[RFC PATCH 3/5] video: exynos_dsi: Use generic PHY driver

[Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>]

Use the generic PHY API instead of the platform callback to control
the MIPI DSIM DPHY.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
 drivers/video/display/source-exynos_dsi.c |   36 +++++++++--------------------
 include/video/exynos_dsi.h                |    5 ----
 2 files changed, 11 insertions(+), 30 deletions(-)

diff --git a/drivers/video/display/source-exynos_dsi.c b/drivers/video/display/source-exynos_dsi.c
index 145d57b..dfab790 100644
--- a/drivers/video/display/source-exynos_dsi.c
+++ b/drivers/video/display/source-exynos_dsi.c
@@ -24,6 +24,7 @@
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/phy/phy.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/regulator/consumer.h>
@@ -219,6 +220,7 @@ struct exynos_dsi {
 	bool enabled;
 
 	struct platform_device *pdev;
+	struct phy *phy;
 	struct device *dev;
 	struct resource *res;
 	struct clk *pll_clk;
@@ -816,6 +818,7 @@ again:
 
 static bool exynos_dsi_transfer_finish(struct exynos_dsi *dsi)
 {
+	static unsigned long j;
 	struct exynos_dsi_transfer *xfer;
 	unsigned long flags;
 	bool start = true;
@@ -824,7 +827,8 @@ static bool exynos_dsi_transfer_finish(struct exynos_dsi *dsi)
 
 	if (list_empty(&dsi->transfer_list)) {
 		spin_unlock_irqrestore(&dsi->transfer_lock, flags);
-		dev_warn(dsi->dev, "unexpected TX/RX interrupt\n");
+		if (printk_timed_ratelimit(&j, 500))
+			dev_warn(dsi->dev, "unexpected TX/RX interrupt\n");
 		return false;
 	}
 
@@ -994,8 +998,7 @@ static int exynos_dsi_enable(struct video_source *src)
 	clk_prepare_enable(dsi->bus_clk);
 	clk_prepare_enable(dsi->pll_clk);
 
-	if (dsi->pd->phy_enable)
-		dsi->pd->phy_enable(dsi->pdev, true);
+	phy_power_on(dsi->phy);
 
 	exynos_dsi_reset(dsi);
 	exynos_dsi_init_link(dsi);
@@ -1019,8 +1022,7 @@ static int exynos_dsi_disable(struct video_source *src)
 
 	exynos_dsi_disable_clock(dsi);
 
-	if (dsi->pd->phy_enable)
-		dsi->pd->phy_enable(dsi->pdev, false);
+	phy_power_off(dsi->phy);
 
 	clk_disable_unprepare(dsi->pll_clk);
 	clk_disable_unprepare(dsi->bus_clk);
@@ -1099,12 +1101,6 @@ static const struct dsi_video_source_ops exynos_dsi_ops = {
  * Device Tree
  */
 
-static int (* const of_phy_enables[])(struct platform_device *, bool) = {
-#ifdef CONFIG_S5P_SETUP_MIPIPHY
-	[0] = s5p_dsim_phy_enable,
-#endif
-};
-
 static struct exynos_dsi_platform_data *exynos_dsi_parse_dt(
 						struct platform_device *pdev)
 {
@@ -1112,7 +1108,6 @@ static struct exynos_dsi_platform_data *exynos_dsi_parse_dt(
 	struct exynos_dsi_platform_data *dsi_pd;
 	struct device *dev = &pdev->dev;
 	const __be32 *prop_data;
-	u32 val;
 
 	dsi_pd = kzalloc(sizeof(*dsi_pd), GFP_KERNEL);
 	if (!dsi_pd) {
@@ -1120,19 +1115,6 @@ static struct exynos_dsi_platform_data *exynos_dsi_parse_dt(
 		return NULL;
 	}
 
-	prop_data = of_get_property(node, "samsung,phy-type", NULL);
-	if (!prop_data) {
-		dev_err(dev, "failed to get phy-type property\n");
-		goto err_free_pd;
-	}
-
-	val = be32_to_cpu(*prop_data);
-	if (val >= ARRAY_SIZE(of_phy_enables) || !of_phy_enables[val]) {
-		dev_err(dev, "Invalid phy-type %u\n", val);
-		goto err_free_pd;
-	}
-	dsi_pd->phy_enable = of_phy_enables[val];
-
 	prop_data = of_get_property(node, "samsung,pll-stable-time", NULL);
 	if (!prop_data) {
 		dev_err(dev, "failed to get pll-stable-time property\n");
@@ -1254,6 +1236,10 @@ static int exynos_dsi_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
+	dsi->phy = devm_phy_get(&pdev->dev, "dsim");
+	if (IS_ERR(dsi->phy))
+		return PTR_ERR(dsi->phy);
+
 	platform_set_drvdata(pdev, dsi);
 
 	dsi->irq = platform_get_irq(pdev, 0);
diff --git a/include/video/exynos_dsi.h b/include/video/exynos_dsi.h
index 95e1568..5c062c7 100644
--- a/include/video/exynos_dsi.h
+++ b/include/video/exynos_dsi.h
@@ -25,9 +25,6 @@
  */
 struct exynos_dsi_platform_data {
 	unsigned int enabled;
-
-	int (*phy_enable)(struct platform_device *pdev, bool on);
-
 	unsigned int pll_stable_time;
 	unsigned long pll_clk_rate;
 	unsigned long esc_clk_rate;
@@ -36,6 +33,4 @@ struct exynos_dsi_platform_data {
 	unsigned short rx_timeout;
 };
 
-int s5p_dsim_phy_enable(struct platform_device *pdev, bool on);
-
 #endif /* _EXYNOS_MIPI_DSIM_H */
-- 
1.7.9.5

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