drm: bridge: add DesignWare HDMI I2S audio support
Current dw-hdmi is supporting sound via AHB bus, but it has
I2S audio feature too. This patch adds I2S audio support to dw-hdmi.
This HDMI I2S is supported by using ALSA SoC common HDMI encoder
driver.
Tested-by: Jose Abreu <joabreu@synopsys.com>
Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/8737j2bxba.wl%kuninori.morimoto.gx@renesas.com
diff --git a/drivers/gpu/drm/bridge/dw-hdmi.c b/drivers/gpu/drm/bridge/dw-hdmi.c
index b71088d..235ce7d 100644
--- a/drivers/gpu/drm/bridge/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/dw-hdmi.c
@@ -1871,10 +1871,11 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
struct device_node *np = dev->of_node;
struct platform_device_info pdevinfo;
struct device_node *ddc_node;
- struct dw_hdmi_audio_data audio;
struct dw_hdmi *hdmi;
int ret;
u32 val = 1;
+ u8 config0;
+ u8 config1;
hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
if (!hdmi)
@@ -2011,7 +2012,12 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
pdevinfo.parent = dev;
pdevinfo.id = PLATFORM_DEVID_AUTO;
- if (hdmi_readb(hdmi, HDMI_CONFIG1_ID) & HDMI_CONFIG1_AHB) {
+ config0 = hdmi_readb(hdmi, HDMI_CONFIG0_ID);
+ config1 = hdmi_readb(hdmi, HDMI_CONFIG1_ID);
+
+ if (config1 & HDMI_CONFIG1_AHB) {
+ struct dw_hdmi_audio_data audio;
+
audio.phys = iores->start;
audio.base = hdmi->regs;
audio.irq = irq;
@@ -2023,6 +2029,18 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
pdevinfo.size_data = sizeof(audio);
pdevinfo.dma_mask = DMA_BIT_MASK(32);
hdmi->audio = platform_device_register_full(&pdevinfo);
+ } else if (config0 & HDMI_CONFIG0_I2S) {
+ struct dw_hdmi_i2s_audio_data audio;
+
+ audio.hdmi = hdmi;
+ audio.write = hdmi_writeb;
+ audio.read = hdmi_readb;
+
+ pdevinfo.name = "dw-hdmi-i2s-audio";
+ pdevinfo.data = &audio;
+ pdevinfo.size_data = sizeof(audio);
+ pdevinfo.dma_mask = DMA_BIT_MASK(32);
+ hdmi->audio = platform_device_register_full(&pdevinfo);
}
/* Reset HDMI DDC I2C master controller and mute I2CM interrupts */