linux-kernel - [PATCH AUTOSEL 4.18 015/100] drm/i2c: tda9950: set MAX

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Message-Id: <20181016041221.135528-15-sashal@kernel.org>
Date:   Tue, 16 Oct 2018 00:10:56 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     stable@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Hans Verkuil <hverkuil@...all.nl>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 4.18 015/100] drm/i2c: tda9950: set MAX_RETRIES for errors only

From: Hans Verkuil <hverkuil@...all.nl>

[ Upstream commit e0dccce1193f87597548d0db6ecc942fb92c04cd ]

The CEC_TX_STATUS_MAX_RETRIES should be set for errors only to
prevent the CEC framework from retrying the transmit. If the
transmit was successful, then don't set this flag.

Found by running 'cec-compliance -A' on a beaglebone box.

Signed-off-by: Hans Verkuil <hans.verkuil@...co.com>
Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/i2c/tda9950.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i2c/tda9950.c b/drivers/gpu/drm/i2c/tda9950.c
index f2186409f0cf..ccd355d0c123 100644
--- a/drivers/gpu/drm/i2c/tda9950.c
+++ b/drivers/gpu/drm/i2c/tda9950.c
@@ -188,7 +188,8 @@ static irqreturn_t tda9950_irq(int irq, void *data)
 			break;
 		}
 		/* TDA9950 executes all retries for us */
-		tx_status |= CEC_TX_STATUS_MAX_RETRIES;
+		if (tx_status != CEC_TX_STATUS_OK)
+			tx_status |= CEC_TX_STATUS_MAX_RETRIES;
 		cec_transmit_done(priv->adap, tx_status, arb_lost_cnt,
 				  nack_cnt, 0, err_cnt);
 		break;
-- 
2.17.1