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Commit 14840b9a authored by Ricardo Neri's avatar Ricardo Neri Committed by Tomi Valkeinen
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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: default avatarRicardo Neri <ricardo.neri@ti.com>
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
parent d7b6f443

drivers/video/omap2/dss/hdmi.c

+62 −0
Original line number Diff line number Diff line
@@ -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);