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OMAPDSS: HDMI: Create platform device for audio support 

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@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Ricardo Neri 2012-11-06 00:19:17 -06:00 committed by Tomi Valkeinen
parent d7b6f4437f
commit 14840b9a83
1 changed files with 62 additions and 0 deletions
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62
drivers/video/omap2/dss/hdmi.c
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@ -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;
@ -818,6 +821,54 @@ 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;
@ -1098,6 +1149,12 @@ 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:
@ -1114,6 +1171,11 @@ 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);