Commit c95ea162 authored by Archit Taneja's avatar Archit Taneja Committed by Rob Clark
Browse files

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



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: default avatarArchit Taneja <architt@codeaurora.org>
Signed-off-by: default avatarRob Clark <robdclark@gmail.com>
parent dc50f782

drivers/gpu/drm/msm/hdmi/hdmi_connector.c

+9 −0
Original line number Diff line number Diff line
@@ -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);