[PATCH 1/2] drm/exynos: hdmi: Add support for Exynos7 HDMI

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Modify the exynos HDMI driver to support Exynos7 HDMI 1.4.
* Add phy configs for Exynos7.
* Exynos7 has a different clock structure for HDMI,
  so introduce the new clocks.
* Add sysreg support to enable HDMI SYSREG on Exynos7.
* Exynos7 based boards need a DCDC_EN and LS_EN pins
  for powering up HDMI. Add support for that too.

Signed-off-by: Ajay Kumar <ajaykumar.rs@xxxxxxxxxxx>
---
 .../devicetree/bindings/video/exynos_hdmi.txt      |   21 +-
 drivers/gpu/drm/exynos/exynos_hdmi.c               |  252 ++++++++++++++++----
 drivers/gpu/drm/exynos/regs-hdmi.h                 |    4 +
 3 files changed, 231 insertions(+), 46 deletions(-)

diff --git a/Documentation/devicetree/bindings/video/exynos_hdmi.txt b/Documentation/devicetree/bindings/video/exynos_hdmi.txt
index 1fd8cf9..bb22a60 100644
--- a/Documentation/devicetree/bindings/video/exynos_hdmi.txt
+++ b/Documentation/devicetree/bindings/video/exynos_hdmi.txt
@@ -6,6 +6,7 @@ Required properties:
 	2) "samsung,exynos4210-hdmi"
 	3) "samsung,exynos4212-hdmi"
 	4) "samsung,exynos5420-hdmi"
+	5) "samsung,exynos7-hdmi"
 - reg: physical base address of the hdmi and length of memory mapped
 	region.
 - interrupts: interrupt number to the cpu.
@@ -15,21 +16,33 @@ Required properties:
 	c) optional flags and pull up/down.
 - clocks: list of clock IDs from SoC clock driver.
 	a) hdmi: Gate of HDMI IP bus clock.
-	b) sclk_hdmi: Gate of HDMI special clock.
-	c) sclk_pixel: Pixel special clock, one of the two possible inputs of
+	HDMI clocks necessary for non exynos7:
+	 b) sclk_hdmi: Gate of HDMI special clock.
+	 c) sclk_pixel: Pixel special clock, one of the two possible inputs of
 		HDMI clock mux.
-	d) sclk_hdmiphy: HDMI PHY clock output, one of two possible inputs of
+	 d) sclk_hdmiphy: HDMI PHY clock output, one of two possible inputs of
 		HDMI clock mux.
-	e) mout_hdmi: It is required by the driver to switch between the 2
+	 e) mout_hdmi: It is required by the driver to switch between the 2
 		parents i.e. sclk_pixel and sclk_hdmiphy. If hdmiphy is stable
 		after configuration, parent is set to sclk_hdmiphy else
 		sclk_pixel.
+	HDMI clocks necessary for Exynos7:
+	 b) pclk_hdmiphy: Gate to HDMIPHY clock.
+	 c) hdmi_pixel: Gate clock of MUX output for I_PIXEL_CLK.
+	 d) hdmi_tmds: Gate clock of MUX output for I_TMDS_CLK.
 - clock-names: aliases as per driver requirements for above clock IDs:
 	"hdmi", "sclk_hdmi", "sclk_pixel", "sclk_hdmiphy" and "mout_hdmi".
 - ddc: phandle to the hdmi ddc node
 - phy: phandle to the hdmi phy node
 - samsung,syscon-phandle: phandle for system controller node for PMU.
 
+Only for Exynos7(when compatible = "samsung,exynos7-hdmi"):
+- samsung,sysreg-phandle: phandle for system controller node for SYSREG block.
+
+Optional properties:
+- dcdc-gpios: OF device-tree gpio specification for HDMI_DCDC_EN pin.
+- lsen-gpios: OF device-tree gpio specification for HDMI_LS_EN pin.
+
 Example:
 
 	hdmi {
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 229b361..1b579ea 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -67,6 +67,7 @@
 enum hdmi_type {
 	HDMI_TYPE13,
 	HDMI_TYPE14,
+	HDMI_TYPE14_7,
 };
 
 struct hdmi_driver_data {
@@ -82,6 +83,9 @@ struct hdmi_resources {
 	struct clk			*sclk_pixel;
 	struct clk			*sclk_hdmiphy;
 	struct clk			*mout_hdmi;
+	struct clk			*hdmi_pixel;
+	struct clk			*pclk_hdmiphy;
+	struct clk			*hdmi_tmds;
 	struct regulator_bulk_data	*regul_bulk;
 	struct regulator		*reg_hdmi_en;
 	int				regul_count;
@@ -210,6 +214,7 @@ struct hdmi_context {
 	unsigned int			phy_conf_count;
 
 	struct regmap			*pmureg;
+	struct regmap			*sysreg;
 	enum hdmi_type			type;
 };
 
@@ -584,6 +589,61 @@ static const struct hdmiphy_config hdmiphy_5420_configs[] = {
 	},
 };
 
+static const struct hdmiphy_config hdmiphy_7_configs[] = {
+	{
+		.pixel_clock = 27000000,
+		.conf = {
+			0x01, 0xD2, 0x87, 0xB0, 0x01, 0x00, 0x88, 0x02,
+			0x4F, 0x30, 0x33, 0x65, 0x00, 0xE4, 0x24, 0x80,
+			0x6C, 0xF2, 0x67, 0x00, 0x10, 0x0B, 0x00, 0x10,
+			0x60, 0x0F, 0x00, 0x00, 0x08, 0x00, 0x3E, 0x00,
+		},
+	},
+	{
+		.pixel_clock = 27027000,
+		.conf = {
+			0x01, 0xD1, 0x5A, 0xFA, 0xE4, 0x12, 0x88, 0x43,
+			0x4F, 0x30, 0x33, 0x65, 0x00, 0xE4, 0x24, 0x80,
+			0x6C, 0xF2, 0x67, 0x00, 0x10, 0x0F, 0x00, 0x10,
+			0x60, 0x0F, 0x00, 0x00, 0x08, 0x00, 0x3E, 0x00,
+		},
+	},
+	{
+		.pixel_clock = 74176000,
+		.conf = {
+			0x01, 0xD1, 0x3E, 0x35, 0xDB, 0xA2, 0x88, 0x42,
+			0x4F, 0x30, 0x33, 0x65, 0x10, 0xA6, 0x24, 0x80,
+			0x6C, 0xF2, 0x67, 0x00, 0x10, 0x03, 0x00, 0x10,
+			0x60, 0x0F, 0x00, 0x00, 0x08, 0x00, 0x3E, 0x00,
+		},
+	},
+	{
+		.pixel_clock = 74250000,
+		.conf = {
+			0x01, 0xD1, 0x3E, 0x35, 0xC0, 0x90, 0x88, 0x42,
+			0x4F, 0x30, 0x33, 0x65, 0x10, 0xA6, 0x24, 0x80,
+			0x6C, 0xF2, 0x67, 0x00, 0x10, 0x03, 0x00, 0x10,
+			0x60, 0x0F, 0x00, 0x00, 0x08, 0x00, 0x3E, 0x00,
+		},
+	},
+	{
+		.pixel_clock = 148500000,
+		.conf = {
+			0x01, 0xD1, 0x3E, 0x15, 0xC0, 0x90, 0x88, 0x42,
+			0x4F, 0x30, 0x33, 0x65, 0x20, 0xA6, 0x24, 0x80,
+			0x6C, 0xF2, 0x67, 0x00, 0x10, 0x01, 0x00, 0x10,
+			0x60, 0x0F, 0x00, 0x00, 0x08, 0x00, 0x3E, 0x00,
+		},
+	},
+};
+
+static struct hdmi_driver_data exynos7_hdmi_driver_data = {
+	.type		= HDMI_TYPE14_7,
+	.phy_confs	= hdmiphy_7_configs,
+	.phy_conf_count	= ARRAY_SIZE(hdmiphy_7_configs),
+	.is_apb_phy	= 1,
+};
+
 static struct hdmi_driver_data exynos5420_hdmi_driver_data = {
 	.type		= HDMI_TYPE14,
 	.phy_confs	= hdmiphy_5420_configs,
@@ -1355,6 +1415,9 @@ static void hdmi_start(struct hdmi_context *hdata, bool start)
 		val |= HDMI_FIELD_EN;
 
 	hdmi_reg_writemask(hdata, HDMI_CON_0, val, HDMI_EN);
+	if (hdata->type == HDMI_TYPE14_7)
+		hdmi_reg_writemask(hdata, HDMI_CON_0, HDMI_ENCODING_RETAIN,
+							HDMI_ENCODING_RETAIN);
 	hdmi_reg_writemask(hdata, HDMI_TG_CMD, val, HDMI_TG_EN | HDMI_FIELD_EN);
 }
 
@@ -1489,9 +1552,11 @@ static void hdmi_v13_mode_apply(struct hdmi_context *hdata)
 		hdmi_regs_dump(hdata, "timing apply");
 	}
 
-	clk_disable_unprepare(hdata->res.sclk_hdmi);
-	clk_set_parent(hdata->res.mout_hdmi, hdata->res.sclk_hdmiphy);
-	clk_prepare_enable(hdata->res.sclk_hdmi);
+	if (hdata->type != HDMI_TYPE14_7) {
+		clk_disable_unprepare(hdata->res.sclk_hdmi);
+		clk_set_parent(hdata->res.mout_hdmi, hdata->res.sclk_hdmiphy);
+		clk_prepare_enable(hdata->res.sclk_hdmi);
+	}
 
 	/* enable HDMI and timing generator */
 	hdmi_start(hdata, true);
@@ -1651,9 +1716,11 @@ static void hdmi_v14_mode_apply(struct hdmi_context *hdata)
 		hdmi_regs_dump(hdata, "timing apply");
 	}
 
-	clk_disable_unprepare(hdata->res.sclk_hdmi);
-	clk_set_parent(hdata->res.mout_hdmi, hdata->res.sclk_hdmiphy);
-	clk_prepare_enable(hdata->res.sclk_hdmi);
+	if (hdata->type != HDMI_TYPE14_7) {
+		clk_disable_unprepare(hdata->res.sclk_hdmi);
+		clk_set_parent(hdata->res.mout_hdmi, hdata->res.sclk_hdmiphy);
+		clk_prepare_enable(hdata->res.sclk_hdmi);
+	}
 
 	/* enable HDMI and timing generator */
 	hdmi_start(hdata, true);
@@ -1671,9 +1738,11 @@ static void hdmiphy_conf_reset(struct hdmi_context *hdata)
 {
 	u32 reg;
 
-	clk_disable_unprepare(hdata->res.sclk_hdmi);
-	clk_set_parent(hdata->res.mout_hdmi, hdata->res.sclk_pixel);
-	clk_prepare_enable(hdata->res.sclk_hdmi);
+	if (hdata->type != HDMI_TYPE14_7) {
+		clk_disable_unprepare(hdata->res.sclk_hdmi);
+		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,
@@ -1693,7 +1762,7 @@ static void hdmiphy_conf_reset(struct hdmi_context *hdata)
 
 static void hdmiphy_poweron(struct hdmi_context *hdata)
 {
-	if (hdata->type != HDMI_TYPE14)
+	if ((hdata->type != HDMI_TYPE14) || (hdata->type != HDMI_TYPE14_7))
 		return;
 
 	DRM_DEBUG_KMS("\n");
@@ -1713,7 +1782,7 @@ static void hdmiphy_poweron(struct hdmi_context *hdata)
 
 static void hdmiphy_poweroff(struct hdmi_context *hdata)
 {
-	if (hdata->type != HDMI_TYPE14)
+	if ((hdata->type != HDMI_TYPE14) || (hdata->type != HDMI_TYPE14_7))
 		return;
 
 	DRM_DEBUG_KMS("\n");
@@ -2042,6 +2111,10 @@ static void hdmi_poweron(struct hdmi_context *hdata)
 		return;
 	}
 
+	if (hdata->type == HDMI_TYPE14_7)
+		regmap_update_bits(hdata->sysreg, SYSREG_DISP_HDMI_PHY,
+					SYSREG_HDMI_REFCLK_SEL, 1);
+
 	hdata->powered = true;
 
 	mutex_unlock(&hdata->hdmi_mutex);
@@ -2056,7 +2129,19 @@ static void hdmi_poweron(struct hdmi_context *hdata)
 			PMU_HDMI_PHY_ENABLE_BIT, 1);
 
 	clk_prepare_enable(res->hdmi);
-	clk_prepare_enable(res->sclk_hdmi);
+	if (hdata->type != HDMI_TYPE14_7)
+		clk_prepare_enable(res->sclk_hdmi);
+	else
+		clk_prepare_enable(res->pclk_hdmiphy);
+
+	if (hdata->type == HDMI_TYPE14_7)
+		hdmi_reg_writemask(hdata, HDMI_PHY_CON_0, 0,
+					HDMI_PHY_POWER_OFF_EN);
+
+	if (hdata->type == HDMI_TYPE14_7) {
+		clk_prepare_enable(res->hdmi_pixel);
+		clk_prepare_enable(res->hdmi_tmds);
+	}
 
 	hdmiphy_poweron(hdata);
 	hdmi_commit(&hdata->display);
@@ -2074,13 +2159,29 @@ static void hdmi_poweroff(struct hdmi_context *hdata)
 	/* HDMI System Disable */
 	hdmi_reg_writemask(hdata, HDMI_CON_0, 0, HDMI_EN);
 
+	if (hdata->type == HDMI_TYPE14_7) {
+		clk_disable_unprepare(res->hdmi_pixel);
+		clk_disable_unprepare(res->hdmi_tmds);
+	}
+
+	if (hdata->type == HDMI_TYPE14_7)
+		hdmi_reg_writemask(hdata, HDMI_PHY_CON_0, ~0,
+					HDMI_PHY_POWER_OFF_EN);
+
 	hdmiphy_poweroff(hdata);
 
 	cancel_delayed_work(&hdata->hotplug_work);
 
-	clk_disable_unprepare(res->sclk_hdmi);
+	if (hdata->type != HDMI_TYPE14_7)
+		clk_disable_unprepare(res->sclk_hdmi);
+	else
+		clk_disable_unprepare(res->pclk_hdmiphy);
 	clk_disable_unprepare(res->hdmi);
 
+	if (hdata->type == HDMI_TYPE14_7)
+		regmap_update_bits(hdata->sysreg, SYSREG_DISP_HDMI_PHY,
+					SYSREG_HDMI_REFCLK_SEL, 0);
+
 	/* reset pmu hdmiphy control bit to disable hdmiphy */
 	regmap_update_bits(hdata->pmureg, PMU_HDMI_PHY_CONTROL,
 			PMU_HDMI_PHY_ENABLE_BIT, 0);
@@ -2121,10 +2222,12 @@ static void hdmi_dpms(struct exynos_drm_display *display, int mode)
 		 * Below codes will try to disable Mixer and VP(if used)
 		 * prior to disabling HDMI.
 		 */
-		if (crtc)
-			funcs = crtc->helper_private;
-		if (funcs && funcs->dpms)
-			(*funcs->dpms)(crtc, mode);
+		if (hdata->type != HDMI_TYPE14_7) {
+			if (crtc)
+				funcs = crtc->helper_private;
+			if (funcs && funcs->dpms)
+				(*funcs->dpms)(crtc, mode);
+		}
 
 		hdmi_poweroff(hdata);
 		break;
@@ -2166,6 +2269,31 @@ static irqreturn_t hdmi_irq_thread(int irq, void *arg)
 	return IRQ_HANDLED;
 }
 
+static int hdmi_configure_gpios(struct hdmi_context *hdata)
+{
+	struct gpio_desc *dcdc_gpio, *lsen_gpio;
+	int err;
+
+	dcdc_gpio = devm_gpiod_get_optional(hdata->dev, "dcdc", GPIOD_OUT_LOW);
+	if (IS_ERR(dcdc_gpio)) {
+		err = PTR_ERR(dcdc_gpio);
+		dev_err(hdata->dev, "failed to request GPIO: %d\n", err);
+		return err;
+	}
+
+	lsen_gpio = devm_gpiod_get_optional(hdata->dev, "lsen", GPIOD_OUT_LOW);
+	if (IS_ERR(lsen_gpio)) {
+		err = PTR_ERR(lsen_gpio);
+		dev_err(hdata->dev, "failed to request GPIO: %d\n", err);
+		return err;
+	}
+
+	gpiod_set_value(dcdc_gpio, 1);
+	gpiod_set_value(lsen_gpio, 1);
+
+	return 0;
+}
+
 static int hdmi_resources_init(struct hdmi_context *hdata)
 {
 	struct device *dev = hdata->dev;
@@ -2179,6 +2307,10 @@ static int hdmi_resources_init(struct hdmi_context *hdata)
 
 	DRM_DEBUG_KMS("HDMI resource init\n");
 
+	ret = hdmi_configure_gpios(hdata);
+	if (ret)
+		goto fail;
+
 	/* get clocks, power */
 	res->hdmi = devm_clk_get(dev, "hdmi");
 	if (IS_ERR(res->hdmi)) {
@@ -2186,32 +2318,55 @@ static int hdmi_resources_init(struct hdmi_context *hdata)
 		ret = PTR_ERR(res->hdmi);
 		goto fail;
 	}
-	res->sclk_hdmi = devm_clk_get(dev, "sclk_hdmi");
-	if (IS_ERR(res->sclk_hdmi)) {
-		DRM_ERROR("failed to get clock 'sclk_hdmi'\n");
-		ret = PTR_ERR(res->sclk_hdmi);
-		goto fail;
-	}
-	res->sclk_pixel = devm_clk_get(dev, "sclk_pixel");
-	if (IS_ERR(res->sclk_pixel)) {
-		DRM_ERROR("failed to get clock 'sclk_pixel'\n");
-		ret = PTR_ERR(res->sclk_pixel);
-		goto fail;
-	}
-	res->sclk_hdmiphy = devm_clk_get(dev, "sclk_hdmiphy");
-	if (IS_ERR(res->sclk_hdmiphy)) {
-		DRM_ERROR("failed to get clock 'sclk_hdmiphy'\n");
-		ret = PTR_ERR(res->sclk_hdmiphy);
-		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");
-		ret = PTR_ERR(res->mout_hdmi);
-		goto fail;
-	}
 
-	clk_set_parent(res->mout_hdmi, res->sclk_pixel);
+	if (hdata->type != HDMI_TYPE14_7) {
+		res->sclk_hdmi = devm_clk_get(dev, "sclk_hdmi");
+		if (IS_ERR(res->sclk_hdmi)) {
+			DRM_ERROR("failed to get clock 'sclk_hdmi'\n");
+			ret = PTR_ERR(res->sclk_hdmi);
+			goto fail;
+		}
+		res->sclk_pixel = devm_clk_get(dev, "sclk_pixel");
+		if (IS_ERR(res->sclk_pixel)) {
+			DRM_ERROR("failed to get clock 'sclk_pixel'\n");
+			ret = PTR_ERR(res->sclk_pixel);
+			goto fail;
+		}
+		res->sclk_hdmiphy = devm_clk_get(dev, "sclk_hdmiphy");
+		if (IS_ERR(res->sclk_hdmiphy)) {
+			DRM_ERROR("failed to get clock 'sclk_hdmiphy'\n");
+			ret = PTR_ERR(res->sclk_hdmiphy);
+			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");
+			ret = PTR_ERR(res->mout_hdmi);
+			goto fail;
+		}
+
+		clk_set_parent(res->mout_hdmi, res->sclk_pixel);
+	} else {
+
+		res->pclk_hdmiphy = clk_get(dev, "pclk_hdmiphy");
+		if (IS_ERR_OR_NULL(res->pclk_hdmiphy)) {
+			DRM_ERROR("failed to get clock 'pclk_hdmiphy'\n");
+			ret = PTR_ERR(res->pclk_hdmiphy);
+			goto fail;
+		}
+		res->hdmi_pixel = clk_get(dev, "hdmi_pixel");
+		if (IS_ERR_OR_NULL(res->hdmi_pixel)) {
+			DRM_ERROR("failed to get clock 'hdmi_pixel'\n");
+			ret = PTR_ERR(res->hdmi_pixel);
+			goto fail;
+		}
+		res->hdmi_tmds = clk_get(dev, "hdmi_tmds");
+		if (IS_ERR_OR_NULL(res->hdmi_tmds)) {
+			DRM_ERROR("failed to get clock 'hdmi_tmds'\n");
+			ret = PTR_ERR(res->hdmi_tmds);
+			goto fail;
+		}
+	}
 
 	res->regul_bulk = devm_kzalloc(dev, ARRAY_SIZE(supply) *
 		sizeof(res->regul_bulk[0]), GFP_KERNEL);
@@ -2288,6 +2443,9 @@ static struct of_device_id hdmi_match_types[] = {
 		.compatible = "samsung,exynos5420-hdmi",
 		.data = &exynos5420_hdmi_driver_data,
 	}, {
+		.compatible = "samsung,exynos7-hdmi",
+		.data = &exynos7_hdmi_driver_data,
+	}, {
 		/* end node */
 	}
 };
@@ -2474,6 +2632,16 @@ out_get_phy_port:
 		goto err_hdmiphy;
 	}
 
+	if (hdata->type == HDMI_TYPE14_7) {
+		hdata->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
+			"samsung,sysreg-phandle");
+		if (IS_ERR(hdata->sysreg)) {
+			DRM_ERROR("sysreg regmap lookup failed.\n");
+			ret = -EPROBE_DEFER;
+			goto err_hdmiphy;
+		}
+	}
+
 	pm_runtime_enable(dev);
 
 	ret = component_add(&pdev->dev, &hdmi_component_ops);
diff --git a/drivers/gpu/drm/exynos/regs-hdmi.h b/drivers/gpu/drm/exynos/regs-hdmi.h
index 3f35ac6..d6c84e0 100644
--- a/drivers/gpu/drm/exynos/regs-hdmi.h
+++ b/drivers/gpu/drm/exynos/regs-hdmi.h
@@ -133,6 +133,7 @@
 
 /* HDMI_CON_0 */
 #define HDMI_BLUE_SCR_EN		(1 << 5)
+#define HDMI_ENCODING_RETAIN		(1 << 4)
 #define HDMI_ASP_EN			(1 << 2)
 #define HDMI_ASP_DIS			(0 << 2)
 #define HDMI_ASP_MASK			(1 << 2)
@@ -594,4 +595,7 @@
 #define PMU_HDMI_PHY_CONTROL		0x700
 #define PMU_HDMI_PHY_ENABLE_BIT		BIT(0)
 
+#define SYSREG_DISP_HDMI_PHY		0x838
+#define SYSREG_HDMI_REFCLK_SEL		BIT(0)
+
 #endif /* SAMSUNG_REGS_HDMI_H */
-- 
1.7.9.5

--
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




[Index of Archives]     [Linux SoC Development]     [Linux Rockchip Development]     [Linux USB Development]     [Video for Linux]     [Linux Audio Users]     [Linux SCSI]     [Yosemite News]

  Powered by Linux