diff options
| author | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2011-09-01 08:20:45 +0100 |
|---|---|---|
| committer | Andy Green <andy.green@linaro.org> | 2011-09-01 08:20:45 +0100 |
| commit | a6871e8f1f3c906b37884fb35837546b7c1dc15e (patch) | |
| tree | ab4677863600acf7476258e66e2c5d46232ac863 /drivers/video/omap2/dss/dss_features.c | |
| parent | 19a63ba5a43b026d79ccc526a5c5efc20f3006f1 (diff) | |
OMAP: DSS2: DISPC: Fix minimum PCD valuetilt-3.0-nodspvideo1-11-09-01
The current driver had a hardcoded minimum value of 2 for pixel clock
divisor (PCD). This doesn't seem to be right.
OMAP4 TRM says that PCD can be 1 when not downscaling, and inverted
pixel clock (IPC) is off.
OMAP3 TRM says the same, but also in the register descriptions that PCD
value 1 is invalid.
OMAP2 TRM says PCD 2 is the minimum.
OMAP2 is still untested, but for both OMAP3 and OMAP4 PCD of 1 seems to
work fine.
This patch adds a new DSS feature, FEAT_PARAM_DSS_PCD, which is used to
find the minimum and maximum PCD. The minimum is set to 2 for OMAP2, and
1 for OMAP3/4.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video/omap2/dss/dss_features.c')
| -rw-r--r-- | drivers/video/omap2/dss/dss_features.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/dss_features.c b/drivers/video/omap2/dss/dss_features.c index 1c18888e5df..77c6f4717e0 100644 --- a/drivers/video/omap2/dss/dss_features.c +++ b/drivers/video/omap2/dss/dss_features.c @@ -230,6 +230,7 @@ static const char * const omap4_dss_clk_source_names[] = { static const struct dss_param_range omap2_dss_param_range[] = { [FEAT_PARAM_DSS_FCK] = { 0, 173000000 }, + [FEAT_PARAM_DSS_PCD] = { 2, 255 }, [FEAT_PARAM_DSIPLL_REGN] = { 0, 0 }, [FEAT_PARAM_DSIPLL_REGM] = { 0, 0 }, [FEAT_PARAM_DSIPLL_REGM_DISPC] = { 0, 0 }, @@ -240,6 +241,7 @@ static const struct dss_param_range omap2_dss_param_range[] = { static const struct dss_param_range omap3_dss_param_range[] = { [FEAT_PARAM_DSS_FCK] = { 0, 173000000 }, + [FEAT_PARAM_DSS_PCD] = { 1, 255 }, [FEAT_PARAM_DSIPLL_REGN] = { 0, (1 << 7) - 1 }, [FEAT_PARAM_DSIPLL_REGM] = { 0, (1 << 11) - 1 }, [FEAT_PARAM_DSIPLL_REGM_DISPC] = { 0, (1 << 4) - 1 }, @@ -250,6 +252,7 @@ static const struct dss_param_range omap3_dss_param_range[] = { static const struct dss_param_range omap4_dss_param_range[] = { [FEAT_PARAM_DSS_FCK] = { 0, 186000000 }, + [FEAT_PARAM_DSS_PCD] = { 1, 255 }, [FEAT_PARAM_DSIPLL_REGN] = { 0, (1 << 8) - 1 }, [FEAT_PARAM_DSIPLL_REGM] = { 0, (1 << 12) - 1 }, [FEAT_PARAM_DSIPLL_REGM_DISPC] = { 0, (1 << 5) - 1 }, |