drm/exynos: add hdmiphy power on/off sequence
This patch implements the power on/off sequence
of HDMI PHY in exynos5420 and exynos5250 as provided
by the hardware team.
This has been verified for mulitple iterations of
S2R.
Signed-off-by: Shirish S <s.shirish@samsung.com>
Signed-off-by: Rahul Sharma <Rahul.Sharma@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index e05c86a..d0f4f5d 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -1683,16 +1683,44 @@
static void hdmiphy_poweron(struct hdmi_context *hdata)
{
- if (hdata->type == HDMI_TYPE14)
- hdmi_reg_writemask(hdata, HDMI_PHY_CON_0, 0,
- HDMI_PHY_POWER_OFF_EN);
+ if (hdata->type != HDMI_TYPE14)
+ return;
+
+ DRM_DEBUG_KMS("\n");
+
+ /* For PHY Mode Setting */
+ hdmiphy_reg_writeb(hdata, HDMIPHY_MODE_SET_DONE,
+ HDMI_PHY_ENABLE_MODE_SET);
+ /* Phy Power On */
+ hdmiphy_reg_writeb(hdata, HDMIPHY_POWER,
+ HDMI_PHY_POWER_ON);
+ /* For PHY Mode Setting */
+ hdmiphy_reg_writeb(hdata, HDMIPHY_MODE_SET_DONE,
+ HDMI_PHY_DISABLE_MODE_SET);
+ /* PHY SW Reset */
+ hdmiphy_conf_reset(hdata);
}
static void hdmiphy_poweroff(struct hdmi_context *hdata)
{
- if (hdata->type == HDMI_TYPE14)
- hdmi_reg_writemask(hdata, HDMI_PHY_CON_0, ~0,
- HDMI_PHY_POWER_OFF_EN);
+ if (hdata->type != HDMI_TYPE14)
+ return;
+
+ DRM_DEBUG_KMS("\n");
+
+ /* PHY SW Reset */
+ hdmiphy_conf_reset(hdata);
+ /* For PHY Mode Setting */
+ hdmiphy_reg_writeb(hdata, HDMIPHY_MODE_SET_DONE,
+ HDMI_PHY_ENABLE_MODE_SET);
+
+ /* PHY Power Off */
+ hdmiphy_reg_writeb(hdata, HDMIPHY_POWER,
+ HDMI_PHY_POWER_OFF);
+
+ /* For PHY Mode Setting */
+ hdmiphy_reg_writeb(hdata, HDMIPHY_MODE_SET_DONE,
+ HDMI_PHY_DISABLE_MODE_SET);
}
static void hdmiphy_conf_apply(struct hdmi_context *hdata)