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drm/vc4: Fix which value is being used for source image size.

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This doesn't matter yet since we only allow 1:1 scaling, but the
comment clearly says we should be using the source size.

Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Eric Anholt 2015-12-28 14:45:25 -08:00
parent fc2d6f1eab
commit f863e35601
1 changed files with 14 additions and 9 deletions
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23
drivers/gpu/drm/vc4/vc4_plane.c
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@ -47,6 +47,8 @@ struct vc4_plane_state {
/* Clipped coordinates of the plane on the display. */
int crtc_x, crtc_y, crtc_w, crtc_h;
/* Clipped size of the area scanned from in the FB. */
u32 src_w, src_h;
/* Offset to start scanning out from the start of the plane's
* BO.
@ -170,11 +172,6 @@ static int vc4_plane_setup_clipping_and_scaling(struct drm_plane_state *state)
vc4_state->offset = fb->offsets[0];
vc4_state->crtc_x = state->crtc_x;
vc4_state->crtc_y = state->crtc_y;
vc4_state->crtc_w = state->crtc_w;
vc4_state->crtc_h = state->crtc_h;
if (state->crtc_w << 16 != state->src_w ||
state->crtc_h << 16 != state->src_h) {
/* We don't support scaling yet, which involves
@ -185,17 +182,25 @@ static int vc4_plane_setup_clipping_and_scaling(struct drm_plane_state *state)
return -EINVAL;
}
vc4_state->src_w = state->src_w >> 16;
vc4_state->src_h = state->src_h >> 16;
vc4_state->crtc_x = state->crtc_x;
vc4_state->crtc_y = state->crtc_y;
vc4_state->crtc_w = state->crtc_w;
vc4_state->crtc_h = state->crtc_h;
if (vc4_state->crtc_x < 0) {
vc4_state->offset += (drm_format_plane_cpp(fb->pixel_format,
0) *
-vc4_state->crtc_x);
vc4_state->crtc_w += vc4_state->crtc_x;
vc4_state->src_w += vc4_state->crtc_x;
vc4_state->crtc_x = 0;
}
if (vc4_state->crtc_y < 0) {
vc4_state->offset += fb->pitches[0] * -vc4_state->crtc_y;
vc4_state->crtc_h += vc4_state->crtc_y;
vc4_state->src_h += vc4_state->crtc_y;
vc4_state->crtc_y = 0;
}
@ -244,8 +249,8 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
SCALER_POS2_ALPHA_MODE_PIPELINE :
SCALER_POS2_ALPHA_MODE_FIXED,
SCALER_POS2_ALPHA_MODE) |
VC4_SET_FIELD(vc4_state->crtc_w, SCALER_POS2_WIDTH) |
VC4_SET_FIELD(vc4_state->crtc_h, SCALER_POS2_HEIGHT));
VC4_SET_FIELD(vc4_state->src_w, SCALER_POS2_WIDTH) |
VC4_SET_FIELD(vc4_state->src_h, SCALER_POS2_HEIGHT));
/* Position Word 3: Context. Written by the HVS. */
vc4_dlist_write(vc4_state, 0xc0c0c0c0);