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| author | Ville Syrjälä <ville.syrjala@nokia.com> | 2010-01-08 11:56:41 +0200 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@nokia.com> | 2010-01-12 12:10:19 +0200 |
| commit | 2d9c5597ad1408885fdef5838aa27a8a0ee9e915 (patch) | |
| tree | 896ac2b767482c64802068232705c2298515fdae /drivers | |
| parent | 24be78b32f0a6e14aead3eac89d768a361b091b3 (diff) | |
| download | linux-stable-2d9c5597ad1408885fdef5838aa27a8a0ee9e915.tar.gz linux-stable-2d9c5597ad1408885fdef5838aa27a8a0ee9e915.tar.bz2 linux-stable-2d9c5597ad1408885fdef5838aa27a8a0ee9e915.zip | |
OMAP: DSS2: Reject scaling settings when they cannot be supported
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@nokia.com>
Acked-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | 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 e2e0f9ae7353..de8bfbac9e26 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", |