e356013d628fa65b1cd89aa298eed26fc936)
  11 ---
  12  drivers/gpu/drm/vc4/vc4_plane.c | 23 ++++++++++++++---------
  13  1 file changed, 14 insertions(+), 9 deletions(-)
  14
  15 --- a/drivers/gpu/drm/vc4/vc4_plane.c
  16 +++ b/drivers/gpu/drm/vc4/vc4_plane.c
  17 @@ -47,6 +47,8 @@ struct vc4_plane_state {
  18
  19         /* Clipped coordinates of the plane on the display. */
  20         int crtc_x, crtc_y, crtc_w, crtc_h;
  21 +       /* Clipped size of the area scanned from in the FB. */
  22 +       u32 src_w, src_h;
  23
  24         /* Offset to start scanning out from the start of the plane's
  25          * BO.
  26 @@ -186,11 +188,6 @@ static int vc4_plane_setup_clipping_and_
  27
  28         vc4_state->offset = fb->offsets[0];
  29
  30 -       vc4_state->crtc_x = state->crtc_x;
  31 -       vc4_state->crtc_y = state->crtc_y;
  32 -       vc4_state->crtc_w = state->crtc_w;
  33 -       vc4_state->crtc_h = state->crtc_h;
  34 -
  35         if (state->crtc_w << 16 != state->src_w ||
  36             state->crtc_h << 16 != state->src_h) {
  37                 /* We don't support scaling yet, which involves
  38 @@ -201,17 +198,25 @@ static int vc4_plane_setup_clipping_and_
  39                 return -EINVAL;
  40         }
  41
  42 +       vc4_state->src_w = state->src_w >> 16;
  43 +       vc4_state->src_h = state->src_h >> 16;
  44 +
  45 +       vc4_state->crtc_x = state->crtc_x;
  46 +       vc4_state->crtc_y = state->crtc_y;
  47 +       vc4_state->crtc_w = state->crtc_w;
  48 +       vc4_state->crtc_h = state->crtc_h;
  49 +
  50         if (vc4_state->crtc_x < 0) {
  51                 vc4_state->offset += (drm_format_plane_cpp(fb->pixel_format,
  52                                                            0) *
  53                                       -vc4_state->crtc_x);
  54 -               vc4_state->crtc_w += vc4_state->crtc_x;
  55 +               vc4_state->src_w += vc4_state->crtc_x;
  56                 vc4_state->crtc_x = 0;
  57         }
  58
  59         if (vc4_state->crtc_y < 0) {
  60                 vc4_state->offset += fb->pitches[0] * -vc4_state->crtc_y;
  61 -               vc4_state->crtc_h += vc4_state->crtc_y;
  62 +               vc4_state->src_h += vc4_state->crtc_y;
  63                 vc4_state->crtc_y = 0;
  64         }
  65
  66 @@ -260,8 +265,8 @@ static int vc4_plane_mode_set(struct drm
  67                                       SCALER_POS2_ALPHA_MODE_PIPELINE :
  68                                       SCALER_POS2_ALPHA_MODE_FIXED,
  69                                       SCALER_POS2_ALPHA_MODE) |
  70 -                       VC4_SET_FIELD(vc4_state->crtc_w, SCALER_POS2_WIDTH) |
  71 -                       VC4_SET_FIELD(vc4_state->crtc_h, SCALER_POS2_HEIGHT));
  72 +                       VC4_SET_FIELD(vc4_state->src_w, SCALER_POS2_WIDTH) |
  73 +                       VC4_SET_FIELD(vc4_state->src_h, SCALER_POS2_HEIGHT));
  74
  75         /* Position Word 3: Context.  Written by the HVS. */
  76         vc4_dlist_write(vc4_state, 0xc0c0c0c0);