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msm: mdss: add support to read hpd state from sysfs node

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This change adds support to read HPD state from sysfs node,
which will be helpful in automated test cases where multiple
HPD operations are performed on HDMI TV.

Change-Id: I39d19447c01d11a54a8e54c661b2dd177310c205
Signed-off-by: Sandeep Panda <spanda@codeaurora.org>
This commit is contained in:
Sandeep Panda 2016-02-25 14:45:20 +05:30 • committed by David Keitel
parent 94c6261fe7
commit 8e955dcd62
1 changed files with 25 additions and 1 deletions
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26
drivers/video/fbdev/msm/mdss_dba_utils.c
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@ -219,13 +219,37 @@ static ssize_t mdss_dba_utils_sysfs_wta_hpd(struct device *dev,
return count;
}
static ssize_t mdss_dba_utils_sysfs_rda_hpd(struct device *dev,
struct device_attribute *attr, char *buf)
{
ssize_t ret;
struct mdss_dba_utils_data *udata = NULL;
if (!dev) {
pr_debug("invalid device\n");
return -EINVAL;
}
udata = mdss_dba_utils_get_data(dev);
if (!udata) {
pr_debug("invalid input\n");
return -EINVAL;
}
ret = snprintf(buf, PAGE_SIZE, "%d\n", udata->hpd_state);
pr_debug("'%d'\n", udata->hpd_state);
return ret;
}
static DEVICE_ATTR(connected, S_IRUGO,
mdss_dba_utils_sysfs_rda_connected, NULL);
static DEVICE_ATTR(video_mode, S_IRUGO,
mdss_dba_utils_sysfs_rda_video_mode, NULL);
static DEVICE_ATTR(hpd, S_IRUGO | S_IWUSR, NULL,
static DEVICE_ATTR(hpd, S_IRUGO | S_IWUSR, mdss_dba_utils_sysfs_rda_hpd,
mdss_dba_utils_sysfs_wta_hpd);
static struct attribute *mdss_dba_utils_fs_attrs[] = {