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 --- drivers/gpu/drm/msm/hdmi/hdmi_connector.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c index deec1f9..3973d46 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c @@ -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);