[Letux-kernel] [PATCH v14 7/9] drm/ingenic: dw-hdmi: make hot plug detection work for CI20

H. Nikolaus Schaller hns at goldelico.com
Sat Feb 12 15:19:25 CET 2022

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 at goldelico.com>
 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;

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