Add a CEC driver for the dw-hdmi hardware using Hans Verkil's CEC
implementation.

Signed-off-by: Russell King <rmk+kernel at armlinux.org.uk>
---
 drivers/gpu/drm/bridge/Kconfig            |   7 +
 drivers/gpu/drm/bridge/Makefile           |   1 +
 drivers/gpu/drm/bridge/dw-hdmi-cec.c      | 344 ++++++++++++++++++++++++++++++
 drivers/gpu/drm/bridge/dw-hdmi.c          |  64 +++++-
 include/linux/platform_data/dw_hdmi-cec.h |  16 ++
 5 files changed, 421 insertions(+), 11 deletions(-)
 create mode 100644 drivers/gpu/drm/bridge/dw-hdmi-cec.c
 create mode 100644 include/linux/platform_data/dw_hdmi-cec.h

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 6d97d9f2b164..3ad19d16f4ca 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -33,6 +33,13 @@ config DRM_DW_HDMI_AHB_AUDIO
          Designware HDMI block.  This is used in conjunction with
          the i.MX6 HDMI driver.

+config DRM_DW_HDMI_CEC
+       tristate "Synopsis Designware CEC interface"
+       depends on DRM_DW_HDMI && MEDIA_CEC
+       help
+         Support the CE interface which is part of the Synopsis
+         Designware HDMI block.
+
 config DRM_NXP_PTN3460
        tristate "NXP PTN3460 DP/LVDS bridge"
        depends on OF
diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
index 96b13b30e6ab..4869441d35f4 100644
--- a/drivers/gpu/drm/bridge/Makefile
+++ b/drivers/gpu/drm/bridge/Makefile
@@ -3,6 +3,7 @@ ccflags-y := -Iinclude/drm
 obj-$(CONFIG_DRM_ANALOGIX_ANX78XX) += analogix-anx78xx.o
 obj-$(CONFIG_DRM_DW_HDMI) += dw-hdmi.o
 obj-$(CONFIG_DRM_DW_HDMI_AHB_AUDIO) += dw-hdmi-ahb-audio.o
+obj-$(CONFIG_DRM_DW_HDMI_CEC) += dw-hdmi-cec.o
 obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o
 obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
 obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix/
diff --git a/drivers/gpu/drm/bridge/dw-hdmi-cec.c 
b/drivers/gpu/drm/bridge/dw-hdmi-cec.c
new file mode 100644
index 000000000000..9d6b8daa584d
--- /dev/null
+++ b/drivers/gpu/drm/bridge/dw-hdmi-cec.c
@@ -0,0 +1,344 @@
+/* http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/
+ * tree/drivers/mxc/hdmi-cec/mxc_hdmi-cec.c?h=imx_3.0.35_4.1.0 */
+#include <linux/hdmi-notifier.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/platform_data/dw_hdmi-cec.h>
+#include <linux/platform_device.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+#include <drm/drm_edid.h>
+
+#include <media/cec.h>
+#include <media/cec-edid.h>
+
+#define DEV_NAME "mxc_hdmi_cec"
+
+enum {
+       HDMI_IH_CEC_STAT0       = 0x0106,
+       HDMI_IH_MUTE_CEC_STAT0  = 0x0186,
+
+       HDMI_CEC_CTRL           = 0x7d00,
+       CEC_CTRL_START          = BIT(0),
+       CEC_CTRL_NORMAL         = 1 << 1,
+
+       HDMI_CEC_STAT           = 0x7d01,
+       CEC_STAT_DONE           = BIT(0),
+       CEC_STAT_EOM            = BIT(1),
+       CEC_STAT_NACK           = BIT(2),
+       CEC_STAT_ARBLOST        = BIT(3),
+       CEC_STAT_ERROR_INIT     = BIT(4),
+       CEC_STAT_ERROR_FOLL     = BIT(5),
+       CEC_STAT_WAKEUP         = BIT(6),
+
+       HDMI_CEC_MASK           = 0x7d02,
+       HDMI_CEC_POLARITY       = 0x7d03,
+       HDMI_CEC_INT            = 0x7d04,
+       HDMI_CEC_ADDR_L         = 0x7d05,
+       HDMI_CEC_ADDR_H         = 0x7d06,
+       HDMI_CEC_TX_CNT         = 0x7d07,
+       HDMI_CEC_RX_CNT         = 0x7d08,
+       HDMI_CEC_TX_DATA0       = 0x7d10,
+       HDMI_CEC_RX_DATA0       = 0x7d20,
+       HDMI_CEC_LOCK           = 0x7d30,
+       HDMI_CEC_WKUPCTRL       = 0x7d31,
+};
+
+struct dw_hdmi_cec {
+       void __iomem *base;
+       u32 addresses;
+       struct cec_adapter *adap;
+       struct cec_msg rx_msg;
+       unsigned int tx_status;
+       bool tx_done;
+       bool rx_done;
+       const struct dw_hdmi_cec_ops *ops;
+       void *ops_data;
+       int retries;
+       int irq;
+       struct notifier_block nb;
+};
+
+static int dw_hdmi_cec_log_addr(struct cec_adapter *adap, u8 logical_addr)
+{
+       struct dw_hdmi_cec *cec = adap->priv;
+       u32 addresses;
+
+       if (logical_addr == CEC_LOG_ADDR_INVALID)
+               addresses = cec->addresses = BIT(15);
+       else
+               addresses = cec->addresses |= BIT(logical_addr);
+
+       writeb_relaxed(addresses & 255, cec->base + HDMI_CEC_ADDR_L);
+       writeb_relaxed(addresses >> 8, cec->base + HDMI_CEC_ADDR_H);
+
+       return 0;
+}
+
+static int dw_hdmi_cec_transmit(struct cec_adapter *adap, u8 attempts,
+                               u32 signal_free_time, struct cec_msg *msg)
+{
+       struct dw_hdmi_cec *cec = adap->priv;
+       unsigned i;
+
+       cec->retries = attempts;
+
+       for (i = 0; i < msg->len; i++)
+               writeb_relaxed(msg->msg[i], cec->base + HDMI_CEC_TX_DATA0 + i);
+
+       writeb_relaxed(msg->len, cec->base + HDMI_CEC_TX_CNT);
+       writeb_relaxed(CEC_CTRL_NORMAL | CEC_CTRL_START, cec->base + 
HDMI_CEC_CTRL);
+
+       return 0;
+}
+
+static irqreturn_t dw_hdmi_cec_hardirq(int irq, void *data)
+{
+       struct cec_adapter *adap = data;
+       struct dw_hdmi_cec *cec = adap->priv;
+       unsigned stat = readb_relaxed(cec->base + HDMI_IH_CEC_STAT0);
+       irqreturn_t ret = IRQ_HANDLED;
+
+       if (stat == 0)
+               return IRQ_NONE;
+
+       writeb_relaxed(stat, cec->base + HDMI_IH_CEC_STAT0);
+
+       if (stat & CEC_STAT_ERROR_INIT) {
+               if (cec->retries) {
+                       unsigned v = readb_relaxed(cec->base + HDMI_CEC_CTRL);
+                       writeb_relaxed(v | CEC_CTRL_START, cec->base + 
HDMI_CEC_CTRL);
+                       cec->retries -= 1;
+               } else {
+                       cec->tx_status = CEC_TX_STATUS_MAX_RETRIES;
+                       cec->tx_done = true;
+                       ret = IRQ_WAKE_THREAD;
+               }
+       } else if (stat & CEC_STAT_DONE) {
+               cec->tx_status = CEC_TX_STATUS_OK;
+               cec->tx_done = true;
+               ret = IRQ_WAKE_THREAD;
+       } else if (stat & CEC_STAT_NACK) {
+               cec->tx_status = CEC_TX_STATUS_NACK;
+               cec->tx_done = true;
+               ret = IRQ_WAKE_THREAD;
+       }
+
+       if (stat & CEC_STAT_EOM) {
+               unsigned len, i;
+               void *base = cec->base;
+
+               len = readb_relaxed(base + HDMI_CEC_RX_CNT);
+               if (len > sizeof(cec->rx_msg.msg))
+                       len = sizeof(cec->rx_msg.msg);
+
+               for (i = 0; i < len; i++)
+                       cec->rx_msg.msg[i] =
+                               readb_relaxed(base + HDMI_CEC_RX_DATA0 + i);
+
+               writeb_relaxed(0, base + HDMI_CEC_LOCK);
+
+               cec->rx_msg.len = len;
+               smp_wmb();
+               cec->rx_done = true;
+
+               ret = IRQ_WAKE_THREAD;
+       }
+
+       return ret;
+}
+
+static irqreturn_t dw_hdmi_cec_thread(int irq, void *data)
+{
+       struct cec_adapter *adap = data;
+       struct dw_hdmi_cec *cec = adap->priv;
+
+       if (cec->tx_done) {
+               cec->tx_done = false;
+               cec_transmit_done(adap, cec->tx_status, 0, 0, 0, 0);
+       }
+       if (cec->rx_done) {
+               cec->rx_done = false;
+               smp_rmb();
+               cec_received_msg(adap, &cec->rx_msg);
+       }
+       return IRQ_HANDLED;
+}
+
+static int dw_hdmi_cec_enable(struct cec_adapter *adap, bool enable)
+{
+       struct dw_hdmi_cec *cec = adap->priv;
+
+       if (!enable) {
+               writeb_relaxed(~0, cec->base + HDMI_CEC_MASK);
+               writeb_relaxed(~0, cec->base + HDMI_IH_MUTE_CEC_STAT0);
+               writeb_relaxed(0, cec->base + HDMI_CEC_POLARITY);
+
+               cec->ops->disable(cec->ops_data);
+       } else {
+               unsigned irqs;
+
+               writeb_relaxed(0, cec->base + HDMI_CEC_CTRL);
+               writeb_relaxed(~0, cec->base + HDMI_IH_CEC_STAT0);
+               writeb_relaxed(0, cec->base + HDMI_CEC_LOCK);
+
+               dw_hdmi_cec_log_addr(cec->adap, CEC_LOG_ADDR_INVALID);
+
+               cec->ops->enable(cec->ops_data);
+
+               irqs = CEC_STAT_ERROR_INIT | CEC_STAT_NACK | CEC_STAT_EOM |
+                      CEC_STAT_DONE;
+               writeb_relaxed(irqs, cec->base + HDMI_CEC_POLARITY);
+               writeb_relaxed(~irqs, cec->base + HDMI_CEC_MASK);
+               writeb_relaxed(~irqs, cec->base + HDMI_IH_MUTE_CEC_STAT0);
+       }
+       return 0;
+}
+
+static const struct cec_adap_ops dw_hdmi_cec_ops = {
+       .adap_enable = dw_hdmi_cec_enable,
+       .adap_log_addr = dw_hdmi_cec_log_addr,
+       .adap_transmit = dw_hdmi_cec_transmit,
+};
+
+static unsigned int parse_hdmi_addr(const struct edid *edid)
+{
+       if (!edid || edid->extensions == 0)
+               return (u16)~0;
+
+       return cec_get_edid_phys_addr((u8 *)edid,
+                               EDID_LENGTH * (edid->extensions + 1), NULL);
+}
+
+static int dw_hdmi_cec_notify(struct notifier_block *nb, unsigned long event,
+                             void *data)
+{
+       struct dw_hdmi_cec *cec = container_of(nb, struct dw_hdmi_cec, nb);
+       union hdmi_event *event_block = data;
+       unsigned int phys;
+
+       dev_info(event_block->base.source, "event %lu\n", event);
+
+       if (event_block->base.source != cec->adap->devnode.parent)
+               return NOTIFY_OK;
+
+       switch (event) {
+       case HDMI_CONNECTED:
+               break;
+
+       case HDMI_DISCONNECTED:
+               cec_s_phys_addr(cec->adap, CEC_PHYS_ADDR_INVALID, false);
+               break;
+
+       case HDMI_NEW_EDID:
+               phys = parse_hdmi_addr(event_block->edid.edid);
+               cec_s_phys_addr(cec->adap, phys, false);
+               break;
+       }
+
+       return NOTIFY_OK;
+}
+
+static void dw_hdmi_cec_del(void *data)
+{
+       struct dw_hdmi_cec *cec = data;
+
+       cec_delete_adapter(cec->adap);
+}
+
+static int dw_hdmi_cec_probe(struct platform_device *pdev)
+{
+       struct dw_hdmi_cec_data *data = dev_get_platdata(&pdev->dev);
+       struct dw_hdmi_cec *cec;
+       int ret;
+
+       if (!data)
+               return -ENXIO;
+
+       /*
+        * Our device is just a convenience - we want to link to the real
+        * hardware device here, so that userspace can see the association
+        * between the HDMI hardware and its associated CEC chardev.
+        */
+       cec = devm_kzalloc(&pdev->dev, sizeof(*cec), GFP_KERNEL);
+       if (!cec)
+               return -ENOMEM;
+
+       cec->base = data->base;
+       cec->irq = data->irq;
+       cec->ops = data->ops;
+       cec->ops_data = data->ops_data;
+       cec->nb.notifier_call = dw_hdmi_cec_notify;
+
+       platform_set_drvdata(pdev, cec);
+
+       writeb_relaxed(0, cec->base + HDMI_CEC_TX_CNT);
+       writeb_relaxed(~0, cec->base + HDMI_CEC_MASK);
+       writeb_relaxed(~0, cec->base + HDMI_IH_MUTE_CEC_STAT0);
+       writeb_relaxed(0, cec->base + HDMI_CEC_POLARITY);
+
+       cec->adap = cec_allocate_adapter(&dw_hdmi_cec_ops, cec, "dw_hdmi",
+                                        CEC_CAP_LOG_ADDRS | CEC_CAP_TRANSMIT |
+                                        CEC_CAP_RC, CEC_MAX_LOG_ADDRS,
+                                        pdev->dev.parent);
+       if (IS_ERR(cec->adap))
+               return PTR_ERR(cec->adap);
+
+       /* override the module pointer */
+       cec->adap->owner = THIS_MODULE;
+
+       ret = devm_add_action(&pdev->dev, dw_hdmi_cec_del, cec);
+       if (ret) {
+               cec_delete_adapter(cec->adap);
+               return ret;
+       }
+
+       ret = devm_request_threaded_irq(&pdev->dev, cec->irq,
+                                       dw_hdmi_cec_hardirq,
+                                       dw_hdmi_cec_thread, IRQF_SHARED,
+                                       DEV_NAME, cec->adap);
+       if (ret < 0)
+               return ret;
+
+       ret = cec_register_adapter(cec->adap);
+       if (ret < 0)
+               return ret;
+
+       /*
+        * CEC documentation says we must not call cec_delete_adapter
+        * after a successful call to cec_register_adapter().
+        */
+       devm_remove_action(&pdev->dev, dw_hdmi_cec_del, cec);
+
+       hdmi_register_notifier(&cec->nb);
+
+       return 0;
+}
+
+static int dw_hdmi_cec_remove(struct platform_device *pdev)
+{
+       struct dw_hdmi_cec *cec = platform_get_drvdata(pdev);
+
+       hdmi_unregister_notifier(&cec->nb);
+       cec_unregister_adapter(cec->adap);
+
+       return 0;
+}
+
+static struct platform_driver dw_hdmi_cec_driver = {
+       .probe  = dw_hdmi_cec_probe,
+       .remove = dw_hdmi_cec_remove,
+       .driver = {
+               .name = "dw-hdmi-cec",
+               .owner = THIS_MODULE,
+       },
+};
+module_platform_driver(dw_hdmi_cec_driver);
+
+MODULE_AUTHOR("Russell King <rmk+kernel at arm.linux.org.uk>");
+MODULE_DESCRIPTION("Synopsis Designware HDMI CEC driver for i.MX");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS(PLATFORM_MODULE_PREFIX "dw-hdmi-cec");
diff --git a/drivers/gpu/drm/bridge/dw-hdmi.c b/drivers/gpu/drm/bridge/dw-hdmi.c
index cb6e03efbebf..1ad58e37c0b3 100644
--- a/drivers/gpu/drm/bridge/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/dw-hdmi.c
@@ -19,6 +19,7 @@
 #include <linux/hdmi-notifier.h>
 #include <linux/mutex.h>
 #include <linux/of_device.h>
+#include <linux/platform_data/dw_hdmi-cec.h>
 #include <linux/spinlock.h>

 #include <drm/drm_of.h>
@@ -108,6 +109,7 @@ struct dw_hdmi {
        struct drm_bridge *bridge;

        struct platform_device *audio;
+       struct platform_device *cec;
        enum dw_hdmi_devtype dev_type;
        struct device *dev;
        struct clk *isfr_clk;
@@ -119,6 +121,7 @@ struct dw_hdmi {
        int vic;

        u8 edid[HDMI_EDID_LEN];
+       u8 mc_clkdis;
        bool cable_plugin;

        bool phy_enabled;
@@ -1108,8 +1111,6 @@ static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi)
 /* HDMI Initialization Step B.4 */
 static void dw_hdmi_enable_video_path(struct dw_hdmi *hdmi)
 {
-       u8 clkdis;
-
        /* control period minimum duration */
        hdmi_writeb(hdmi, 12, HDMI_FC_CTRLDUR);
        hdmi_writeb(hdmi, 32, HDMI_FC_EXCTRLDUR);
@@ -1121,23 +1122,28 @@ static void dw_hdmi_enable_video_path(struct dw_hdmi 
*hdmi)
        hdmi_writeb(hdmi, 0x21, HDMI_FC_CH2PREAM);

        /* Enable pixel clock and tmds data path */
-       clkdis = 0x7F;
-       clkdis &= ~HDMI_MC_CLKDIS_PIXELCLK_DISABLE;
-       hdmi_writeb(hdmi, clkdis, HDMI_MC_CLKDIS);
+       hdmi->mc_clkdis |= HDMI_MC_CLKDIS_HDCPCLK_DISABLE |
+                          HDMI_MC_CLKDIS_CSCCLK_DISABLE |
+                          HDMI_MC_CLKDIS_AUDCLK_DISABLE |
+                          HDMI_MC_CLKDIS_PREPCLK_DISABLE |
+                          HDMI_MC_CLKDIS_TMDSCLK_DISABLE;
+       hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_PIXELCLK_DISABLE;
+       hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);

-       clkdis &= ~HDMI_MC_CLKDIS_TMDSCLK_DISABLE;
-       hdmi_writeb(hdmi, clkdis, HDMI_MC_CLKDIS);
+       hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_TMDSCLK_DISABLE;
+       hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);

        /* Enable csc path */
        if (is_color_space_conversion(hdmi)) {
-               clkdis &= ~HDMI_MC_CLKDIS_CSCCLK_DISABLE;
-               hdmi_writeb(hdmi, clkdis, HDMI_MC_CLKDIS);
+               hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_CSCCLK_DISABLE;
+               hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
        }
 }

 static void hdmi_enable_audio_clk(struct dw_hdmi *hdmi)
 {
-       hdmi_modb(hdmi, 0, HDMI_MC_CLKDIS_AUDCLK_DISABLE, HDMI_MC_CLKDIS);
+       hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_AUDCLK_DISABLE;
+       hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
 }

 /* Workaround to clear the overflow condition */
@@ -1297,7 +1303,6 @@ static void initialize_hdmi_ih_mutes(struct dw_hdmi *hdmi)
        hdmi_writeb(hdmi, 0xff, HDMI_AUD_HBR_MASK);
        hdmi_writeb(hdmi, 0xff, HDMI_GP_MASK);
        hdmi_writeb(hdmi, 0xff, HDMI_A_APIINTMSK);
-       hdmi_writeb(hdmi, 0xff, HDMI_CEC_MASK);
        hdmi_writeb(hdmi, 0xff, HDMI_I2CM_INT);
        hdmi_writeb(hdmi, 0xff, HDMI_I2CM_CTLINT);

@@ -1666,6 +1671,27 @@ static int dw_hdmi_register(struct drm_device *drm, 
struct dw_hdmi *hdmi)
        return 0;
 }

+static void dw_hdmi_cec_enable(void *data)
+{
+       struct dw_hdmi *hdmi = data;
+
+       hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_CECCLK_DISABLE;
+       hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
+}
+
+static void dw_hdmi_cec_disable(void *data)
+{
+       struct dw_hdmi *hdmi = data;
+
+       hdmi->mc_clkdis |= HDMI_MC_CLKDIS_CECCLK_DISABLE;
+       hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
+}
+
+static const struct dw_hdmi_cec_ops dw_hdmi_cec_ops = {
+       .enable = dw_hdmi_cec_enable,
+       .disable = dw_hdmi_cec_disable,
+};
+
 int dw_hdmi_bind(struct device *dev, struct device *master,
                 void *data, struct drm_encoder *encoder,
                 struct resource *iores, int irq,
@@ -1676,6 +1702,7 @@ int dw_hdmi_bind(struct device *dev, struct device 
*master,
        struct platform_device_info pdevinfo;
        struct device_node *ddc_node;
        struct dw_hdmi_audio_data audio;
+       struct dw_hdmi_cec_data cec;
        struct dw_hdmi *hdmi;
        int ret;
        u32 val = 1;
@@ -1694,6 +1721,7 @@ int dw_hdmi_bind(struct device *dev, struct device 
*master,
        hdmi->disabled = true;
        hdmi->rxsense = true;
        hdmi->phy_mask = (u8)~(HDMI_PHY_HPD | HDMI_PHY_RX_SENSE);
+       hdmi->mc_clkdis = 0x7f;

        mutex_init(&hdmi->mutex);
        mutex_init(&hdmi->audio_mutex);
@@ -1820,6 +1848,18 @@ int dw_hdmi_bind(struct device *dev, struct device 
*master,
                hdmi->audio = platform_device_register_full(&pdevinfo);
        }

+       cec.base = hdmi->regs;
+       cec.irq = irq;
+       cec.ops = &dw_hdmi_cec_ops;
+       cec.ops_data = hdmi;
+
+       pdevinfo.name = "dw-hdmi-cec";
+       pdevinfo.data = &cec;
+       pdevinfo.size_data = sizeof(cec);
+       pdevinfo.dma_mask = 0;
+
+       hdmi->cec = platform_device_register_full(&pdevinfo);
+
        dev_set_drvdata(dev, hdmi);

        return 0;
@@ -1839,6 +1879,8 @@ void dw_hdmi_unbind(struct device *dev, struct device 
*master, void *data)

        if (hdmi->audio && !IS_ERR(hdmi->audio))
                platform_device_unregister(hdmi->audio);
+       if (!IS_ERR(hdmi->cec))
+               platform_device_unregister(hdmi->cec);

        /* Disable all interrupts */
        hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
diff --git a/include/linux/platform_data/dw_hdmi-cec.h 
b/include/linux/platform_data/dw_hdmi-cec.h
new file mode 100644
index 000000000000..5ff40cc237a8
--- /dev/null
+++ b/include/linux/platform_data/dw_hdmi-cec.h
@@ -0,0 +1,16 @@
+#ifndef DW_HDMI_CEC_H
+#define DW_HDMI_CEC_H
+
+struct dw_hdmi_cec_ops {
+       void (*enable)(void *);
+       void (*disable)(void *);
+};
+
+struct dw_hdmi_cec_data {
+       void __iomem *base;
+       int irq;
+       const struct dw_hdmi_cec_ops *ops;
+       void *ops_data;
+};
+
+#endif
-- 
2.1.0

Reply via email to