From: Ville Syrjälä <ville.syrjala@xxxxxxxxx>
If the scaling ratio is below 0.5 video output width can't be identical
to the display width. Reject such settings.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxx>
---
drivers/video/omap2/dss/dispc.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
index e2e0f9a..de8bfba 100644
--- a/drivers/video/omap2/dss/dispc.c
+++ b/drivers/video/omap2/dss/dispc.c
@@ -1454,7 +1454,10 @@ static unsigned long calc_fclk_five_taps(u16 width, u16 height,
do_div(tmp, 2 * out_height * ppl);
fclk = tmp;
- if (height > 2 * out_height && ppl != out_width) {
+ if (height > 2 * out_height) {
+ if (ppl == out_width)
+ return 0;
+
tmp = pclk * (height - 2 * out_height) * out_width;
do_div(tmp, 2 * out_height * (ppl - out_width));
fclk = max(fclk, (u32) tmp);
@@ -1634,7 +1637,7 @@ static int _dispc_setup_plane(enum omap_plane plane,
DSSDBG("required fclk rate = %lu Hz\n", fclk);
DSSDBG("current fclk rate = %lu Hz\n", dispc_fclk_rate());
- if (fclk > dispc_fclk_rate()) {
+ if (!fclk || fclk > dispc_fclk_rate()) {
DSSERR("failed to set up scaling, "
"required fclk rate = %lu Hz, "
"current fclk rate = %lu Hz\n",
--
1.6.5
--
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