Reconfigure and restart audio when display is enabled, if audio playback was active before. The audio configuration is stored when is is successfully applied and a boolean is set when playback has started and unset when stopped. This data is used to reconfigure the audio when display is re-enabled. Abort audio playback if reconfiguration fails.
A new spin lock is introduced to in order protect state variables related to audio playback status. The wp_idlemode protection relies on PM not touching it after the original initialization. A power management API for controlling the idlemode would be needed for proper synchronization. Signed-off-by: Jyri Sarha <jsa...@ti.com> --- drivers/video/fbdev/omap2/dss/hdmi.h | 10 +++- drivers/video/fbdev/omap2/dss/hdmi4.c | 65 ++++++++++++++++++++----- drivers/video/fbdev/omap2/dss/hdmi5.c | 89 +++++++++++++++++++++++++++++------ 3 files changed, 137 insertions(+), 27 deletions(-) diff --git a/drivers/video/fbdev/omap2/dss/hdmi.h b/drivers/video/fbdev/omap2/dss/hdmi.h index e4a32fe..1e45b84 100644 --- a/drivers/video/fbdev/omap2/dss/hdmi.h +++ b/drivers/video/fbdev/omap2/dss/hdmi.h @@ -351,12 +351,20 @@ struct omap_hdmi { struct regulator *vdda_reg; bool core_enabled; - bool display_enabled; struct omap_dss_device output; struct platform_device *audio_pdev; void (*audio_abort_cb)(struct device *dev); + + bool audio_configured; + struct omap_dss_audio audio_config; + + /* This lock should be taken when any one of the three + state variables bellow are touched. */ + spinlock_t audio_playing_lock; + bool audio_playing; + bool display_enabled; int wp_idlemode; }; diff --git a/drivers/video/fbdev/omap2/dss/hdmi4.c b/drivers/video/fbdev/omap2/dss/hdmi4.c index 6d3aa3f..ea1fa64 100644 --- a/drivers/video/fbdev/omap2/dss/hdmi4.c +++ b/drivers/video/fbdev/omap2/dss/hdmi4.c @@ -324,6 +324,7 @@ static int read_edid(u8 *buf, int len) static int hdmi_display_enable(struct omap_dss_device *dssdev) { struct omap_dss_device *out = &hdmi.output; + unsigned long flags; int r = 0; DSSDBG("ENTER hdmi_display_enable\n"); @@ -342,7 +343,26 @@ static int hdmi_display_enable(struct omap_dss_device *dssdev) goto err0; } + if (hdmi.audio_configured) { + hdmi4_audio_stop(&hdmi.core, &hdmi.wp); + hdmi_wp_audio_enable(&hdmi.wp, false); + + r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config, + hdmi.cfg.timings.pixelclock); + if (r) { + DSSERR("Error restoring audio configuration: %d", r); + hdmi.audio_abort_cb(&hdmi.pdev->dev); + hdmi.audio_configured = false; + } + } + + spin_lock_irqsave(&hdmi.audio_playing_lock, flags); + if (hdmi.audio_configured && hdmi.audio_playing) { + hdmi_wp_audio_enable(&hdmi.wp, true); + hdmi4_audio_start(&hdmi.core, &hdmi.wp); + } hdmi.display_enabled = true; + spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags); mutex_unlock(&hdmi.lock); return 0; @@ -354,17 +374,18 @@ err0: static void hdmi_display_disable(struct omap_dss_device *dssdev) { + unsigned long flags; + DSSDBG("Enter hdmi_display_disable\n"); mutex_lock(&hdmi.lock); - if (hdmi.audio_pdev && hdmi.audio_abort_cb) - hdmi.audio_abort_cb(&hdmi.audio_pdev->dev); + spin_lock_irqsave(&hdmi.audio_playing_lock, flags); + hdmi.display_enabled = false; + spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags); hdmi_power_off_full(dssdev); - hdmi.display_enabled = false; - mutex_unlock(&hdmi.lock); } @@ -565,9 +586,14 @@ out: static int hdmi_audio_shutdown(struct device *dev) { struct omap_hdmi *hd = dev_get_drvdata(dev); + unsigned long flags; mutex_lock(&hd->lock); hd->audio_abort_cb = NULL; + hd->audio_configured = false; + spin_lock_irqsave(&hd->audio_playing_lock, flags); + hd->audio_playing = false; + spin_unlock_irqrestore(&hd->audio_playing_lock, flags); mutex_unlock(&hd->lock); return 0; @@ -576,25 +602,38 @@ static int hdmi_audio_shutdown(struct device *dev) static int hdmi_audio_start(struct device *dev) { struct omap_hdmi *hd = dev_get_drvdata(dev); + unsigned long flags; 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); + spin_lock_irqsave(&hd->audio_playing_lock, flags); + + if (hd->display_enabled) { + hdmi_wp_audio_enable(&hd->wp, true); + hdmi4_audio_start(&hd->core, &hd->wp); + } + hd->audio_playing = true; + spin_unlock_irqrestore(&hd->audio_playing_lock, flags); return 0; } static void hdmi_audio_stop(struct device *dev) { struct omap_hdmi *hd = dev_get_drvdata(dev); + unsigned long flags; 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); + spin_lock_irqsave(&hd->audio_playing_lock, flags); + + if (hd->display_enabled) { + hdmi4_audio_stop(&hd->core, &hd->wp); + hdmi_wp_audio_enable(&hd->wp, false); + } + hd->audio_playing = false; + + spin_unlock_irqrestore(&hd->audio_playing_lock, flags); } static int hdmi_audio_config(struct device *dev, @@ -612,7 +651,10 @@ static int hdmi_audio_config(struct device *dev, ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio, hd->cfg.timings.pixelclock); - + if (!ret) { + hd->audio_configured = true; + hd->audio_config = *dss_audio; + } out: mutex_unlock(&hd->lock); @@ -657,6 +699,7 @@ static int hdmi4_bind(struct device *dev, struct device *master, void *data) dev_set_drvdata(&pdev->dev, &hdmi); mutex_init(&hdmi.lock); + spin_lock_init(&hdmi.audio_playing_lock); if (pdev->dev.of_node) { r = hdmi_probe_of(pdev); diff --git a/drivers/video/fbdev/omap2/dss/hdmi5.c b/drivers/video/fbdev/omap2/dss/hdmi5.c index 7f87578..f352c4b 100644 --- a/drivers/video/fbdev/omap2/dss/hdmi5.c +++ b/drivers/video/fbdev/omap2/dss/hdmi5.c @@ -352,6 +352,7 @@ static int read_edid(u8 *buf, int len) static int hdmi_display_enable(struct omap_dss_device *dssdev) { struct omap_dss_device *out = &hdmi.output; + unsigned long flags; int r = 0; DSSDBG("ENTER hdmi_display_enable\n"); @@ -370,7 +371,37 @@ static int hdmi_display_enable(struct omap_dss_device *dssdev) goto err0; } + if (hdmi.audio_configured) { + spin_lock_irqsave(&hdmi.audio_playing_lock, flags); + hdmi_wp_audio_core_req_enable(&hdmi.wp, false); + hdmi_wp_audio_enable(&hdmi.wp, false); + if (hdmi.wp_idlemode > 0) + REG_FLD_MOD(hdmi.wp.base, HDMI_WP_SYSCONFIG, + hdmi.wp_idlemode, 3, 2); + hdmi.wp_idlemode = -1; + spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags); + + r = hdmi5_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config, + hdmi.cfg.timings.pixelclock); + if (r) { + DSSERR("Error restoring audio configuration: %d", r); + hdmi.audio_abort_cb(&hdmi.pdev->dev); + hdmi.audio_configured = false; + } + } + + spin_lock_irqsave(&hdmi.audio_playing_lock, flags); + if (hdmi.audio_configured && hdmi.audio_playing) { + /* No-idle while playing audio, store the old value */ + hdmi.wp_idlemode = + REG_GET(hdmi.wp.base, HDMI_WP_SYSCONFIG, 3, 2); + REG_FLD_MOD(hdmi.wp.base, HDMI_WP_SYSCONFIG, 1, 3, 2); + + hdmi_wp_audio_enable(&hdmi.wp, true); + hdmi_wp_audio_core_req_enable(&hdmi.wp, true); + } hdmi.display_enabled = true; + spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags); mutex_unlock(&hdmi.lock); return 0; @@ -382,17 +413,18 @@ err0: static void hdmi_display_disable(struct omap_dss_device *dssdev) { + unsigned long flags; + DSSDBG("Enter hdmi_display_disable\n"); mutex_lock(&hdmi.lock); - if (hdmi.audio_pdev && hdmi.audio_abort_cb) - hdmi.audio_abort_cb(&hdmi.audio_pdev->dev); + spin_lock_irqsave(&hdmi.audio_playing_lock, flags); + hdmi.display_enabled = false; + spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags); hdmi_power_off_full(dssdev); - hdmi.display_enabled = false; - mutex_unlock(&hdmi.lock); } @@ -593,9 +625,14 @@ out: static int hdmi_audio_shutdown(struct device *dev) { struct omap_hdmi *hd = dev_get_drvdata(dev); + unsigned long flags; mutex_lock(&hd->lock); hd->audio_abort_cb = NULL; + hd->audio_configured = false; + spin_lock_irqsave(&hd->audio_playing_lock, flags); + hd->audio_playing = false; + spin_unlock_irqrestore(&hd->audio_playing_lock, flags); mutex_unlock(&hd->lock); return 0; @@ -604,32 +641,48 @@ static int hdmi_audio_shutdown(struct device *dev) static int hdmi_audio_start(struct device *dev) { struct omap_hdmi *hd = dev_get_drvdata(dev); + unsigned long flags; WARN_ON(!hdmi_mode_has_audio(&hd->cfg)); - WARN_ON(!hd->display_enabled); - /* No-idle while playing audio, store the old value */ - hd->wp_idlemode = REG_GET(hdmi.wp.base, HDMI_WP_SYSCONFIG, 3, 2); - REG_FLD_MOD(hdmi.wp.base, HDMI_WP_SYSCONFIG, 1, 3, 2); + spin_lock_irqsave(&hd->audio_playing_lock, flags); - hdmi_wp_audio_enable(&hd->wp, true); - hdmi_wp_audio_core_req_enable(&hd->wp, true); + if (hd->display_enabled) { + /* No-idle while playing audio, store the old value */ + hd->wp_idlemode = + REG_GET(hdmi.wp.base, HDMI_WP_SYSCONFIG, 3, 2); + REG_FLD_MOD(hdmi.wp.base, HDMI_WP_SYSCONFIG, 1, 3, 2); + + hdmi_wp_audio_enable(&hd->wp, true); + hdmi_wp_audio_core_req_enable(&hd->wp, true); + } + hd->audio_playing = true; + spin_unlock_irqrestore(&hd->audio_playing_lock, flags); return 0; } static void hdmi_audio_stop(struct device *dev) { struct omap_hdmi *hd = dev_get_drvdata(dev); + unsigned long flags; WARN_ON(!hdmi_mode_has_audio(&hd->cfg)); - WARN_ON(!hd->display_enabled); - hdmi_wp_audio_core_req_enable(&hd->wp, false); - hdmi_wp_audio_enable(&hd->wp, false); + spin_lock_irqsave(&hd->audio_playing_lock, flags); - /* Playback stopped, restore original idlemode */ - REG_FLD_MOD(hdmi.wp.base, HDMI_WP_SYSCONFIG, hd->wp_idlemode, 3, 2); + if (hd->display_enabled) { + hdmi_wp_audio_core_req_enable(&hd->wp, false); + hdmi_wp_audio_enable(&hd->wp, false); + + /* Playback stopped, restore original idlemode */ + REG_FLD_MOD(hdmi.wp.base, HDMI_WP_SYSCONFIG, hd->wp_idlemode, + 3, 2); + hd->wp_idlemode = -1; + } + hd->audio_playing = false; + + spin_unlock_irqrestore(&hd->audio_playing_lock, flags); } static int hdmi_audio_config(struct device *dev, @@ -648,6 +701,10 @@ static int hdmi_audio_config(struct device *dev, ret = hdmi5_audio_config(&hd->core, &hd->wp, dss_audio, hd->cfg.timings.pixelclock); + if (!ret) { + hd->audio_configured = true; + hd->audio_config = *dss_audio; + } out: mutex_unlock(&hd->lock); @@ -692,6 +749,8 @@ static int hdmi5_bind(struct device *dev, struct device *master, void *data) dev_set_drvdata(&pdev->dev, &hdmi); mutex_init(&hdmi.lock); + spin_lock_init(&hdmi.audio_playing_lock); + hdmi.wp_idlemode = -1; if (pdev->dev.of_node) { r = hdmi_probe_of(pdev); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html