CHROMIUM: drm/exynos: Fix dithering.

There is only one dithering engine globally and it should always use
the settings for the root window.

BUG=chromium-os:37030
TEST=manually on daisy

Change-Id: Ic85805afc9410fc72be52da5916942b8187a07ed
Signed-off-by: Haixia Shi <hshi@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/39358
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index 7bb76eab18c5e40a065d600f9af197f70f3024eb..e81ee85484330df1ea4102b4893b1554209848d5 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -585,7 +585,9 @@ static void fimd_win_commit(void *ctx, int zpos)
        val |= WINCONx_ENWIN;
        writel(val, fimd_ctx->regs + WINCON(win));
 
-       mie_set_6bit_dithering(fimd_ctx, win);
+       /* only apply dithering on hardware window 0. */
+       if (win == 0)
+               mie_set_6bit_dithering(fimd_ctx, win);
 
        /* Enable DMA channel and unprotect windows */
        val = readl(fimd_ctx->regs + SHADOWCON);