[PATCH 2/8] OMAPDSS: HDMI: Add delay to wait for 5V power
From: Tomi Valkeinen <hidden>
Date: 2012-08-23 13:45:08
Also in:
linux-omap
Subsystem:
framebuffer layer, the rest · Maintainers:
Helge Deller, Linus Torvalds
TPD12S015A spec says to wait 300us after setting CT_CP_HPD gpio for the 5V power output to reach 90% of the voltage. This patch adds the delay to the driver. Signed-off-by: Tomi Valkeinen <redacted> --- drivers/video/omap2/dss/hdmi.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index 4fbe271..96a6e29 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c@@ -492,6 +492,9 @@ static int hdmi_power_on(struct omap_dss_device *dssdev) gpio_set_value(hdmi.ct_cp_hpd_gpio, 1); gpio_set_value(hdmi.ls_oe_gpio, 1); + /* wait 300us after CT_CP_HPD for the 5V power output to reach 90% */ + udelay(300); + r = hdmi_runtime_get(); if (r) goto err_runtime_get;
--
1.7.9.5