drm/exynos/hdmi: simplify HDMI-PHY power sequence

Currently driver tries to set specific HDMI-PHY registers in three situations:
- before reset,
- before power off,
- after applying HDMI-PHY configuration.

First two cases seems to be unnecessary - register contents will be lost
anyway. The third case can be merged with HDMI-PHY configuration by fixing
the last byte of configuration data.

The patch has been tested with following platforms:
- exynos4210-universal_c210,
- exynos4412-odroidu3,
- exynos5422-odroidxu3.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
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 414ea2d..814dd8c 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -148,7 +148,7 @@ static const struct hdmiphy_config hdmiphy_v13_configs[] = {
                        0x01, 0x05, 0x00, 0xD8, 0x10, 0x1C, 0x30, 0x40,
                        0x6B, 0x10, 0x02, 0x51, 0xDF, 0xF2, 0x54, 0x87,
                        0x84, 0x00, 0x30, 0x38, 0x00, 0x08, 0x10, 0xE0,
-                       0x22, 0x40, 0xE3, 0x26, 0x00, 0x00, 0x00, 0x00,
+                       0x22, 0x40, 0xE3, 0x26, 0x00, 0x00, 0x00, 0x80,
                },
        },
        {
@@ -157,7 +157,7 @@ static const struct hdmiphy_config hdmiphy_v13_configs[] = {
                        0x01, 0x05, 0x00, 0xD4, 0x10, 0x9C, 0x09, 0x64,
                        0x6B, 0x10, 0x02, 0x51, 0xDF, 0xF2, 0x54, 0x87,
                        0x84, 0x00, 0x30, 0x38, 0x00, 0x08, 0x10, 0xE0,
-                       0x22, 0x40, 0xE3, 0x26, 0x00, 0x00, 0x00, 0x00,
+                       0x22, 0x40, 0xE3, 0x26, 0x00, 0x00, 0x00, 0x80,
                },
        },
        {
@@ -166,7 +166,7 @@ static const struct hdmiphy_config hdmiphy_v13_configs[] = {
                        0x01, 0x05, 0x00, 0xD8, 0x10, 0x9C, 0xef, 0x5B,
                        0x6D, 0x10, 0x01, 0x51, 0xef, 0xF3, 0x54, 0xb9,
                        0x84, 0x00, 0x30, 0x38, 0x00, 0x08, 0x10, 0xE0,
-                       0x22, 0x40, 0xa5, 0x26, 0x01, 0x00, 0x00, 0x00,
+                       0x22, 0x40, 0xa5, 0x26, 0x01, 0x00, 0x00, 0x80,
                },
        },
        {
@@ -175,7 +175,7 @@ static const struct hdmiphy_config hdmiphy_v13_configs[] = {
                        0x01, 0x05, 0x00, 0xd8, 0x10, 0x9c, 0xf8, 0x40,
                        0x6a, 0x10, 0x01, 0x51, 0xff, 0xf1, 0x54, 0xba,
                        0x84, 0x00, 0x10, 0x38, 0x00, 0x08, 0x10, 0xe0,
-                       0x22, 0x40, 0xa4, 0x26, 0x01, 0x00, 0x00, 0x00,
+                       0x22, 0x40, 0xa4, 0x26, 0x01, 0x00, 0x00, 0x80,
                },
        },
        {
@@ -184,7 +184,7 @@ static const struct hdmiphy_config hdmiphy_v13_configs[] = {
                        0x01, 0x05, 0x00, 0xD8, 0x10, 0x9C, 0xf8, 0x40,
                        0x6A, 0x18, 0x00, 0x51, 0xff, 0xF1, 0x54, 0xba,
                        0x84, 0x00, 0x10, 0x38, 0x00, 0x08, 0x10, 0xE0,
-                       0x22, 0x40, 0xa4, 0x26, 0x02, 0x00, 0x00, 0x00,
+                       0x22, 0x40, 0xa4, 0x26, 0x02, 0x00, 0x00, 0x80,
                },
        },
 };
@@ -214,7 +214,7 @@ static const struct hdmiphy_config hdmiphy_v14_configs[] = {
                        0x01, 0xd1, 0x2d, 0x72, 0x40, 0x64, 0x12, 0x08,
                        0x43, 0xa0, 0x0e, 0xd9, 0x45, 0xa0, 0xac, 0x80,
                        0x08, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
-                       0x54, 0xe3, 0x24, 0x00, 0x00, 0x00, 0x01, 0x00,
+                       0x54, 0xe3, 0x24, 0x00, 0x00, 0x00, 0x01, 0x80,
                },
        },
        {
@@ -277,7 +277,7 @@ static const struct hdmiphy_config hdmiphy_v14_configs[] = {
                        0x01, 0xd1, 0x1f, 0x10, 0x40, 0x40, 0xf8, 0x08,
                        0x81, 0xa0, 0xba, 0xd8, 0x45, 0xa0, 0xac, 0x80,
                        0x3c, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
-                       0x54, 0xa5, 0x24, 0x01, 0x00, 0x00, 0x01, 0x00,
+                       0x54, 0xa5, 0x24, 0x01, 0x00, 0x00, 0x01, 0x80,
                },
        },
        {
@@ -340,7 +340,7 @@ static const struct hdmiphy_config hdmiphy_v14_configs[] = {
                        0x01, 0xd1, 0x1f, 0x00, 0x40, 0x40, 0xf8, 0x08,
                        0x81, 0xa0, 0xba, 0xd8, 0x45, 0xa0, 0xac, 0x80,
                        0x3c, 0x80, 0x11, 0x04, 0x02, 0x22, 0x44, 0x86,
-                       0x54, 0x4b, 0x25, 0x03, 0x00, 0x00, 0x01, 0x00,
+                       0x54, 0x4b, 0x25, 0x03, 0x00, 0x00, 0x01, 0x80,
                },
        },
 };
@@ -563,26 +563,6 @@ static inline void hdmi_reg_writemask(struct hdmi_context *hdata,
        writel(value, hdata->regs + reg_id);
 }
 
-static int hdmiphy_reg_writeb(struct hdmi_context *hdata,
-                       u32 reg_offset, u8 value)
-{
-       if (hdata->hdmiphy_port) {
-               u8 buffer[2];
-               int ret;
-
-               buffer[0] = reg_offset;
-               buffer[1] = value;
-
-               ret = i2c_master_send(hdata->hdmiphy_port, buffer, 2);
-               if (ret == 2)
-                       return 0;
-               return ret;
-       } else {
-               writeb(value, hdata->regs_hdmiphy + (reg_offset<<2));
-               return 0;
-       }
-}
-
 static int hdmiphy_reg_write_buf(struct hdmi_context *hdata,
                        u32 reg_offset, const u8 *buf, u32 len)
 {
@@ -1598,10 +1578,6 @@ static void hdmiphy_conf_reset(struct hdmi_context *hdata)
        clk_set_parent(hdata->res.mout_hdmi, hdata->res.sclk_pixel);
        clk_prepare_enable(hdata->res.sclk_hdmi);
 
-       /* operation mode */
-       hdmiphy_reg_writeb(hdata, HDMIPHY_MODE_SET_DONE,
-                               HDMI_PHY_ENABLE_MODE_SET);
-
        /* reset hdmiphy */
        hdmi_reg_writemask(hdata, HDMI_PHY_RSTOUT, ~0, HDMI_PHY_SW_RSTOUT);
        usleep_range(10000, 12000);
@@ -1609,48 +1585,6 @@ static void hdmiphy_conf_reset(struct hdmi_context *hdata)
        usleep_range(10000, 12000);
 }
 
-static void hdmiphy_poweron(struct hdmi_context *hdata)
-{
-       if (hdata->drv_data->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->drv_data->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)
 {
        int ret;
@@ -1671,14 +1605,6 @@ static void hdmiphy_conf_apply(struct hdmi_context *hdata)
        }
 
        usleep_range(10000, 12000);
-
-       ret = hdmiphy_reg_writeb(hdata, HDMIPHY_MODE_SET_DONE,
-                               HDMI_PHY_DISABLE_MODE_SET);
-       if (ret) {
-               DRM_ERROR("failed to enable hdmiphy\n");
-               return;
-       }
-
 }
 
 static void hdmi_conf_apply(struct hdmi_context *hdata)
@@ -1736,7 +1662,6 @@ static void hdmi_enable(struct drm_encoder *encoder)
        clk_prepare_enable(res->hdmi);
        clk_prepare_enable(res->sclk_hdmi);
 
-       hdmiphy_poweron(hdata);
        hdmi_conf_apply(hdata);
 }
 
@@ -1767,8 +1692,6 @@ static void hdmi_disable(struct drm_encoder *encoder)
        /* HDMI System Disable */
        hdmi_reg_writemask(hdata, HDMI_CON_0, 0, HDMI_EN);
 
-       hdmiphy_poweroff(hdata);
-
        cancel_delayed_work(&hdata->hotplug_work);
 
        clk_disable_unprepare(res->sclk_hdmi);