While the VP (video processor) supports arbitrary scaling of its input, the mixer just supports a simple 2x (line doubling) scaling. Expose this functionality and exit early when an unsupported scaling configuration is encountered.
This was tested with modetest's DRM plane test (from the libdrm test suite) on an Odroid-X2 (Exynos4412).
Signed-off-by: Tobias Jakobi tjakobi@math.uni-bielefeld.de --- drivers/gpu/drm/exynos/exynos_mixer.c | 35 +++++++++++++++++++++++++++++------ 1 file changed, 29 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c index 5ab0e32..6822b36 100644 --- a/drivers/gpu/drm/exynos/exynos_mixer.c +++ b/drivers/gpu/drm/exynos/exynos_mixer.c @@ -499,12 +499,36 @@ static void mixer_layer_update(struct mixer_context *ctx) mixer_reg_writemask(res, MXR_CFG, ~0, MXR_CFG_LAYER_UPDATE); }
+static int mixer_setup_scale(const struct exynos_drm_plane *plane, + unsigned int *x_ratio, unsigned int *y_ratio) +{ + if (plane->crtc_width != plane->src_width) { + if (plane->crtc_width == 2 * plane->src_width) + *x_ratio = 1; + else + goto fail; + } + + if (plane->crtc_height != plane->src_height) { + if (plane->crtc_height == 2 * plane->src_height) + *y_ratio = 1; + else + goto fail; + } + + return 0; + +fail: + DRM_DEBUG_KMS("only 2x width/height scaling of plane supported\n"); + return -ENOTSUPP; +} + static void mixer_graph_buffer(struct mixer_context *ctx, int win) { struct mixer_resources *res = &ctx->mixer_res; unsigned long flags; struct exynos_drm_plane *plane; - unsigned int x_ratio, y_ratio; + unsigned int x_ratio = 0, y_ratio = 0; unsigned int src_x_offset, src_y_offset, dst_x_offset, dst_y_offset; dma_addr_t dma_addr; unsigned int fmt; @@ -528,9 +552,8 @@ static void mixer_graph_buffer(struct mixer_context *ctx, int win) fmt = ARGB8888; }
- /* 2x scaling feature */ - x_ratio = 0; - y_ratio = 0; + /* check if mixer supports requested scaling setup */ + if (mixer_setup_scale(plane, &x_ratio, &y_ratio)) return;
dst_x_offset = plane->crtc_x; dst_y_offset = plane->crtc_y; @@ -566,8 +589,8 @@ static void mixer_graph_buffer(struct mixer_context *ctx, int win) mixer_reg_write(res, MXR_RESOLUTION, val); }
- val = MXR_GRP_WH_WIDTH(plane->crtc_width); - val |= MXR_GRP_WH_HEIGHT(plane->crtc_height); + val = MXR_GRP_WH_WIDTH(plane->src_width); + val |= MXR_GRP_WH_HEIGHT(plane->src_height); val |= MXR_GRP_WH_H_SCALE(x_ratio); val |= MXR_GRP_WH_V_SCALE(y_ratio); mixer_reg_write(res, MXR_GRAPHIC_WH(win), val);