/*
* Copyright (C) STMicroelectronics SA 2014
* Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics.
* License terms: GNU General Public License (GPL), version 2
*/
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/hdmi.h>
#include <linux/module.h>
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>
#include "sti_hdmi.h"
#include "sti_hdmi_tx3g4c28phy.h"
#include "sti_hdmi_tx3g0c55phy.h"
#include "sti_vtg.h"
#define HDMI_CFG 0x0000
#define HDMI_INT_EN 0x0004
#define HDMI_INT_STA 0x0008
#define HDMI_INT_CLR 0x000C
#define HDMI_STA 0x0010
#define HDMI_ACTIVE_VID_XMIN 0x0100
#define HDMI_ACTIVE_VID_XMAX 0x0104
#define HDMI_ACTIVE_VID_YMIN 0x0108
#define HDMI_ACTIVE_VID_YMAX 0x010C
#define HDMI_DFLT_CHL0_DAT 0x0110
#define HDMI_DFLT_CHL1_DAT 0x0114
#define HDMI_DFLT_CHL2_DAT 0x0118
#define HDMI_SW_DI_1_HEAD_WORD 0x0210
#define HDMI_SW_DI_1_PKT_WORD0 0x0214
#define HDMI_SW_DI_1_PKT_WORD1 0x0218
#define HDMI_SW_DI_1_PKT_WORD2 0x021C
#define HDMI_SW_DI_1_PKT_WORD3 0x0220
#define HDMI_SW_DI_1_PKT_WORD4 0x0224
#define HDMI_SW_DI_1_PKT_WORD5 0x0228
#define HDMI_SW_DI_1_PKT_WORD6 0x022C
#define HDMI_SW_DI_CFG 0x0230
#define HDMI_IFRAME_SLOT_AVI 1
#define XCAT(prefix, x, suffix) prefix ## x ## suffix
#define HDMI_SW_DI_N_HEAD_WORD(x) XCAT(HDMI_SW_DI_, x, _HEAD_WORD)
#define HDMI_SW_DI_N_PKT_WORD0(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD0)
#define HDMI_SW_DI_N_PKT_WORD1(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD1)
#define HDMI_SW_DI_N_PKT_WORD2(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD2)
#define HDMI_SW_DI_N_PKT_WORD3(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD3)
#define HDMI_SW_DI_N_PKT_WORD4(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD4)
#define HDMI_SW_DI_N_PKT_WORD5(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD5)
#define HDMI_SW_DI_N_PKT_WORD6(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD6)
#define HDMI_IFRAME_DISABLED 0x0
#define HDMI_IFRAME_SINGLE_SHOT 0x1
#define HDMI_IFRAME_FIELD 0x2
#define HDMI_IFRAME_FRAME 0x3
#define HDMI_IFRAME_MASK 0x3
#define HDMI_IFRAME_CFG_DI_N(x, n) ((x) << ((n-1)*4)) /* n from 1 to 6 */
#define HDMI_CFG_DEVICE_EN BIT(0)
#define HDMI_CFG_HDMI_NOT_DVI BIT(1)
#define HDMI_CFG_HDCP_EN BIT(2)
#define HDMI_CFG_ESS_NOT_OESS BIT(3)
#define HDMI_CFG_H_SYNC_POL_NEG BIT(4)
#define HDMI_CFG_SINK_TERM_DET_EN BIT(5)
#define HDMI_CFG_V_SYNC_POL_NEG BIT(6)
#define HDMI_CFG_422_EN BIT(8)
#define HDMI_CFG_FIFO_OVERRUN_CLR BIT(12)
#define HDMI_CFG_FIFO_UNDERRUN_CLR BIT(13)
#define HDMI_CFG_SW_RST_EN BIT(31)
#define HDMI_INT_GLOBAL BIT(0)
#define HDMI_INT_SW_RST BIT(1)
#define HDMI_INT_PIX_CAP BIT(3)
#define HDMI_INT_HOT_PLUG BIT(4)
#define HDMI_INT_DLL_LCK BIT(5)
#define HDMI_INT_NEW_FRAME BIT(6)
#define HDMI_INT_GENCTRL_PKT BIT(7)
#define HDMI_INT_SINK_TERM_PRESENT BIT(11)
#define HDMI_DEFAULT_INT (HDMI_INT_SINK_TERM_PRESENT \
| HDMI_INT_DLL_LCK \
| HDMI_INT_HOT_PLUG \
| HDMI_INT_GLOBAL)
#define HDMI_WORKING_INT (HDMI_INT_SINK_TERM_PRESENT \
| HDMI_INT_GENCTRL_PKT \
| HDMI_INT_NEW_FRAME \
| HDMI_INT_DLL_LCK \
| HDMI_INT_HOT_PLUG \
| HDMI_INT_PIX_CAP \
| HDMI_INT_SW_RST \
| HDMI_INT_GLOBAL)
#define HDMI_STA_SW_RST BIT(1)
struct sti_hdmi_connector {
struct drm_connector drm_connector;
struct drm_encoder *encoder;
struct sti_hdmi *hdmi;
};
#define to_sti_hdmi_connector(x) \
container_of(x, struct sti_hdmi_connector, drm_connector)
u32 hdmi_read(struct sti_hdmi *hdmi, int offset)
{
return readl(hdmi->regs + offset);
}
void hdmi_write(struct sti_hdmi *hdmi, u32 val, int offset)
{
writel(val, hdmi->regs + offset);
}
/**
* HDMI interrupt handler threaded
*
* @irq: irq number
* @arg: connector structure
*/
static irqreturn_t hdmi_irq_thread(int irq, void *arg)
{
struct sti_hdmi *hdmi = arg;
/* Hot plug/unplug IRQ */
if (hdmi->irq_status & HDMI_INT_HOT_PLUG) {
/* read gpio to get the status */
hdmi->hpd = gpio_get_value(hdmi->hpd_gpio);
if (hdmi->drm_dev)
drm_helper_hpd_irq_event(hdmi->drm_dev);
}
/* Sw reset and PLL lock are exclusive so we can use the same
* event to signal them
*/
if (hdmi->irq_status & (HDMI_INT_SW_RST | HDMI_INT_DLL_LCK)) {
hdmi->event_received = true;
wake_up_interruptible(&hdmi->wait_event);
}
return IRQ_HANDLED;
}
/**
* HDMI interrupt handler
*
* @irq: irq number
* @arg: connector structure
*/
static irqreturn_t hdmi_irq(int irq, void *arg)
{
struct sti_hdmi *hdmi = arg;
/* read interrupt status */
hdmi->irq_status = hdmi_read(hdmi, HDMI_INT_STA);
/* clear interrupt status */
hdmi_write(hdmi, hdmi->irq_status, HDMI_INT_CLR);
/* force sync bus write */
hdmi_read(hdmi, HDMI_INT_STA);
return IRQ_WAKE_THREAD;
}
/**
* Set hdmi active area depending on the drm display mode selected
*
* @hdmi: pointer on the hdmi internal structure
*/
static void hdmi_active_area(struct sti_hdmi *hdmi)
{
u32 xmin, xmax;
u32 ymin, ymax;
xmin = sti_vtg_get_pixel_number(hdmi->mode, 0);
xmax = sti_vtg_get_pixel_number(hdmi->mode, hdmi->mode.hdisplay - 1);
ymin = sti_vtg_get_line_number(hdmi->mode, 0);
ymax = sti_vtg_get_line_number(hdmi->mode, hdmi->mode.vdisplay - 1);
hdmi_write(hdmi, xmin, HDMI_ACTIVE_VID_XMIN);
hdmi_write(hdmi, xmax, HDMI_ACTIVE_VID_XMAX);
hdmi_write(hdmi, ymin, HDMI_ACTIVE_VID_YMIN);
hdmi_write(hdmi, ymax, HDMI_ACTIVE_VID_YMAX);
}
/**
* Overall hdmi configuration
*
* @hdmi: pointer on the hdmi internal structure
*/
static void hdmi_config(struct sti_hdmi *hdmi)
{
u32 conf;
DRM_DEBUG_DRIVER("\n");
/* Clear overrun and underrun fifo */
conf = HDMI_CFG_FIFO_OVERRUN_CLR | HDMI_CFG_FIFO_UNDERRUN_CLR;
/* Enable HDMI mode not DVI */
conf |= HDMI_CFG_HDMI_NOT_DVI | HDMI_CFG_ESS_NOT_OESS;
/* Enable sink term detection */
conf |= HDMI_CFG_SINK_TERM_DET_EN;
/* Set Hsync polarity */
if (hdmi->mode.flags & DRM_MODE_FLAG_NHSYNC) {
DRM_DEBUG_DRIVER("H Sync Negative\n");
conf |= HDMI_CFG_H_SYNC_POL_NEG;
}
/* Set Vsync polarity */
if (hdmi->mode.flags & DRM_MODE_FLAG_NVSYNC) {
DRM_DEBUG_DRIVER("V Sync Negative\n");
conf |= HDMI_CFG_V_SYNC_POL_NEG;
}
/* Enable HDMI */
conf |= HDMI_CFG_DEVICE_EN;
hdmi_write(hdmi, conf, HDMI_CFG);
}
/**
* Prepare and configure the AVI infoframe
*
* AVI infoframe are transmitted at least once per two video field and
* contains information about HDMI transmission mode such as color space,
* colorimetry, ...
*
* @hdmi: pointer on the hdmi internal structure
*
* Return negative value if error occurs
*/
static int hdmi_avi_infoframe_config(struct sti_hdmi *hdmi)
{
struct drm_display_mode *mode = &hdmi->mode;
struct hdmi_avi_infoframe infoframe;
u8 buffer[HDMI_INFOFRAME_SIZE(AVI)];
u8 *frame = buffer + HDMI_INFOFRAME_HEADER_SIZE;
u32 val;
int ret;
DRM_DEBUG_DRIVER("\n");
ret = drm_hdmi_avi_infoframe_from_display_mode(&infoframe, mode);
if (ret < 0) {
DRM_ERROR("failed to setup AVI infoframe: %d\n", ret);
return ret;
}
/* fixed infoframe configuration not linked to the mode */
infoframe.colorspace = HDMI_COLORSPACE_RGB;
infoframe.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
infoframe.colorimetry = HDMI_COLORIMETRY_NONE;
ret = hdmi_avi_infoframe_pack(&infoframe, buffer, sizeof(buffer));
if (ret < 0) {
DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
return ret;
}
/* Disable transmission slot for AVI infoframe */
val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, HDMI_IFRAME_SLOT_AVI);
hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
/* Infoframe header */
val = buffer[0x0];
val |= buffer[0x1] << 8;
val |= buffer[0x2] << 16;
hdmi_write(hdmi, val, HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI));
/* Infoframe packet bytes */
val = frame[0x0];
val |= frame[0x1] << 8;
val |= frame[0x2] << 16;
val |= frame[0x3] << 24;
hdmi_write(hdmi, val, HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI));
val = frame[0x4];
val |= frame[0x5] << 8;
val |= frame[0x6] << 16;
val |= frame[0x7] << 24;
hdmi_write(hdmi, val, HDMI_SW_DI_N_PKT_WORD1(HDMI_IFRAME_SLOT_AVI));
val = frame[0x8];
val |= frame[0x9] << 8;
val |= frame[0xA] << 16;
val |= frame[0xB] << 24;
hdmi_write(hdmi, val, HDMI_SW_DI_N_PKT_WORD2(HDMI_IFRAME_SLOT_AVI));
val = frame[0xC];
hdmi_write(hdmi, val, HDMI_SW_DI_N_PKT_WORD3(HDMI_IFRAME_SLOT_AVI));
/* Enable transmission slot for AVI infoframe
* According to the hdmi specification, AVI infoframe should be
* transmitted at least once per two video fields
*/
val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
val |= HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_FIELD, HDMI_IFRAME_SLOT_AVI);
hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
return 0;
}
/**
* Software reset of the hdmi subsystem
*
* @hdmi: pointer on the hdmi internal structure
*
*/
#define HDMI_TIMEOUT_SWRESET 100 /*milliseconds */
static void hdmi_swreset(struct sti_hdmi *hdmi)
{
u32 val;
DRM_DEBUG_DRIVER("\n");
/* Enable hdmi_audio clock only during hdmi reset */
if (clk_prepare_enable(hdmi->clk_audio))
DRM_INFO("Failed to prepare/enable hdmi_audio clk\n");
/* Sw reset */
hdmi->event_received = false;
val = hdmi_read(hdmi, HDMI_CFG);
val |= HDMI_CFG_SW_RST_EN;
hdmi_write(hdmi, val, HDMI_CFG);
/* Wait reset completed */
wait_event_interruptible_timeout(hdmi->wait_event,
hdmi->event_received == true,
msecs_to_jiffies
(HDMI_TIMEOUT_SWRESET));
/*
* HDMI_STA_SW_RST bit is set to '1' when SW_RST bit in HDMI_CFG is
* set to '1' and clk_audio is running.
*/
if ((hdmi_read(hdmi, HDMI_STA) & HDMI_STA_SW_RST) == 0)
DRM_DEBUG_DRIVER("Warning: HDMI sw reset timeout occurs\n");
val = hdmi_read(hdmi, HDMI_CFG);
val &= ~HDMI_CFG_SW_RST_EN;
hdmi_write(hdmi, val, HDMI_CFG);
/* Disable hdmi_audio clock. Not used anymore for drm purpose */
clk_disable_unprepare(hdmi->clk_audio);
}
static void sti_hdmi_disable(struct drm_bridge *bridge)
{
struct sti_hdmi *hdmi = bridge->driver_private;
u32 val = hdmi_read(hdmi, HDMI_CFG);
if (!hdmi->enabled)
return;
DRM_DEBUG_DRIVER("\n");
/* Disable HDMI */
val &= ~HDMI_CFG_DEVICE_EN;
hdmi_write(hdmi, val, HDMI_CFG);
hdmi_write(hdmi, 0xffffffff, HDMI_INT_CLR);
/* Stop the phy */
hdmi->phy_ops->stop(hdmi);
/* Set the default channel data to be a dark red */
hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL0_DAT);
hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL1_DAT);
hdmi_write(hdmi, 0x0060, HDMI_DFLT_CHL2_DAT);
/* Disable/unprepare hdmi clock */
clk_disable_unprepare(hdmi->clk_phy);
clk_disable_unprepare(hdmi->clk_tmds);
clk_disable_unprepare(hdmi->clk_pix);
hdmi->enabled = false;
}
static void sti_hdmi_pre_enable(struct drm_bridge *bridge)
{
struct sti_hdmi *hdmi = bridge->driver_private;
DRM_DEBUG_DRIVER("\n");
if (hdmi->enabled)
return;
/* Prepare/enable clocks */
if (clk_prepare_enable(hdmi->clk_pix))
DRM_ERROR("Failed to prepare/enable hdmi_pix clk\n");
if (clk_prepare_enable(hdmi->clk_tmds))
DRM_ERROR("Failed to prepare/enable hdmi_tmds clk\n");
if (clk_prepare_enable(hdmi->clk_phy))
DRM_ERROR("Failed to prepare/enable hdmi_rejec_pll clk\n");
hdmi->enabled = true;
/* Program hdmi serializer and start phy */
if (!hdmi->phy_ops->start(hdmi)) {
DRM_ERROR("Unable to start hdmi phy\n");
return;
}
/* Program hdmi active area */
hdmi_active_area(hdmi);
/* Enable working interrupts */
hdmi_write(hdmi, HDMI_WORKING_INT, HDMI_INT_EN);
/* Program hdmi config */
hdmi_config(hdmi);
/* Program AVI infoframe */
if (hdmi_avi_infoframe_config(hdmi))
DRM_ERROR("Unable to configure AVI infoframe\n");
/* Sw reset */
hdmi_swreset(hdmi);
}
static void sti_hdmi_set_mode(struct drm_bridge *bridge,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct sti_hdmi *hdmi = bridge->driver_private;
int ret;
DRM_DEBUG_DRIVER("\n");
/* Copy the drm display mode in the connector local structure */
memcpy(&hdmi->mode, mode, sizeof(struct drm_display_mode));
/* Update clock framerate according to the selected mode */
ret = clk_set_rate(hdmi->clk_pix, mode->clock * 1000);
if (ret < 0) {
DRM_ERROR("Cannot set rate (%dHz) for hdmi_pix clk\n",
mode->clock * 1000);
return;
}
ret = clk_set_rate(hdmi->clk_phy, mode->clock * 1000);
if (ret < 0) {
DRM_ERROR("Cannot set rate (%dHz) for hdmi_rejection_pll clk\n",
mode->clock * 1000);
return;
}
}
static void sti_hdmi_bridge_nope(struct drm_bridge *bridge)
{
/* do nothing */
}
static void sti_hdmi_brigde_destroy(struct drm_bridge *bridge)
{
drm_bridge_cleanup(bridge);
kfree(bridge);
}
static const struct drm_bridge_funcs sti_hdmi_bridge_funcs = {
.pre_enable = sti_hdmi_pre_enable,
.enable = sti_hdmi_bridge_nope,
.disable = sti_hdmi_disable,
.post_disable = sti_hdmi_bridge_nope,
.mode_set = sti_hdmi_set_mode,
.destroy = sti_hdmi_brigde_destroy,
};
static int sti_hdmi_connector_get_modes(struct drm_connector *connector)
{
struct i2c_adapter *i2c_adap;
struct edid *edid;
int count;
DRM_DEBUG_DRIVER("\n");
i2c_adap = i2c_get_adapter(1);
if (!i2c_adap)
goto fail;
edid = drm_get_edid(connector, i2c_adap);
if (!edid)
goto fail;
count = drm_add_edid_modes(connector, edid);
drm_mode_connector_update_edid_property(connector, edid);
kfree(edid);
return count;
fail:
DRM_ERROR("Can not read HDMI EDID\n");
return 0;
}
#define CLK_TOLERANCE_HZ 50
static int sti_hdmi_connector_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
int target = mode->clock * 1000;
int target_min = target - CLK_TOLERANCE_HZ;
int target_max = target + CLK_TOLERANCE_HZ;
int result;
struct sti_hdmi_connector *hdmi_connector
= to_sti_hdmi_connector(connector);
struct sti_hdmi *hdmi = hdmi_connector->hdmi;
result = clk_round_rate(hdmi->clk_pix, target);
DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n",
target, result);
if ((result < target_min) || (result > target_max)) {
DRM_DEBUG_DRIVER("hdmi pixclk=%d not supported\n", target);
return MODE_BAD;
}
return MODE_OK;
}
struct drm_encoder *sti_hdmi_best_encoder(struct drm_connector *connector)
{
struct sti_hdmi_connector *hdmi_connector
= to_sti_hdmi_connector(connector);
/* Best encoder is the one associated during connector creation */
return hdmi_connector->encoder;
}
static struct drm_connector_helper_funcs sti_hdmi_connector_helper_funcs = {
.get_modes = sti_hdmi_connector_get_modes,
.mode_valid = sti_hdmi_connector_mode_valid,
.best_encoder = sti_hdmi_best_encoder,
};
/* get detection status of display device */
static enum drm_connector_status
sti_hdmi_connector_detect(struct drm_connector *connector, bool force)
{
struct sti_hdmi_connector *hdmi_connector
= to_sti_hdmi_connector(connector);
struct sti_hdmi *hdmi = hdmi_connector->hdmi;
DRM_DEBUG_DRIVER("\n");
if (hdmi->hpd) {
DRM_DEBUG_DRIVER("hdmi cable connected\n");
return connector_status_connected;
}
DRM_DEBUG_DRIVER("hdmi cable disconnected\n");
return connector_status_disconnected;
}
static void sti_hdmi_connector_destroy(struct drm_connector *connector)
{
struct sti_hdmi_connector *hdmi_connector
= to_sti_hdmi_connector(connector);
drm_connector_unregister(connector);
drm_connector_cleanup(connector);
kfree(hdmi_connector);
}
static struct drm_connector_funcs sti_hdmi_connector_funcs = {
.dpms = drm_helper_connector_dpms,
.fill_modes = drm_helper_probe_single_connector_modes,
.detect = sti_hdmi_connector_detect,
.destroy = sti_hdmi_connector_destroy,
};
static struct drm_encoder *sti_hdmi_find_encoder(struct drm_device *dev)
{
struct drm_encoder *encoder;
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
if (encoder->encoder_type == DRM_MODE_ENCODER_TMDS)
return encoder;
}
return NULL;
}
static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
{
struct sti_hdmi *hdmi = dev_get_drvdata(dev);
struct drm_device *drm_dev = data;
struct drm_encoder *encoder;
struct sti_hdmi_connector *connector;
struct drm_connector *drm_connector;
struct drm_bridge *bridge;
struct i2c_adapter *i2c_adap;
int err;
i2c_adap = i2c_get_adapter(1);
if (!i2c_adap)
return -EPROBE_DEFER;
/* Set the drm device handle */
hdmi->drm_dev = drm_dev;
encoder = sti_hdmi_find_encoder(drm_dev);
if (!encoder)
return -ENOMEM;
connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
if (!connector)
return -ENOMEM;
connector->hdmi = hdmi;
bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL);
if (!bridge)
return -ENOMEM;
bridge->driver_private = hdmi;
drm_bridge_init(drm_dev, bridge, &sti_hdmi_bridge_funcs);
encoder->bridge = bridge;
connector->encoder = encoder;
drm_connector = (struct drm_connector *)connector;
drm_connector->polled = DRM_CONNECTOR_POLL_HPD;
drm_connector_init(drm_dev, drm_connector,
&sti_hdmi_connector_funcs, DRM_MODE_CONNECTOR_HDMIA);
drm_connector_helper_add(drm_connector,
&sti_hdmi_connector_helper_funcs);
err = drm_connector_register(drm_connector);
if (err)
goto err_connector;
err = drm_mode_connector_attach_encoder(drm_connector, encoder);
if (err) {
DRM_ERROR("Failed to attach a connector to a encoder\n");
goto err_sysfs;
}
/* Enable default interrupts */
hdmi_write(hdmi, HDMI_DEFAULT_INT, HDMI_INT_EN);
return 0;
err_sysfs:
drm_connector_unregister(drm_connector);
err_connector:
drm_bridge_cleanup(bridge);
drm_connector_cleanup(drm_connector);
return -EINVAL;
}
static void sti_hdmi_unbind(struct device *dev,
struct device *master, void *data)
{
/* do nothing */
}
static const struct component_ops sti_hdmi_ops = {
.bind = sti_hdmi_bind,
.unbind = sti_hdmi_unbind,
};
static const struct of_device_id hdmi_of_match[] = {
{
.compatible = "st,stih416-hdmi",
.data = &tx3g0c55phy_ops,
}, {
.compatible = "st,stih407-hdmi",
.data = &tx3g4c28phy_ops,
}, {
/* end node */
}
};
MODULE_DEVICE_TABLE(of, hdmi_of_match);
static int sti_hdmi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct sti_hdmi *hdmi;
struct device_node *np = dev->of_node;
struct resource *res;
int ret;
DRM_INFO("%s\n", __func__);
hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
if (!hdmi)
return -ENOMEM;
hdmi->dev = pdev->dev;
/* Get resources */
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi-reg");
if (!res) {
DRM_ERROR("Invalid hdmi resource\n");
return -ENOMEM;
}
hdmi->regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
if (!hdmi->regs)
return -ENOMEM;
if (of_device_is_compatible(np, "st,stih416-hdmi")) {
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"syscfg");
if (!res) {
DRM_ERROR("Invalid syscfg resource\n");
return -ENOMEM;
}
hdmi->syscfg = devm_ioremap_nocache(dev, res->start,
resource_size(res));
if (!hdmi->syscfg)
return -ENOMEM;
}
hdmi->phy_ops = (struct hdmi_phy_ops *)
of_match_node(hdmi_of_match, np)->data;
/* Get clock resources */
hdmi->clk_pix = devm_clk_get(dev, "pix");
if (IS_ERR(hdmi->clk_pix)) {
DRM_ERROR("Cannot get hdmi_pix clock\n");
return PTR_ERR(hdmi->clk_pix);
}
hdmi->clk_tmds = devm_clk_get(dev, "tmds");
if (IS_ERR(hdmi->clk_tmds)) {
DRM_ERROR("Cannot get hdmi_tmds clock\n");
return PTR_ERR(hdmi->clk_tmds);
}
hdmi->clk_phy = devm_clk_get(dev, "phy");
if (IS_ERR(hdmi->clk_phy)) {
DRM_ERROR("Cannot get hdmi_phy clock\n");
return PTR_ERR(hdmi->clk_phy);
}
hdmi->clk_audio = devm_clk_get(dev, "audio");
if (IS_ERR(hdmi->clk_audio)) {
DRM_ERROR("Cannot get hdmi_audio clock\n");
return PTR_ERR(hdmi->clk_audio);
}
hdmi->hpd_gpio = of_get_named_gpio(np, "hdmi,hpd-gpio", 0);
if (hdmi->hpd_gpio < 0) {
DRM_ERROR("Failed to get hdmi hpd-gpio\n");
return -EIO;
}
hdmi->hpd = gpio_get_value(hdmi->hpd_gpio);
init_waitqueue_head(&hdmi->wait_event);
hdmi->irq = platform_get_irq_byname(pdev, "irq");
ret = devm_request_threaded_irq(dev, hdmi->irq, hdmi_irq,
hdmi_irq_thread, IRQF_ONESHOT, dev_name(dev), hdmi);
if (ret) {
DRM_ERROR("Failed to register HDMI interrupt\n");
return ret;
}
hdmi->reset = devm_reset_control_get(dev, "hdmi");
/* Take hdmi out of reset */
if (!IS_ERR(hdmi->reset))
reset_control_deassert(hdmi->reset);
platform_set_drvdata(pdev, hdmi);
return component_add(&pdev->dev, &sti_hdmi_ops);
}
static int sti_hdmi_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &sti_hdmi_ops);
return 0;
}
struct platform_driver sti_hdmi_driver = {
.driver = {
.name = "sti-hdmi",
.owner = THIS_MODULE,
.of_match_table = hdmi_of_match,
},
.probe = sti_hdmi_probe,
.remove = sti_hdmi_remove,
};
module_platform_driver(sti_hdmi_driver);
MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
MODULE_LICENSE("GPL");
