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Subject[PATCH 1/6] drm: bridge/dw_hdmi: add hdmi audio config interfaces
Date
creat dw-hdmi-audio device in probe function, and support
some interfaces to dw-hdmi-audio driver for setting hdmi
audio format.

Signed-off-by: Yakir Yang <ykk@rock-chips.com>
---

drivers/gpu/drm/bridge/dw_hdmi.c | 28 ++++++++++++++++++++++++++++
include/drm/bridge/dw_hdmi.h | 12 ++++++++++++
2 files changed, 40 insertions(+)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 01c95a8..9ba96de 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -106,6 +106,7 @@ struct dw_hdmi {
struct drm_encoder *encoder;
struct drm_bridge *bridge;

+ struct platform_device *audio_pdev;
enum dw_hdmi_devtype dev_type;
struct device *dev;
struct clk *isfr_clk;
@@ -369,6 +370,11 @@ static void hdmi_clk_regenerator_update_pixel_clock(struct dw_hdmi *hdmi)
hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock);
}

+static void hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int sample_rate)
+{
+ hdmi->sample_rate = sample_rate;
+ hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock);
+}
/*
* this submodule is responsible for the video data synchronization.
* for example, for RGB 4:4:4 input, the data map is defined as
@@ -1558,6 +1564,8 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
struct resource *iores, int irq,
const struct dw_hdmi_plat_data *plat_data)
{
+ struct platform_device_info pdevinfo;
+ struct dw_hdmi_audio_data audio;
struct drm_device *drm = data;
struct device_node *np = dev->of_node;
struct device_node *ddc_node;
@@ -1679,6 +1687,23 @@ int dw_hdmi_bind(struct device *dev, struct device *master,

dev_set_drvdata(dev, hdmi);

+ memset(&pdevinfo, 0, sizeof(pdevinfo));
+ pdevinfo.parent = dev;
+ pdevinfo.id = PLATFORM_DEVID_NONE;
+
+ audio.irq = irq;
+ audio.dw = hdmi;
+ audio.mod = hdmi_modb;
+ audio.read = hdmi_readb;
+ audio.write = hdmi_writeb;
+ audio.set_sample_rate = hdmi_set_sample_rate;
+
+ pdevinfo.name = "dw-hdmi-audio";
+ pdevinfo.data = &audio;
+ pdevinfo.size_data = sizeof(audio);
+ pdevinfo.dma_mask = DMA_BIT_MASK(32);
+ hdmi->audio_pdev = platform_device_register_full(&pdevinfo);
+
return 0;

err_iahb:
@@ -1694,6 +1719,9 @@ void dw_hdmi_unbind(struct device *dev, struct device *master, void *data)
{
struct dw_hdmi *hdmi = dev_get_drvdata(dev);

+ if (!IS_ERR(hdmi->audio_pdev))
+ platform_device_unregister(hdmi->audio_pdev);
+
/* Disable all interrupts */
hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);

diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index 5a4f490..82750f6 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -19,6 +19,18 @@ enum {
DW_HDMI_RES_MAX,
};

+struct dw_hdmi;
+
+struct dw_hdmi_audio_data {
+ int irq;
+ struct dw_hdmi *dw;
+
+ u8 (*read)(struct dw_hdmi *hdmi, int offset);
+ void (*write)(struct dw_hdmi *hdmi, u8 val, int offset);
+ void (*mod)(struct dw_hdmi *hdmi, u8 data, u8 mask, unsigned reg);
+ void (*set_sample_rate)(struct dw_hdmi *hdmi, unsigned int rate);
+};
+
enum dw_hdmi_devtype {
IMX6Q_HDMI,
IMX6DL_HDMI,
--
2.1.2



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