From: Shirish S <s.shir...@samsung.com>
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 at samsung.com>
Signed-off-by: Rahul Sharma <Rahul.Sharma at samsung.com>
---
drivers/gpu/drm/exynos/exynos_hdmi.c | 40 +++++++++++++++++++++++++++++-----
drivers/gpu/drm/exynos/regs-hdmi.h | 7 +++++-
2 files changed, 40 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c
b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 539e603..b2cbf43 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -1711,16 +1711,44 @@ static void hdmiphy_conf_reset(struct hdmi_context
*hdata)
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)
diff --git a/drivers/gpu/drm/exynos/regs-hdmi.h
b/drivers/gpu/drm/exynos/regs-hdmi.h
index 344a5db..fd4c590 100644
--- a/drivers/gpu/drm/exynos/regs-hdmi.h
+++ b/drivers/gpu/drm/exynos/regs-hdmi.h
@@ -579,7 +579,12 @@
#define HDMI_TG_3D HDMI_TG_BASE(0x00F0)
/* HDMI PHY Registers Offsets*/
-#define HDMIPHY_MODE_SET_DONE (0x7C >> 2)
+#define HDMIPHY_POWER (0x74 >> 2)
+#define HDMIPHY_MODE_SET_DONE (0x7c >> 2)
+
+/* HDMI PHY Values */
+#define HDMI_PHY_POWER_ON 0x80
+#define HDMI_PHY_POWER_OFF 0xff
/* HDMI PHY Values */
#define HDMI_PHY_DISABLE_MODE_SET 0x80
--
1.7.9.5
