target/linux/brcm2708/patches-4.4/0284-drm-vc4-Fix-which-value-is-being-used-for-source-ima.patch

   1 From 309b7268e9cc7baa21d195cc98387cb984720185 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 284/304] drm/vc4: Fix which value is being used for source
   5  image size.
   6
   7 This doesn't matter yet since we only allow 1:1 scaling, but the
   8 comment clearly says we should be using the source size.
   9
  10 Signed-off-by: Eric Anholt <eric@anholt.net>
  11 (cherry picked from commit f863e356013d628fa65b1cd89aa298eed26fc936)
  12 ---
  13  drivers/gpu/drm/vc4/vc4_plane.c | 23 ++++++++++++++---------
  14  1 file changed, 14 insertions(+), 9 deletions(-)
  15
  16 --- a/drivers/gpu/drm/vc4/vc4_plane.c
  17 +++ b/drivers/gpu/drm/vc4/vc4_plane.c
  18 @@ -47,6 +47,8 @@ struct vc4_plane_state {
  19
  20         /* Clipped coordinates of the plane on the display. */
  21         int crtc_x, crtc_y, crtc_w, crtc_h;
  22 +       /* Clipped size of the area scanned from in the FB. */
  23 +       u32 src_w, src_h;
  24
  25         /* Offset to start scanning out from the start of the plane's
  26          * BO.
  27 @@ -186,11 +188,6 @@ static int vc4_plane_setup_clipping_and_
  28
  29         vc4_state->offset = fb->offsets[0];
  30
  31 -       vc4_state->crtc_x = state->crtc_x;
  32 -       vc4_state->crtc_y = state->crtc_y;
  33 -       vc4_state->crtc_w = state->crtc_w;
  34 -       vc4_state->crtc_h = state->crtc_h;
  35 -
  36         if (state->crtc_w << 16 != state->src_w ||
  37             state->crtc_h << 16 != state->src_h) {
  38                 /* We don't support scaling yet, which involves
  39 @@ -201,17 +198,25 @@ static int vc4_plane_setup_clipping_and_
  40                 return -EINVAL;
  41         }
  42
  43 +       vc4_state->src_w = state->src_w >> 16;
  44 +       vc4_state->src_h = state->src_h >> 16;
  45 +
  46 +       vc4_state->crtc_x = state->crtc_x;
  47 +       vc4_state->crtc_y = state->crtc_y;
  48 +       vc4_state->crtc_w = state->crtc_w;
  49 +       vc4_state->crtc_h = state->crtc_h;
  50 +
  51         if (vc4_state->crtc_x < 0) {
  52                 vc4_state->offset += (drm_format_plane_cpp(fb->pixel_format,
  53                                                            0) *
  54                                       -vc4_state->crtc_x);
  55 -               vc4_state->crtc_w += vc4_state->crtc_x;
  56 +               vc4_state->src_w += vc4_state->crtc_x;
  57                 vc4_state->crtc_x = 0;
  58         }
  59
  60         if (vc4_state->crtc_y < 0) {
  61                 vc4_state->offset += fb->pitches[0] * -vc4_state->crtc_y;
  62 -               vc4_state->crtc_h += vc4_state->crtc_y;
  63 +               vc4_state->src_h += vc4_state->crtc_y;
  64                 vc4_state->crtc_y = 0;
  65         }
  66
  67 @@ -260,8 +265,8 @@ static int vc4_plane_mode_set(struct drm
  68                                       SCALER_POS2_ALPHA_MODE_PIPELINE :
  69                                       SCALER_POS2_ALPHA_MODE_FIXED,
  70                                       SCALER_POS2_ALPHA_MODE) |
  71 -                       VC4_SET_FIELD(vc4_state->crtc_w, SCALER_POS2_WIDTH) |
  72 -                       VC4_SET_FIELD(vc4_state->crtc_h, SCALER_POS2_HEIGHT));
  73 +                       VC4_SET_FIELD(vc4_state->src_w, SCALER_POS2_WIDTH) |
  74 +                       VC4_SET_FIELD(vc4_state->src_h, SCALER_POS2_HEIGHT));
  75
  76         /* Position Word 3: Context.  Written by the HVS. */
  77         vc4_dlist_write(vc4_state, 0xc0c0c0c0);