Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit a083f6ec authored by Ken Zhang's avatar Ken Zhang Committed by Matt Wagantall
Browse files

msm: mdss: hdmi: add sysfs node for audio video latency 



Add edid_audio_latency and edid_video_latency sysfs nodes to
report the info extracted from edid. AV sync can use these info
to compensate the difference.

Change-Id: I2b1a3f6c0e2d892be8d41651ea898ce47c9d820b
Signed-off-by: default avatarKen Zhang <kenz@codeaurora.org>
parent ab258985

drivers/video/msm/mdss/mdss_hdmi_edid.c

+42 −0
Original line number Diff line number Diff line
@@ -374,6 +374,46 @@ static ssize_t hdmi_edid_sysfs_rda_modes(struct device *dev, 
} /* hdmi_edid_sysfs_rda_modes */

static DEVICE_ATTR(edid_modes, S_IRUGO, hdmi_edid_sysfs_rda_modes, NULL);



static ssize_t hdmi_edid_sysfs_rda_audio_latency(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	ssize_t ret;

	struct hdmi_edid_ctrl *edid_ctrl =

		hdmi_get_featuredata_from_sysfs_dev(dev, HDMI_TX_FEAT_EDID);



	if (!edid_ctrl) {

		DEV_ERR("%s: invalid input\n", __func__);

		return -EINVAL;

	}

	ret = scnprintf(buf, PAGE_SIZE, "%d\n", edid_ctrl->audio_latency);



	DEV_DBG("%s: '%s'\n", __func__, buf);



	return ret;

} /* hdmi_edid_sysfs_rda_audio_latency */

static DEVICE_ATTR(edid_audio_latency, S_IRUGO,

	hdmi_edid_sysfs_rda_audio_latency, NULL);



static ssize_t hdmi_edid_sysfs_rda_video_latency(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	ssize_t ret;

	struct hdmi_edid_ctrl *edid_ctrl =

		hdmi_get_featuredata_from_sysfs_dev(dev, HDMI_TX_FEAT_EDID);



	if (!edid_ctrl) {

		DEV_ERR("%s: invalid input\n", __func__);

		return -EINVAL;

	}

	ret = scnprintf(buf, PAGE_SIZE, "%d\n", edid_ctrl->video_latency);



	DEV_DBG("%s: '%s'\n", __func__, buf);



	return ret;

} /* hdmi_edid_sysfs_rda_video_latency */

static DEVICE_ATTR(edid_video_latency, S_IRUGO,

	hdmi_edid_sysfs_rda_video_latency, NULL);



static ssize_t hdmi_edid_sysfs_rda_physical_address(struct device *dev,

	struct device_attribute *attr, char *buf)

{
@@ -485,6 +525,8 @@ static struct attribute *hdmi_edid_fs_attrs[] = { 
	&dev_attr_edid_raw_data.attr,

	&dev_attr_audio_data_block.attr,

	&dev_attr_spkr_alloc_data_block.attr,

	&dev_attr_edid_audio_latency.attr,

	&dev_attr_edid_video_latency.attr,

	NULL,

};