media: synopsys: hdmirx: Fix HPD lane hold time

Increase time of holding HPD lane low by 50ms. This fixes EDID change not
detected by source/display side.

Fixes: 7b59b132ad43 ("media: platform: synopsys: Add support for HDMI input driver")
Cc: stable@vger.kernel.org
Reported-by: Ross Cawston <ross@r-sc.ca>
Closes: https://lore.kernel.org/linux-rockchip/20260209061654.54757-1-ross@r-sc.ca/
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>

diff --git a/drivers/media/platform/synopsys/hdmirx/snps_hdmirx.c b/drivers/media/platform/synopsys/hdmirx/snps_hdmirx.c
index 61ad20b18b8d6522607076f06d806fe11e9ff8d3..4c8957505a50dc3b4b9e51827f27913556f9734a 100644 (file)
--- a/drivers/media/platform/synopsys/hdmirx/snps_hdmirx.c
+++ b/drivers/media/platform/synopsys/hdmirx/snps_hdmirx.c
@@ -506,9 +506,9 @@ static void hdmirx_hpd_ctrl(struct snps_hdmirx_dev *hdmirx_dev, bool en)
        hdmirx_writel(hdmirx_dev, CORE_CONFIG,
                      hdmirx_dev->hpd_trigger_level_high ? en : !en);
 
-       /* 100ms delay as per HDMI spec */
+       /* 100ms delay as per HDMI spec + extra 50ms to cover internal delay */
        if (!en)
-               msleep(100);
+               msleep(100 + 50);
 }
 
 static void hdmirx_write_edid_data(struct snps_hdmirx_dev *hdmirx_dev,