Previous to CCF, hdmiphy is added as a dummy clock in clock file for
exynos SoCs. Enable/Disable to this clock, actually toggles the power
control bit in PMU, instead of controlling the clock gate.
Patch adds the support to parse hdmiphy control node which is a child
node to hdmi, and map the pmu register to toggle the power control bit.
Signed-off-by: Rahul Sharma <rahul.sharma@xxxxxxxxxxx>
---
drivers/gpu/drm/exynos/exynos_hdmi.c | 69 ++++++++++++++++++++++++++++++----
drivers/gpu/drm/exynos/regs-hdmi.h | 4 ++
2 files changed, 65 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 3b5e215..75a6bf3 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -34,6 +34,7 @@
#include <linux/regulator/consumer.h>
#include <linux/io.h>
#include <linux/of_gpio.h>
+#include <linux/of_address.h>
#include <drm/exynos_drm.h>
@@ -82,7 +83,6 @@ struct hdmi_resources {
struct clk *sclk_hdmi;
struct clk *sclk_pixel;
struct clk *sclk_hdmiphy;
- struct clk *hdmiphy;
struct clk *mout_hdmi;
struct regulator_bulk_data *regul_bulk;
int regul_count;
@@ -189,6 +189,7 @@ struct hdmi_context {
struct mutex hdmi_mutex;
void __iomem *regs;
+ void __iomem *phy_pow_ctrl_reg;
void *parent_ctx;
int irq;
@@ -404,6 +405,14 @@ static inline void hdmi_reg_writemask(struct hdmi_context *hdata,
writel(value, hdata->regs + reg_id);
}
+static inline void hdmi_phy_pow_ctrl_reg_writemask(struct hdmi_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 void hdmi_v13_regs_dump(struct hdmi_context *hdata, char *prefix)
{
#define DUMPREG(reg_id) \
@@ -1702,7 +1711,8 @@ static void hdmi_poweron(struct hdmi_context *hdata)
if (regulator_bulk_enable(res->regul_count, res->regul_bulk))
DRM_DEBUG_KMS("failed to enable regulator bulk\n");
- clk_prepare_enable(res->hdmiphy);
+ hdmi_phy_pow_ctrl_reg_writemask(hdata, PMU_HDMI_PHY_ENABLE,
+ PMU_HDMI_PHY_CONTROL_MASK);
clk_prepare_enable(res->hdmi);
clk_prepare_enable(res->sclk_hdmi);
@@ -1729,7 +1739,8 @@ static void hdmi_poweroff(struct hdmi_context *hdata)
clk_disable_unprepare(res->sclk_hdmi);
clk_disable_unprepare(res->hdmi);
- clk_disable_unprepare(res->hdmiphy);
+ hdmi_phy_pow_ctrl_reg_writemask(hdata, PMU_HDMI_PHY_DISABLE,
+ PMU_HDMI_PHY_CONTROL_MASK);
regulator_bulk_disable(res->regul_count, res->regul_bulk);
mutex_lock(&hdata->hdmi_mutex);
@@ -1828,11 +1839,6 @@ static int hdmi_resources_init(struct hdmi_context *hdata)
DRM_ERROR("failed to get clock 'sclk_hdmiphy'\n");
goto fail;
}
- res->hdmiphy = devm_clk_get(dev, "hdmiphy");
- if (IS_ERR(res->hdmiphy)) {
- DRM_ERROR("failed to get clock 'hdmiphy'\n");
- goto fail;
- }
res->mout_hdmi = devm_clk_get(dev, "mout_hdmi");
if (IS_ERR(res->mout_hdmi)) {
DRM_ERROR("failed to get clock 'mout_hdmi'\n");
@@ -1905,12 +1911,52 @@ static struct s5p_hdmi_platform_data *drm_hdmi_dt_parse_pdata
err_data:
return NULL;
}
+
+static int drm_hdmi_dt_parse_phy_pow_control(struct hdmi_context *hdata)
+{
+ struct device_node *phy_pow_ctrl_node;
+ u32 buf[2];
+ int ret = 0;
+
+ phy_pow_ctrl_node = of_find_node_by_name(NULL, "phy-power-control");
+ if (!phy_pow_ctrl_node) {
+ DRM_ERROR("Failed to find phy power control node\n");
+ ret = -ENODEV;
+ goto fail;
+ }
+
+ /* reg property holds two informations: addr of pmu register, size */
+ if (of_property_read_u32_array(phy_pow_ctrl_node, "reg",
+ (u32 *)&buf, 2)) {
+ DRM_ERROR("faild to get phy power control reg\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ hdata->phy_pow_ctrl_reg = devm_ioremap(hdata->dev, buf[0], buf[1]);
+ if (!hdata->phy_pow_ctrl_reg) {
+ DRM_ERROR("failed to ioremap phy pmu reg\n");
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+fail:
+ of_node_put(phy_pow_ctrl_node);
+ return ret;
+}
+
#else
static struct s5p_hdmi_platform_data *drm_hdmi_dt_parse_pdata
(struct device *dev)
{
return NULL;
}
+
+static int drm_hdmi_dt_parse_phy_pow_control(struct hdmi_context *hdata)
+{
+ return 0;
+}
+
#endif
static struct platform_device_id hdmi_driver_types[] = {
@@ -2022,6 +2068,13 @@ static int hdmi_probe(struct platform_device *pdev)
return ret;
}
+ /* map hdmiphy power control reg */
+ ret = drm_hdmi_dt_parse_phy_pow_control(hdata);
+ if (ret) {
+ DRM_ERROR("failed to map phy power control registers\n");
+ return ret;
+ }
+
/* DDC i2c driver */
if (i2c_add_driver(&ddc_driver)) {
DRM_ERROR("failed to register ddc i2c driver\n");
diff --git a/drivers/gpu/drm/exynos/regs-hdmi.h b/drivers/gpu/drm/exynos/regs-hdmi.h
index ef1b3eb..8d9ca25 100644
--- a/drivers/gpu/drm/exynos/regs-hdmi.h
+++ b/drivers/gpu/drm/exynos/regs-hdmi.h
@@ -578,4 +578,8 @@
#define HDMI_TG_VACT_ST4_H HDMI_TG_BASE(0x0074)
#define HDMI_TG_3D HDMI_TG_BASE(0x00F0)
+#define PMU_HDMI_PHY_CONTROL_MASK (1 << 0)
+#define PMU_HDMI_PHY_ENABLE (1)
+#define PMU_HDMI_PHY_DISABLE (0)
+
#endif /* SAMSUNG_REGS_HDMI_H */
--
1.7.10.4
--
To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
