Before hdmiphy operation like config, start etc, hdmiphy
bit in PMU block should be enabled. Earlier this happens
in hdmi driver through a dummy "hdmiphy" clock.
Pmu bit control is added in both i2c and platform driver
for exynos hdmiphy.
Signed-off-by: Rahul Sharma <rahul.sharma@xxxxxxxxxxx>
---
.../devicetree/bindings/video/exynos_hdmiphy.txt | 8 ++-
drivers/gpu/drm/exynos/exynos_hdmiphy_i2c.c | 55 ++++++++++++++++++++
drivers/gpu/drm/exynos/exynos_hdmiphy_platform.c | 55 ++++++++++++++++++++
drivers/gpu/drm/exynos/exynos_hdmiphy_priv.h | 1 +
4 files changed, 118 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/video/exynos_hdmiphy.txt b/Documentation/devicetree/bindings/video/exynos_hdmiphy.txt
index 162f641..91e6578 100644
--- a/Documentation/devicetree/bindings/video/exynos_hdmiphy.txt
+++ b/Documentation/devicetree/bindings/video/exynos_hdmiphy.txt
@@ -5,11 +5,17 @@ Required properties:
1) "samsung,exynos5-hdmiphy" <DEPRECATED>
2) "samsung,exynos4210-hdmiphy".
3) "samsung,exynos4212-hdmiphy".
-- reg: I2C address of the hdmiphy device.
+- reg: Physical address of the hdmiphy device.
+- phy-power-control: this child node represents phy power control
+ register which is inside the pmu block (power management unit).
Example:
hdmiphy {
compatible = "samsung,exynos4210-hdmiphy";
reg = <0x38>;
+
+ phy-power-control {
+ reg = <0x10040700 0x04>;
+ };
};
diff --git a/drivers/gpu/drm/exynos/exynos_hdmiphy_i2c.c b/drivers/gpu/drm/exynos/exynos_hdmiphy_i2c.c
index 76b3a74..6b411bd 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmiphy_i2c.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmiphy_i2c.c
@@ -201,6 +201,47 @@ static struct hdmiphy_config *hdmiphy_find_conf(struct hdmiphy_context *hdata,
return NULL;
}
+static int hdmiphy_dt_parse_power_control(struct i2c_client *client)
+{
+ struct device_node *phy_pow_ctrl_node;
+ struct hdmiphy_context *hdata = i2c_get_clientdata(client);
+ u32 buf[2];
+ int ret = 0;
+
+ phy_pow_ctrl_node = of_get_child_by_name(client->dev.of_node,
+ "phy-power-control");
+ if (!phy_pow_ctrl_node) {
+ DRM_ERROR("Failed to find phy power control node\n");
+ return -ENODEV;
+ }
+
+ /* reg property holds two informations: addr of pmu register, size */
+ if (of_property_read_u32_array(phy_pow_ctrl_node, "reg", buf, 2)) {
+ DRM_ERROR("faild to get phy power control reg\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ hdata->phy_pow_ctrl_reg = devm_ioremap(&client->dev, buf[0], buf[1]);
+ if (!hdata->phy_pow_ctrl_reg) {
+ DRM_ERROR("failed to ioremap phy pmu reg\n");
+ ret = -ENOMEM;
+ }
+
+out:
+ of_node_put(phy_pow_ctrl_node);
+ return ret;
+}
+
+static inline void hdmiphy_pow_ctrl_reg_writemask(
+ struct hdmiphy_context *hdata,
+ u32 value, u32 mask)
+{
+ u32 old = readl(hdata->phy_pow_ctrl_reg);
+ value = (value & mask) | (old & ~mask);
+ writel(value, hdata->phy_pow_ctrl_reg);
+}
+
static int hdmiphy_reg_writeb(struct device *dev,
u32 reg_offset, u8 value)
{
@@ -313,9 +354,16 @@ static void hdmiphy_enable(struct device *dev, int enable)
static void hdmiphy_poweron(struct device *dev, int mode)
{
+ struct hdmiphy_context *hdata = dev_get_drvdata(dev);
DRM_DEBUG_KMS("[%d]\n", __LINE__);
+ if (mode)
+ hdmiphy_pow_ctrl_reg_writemask(hdata, PMU_HDMI_PHY_ENABLE,
+ PMU_HDMI_PHY_CONTROL_MASK);
+ else
+ hdmiphy_pow_ctrl_reg_writemask(hdata, PMU_HDMI_PHY_DISABLE,
+ PMU_HDMI_PHY_CONTROL_MASK);
}
struct exynos_hdmiphy_ops *exynos_hdmiphy_i2c_device_get_ops
@@ -370,6 +418,7 @@ static int hdmiphy_i2c_device_probe(struct i2c_client *client,
struct hdmiphy_context *hdata;
struct hdmiphy_drv_data *drv;
const struct of_device_id *match;
+ int ret;
DRM_DEBUG_KMS("[%d]\n", __LINE__);
@@ -393,6 +442,12 @@ static int hdmiphy_i2c_device_probe(struct i2c_client *client,
hdata->ops = &phy_ops;
i2c_set_clientdata(client, hdata);
+ ret = hdmiphy_dt_parse_power_control(client);
+ if (ret) {
+ DRM_ERROR("failed to map hdmiphy pow control reg.\n");
+ return ret;
+ }
+
return 0;
}
diff --git a/drivers/gpu/drm/exynos/exynos_hdmiphy_platform.c b/drivers/gpu/drm/exynos/exynos_hdmiphy_platform.c
index 053d854..8fe1786 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmiphy_platform.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmiphy_platform.c
@@ -160,6 +160,47 @@ static struct hdmiphy_config *hdmiphy_find_conf(struct hdmiphy_context *hdata,
return NULL;
}
+static int hdmiphy_dt_parse_power_control(struct platform_device *pdev)
+{
+ struct device_node *phy_pow_ctrl_node;
+ struct hdmiphy_context *hdata = platform_get_drvdata(pdev);
+ u32 buf[2];
+ int ret = 0;
+
+ phy_pow_ctrl_node = of_get_child_by_name(pdev->dev.of_node,
+ "phy-power-control");
+ if (!phy_pow_ctrl_node) {
+ DRM_ERROR("Failed to find phy power control node\n");
+ return -ENODEV;
+ }
+
+ /* reg property holds two informations: addr of pmu register, size */
+ if (of_property_read_u32_array(phy_pow_ctrl_node, "reg", buf, 2)) {
+ DRM_ERROR("faild to get phy power control reg\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ hdata->phy_pow_ctrl_reg = devm_ioremap(&pdev->dev, buf[0], buf[1]);
+ if (!hdata->phy_pow_ctrl_reg) {
+ DRM_ERROR("failed to ioremap phy pmu reg\n");
+ ret = -ENOMEM;
+ }
+
+out:
+ of_node_put(phy_pow_ctrl_node);
+ return ret;
+}
+
+static void hdmiphy_pow_ctrl_reg_writemask(
+ struct hdmiphy_context *hdata,
+ u32 value, u32 mask)
+{
+ u32 old = readl(hdata->phy_pow_ctrl_reg);
+ value = (value & mask) | (old & ~mask);
+ writel(value, hdata->phy_pow_ctrl_reg);
+}
+
static int hdmiphy_reg_writeb(struct hdmiphy_context *hdata,
u32 reg_offset, u8 value)
{
@@ -252,9 +293,16 @@ static void hdmiphy_enable(struct device *dev, int enable)
static void hdmiphy_poweron(struct device *dev, int mode)
{
+ struct hdmiphy_context *hdata = dev_get_drvdata(dev);
DRM_DEBUG_KMS("[%d]\n", __LINE__);
+ if (mode)
+ hdmiphy_pow_ctrl_reg_writemask(hdata, PMU_HDMI_PHY_ENABLE,
+ PMU_HDMI_PHY_CONTROL_MASK);
+ else
+ hdmiphy_pow_ctrl_reg_writemask(hdata, PMU_HDMI_PHY_DISABLE,
+ PMU_HDMI_PHY_CONTROL_MASK);
}
struct exynos_hdmiphy_ops *exynos_hdmiphy_platform_device_get_ops
@@ -298,6 +346,7 @@ static int hdmiphy_platform_device_probe(struct platform_device *pdev)
struct hdmiphy_drv_data *drv;
struct resource *res;
const struct of_device_id *match;
+ int ret;
DRM_DEBUG_KMS("[%d]\n", __LINE__);
@@ -333,6 +382,12 @@ static int hdmiphy_platform_device_probe(struct platform_device *pdev)
hdata->ops = &phy_ops;
platform_set_drvdata(pdev, hdata);
+ ret = hdmiphy_dt_parse_power_control(pdev);
+ if (ret) {
+ DRM_ERROR("failed to map hdmiphy pow control reg.\n");
+ return ret;
+ }
+
return 0;
}
diff --git a/drivers/gpu/drm/exynos/exynos_hdmiphy_priv.h b/drivers/gpu/drm/exynos/exynos_hdmiphy_priv.h
index 9ba46d4..5987baf 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmiphy_priv.h
+++ b/drivers/gpu/drm/exynos/exynos_hdmiphy_priv.h
@@ -15,6 +15,7 @@
struct hdmiphy_context {
/* hdmiphy resources */
+ void __iomem *phy_pow_ctrl_reg;
void __iomem *regs;
struct exynos_hdmiphy_ops *ops;
struct hdmiphy_config *confs;
--
1.7.10.4
--
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