drm/exynos: add support for hdmiphy power control for exynos5

This patch adds support for controlling power of hdmi phy for
exynos5 soc. A special bit is provided in exynos5 for directly
switching of PHY while in exynos4, phy power needs to be controlled
through i2c settings. I2C configuration may affect the suspend to
resume and wake-up time requirements hence not added.

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 98c587321521bf743dac9340e40f5ef039f75497..68936e6aa6ab0c286d8d05b91e672610ad121921 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -2003,6 +2003,24 @@ static void hdmiphy_conf_reset(struct hdmi_context *hdata)
        mdelay(10);
 }
 
+static void hdmiphy_poweron(struct hdmi_context *hdata)
+{
+       DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+
+       if (hdata->type == HDMI_TYPE14)
+               hdmi_reg_writemask(hdata, HDMI_PHY_CON_0, 0,
+                       HDMI_PHY_POWER_OFF_EN);
+}
+
+static void hdmiphy_poweroff(struct hdmi_context *hdata)
+{
+       DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+
+       if (hdata->type == HDMI_TYPE14)
+               hdmi_reg_writemask(hdata, HDMI_PHY_CON_0, ~0,
+                       HDMI_PHY_POWER_OFF_EN);
+}
+
 static void hdmiphy_conf_apply(struct hdmi_context *hdata)
 {
        const u8 *hdmiphy_data;
@@ -2175,6 +2193,8 @@ static void hdmi_poweron(struct hdmi_context *hdata)
        clk_enable(res->hdmiphy);
        clk_enable(res->hdmi);
        clk_enable(res->sclk_hdmi);
+
+       hdmiphy_poweron(hdata);
 }
 
 static void hdmi_poweroff(struct hdmi_context *hdata)
@@ -2193,6 +2213,7 @@ static void hdmi_poweroff(struct hdmi_context *hdata)
         * its reset state seems to meet the condition.
         */
        hdmiphy_conf_reset(hdata);
+       hdmiphy_poweroff(hdata);
 
        clk_disable(res->sclk_hdmi);
        clk_disable(res->hdmi);

diff --git a/drivers/gpu/drm/exynos/regs-hdmi.h b/drivers/gpu/drm/exynos/regs-hdmi.h
index 970cdb518eb1b8d31c77cd4c07d085d820fef8ab..ef1b3eb3ba6e19f8417c88185342053e64c4508b 100644 (file)
--- a/drivers/gpu/drm/exynos/regs-hdmi.h
+++ b/drivers/gpu/drm/exynos/regs-hdmi.h
@@ -176,6 +176,11 @@
 #define HDMI_PHY_CMU                   HDMI_CTRL_BASE(0x007C)
 #define HDMI_CORE_RSTOUT               HDMI_CTRL_BASE(0x0080)
 
+/* PHY Control bit definition */
+
+/* HDMI_PHY_CON_0 */
+#define HDMI_PHY_POWER_OFF_EN          (1 << 0)
+
 /* Video related registers */
 #define HDMI_YMAX                      HDMI_CORE_BASE(0x0060)
 #define HDMI_YMIN                      HDMI_CORE_BASE(0x0064)