Creating the accessory devices, such as audio, from the HDMI driver
allows to regard HDMI as a single entity with audio an display
functionality. This intends to follow the design of drivers such
as MFD, in which a single entity handles the creation of the accessory
devices. Such devices are then used by domain-specific drivers; audio in
this case.
Also, this is in line with the DT implementation of HDMI, in which we will
have a single node to describe this feature of the OMAP SoC.
Signed-off-by: Ricardo Neri <ricardo.neri@xxxxxx>
---
drivers/video/omap2/dss/hdmi.c | 62 ++++++++++++++++++++++++++++++++++++++++
1 files changed, 62 insertions(+), 0 deletions(-)
diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index 4adf830..265da29 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -60,6 +60,9 @@
static struct {
struct mutex lock;
struct platform_device *pdev;
+#if defined(CONFIG_OMAP4_DSS_HDMI_AUDIO)
+ struct platform_device *audio_pdev;
+#endif
struct hdmi_ip_data ip_data;
@@ -766,6 +769,54 @@ static void hdmi_put_clocks(void)
}
#if defined(CONFIG_OMAP4_DSS_HDMI_AUDIO)
+static int hdmi_probe_audio(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct platform_device *aud_pdev;
+ u32 port_offset, port_size;
+ struct resource aud_res[2] = {
+ DEFINE_RES_MEM(-1, -1),
+ DEFINE_RES_DMA(-1),
+ };
+
+ res = platform_get_resource(hdmi.pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ DSSERR("can't get IORESOURCE_MEM HDMI\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Pass DMA audio port to audio drivers.
+ * Audio drivers should not ioremap it.
+ */
+ hdmi.ip_data.ops->audio_get_dma_port(&port_offset, &port_size);
+
+ aud_res[0].start = res->start + port_offset;
+ aud_res[0].end = aud_res[0].start + port_size - 1;
+
+ res = platform_get_resource(hdmi.pdev, IORESOURCE_DMA, 0);
+ if (!res) {
+ DSSERR("can't get IORESOURCE_DMA HDMI\n");
+ return -EINVAL;
+ }
+
+ /* Pass the audio DMA request resource to audio drivers. */
+ aud_res[1].start = res->start;
+
+ /* create platform device for HDMI audio driver */
+ aud_pdev = platform_device_register_simple("omap_hdmi_audio",
+ pdev->id, aud_res,
+ ARRAY_SIZE(aud_res));
+ if (IS_ERR(aud_pdev)) {
+ DSSERR("Can't instantiate hdmi-audio\n");
+ return -ENODEV;
+ }
+
+ hdmi.audio_pdev = aud_pdev;
+
+ return 0;
+}
+
int hdmi_compute_acr(u32 sample_freq, u32 *n, u32 *cts)
{
u32 deep_color;
@@ -1046,6 +1097,12 @@ static int __init omapdss_hdmihw_probe(struct platform_device *pdev)
hdmi_probe_pdata(pdev);
+#if defined(CONFIG_OMAP4_DSS_HDMI_AUDIO)
+ r = hdmi_probe_audio(pdev);
+ if (r)
+ DSSWARN("could not create platform device for audio");
+#endif
+
return 0;
err_panel_init:
@@ -1062,6 +1119,11 @@ static int __exit hdmi_remove_child(struct device *dev, void *data)
static int __exit omapdss_hdmihw_remove(struct platform_device *pdev)
{
+#if defined(CONFIG_OMAP4_DSS_HDMI_AUDIO)
+ if (hdmi.audio_pdev != NULL)
+ platform_device_unregister(hdmi.audio_pdev);
+#endif
+
device_for_each_child(&pdev->dev, NULL, hdmi_remove_child);
dss_unregister_child_devices(&pdev->dev);
--
1.7.5.4
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