linux-kernel - [PATCH 4.19 311/361] media: adv7842: when the EDID is cleared, unconfigure CEC as well

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Date:   Sun, 11 Nov 2018 14:20:58 -0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hans Verkuil <hans.verkuil@...co.com>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Subject: [PATCH 4.19 311/361] media: adv7842: when the EDID is cleared, unconfigure CEC as well

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Hans Verkuil <hans.verkuil@...co.com>

commit ab83203e181015b099720aff43ffabc1812e0fb3 upstream.

When there is no EDID the CEC adapter should be unconfigured as
well. So call cec_phys_addr_invalidate() when this happens.

Signed-off-by: Hans Verkuil <hans.verkuil@...co.com>
Cc: <stable@...r.kernel.org>      # for v4.18 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/media/i2c/adv7842.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/media/i2c/adv7842.c
+++ b/drivers/media/i2c/adv7842.c
@@ -786,8 +786,10 @@ static int edid_write_hdmi_segment(struc
 	/* Disable I2C access to internal EDID ram from HDMI DDC ports */
 	rep_write_and_or(sd, 0x77, 0xf3, 0x00);
 
-	if (!state->hdmi_edid.present)
+	if (!state->hdmi_edid.present) {
+		cec_phys_addr_invalidate(state->cec_adap);
 		return 0;
+	}
 
 	pa = cec_get_edid_phys_addr(edid, 256, &spa_loc);
 	err = cec_phys_addr_validate(pa, &pa, NULL);