[PATCH v15 6/7] drm/ingenic: dw-hdmi: make hot plug detection work for CI20

From: H. Nikolaus Schaller
Date: Sat Feb 12 2022 - 10:51:23 EST


There is no hpd-gpio installed on the CI20 board HDMI connector.
Hence there is no hpd detection by the connector driver and we
have to enable polling by the dw-hdmi driver.

We need to set .poll_enabled but that struct component
can only be accessed in the core code. Hence we use the public
setter function drm_kms_helper_hotplug_event().

Signed-off-by: H. Nikolaus Schaller <hns@xxxxxxxxxxxxx>
---
drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c b/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c
index 34e986dd606cf..90547a28dc5c7 100644
--- a/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c
+++ b/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c
@@ -55,6 +55,8 @@ ingenic_dw_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data,
if (mode->clock > 216000)
return MODE_CLOCK_HIGH;

+ dw_hdmi_enable_poll(hdmi, true);
+
return MODE_OK;
}

--
2.33.0