hdmi/hdmi.o \
hdmi/hdmi_audio.o \
hdmi/hdmi_bridge.o \
- hdmi/hdmi_connector.o \
+ hdmi/hdmi_hpd.o \
hdmi/hdmi_i2c.o \
hdmi/hdmi_phy.o \
hdmi/hdmi_phy_8960.o \
#include <linux/of_irq.h>
#include <linux/of_gpio.h>
+#include <drm/drm_bridge_connector.h>
+
#include <sound/hdmi-codec.h>
#include "hdmi.h"
struct hdmi *hdmi = dev_id;
/* Process HPD: */
- msm_hdmi_connector_irq(hdmi->connector);
+ msm_hdmi_hpd_irq(hdmi->bridge);
/* Process DDC: */
msm_hdmi_i2c_irq(hdmi->i2c);
goto fail;
}
- hdmi->connector = msm_hdmi_connector_init(hdmi);
+ hdmi->connector = drm_bridge_connector_init(hdmi->dev, encoder);
if (IS_ERR(hdmi->connector)) {
ret = PTR_ERR(hdmi->connector);
DRM_DEV_ERROR(dev->dev, "failed to create HDMI connector: %d\n", ret);
goto fail;
}
+ drm_connector_attach_encoder(hdmi->connector, hdmi->encoder);
+
hdmi->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
if (hdmi->irq < 0) {
ret = hdmi->irq;
goto fail;
}
- ret = msm_hdmi_hpd_enable(hdmi->connector);
+ drm_bridge_connector_enable_hpd(hdmi->connector);
+
+ ret = msm_hdmi_hpd_enable(hdmi->bridge);
if (ret < 0) {
DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret);
goto fail;
struct hdmi_gpio_data gpios[HDMI_MAX_NUM_GPIO];
};
+struct hdmi_bridge {
+ struct drm_bridge base;
+ struct hdmi *hdmi;
+ struct work_struct hpd_work;
+};
+#define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base)
+
void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on);
static inline void hdmi_write(struct hdmi *hdmi, u32 reg, u32 data)
struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi);
void msm_hdmi_bridge_destroy(struct drm_bridge *bridge);
-/*
- * hdmi connector:
- */
-
-void msm_hdmi_connector_irq(struct drm_connector *connector);
-struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi);
-int msm_hdmi_hpd_enable(struct drm_connector *connector);
+void msm_hdmi_hpd_irq(struct drm_bridge *bridge);
+enum drm_connector_status msm_hdmi_bridge_detect(
+ struct drm_bridge *bridge);
+int msm_hdmi_hpd_enable(struct drm_bridge *bridge);
+void msm_hdmi_hpd_disable(struct hdmi_bridge *hdmi_bridge);
/*
* i2c adapter for ddc:
*/
#include <linux/delay.h>
+#include <drm/drm_bridge_connector.h>
+#include "msm_kms.h"
#include "hdmi.h"
-struct hdmi_bridge {
- struct drm_bridge base;
- struct hdmi *hdmi;
-};
-#define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base)
-
void msm_hdmi_bridge_destroy(struct drm_bridge *bridge)
{
+ struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
+
+ msm_hdmi_hpd_disable(hdmi_bridge);
}
static void msm_hdmi_power_on(struct drm_bridge *bridge)
msm_hdmi_audio_update(hdmi);
}
+static struct edid *msm_hdmi_bridge_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
+ struct hdmi *hdmi = hdmi_bridge->hdmi;
+ struct edid *edid;
+ uint32_t hdmi_ctrl;
+
+ 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);
+
+ hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid);
+
+ return edid;
+}
+
+static enum drm_mode_status msm_hdmi_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
+ struct hdmi *hdmi = hdmi_bridge->hdmi;
+ const struct hdmi_platform_config *config = hdmi->config;
+ struct msm_drm_private *priv = bridge->dev->dev_private;
+ struct msm_kms *kms = priv->kms;
+ long actual, requested;
+
+ requested = 1000 * mode->clock;
+ actual = kms->funcs->round_pixclk(kms,
+ requested, hdmi_bridge->hdmi->encoder);
+
+ /* for mdp5/apq8074, we manage our own pixel clk (as opposed to
+ * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder
+ * instead):
+ */
+ if (config->pwr_clk_cnt > 0)
+ actual = clk_round_rate(hdmi->pwr_clks[0], actual);
+
+ DBG("requested=%ld, actual=%ld", requested, actual);
+
+ if (actual != requested)
+ return MODE_CLOCK_RANGE;
+
+ return 0;
+}
+
static const struct drm_bridge_funcs msm_hdmi_bridge_funcs = {
.pre_enable = msm_hdmi_bridge_pre_enable,
.enable = msm_hdmi_bridge_enable,
.disable = msm_hdmi_bridge_disable,
.post_disable = msm_hdmi_bridge_post_disable,
.mode_set = msm_hdmi_bridge_mode_set,
+ .mode_valid = msm_hdmi_bridge_mode_valid,
+ .get_edid = msm_hdmi_bridge_get_edid,
+ .detect = msm_hdmi_bridge_detect,
};
+static void
+msm_hdmi_hotplug_work(struct work_struct *work)
+{
+ struct hdmi_bridge *hdmi_bridge =
+ container_of(work, struct hdmi_bridge, hpd_work);
+ struct drm_bridge *bridge = &hdmi_bridge->base;
+
+ drm_bridge_hpd_notify(bridge, drm_bridge_detect(bridge));
+}
/* initialize bridge */
struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi)
}
hdmi_bridge->hdmi = hdmi;
+ INIT_WORK(&hdmi_bridge->hpd_work, msm_hdmi_hotplug_work);
bridge = &hdmi_bridge->base;
bridge->funcs = &msm_hdmi_bridge_funcs;
+ bridge->ddc = hdmi->i2c;
+ bridge->type = DRM_MODE_CONNECTOR_HDMIA;
+ bridge->ops = DRM_BRIDGE_OP_HPD |
+ DRM_BRIDGE_OP_DETECT |
+ DRM_BRIDGE_OP_EDID;
- ret = drm_bridge_attach(hdmi->encoder, bridge, NULL, 0);
+ ret = drm_bridge_attach(hdmi->encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);
if (ret)
goto fail;
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) 2013 Red Hat
- * Author: Rob Clark <robdclark@gmail.com>
- */
-
-#include <linux/delay.h>
-#include <linux/gpio/consumer.h>
-#include <linux/pinctrl/consumer.h>
-
-#include "msm_kms.h"
-#include "hdmi.h"
-
-struct hdmi_connector {
- struct drm_connector base;
- struct hdmi *hdmi;
- struct work_struct hpd_work;
-};
-#define to_hdmi_connector(x) container_of(x, struct hdmi_connector, base)
-
-static void msm_hdmi_phy_reset(struct hdmi *hdmi)
-{
- unsigned int val;
-
- val = hdmi_read(hdmi, REG_HDMI_PHY_CTRL);
-
- if (val & HDMI_PHY_CTRL_SW_RESET_LOW) {
- /* pull low */
- hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
- val & ~HDMI_PHY_CTRL_SW_RESET);
- } else {
- /* pull high */
- hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
- val | HDMI_PHY_CTRL_SW_RESET);
- }
-
- if (val & HDMI_PHY_CTRL_SW_RESET_PLL_LOW) {
- /* pull low */
- hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
- val & ~HDMI_PHY_CTRL_SW_RESET_PLL);
- } else {
- /* pull high */
- hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
- val | HDMI_PHY_CTRL_SW_RESET_PLL);
- }
-
- msleep(100);
-
- if (val & HDMI_PHY_CTRL_SW_RESET_LOW) {
- /* pull high */
- hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
- val | HDMI_PHY_CTRL_SW_RESET);
- } else {
- /* pull low */
- hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
- val & ~HDMI_PHY_CTRL_SW_RESET);
- }
-
- if (val & HDMI_PHY_CTRL_SW_RESET_PLL_LOW) {
- /* pull high */
- hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
- val | HDMI_PHY_CTRL_SW_RESET_PLL);
- } else {
- /* pull low */
- hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
- val & ~HDMI_PHY_CTRL_SW_RESET_PLL);
- }
-}
-
-static int gpio_config(struct hdmi *hdmi, bool on)
-{
- const struct hdmi_platform_config *config = hdmi->config;
- int i;
-
- if (on) {
- for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) {
- struct hdmi_gpio_data gpio = config->gpios[i];
-
- if (gpio.gpiod) {
- if (gpio.output) {
- gpiod_direction_output(gpio.gpiod,
- gpio.value);
- } else {
- gpiod_direction_input(gpio.gpiod);
- gpiod_set_value_cansleep(gpio.gpiod,
- gpio.value);
- }
- }
- }
-
- DBG("gpio on");
- } else {
- for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) {
- struct hdmi_gpio_data gpio = config->gpios[i];
-
- if (!gpio.gpiod)
- continue;
-
- if (gpio.output) {
- int value = gpio.value ? 0 : 1;
-
- gpiod_set_value_cansleep(gpio.gpiod, value);
- }
- }
-
- DBG("gpio off");
- }
-
- return 0;
-}
-
-static void enable_hpd_clocks(struct hdmi *hdmi, bool enable)
-{
- const struct hdmi_platform_config *config = hdmi->config;
- struct device *dev = &hdmi->pdev->dev;
- int i, ret;
-
- if (enable) {
- for (i = 0; i < config->hpd_clk_cnt; i++) {
- if (config->hpd_freq && config->hpd_freq[i]) {
- ret = clk_set_rate(hdmi->hpd_clks[i],
- config->hpd_freq[i]);
- if (ret)
- dev_warn(dev,
- "failed to set clk %s (%d)\n",
- config->hpd_clk_names[i], ret);
- }
-
- ret = clk_prepare_enable(hdmi->hpd_clks[i]);
- if (ret) {
- DRM_DEV_ERROR(dev,
- "failed to enable hpd clk: %s (%d)\n",
- config->hpd_clk_names[i], ret);
- }
- }
- } else {
- for (i = config->hpd_clk_cnt - 1; i >= 0; i--)
- clk_disable_unprepare(hdmi->hpd_clks[i]);
- }
-}
-
-int msm_hdmi_hpd_enable(struct drm_connector *connector)
-{
- struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
- struct hdmi *hdmi = hdmi_connector->hdmi;
- const struct hdmi_platform_config *config = hdmi->config;
- struct device *dev = &hdmi->pdev->dev;
- uint32_t hpd_ctrl;
- int i, ret;
- unsigned long flags;
-
- for (i = 0; i < config->hpd_reg_cnt; i++) {
- ret = regulator_enable(hdmi->hpd_regs[i]);
- if (ret) {
- DRM_DEV_ERROR(dev, "failed to enable hpd regulator: %s (%d)\n",
- config->hpd_reg_names[i], ret);
- goto fail;
- }
- }
-
- ret = pinctrl_pm_select_default_state(dev);
- if (ret) {
- DRM_DEV_ERROR(dev, "pinctrl state chg failed: %d\n", ret);
- goto fail;
- }
-
- ret = gpio_config(hdmi, true);
- if (ret) {
- DRM_DEV_ERROR(dev, "failed to configure GPIOs: %d\n", ret);
- goto fail;
- }
-
- pm_runtime_get_sync(dev);
- enable_hpd_clocks(hdmi, true);
-
- msm_hdmi_set_mode(hdmi, false);
- msm_hdmi_phy_reset(hdmi);
- msm_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 */
- spin_lock_irqsave(&hdmi->reg_lock, flags);
- 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);
- spin_unlock_irqrestore(&hdmi->reg_lock, flags);
-
- return 0;
-
-fail:
- return ret;
-}
-
-static void hdp_disable(struct hdmi_connector *hdmi_connector)
-{
- struct hdmi *hdmi = hdmi_connector->hdmi;
- const struct hdmi_platform_config *config = hdmi->config;
- struct device *dev = &hdmi->pdev->dev;
- int i, ret = 0;
-
- /* Disable HPD interrupt */
- hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, 0);
-
- msm_hdmi_set_mode(hdmi, false);
-
- enable_hpd_clocks(hdmi, false);
- pm_runtime_put_autosuspend(dev);
-
- ret = gpio_config(hdmi, false);
- if (ret)
- dev_warn(dev, "failed to unconfigure GPIOs: %d\n", ret);
-
- ret = pinctrl_pm_select_sleep_state(dev);
- if (ret)
- dev_warn(dev, "pinctrl state chg failed: %d\n", ret);
-
- for (i = 0; i < config->hpd_reg_cnt; i++) {
- ret = regulator_disable(hdmi->hpd_regs[i]);
- if (ret)
- dev_warn(dev, "failed to disable hpd regulator: %s (%d)\n",
- config->hpd_reg_names[i], ret);
- }
-}
-
-static void
-msm_hdmi_hotplug_work(struct work_struct *work)
-{
- struct hdmi_connector *hdmi_connector =
- container_of(work, struct hdmi_connector, hpd_work);
- struct drm_connector *connector = &hdmi_connector->base;
- drm_helper_hpd_irq_event(connector->dev);
-}
-
-void msm_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);
-
- /* ack & disable (temporarily) HPD events: */
- hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
- HDMI_HPD_INT_CTRL_INT_ACK);
-
- DBG("status=%04x, ctrl=%04x", hpd_int_status, hpd_int_ctrl);
-
- /* 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);
-
- queue_work(hdmi->workq, &hdmi_connector->hpd_work);
- }
-}
-
-static enum drm_connector_status detect_reg(struct hdmi *hdmi)
-{
- uint32_t hpd_int_status;
-
- pm_runtime_get_sync(&hdmi->pdev->dev);
- enable_hpd_clocks(hdmi, true);
-
- hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
-
- enable_hpd_clocks(hdmi, false);
- pm_runtime_put_autosuspend(&hdmi->pdev->dev);
-
- return (hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED) ?
- connector_status_connected : connector_status_disconnected;
-}
-
-#define HPD_GPIO_INDEX 2
-static enum drm_connector_status detect_gpio(struct hdmi *hdmi)
-{
- const struct hdmi_platform_config *config = hdmi->config;
- struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX];
-
- return gpiod_get_value(hpd_gpio.gpiod) ?
- connector_status_connected :
- connector_status_disconnected;
-}
-
-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;
- const struct hdmi_platform_config *config = hdmi->config;
- struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX];
- enum drm_connector_status stat_gpio, stat_reg;
- int retry = 20;
-
- /*
- * some platforms may not have hpd gpio. Rely only on the status
- * provided by REG_HDMI_HPD_INT_STATUS in this case.
- */
- if (!hpd_gpio.gpiod)
- return detect_reg(hdmi);
-
- do {
- stat_gpio = detect_gpio(hdmi);
- stat_reg = detect_reg(hdmi);
-
- if (stat_gpio == stat_reg)
- break;
-
- mdelay(10);
- } while (--retry);
-
- /* the status we get from reading gpio seems to be more reliable,
- * so trust that one the most if we didn't manage to get hdmi and
- * gpio status to agree:
- */
- if (stat_gpio != stat_reg) {
- DBG("HDMI_HPD_INT_STATUS tells us: %d", stat_reg);
- DBG("hpd gpio tells us: %d", stat_gpio);
- }
-
- return stat_gpio;
-}
-
-static void hdmi_connector_destroy(struct drm_connector *connector)
-{
- struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
-
- hdp_disable(hdmi_connector);
-
- drm_connector_cleanup(connector);
-
- kfree(hdmi_connector);
-}
-
-static int msm_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);
-
- hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid);
- drm_connector_update_edid_property(connector, edid);
-
- if (edid) {
- ret = drm_add_edid_modes(connector, edid);
- kfree(edid);
- }
-
- return ret;
-}
-
-static int msm_hdmi_connector_mode_valid(struct drm_connector *connector,
- struct drm_display_mode *mode)
-{
- struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
- struct hdmi *hdmi = hdmi_connector->hdmi;
- const struct hdmi_platform_config *config = hdmi->config;
- 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);
-
- /* for mdp5/apq8074, we manage our own pixel clk (as opposed to
- * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder
- * instead):
- */
- if (config->pwr_clk_cnt > 0)
- actual = clk_round_rate(hdmi->pwr_clks[0], actual);
-
- DBG("requested=%ld, actual=%ld", requested, actual);
-
- if (actual != requested)
- return MODE_CLOCK_RANGE;
-
- return 0;
-}
-
-static const struct drm_connector_funcs hdmi_connector_funcs = {
- .detect = hdmi_connector_detect,
- .fill_modes = drm_helper_probe_single_connector_modes,
- .destroy = hdmi_connector_destroy,
- .reset = drm_atomic_helper_connector_reset,
- .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
- .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-};
-
-static const struct drm_connector_helper_funcs msm_hdmi_connector_helper_funcs = {
- .get_modes = msm_hdmi_connector_get_modes,
- .mode_valid = msm_hdmi_connector_mode_valid,
-};
-
-/* initialize connector */
-struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi)
-{
- struct drm_connector *connector = NULL;
- struct hdmi_connector *hdmi_connector;
-
- hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL);
- if (!hdmi_connector)
- return ERR_PTR(-ENOMEM);
-
- hdmi_connector->hdmi = hdmi;
- INIT_WORK(&hdmi_connector->hpd_work, msm_hdmi_hotplug_work);
-
- connector = &hdmi_connector->base;
-
- drm_connector_init_with_ddc(hdmi->dev, connector,
- &hdmi_connector_funcs,
- DRM_MODE_CONNECTOR_HDMIA,
- hdmi->i2c);
- drm_connector_helper_add(connector, &msm_hdmi_connector_helper_funcs);
-
- connector->polled = DRM_CONNECTOR_POLL_CONNECT |
- DRM_CONNECTOR_POLL_DISCONNECT;
-
- connector->interlace_allowed = 0;
- connector->doublescan_allowed = 0;
-
- drm_connector_attach_encoder(connector, hdmi->encoder);
-
- return connector;
-}
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013 Red Hat
+ * Author: Rob Clark <robdclark@gmail.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/pinctrl/consumer.h>
+
+#include "msm_kms.h"
+#include "hdmi.h"
+
+static void msm_hdmi_phy_reset(struct hdmi *hdmi)
+{
+ unsigned int val;
+
+ val = hdmi_read(hdmi, REG_HDMI_PHY_CTRL);
+
+ if (val & HDMI_PHY_CTRL_SW_RESET_LOW) {
+ /* pull low */
+ hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
+ val & ~HDMI_PHY_CTRL_SW_RESET);
+ } else {
+ /* pull high */
+ hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
+ val | HDMI_PHY_CTRL_SW_RESET);
+ }
+
+ if (val & HDMI_PHY_CTRL_SW_RESET_PLL_LOW) {
+ /* pull low */
+ hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
+ val & ~HDMI_PHY_CTRL_SW_RESET_PLL);
+ } else {
+ /* pull high */
+ hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
+ val | HDMI_PHY_CTRL_SW_RESET_PLL);
+ }
+
+ msleep(100);
+
+ if (val & HDMI_PHY_CTRL_SW_RESET_LOW) {
+ /* pull high */
+ hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
+ val | HDMI_PHY_CTRL_SW_RESET);
+ } else {
+ /* pull low */
+ hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
+ val & ~HDMI_PHY_CTRL_SW_RESET);
+ }
+
+ if (val & HDMI_PHY_CTRL_SW_RESET_PLL_LOW) {
+ /* pull high */
+ hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
+ val | HDMI_PHY_CTRL_SW_RESET_PLL);
+ } else {
+ /* pull low */
+ hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
+ val & ~HDMI_PHY_CTRL_SW_RESET_PLL);
+ }
+}
+
+static int gpio_config(struct hdmi *hdmi, bool on)
+{
+ const struct hdmi_platform_config *config = hdmi->config;
+ int i;
+
+ if (on) {
+ for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) {
+ struct hdmi_gpio_data gpio = config->gpios[i];
+
+ if (gpio.gpiod) {
+ if (gpio.output) {
+ gpiod_direction_output(gpio.gpiod,
+ gpio.value);
+ } else {
+ gpiod_direction_input(gpio.gpiod);
+ gpiod_set_value_cansleep(gpio.gpiod,
+ gpio.value);
+ }
+ }
+ }
+
+ DBG("gpio on");
+ } else {
+ for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) {
+ struct hdmi_gpio_data gpio = config->gpios[i];
+
+ if (!gpio.gpiod)
+ continue;
+
+ if (gpio.output) {
+ int value = gpio.value ? 0 : 1;
+
+ gpiod_set_value_cansleep(gpio.gpiod, value);
+ }
+ }
+
+ DBG("gpio off");
+ }
+
+ return 0;
+}
+
+static void enable_hpd_clocks(struct hdmi *hdmi, bool enable)
+{
+ const struct hdmi_platform_config *config = hdmi->config;
+ struct device *dev = &hdmi->pdev->dev;
+ int i, ret;
+
+ if (enable) {
+ for (i = 0; i < config->hpd_clk_cnt; i++) {
+ if (config->hpd_freq && config->hpd_freq[i]) {
+ ret = clk_set_rate(hdmi->hpd_clks[i],
+ config->hpd_freq[i]);
+ if (ret)
+ dev_warn(dev,
+ "failed to set clk %s (%d)\n",
+ config->hpd_clk_names[i], ret);
+ }
+
+ ret = clk_prepare_enable(hdmi->hpd_clks[i]);
+ if (ret) {
+ DRM_DEV_ERROR(dev,
+ "failed to enable hpd clk: %s (%d)\n",
+ config->hpd_clk_names[i], ret);
+ }
+ }
+ } else {
+ for (i = config->hpd_clk_cnt - 1; i >= 0; i--)
+ clk_disable_unprepare(hdmi->hpd_clks[i]);
+ }
+}
+
+int msm_hdmi_hpd_enable(struct drm_bridge *bridge)
+{
+ struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
+ struct hdmi *hdmi = hdmi_bridge->hdmi;
+ const struct hdmi_platform_config *config = hdmi->config;
+ struct device *dev = &hdmi->pdev->dev;
+ uint32_t hpd_ctrl;
+ int i, ret;
+ unsigned long flags;
+
+ for (i = 0; i < config->hpd_reg_cnt; i++) {
+ ret = regulator_enable(hdmi->hpd_regs[i]);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "failed to enable hpd regulator: %s (%d)\n",
+ config->hpd_reg_names[i], ret);
+ goto fail;
+ }
+ }
+
+ ret = pinctrl_pm_select_default_state(dev);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "pinctrl state chg failed: %d\n", ret);
+ goto fail;
+ }
+
+ ret = gpio_config(hdmi, true);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "failed to configure GPIOs: %d\n", ret);
+ goto fail;
+ }
+
+ pm_runtime_get_sync(dev);
+ enable_hpd_clocks(hdmi, true);
+
+ msm_hdmi_set_mode(hdmi, false);
+ msm_hdmi_phy_reset(hdmi);
+ msm_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 */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ 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);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ return 0;
+
+fail:
+ return ret;
+}
+
+void msm_hdmi_hpd_disable(struct hdmi_bridge *hdmi_bridge)
+{
+ struct hdmi *hdmi = hdmi_bridge->hdmi;
+ const struct hdmi_platform_config *config = hdmi->config;
+ struct device *dev = &hdmi->pdev->dev;
+ int i, ret = 0;
+
+ /* Disable HPD interrupt */
+ hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, 0);
+
+ msm_hdmi_set_mode(hdmi, false);
+
+ enable_hpd_clocks(hdmi, false);
+ pm_runtime_put_autosuspend(dev);
+
+ ret = gpio_config(hdmi, false);
+ if (ret)
+ dev_warn(dev, "failed to unconfigure GPIOs: %d\n", ret);
+
+ ret = pinctrl_pm_select_sleep_state(dev);
+ if (ret)
+ dev_warn(dev, "pinctrl state chg failed: %d\n", ret);
+
+ for (i = 0; i < config->hpd_reg_cnt; i++) {
+ ret = regulator_disable(hdmi->hpd_regs[i]);
+ if (ret)
+ dev_warn(dev, "failed to disable hpd regulator: %s (%d)\n",
+ config->hpd_reg_names[i], ret);
+ }
+}
+
+void msm_hdmi_hpd_irq(struct drm_bridge *bridge)
+{
+ struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
+ struct hdmi *hdmi = hdmi_bridge->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);
+
+ /* ack & disable (temporarily) HPD events: */
+ hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
+ HDMI_HPD_INT_CTRL_INT_ACK);
+
+ DBG("status=%04x, ctrl=%04x", hpd_int_status, hpd_int_ctrl);
+
+ /* 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);
+
+ queue_work(hdmi->workq, &hdmi_bridge->hpd_work);
+ }
+}
+
+static enum drm_connector_status detect_reg(struct hdmi *hdmi)
+{
+ uint32_t hpd_int_status;
+
+ pm_runtime_get_sync(&hdmi->pdev->dev);
+ enable_hpd_clocks(hdmi, true);
+
+ hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
+
+ enable_hpd_clocks(hdmi, false);
+ pm_runtime_put_autosuspend(&hdmi->pdev->dev);
+
+ return (hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED) ?
+ connector_status_connected : connector_status_disconnected;
+}
+
+#define HPD_GPIO_INDEX 2
+static enum drm_connector_status detect_gpio(struct hdmi *hdmi)
+{
+ const struct hdmi_platform_config *config = hdmi->config;
+ struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX];
+
+ return gpiod_get_value(hpd_gpio.gpiod) ?
+ connector_status_connected :
+ connector_status_disconnected;
+}
+
+enum drm_connector_status msm_hdmi_bridge_detect(
+ struct drm_bridge *bridge)
+{
+ struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
+ struct hdmi *hdmi = hdmi_bridge->hdmi;
+ const struct hdmi_platform_config *config = hdmi->config;
+ struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX];
+ enum drm_connector_status stat_gpio, stat_reg;
+ int retry = 20;
+
+ /*
+ * some platforms may not have hpd gpio. Rely only on the status
+ * provided by REG_HDMI_HPD_INT_STATUS in this case.
+ */
+ if (!hpd_gpio.gpiod)
+ return detect_reg(hdmi);
+
+ do {
+ stat_gpio = detect_gpio(hdmi);
+ stat_reg = detect_reg(hdmi);
+
+ if (stat_gpio == stat_reg)
+ break;
+
+ mdelay(10);
+ } while (--retry);
+
+ /* the status we get from reading gpio seems to be more reliable,
+ * so trust that one the most if we didn't manage to get hdmi and
+ * gpio status to agree:
+ */
+ if (stat_gpio != stat_reg) {
+ DBG("HDMI_HPD_INT_STATUS tells us: %d", stat_reg);
+ DBG("hpd gpio tells us: %d", stat_gpio);
+ }
+
+ return stat_gpio;
+}
projects / linux.git / commitdiff