OMAPDSS: hdmi4: Register ASoC platform device for omap hdmi audio

Implements callbacks for OMAP HDMI audio platform driver and registers
it in probe function. Unregistering is done in remove function.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 125 insertions, 0 deletions

diff --git a/drivers/video/fbdev/omap2/dss/hdmi4.c b/drivers/video/fbdev/omap2/dss/hdmi4.c
index 33ed4109f7bc..e76cc5fb8430 100644
--- a/drivers/video/fbdev/omap2/dss/hdmi4.c
+++ b/drivers/video/fbdev/omap2/dss/hdmi4.c
@@ -33,6 +33,7 @@
 #include <linux/gpio.h>
 #include <linux/regulator/consumer.h>
 #include <video/omapdss.h>
+#include <sound/omap-hdmi-audio.h>
 
 #include "hdmi4_core.h"
 #include "dss.h"
@@ -340,6 +341,8 @@ static int hdmi_display_enable(struct omap_dss_device *dssdev)
                 goto err0;
         }
 
+        hdmi.display_enabled = true;
+
         mutex_unlock(&hdmi.lock);
         return 0;
 
@@ -354,8 +357,13 @@ static void hdmi_display_disable(struct omap_dss_device *dssdev)
 
         mutex_lock(&hdmi.lock);
 
+        if (hdmi.audio_pdev && hdmi.audio_abort_cb)
+                hdmi.audio_abort_cb(&hdmi.audio_pdev->dev);
+
         hdmi_power_off_full(dssdev);
 
+        hdmi.display_enabled = false;
+
         mutex_unlock(&hdmi.lock);
 }
 
@@ -531,6 +539,112 @@ err:
         return r;
 }
 
+/* Audio callbacks */
+static int hdmi_audio_startup(struct device *dev,
+                              void (*abort_cb)(struct device *dev))
+{
+        struct omap_hdmi *hd = dev_get_drvdata(dev);
+        int ret = 0;
+
+        mutex_lock(&hd->lock);
+
+        if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
+                ret = -EPERM;
+                goto out;
+        }
+
+        hd->audio_abort_cb = abort_cb;
+
+out:
+        mutex_unlock(&hd->lock);
+
+        return ret;
+}
+
+static int hdmi_audio_shutdown(struct device *dev)
+{
+        struct omap_hdmi *hd = dev_get_drvdata(dev);
+
+        mutex_lock(&hd->lock);
+        hd->audio_abort_cb = NULL;
+        mutex_unlock(&hd->lock);
+
+        return 0;
+}
+
+static int hdmi_audio_start(struct device *dev)
+{
+        struct omap_hdmi *hd = dev_get_drvdata(dev);
+
+        WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
+        WARN_ON(!hd->display_enabled);
+
+        hdmi_wp_audio_enable(&hd->wp, true);
+        hdmi4_audio_start(&hd->core, &hd->wp);
+
+        return 0;
+}
+
+static void hdmi_audio_stop(struct device *dev)
+{
+        struct omap_hdmi *hd = dev_get_drvdata(dev);
+
+        WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
+        WARN_ON(!hd->display_enabled);
+
+        hdmi4_audio_stop(&hd->core, &hd->wp);
+        hdmi_wp_audio_enable(&hd->wp, false);
+}
+
+static int hdmi_audio_config(struct device *dev,
+                             struct omap_dss_audio *dss_audio)
+{
+        struct omap_hdmi *hd = dev_get_drvdata(dev);
+        int ret;
+
+        mutex_lock(&hd->lock);
+
+        if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
+                ret = -EPERM;
+                goto out;
+        }
+
+        ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
+                                 hd->cfg.timings.pixelclock);
+
+out:
+        mutex_unlock(&hd->lock);
+
+        return ret;
+}
+
+static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
+        .audio_startup = hdmi_audio_startup,
+        .audio_shutdown = hdmi_audio_shutdown,
+        .audio_start = hdmi_audio_start,
+        .audio_stop = hdmi_audio_stop,
+        .audio_config = hdmi_audio_config,
+};
+
+static int hdmi_audio_register(struct device *dev)
+{
+        struct omap_hdmi_audio_pdata pdata = {
+                .dev = dev,
+                .dss_version = omapdss_get_version(),
+                .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
+                .ops = &hdmi_audio_ops,
+        };
+
+        hdmi.audio_pdev = platform_device_register_data(
+                dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
+                &pdata, sizeof(pdata));
+
+        if (IS_ERR(hdmi.audio_pdev))
+                return PTR_ERR(hdmi.audio_pdev);
+
+        return 0;
+}
+
 /* HDMI HW IP initialisation */
 static int omapdss_hdmihw_probe(struct platform_device *pdev)
 {
@@ -583,6 +697,14 @@ static int omapdss_hdmihw_probe(struct platform_device *pdev)
 
         hdmi_init_output(pdev);
 
+        r = hdmi_audio_register(&pdev->dev);
+        if (r) {
+                DSSERR("Registering HDMI audio failed\n");
+                hdmi_uninit_output(pdev);
+                pm_runtime_disable(&pdev->dev);
+                return r;
+        }
+
         dss_debugfs_create_file("hdmi", hdmi_dump_regs);
 
         return 0;
@@ -593,6 +715,9 @@ err:
 
 static int __exit omapdss_hdmihw_remove(struct platform_device *pdev)
 {
+        if (hdmi.audio_pdev)
+                platform_device_unregister(hdmi.audio_pdev);
+
         hdmi_uninit_output(pdev);
 
         hdmi_pll_uninit(&hdmi.pll);