iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/msm/hdmi: Fix connector detect when there is no HPD gpio

Browse Source 
Some platforms may not have a HPD gpio line to detect Hot Plug signal from
the connector. They need to rely only on reading REG_HDMI_HPD_INT_STATUS
for HPD.

Modify hdmi_connector_detect logic such that it checks for HPD only using
the status register if there is no HPD gpio.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Archit Taneja 2016-02-25 11:22:37 +05:30 committed by Rob Clark
parent dc50f782c9
commit c95ea16254
1 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/gpu/drm/msm/hdmi/hdmi_connector.c
View File

@ -301,9 +301,18 @@ static enum drm_connector_status hdmi_connector_detect(
{
struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
struct hdmi *hdmi = hdmi_connector->hdmi;
const struct hdmi_platform_config *config = hdmi->config;
struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX];
enum drm_connector_status stat_gpio, stat_reg;
int retry = 20;
/*
* some platforms may not have hpd gpio. Rely only on the status
* provided by REG_HDMI_HPD_INT_STATUS in this case.
*/
if (hpd_gpio.num == -1)
return detect_reg(hdmi);
do {
stat_gpio = detect_gpio(hdmi);
stat_reg = detect_reg(hdmi);