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authorJim Lodes <jim.lodes@garmin.com>2016-04-21 12:27:49 -0500
committerTomi Valkeinen <tomi.valkeinen@ti.com>2016-05-31 08:20:43 +0300
commit4bafcbc77fb0b26b0052dbd577ccc888a63e6404 (patch)
treec6cf8c8f7142718a62710e3cdd767a17f9b1729a /drivers/video/fbdev/omap2/omapfb/dss
parent08f707ac3eb1fa86c43c705f9f78c1e40c49aba1 (diff)
downloadlinux-stericsson-4bafcbc77fb0b26b0052dbd577ccc888a63e6404.tar.gz
OMAPDSS: HDMI5: Change DDC timings
The DDC scl high and low times were set to the minimum values from the i2c specification, but the i2c specification takes into account the rise time and fall time to calculate the frequency. To pass HDMI certification DDC can not exceed 100kHz therefore in a system where the rise times and fall times are negligible the high and low times for scl need to be 10us. Signed-off-by: Jim Lodes <jim.lodes@garmin.com> Signed-off-by: J.D. Schroeder <jay.schroeder@garmin.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video/fbdev/omap2/omapfb/dss')
-rw-r--r--drivers/video/fbdev/omap2/omapfb/dss/hdmi5_core.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/hdmi5_core.c b/drivers/video/fbdev/omap2/omapfb/dss/hdmi5_core.c
index fc5eceeddf9c..bbfe7e2d4332 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/hdmi5_core.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/hdmi5_core.c
@@ -51,8 +51,8 @@ static void hdmi_core_ddc_init(struct hdmi_core_data *core)
{
void __iomem *base = core->base;
const unsigned long long iclk = 266000000; /* DSS L3 ICLK */
- const unsigned ss_scl_high = 4000; /* ns */
- const unsigned ss_scl_low = 4700; /* ns */
+ const unsigned ss_scl_high = 4600; /* ns */
+ const unsigned ss_scl_low = 5400; /* ns */
const unsigned fs_scl_high = 600; /* ns */
const unsigned fs_scl_low = 1300; /* ns */
const unsigned sda_hold = 1000; /* ns */