1 files changed, 367 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c
new file mode 100644
index 00000000000..823eee521a3
--- /dev/null
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c
@@ -0,0 +1,367 @@
+/*
+ * Copyright (C) 2013 Red Hat
+ * Author: Rob Clark <robdclark@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/gpio.h>
+
+#include "hdmi.h"
+
+struct hdmi_connector {
+	struct drm_connector base;
+	struct hdmi *hdmi;
+};
+#define to_hdmi_connector(x) container_of(x, struct hdmi_connector, base)
+
+static int gpio_config(struct hdmi *hdmi, bool on)
+{
+	struct drm_device *dev = hdmi->dev;
+	struct hdmi_platform_config *config =
+			hdmi->pdev->dev.platform_data;
+	int ret;
+
+	if (on) {
+		ret = gpio_request(config->ddc_clk_gpio, "HDMI_DDC_CLK");
+		if (ret) {
+			dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n",
+				"HDMI_DDC_CLK", config->ddc_clk_gpio, ret);
+			goto error1;
+		}
+		ret = gpio_request(config->ddc_data_gpio, "HDMI_DDC_DATA");
+		if (ret) {
+			dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n",
+				"HDMI_DDC_DATA", config->ddc_data_gpio, ret);
+			goto error2;
+		}
+		ret = gpio_request(config->hpd_gpio, "HDMI_HPD");
+		if (ret) {
+			dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n",
+				"HDMI_HPD", config->hpd_gpio, ret);
+			goto error3;
+		}
+		if (config->pmic_gpio != -1) {
+			ret = gpio_request(config->pmic_gpio, "PMIC_HDMI_MUX_SEL");
+			if (ret) {
+				dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n",
+					"PMIC_HDMI_MUX_SEL", config->pmic_gpio, ret);
+				goto error4;
+			}
+			gpio_set_value_cansleep(config->pmic_gpio, 0);
+		}
+		DBG("gpio on");
+	} else {
+		gpio_free(config->ddc_clk_gpio);
+		gpio_free(config->ddc_data_gpio);
+		gpio_free(config->hpd_gpio);
+
+		if (config->pmic_gpio != -1) {
+			gpio_set_value_cansleep(config->pmic_gpio, 1);
+			gpio_free(config->pmic_gpio);
+		}
+		DBG("gpio off");
+	}
+
+	return 0;
+
+error4:
+	gpio_free(config->hpd_gpio);
+error3:
+	gpio_free(config->ddc_data_gpio);
+error2:
+	gpio_free(config->ddc_clk_gpio);
+error1:
+	return ret;
+}
+
+static int hpd_enable(struct hdmi_connector *hdmi_connector)
+{
+	struct hdmi *hdmi = hdmi_connector->hdmi;
+	struct drm_device *dev = hdmi_connector->base.dev;
+	struct hdmi_phy *phy = hdmi->phy;
+	uint32_t hpd_ctrl;
+	int ret;
+
+	ret = gpio_config(hdmi, true);
+	if (ret) {
+		dev_err(dev->dev, "failed to configure GPIOs: %d\n", ret);
+		goto fail;
+	}
+
+	ret = clk_prepare_enable(hdmi->clk);
+	if (ret) {
+		dev_err(dev->dev, "failed to enable 'clk': %d\n", ret);
+		goto fail;
+	}
+
+	ret = clk_prepare_enable(hdmi->m_pclk);
+	if (ret) {
+		dev_err(dev->dev, "failed to enable 'm_pclk': %d\n", ret);
+		goto fail;
+	}
+
+	ret = clk_prepare_enable(hdmi->s_pclk);
+	if (ret) {
+		dev_err(dev->dev, "failed to enable 's_pclk': %d\n", ret);
+		goto fail;
+	}
+
+	if (hdmi->mpp0)
+		ret = regulator_enable(hdmi->mpp0);
+	if (!ret)
+		ret = regulator_enable(hdmi->mvs);
+	if (ret) {
+		dev_err(dev->dev, "failed to enable regulators: %d\n", ret);
+		goto fail;
+	}
+
+	hdmi_set_mode(hdmi, false);
+	phy->funcs->reset(phy);
+	hdmi_set_mode(hdmi, true);
+
+	hdmi_write(hdmi, REG_HDMI_USEC_REFTIMER, 0x0001001b);
+
+	/* enable HPD events: */
+	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
+			HDMI_HPD_INT_CTRL_INT_CONNECT |
+			HDMI_HPD_INT_CTRL_INT_EN);
+
+	/* set timeout to 4.1ms (max) for hardware debounce */
+	hpd_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_CTRL);
+	hpd_ctrl |= HDMI_HPD_CTRL_TIMEOUT(0x1fff);
+
+	/* Toggle HPD circuit to trigger HPD sense */
+	hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
+			~HDMI_HPD_CTRL_ENABLE & hpd_ctrl);
+	hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
+			HDMI_HPD_CTRL_ENABLE | hpd_ctrl);
+
+	return 0;
+
+fail:
+	return ret;
+}
+
+static int hdp_disable(struct hdmi_connector *hdmi_connector)
+{
+	struct hdmi *hdmi = hdmi_connector->hdmi;
+	struct drm_device *dev = hdmi_connector->base.dev;
+	int ret = 0;
+
+	/* Disable HPD interrupt */
+	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, 0);
+
+	hdmi_set_mode(hdmi, false);
+
+	if (hdmi->mpp0)
+		ret = regulator_disable(hdmi->mpp0);
+	if (!ret)
+		ret = regulator_disable(hdmi->mvs);
+	if (ret) {
+		dev_err(dev->dev, "failed to enable regulators: %d\n", ret);
+		goto fail;
+	}
+
+	clk_disable_unprepare(hdmi->clk);
+	clk_disable_unprepare(hdmi->m_pclk);
+	clk_disable_unprepare(hdmi->s_pclk);
+
+	ret = gpio_config(hdmi, false);
+	if (ret) {
+		dev_err(dev->dev, "failed to unconfigure GPIOs: %d\n", ret);
+		goto fail;
+	}
+
+	return 0;
+
+fail:
+	return ret;
+}
+
+void hdmi_connector_irq(struct drm_connector *connector)
+{
+	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
+	struct hdmi *hdmi = hdmi_connector->hdmi;
+	uint32_t hpd_int_status, hpd_int_ctrl;
+
+	/* Process HPD: */
+	hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
+	hpd_int_ctrl   = hdmi_read(hdmi, REG_HDMI_HPD_INT_CTRL);
+
+	if ((hpd_int_ctrl & HDMI_HPD_INT_CTRL_INT_EN) &&
+			(hpd_int_status & HDMI_HPD_INT_STATUS_INT)) {
+		bool detected = !!(hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED);
+
+		DBG("status=%04x, ctrl=%04x", hpd_int_status, hpd_int_ctrl);
+
+		/* ack the irq: */
+		hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
+				hpd_int_ctrl | HDMI_HPD_INT_CTRL_INT_ACK);
+
+		drm_helper_hpd_irq_event(connector->dev);
+
+		/* detect disconnect if we are connected or visa versa: */
+		hpd_int_ctrl = HDMI_HPD_INT_CTRL_INT_EN;
+		if (!detected)
+			hpd_int_ctrl |= HDMI_HPD_INT_CTRL_INT_CONNECT;
+		hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl);
+	}
+}
+
+static enum drm_connector_status hdmi_connector_detect(
+		struct drm_connector *connector, bool force)
+{
+	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
+	struct hdmi *hdmi = hdmi_connector->hdmi;
+	uint32_t hpd_int_status;
+	int retry = 20;
+
+	hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
+
+	/* sense seems to in some cases be momentarily de-asserted, don't
+	 * let that trick us into thinking the monitor is gone:
+	 */
+	while (retry-- && !(hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED)) {
+		mdelay(10);
+		hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
+		DBG("status=%08x", hpd_int_status);
+	}
+
+	return (hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED) ?
+			connector_status_connected : connector_status_disconnected;
+}
+
+static void hdmi_connector_destroy(struct drm_connector *connector)
+{
+	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
+
+	hdp_disable(hdmi_connector);
+
+	drm_sysfs_connector_remove(connector);
+	drm_connector_cleanup(connector);
+
+	hdmi_unreference(hdmi_connector->hdmi);
+
+	kfree(hdmi_connector);
+}
+
+static int hdmi_connector_get_modes(struct drm_connector *connector)
+{
+	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
+	struct hdmi *hdmi = hdmi_connector->hdmi;
+	struct edid *edid;
+	uint32_t hdmi_ctrl;
+	int ret = 0;
+
+	hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL);
+	hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE);
+
+	edid = drm_get_edid(connector, hdmi->i2c);
+
+	hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);
+
+	drm_mode_connector_update_edid_property(connector, edid);
+
+	if (edid) {
+		ret = drm_add_edid_modes(connector, edid);
+		kfree(edid);
+	}
+
+	return ret;
+}
+
+static int hdmi_connector_mode_valid(struct drm_connector *connector,
+				 struct drm_display_mode *mode)
+{
+	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
+	struct msm_drm_private *priv = connector->dev->dev_private;
+	struct msm_kms *kms = priv->kms;
+	long actual, requested;
+
+	requested = 1000 * mode->clock;
+	actual = kms->funcs->round_pixclk(kms,
+			requested, hdmi_connector->hdmi->encoder);
+
+	DBG("requested=%ld, actual=%ld", requested, actual);
+
+	if (actual != requested)
+		return MODE_CLOCK_RANGE;
+
+	return 0;
+}
+
+static struct drm_encoder *
+hdmi_connector_best_encoder(struct drm_connector *connector)
+{
+	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
+	return hdmi_connector->hdmi->encoder;
+}
+
+static const struct drm_connector_funcs hdmi_connector_funcs = {
+	.dpms = drm_helper_connector_dpms,
+	.detect = hdmi_connector_detect,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = hdmi_connector_destroy,
+};
+
+static const struct drm_connector_helper_funcs hdmi_connector_helper_funcs = {
+	.get_modes = hdmi_connector_get_modes,
+	.mode_valid = hdmi_connector_mode_valid,
+	.best_encoder = hdmi_connector_best_encoder,
+};
+
+/* initialize connector */
+struct drm_connector *hdmi_connector_init(struct hdmi *hdmi)
+{
+	struct drm_connector *connector = NULL;
+	struct hdmi_connector *hdmi_connector;
+	int ret;
+
+	hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL);
+	if (!hdmi_connector) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	hdmi_connector->hdmi = hdmi_reference(hdmi);
+
+	connector = &hdmi_connector->base;
+
+	drm_connector_init(hdmi->dev, connector, &hdmi_connector_funcs,
+			DRM_MODE_CONNECTOR_HDMIA);
+	drm_connector_helper_add(connector, &hdmi_connector_helper_funcs);
+
+	connector->polled = DRM_CONNECTOR_POLL_HPD;
+
+	connector->interlace_allowed = 1;
+	connector->doublescan_allowed = 0;
+
+	drm_sysfs_connector_add(connector);
+
+	ret = hpd_enable(hdmi_connector);
+	if (ret) {
+		dev_err(hdmi->dev->dev, "failed to enable HPD: %d\n", ret);
+		goto fail;
+	}
+
+	drm_mode_connector_attach_encoder(connector, hdmi->encoder);
+
+	return connector;
+
+fail:
+	if (connector)
+		hdmi_connector_destroy(connector);
+
+	return ERR_PTR(ret);
+}