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Wed, 10 Jun 2026 14:15:19 -0700 (PDT) Received: from hu-mdsor-hyd.qualcomm.com ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-37753d01cc6sm309490a91.11.2026.06.10.14.15.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 10 Jun 2026 14:15:19 -0700 (PDT) From: Mohit Dsor Date: Thu, 11 Jun 2026 02:44:57 +0530 Subject: [PATCH 2/4] drm/bridge: lontium-lt9611c: Increase MCU poll timeout to 200ms Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260611-lt9611-b4-send-v1-2-42abbcd3bb1e@oss.qualcomm.com> References: <20260611-lt9611-b4-send-v1-0-42abbcd3bb1e@oss.qualcomm.com> In-Reply-To: <20260611-lt9611-b4-send-v1-0-42abbcd3bb1e@oss.qualcomm.com> To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Luca Ceresoli , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Vinod Koul Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Mohit Dsor , boss@oss.qualcomm.com, qc-display-maintainer@oss.qualcomm.com X-Mailer: b4 0.15.2 X-Proofpoint-Spam-Info: AW1haW4tMjYwNjEwMDIwNCBTYWx0ZWRfX7X32msduj849 G8noiRj12Fne8Ju+19ttyHTTTctMs+SejyX7sdYbvuI88okHqaZ7pMHXNSbB2LdKsFT8IZbFYUr dWxnzNMWPmQa28N8qvf6cF0h+6qJlts= X-Authority-Analysis: v=2.4 cv=atOCzyZV c=1 sm=1 tr=0 ts=6a29d3ed cx=c_pps a=oF/VQ+ItUULfLr/lQ2/icg==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=FelO9ux0wxsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=EUspDBNiAAAA:8 a=kk0fxjKgInd3OyqQQRkA:9 a=QEXdDO2ut3YA:10 a=3WC7DwWrALyhR5TkjVHa:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjEwMDIwNCBTYWx0ZWRfXzKfprEfCDUqN /zGMcytaP/njiZK+T/s9bJwSDWNH75I/0XGUR/fm+yrlm+bHUx7qAs6e+wffiVNGlGXFnXe+0So iEQH9zPAUGQ3V6P+UZsFsROIchS2Vzm7cD/F2MQEY2zK7BtS2lG3bchEJOzEa1c9LLpcP3Uwpq7 bD8M7qpJT6HHpdexKeCCDswfbU8+Zsm98hq3RbBZVp9L6o7EcR99CSwSAAXGTJc5cHjmFk70UNX vuIUN5QZ5PZPM4jBG2nTMp3+3Apb0El3AR4WRW++OjyYcWzZw2RW+G13zxsX1MKTS3hosu2/yon 2OAMoK0aA0Ly2O6+cFIkWMmasC1wkdXthhUDMsxRYEIQUx0RjIz+noRn24sz3jTuWW9daocImOw aOu3RhxsqY/OyvrmqB8A3C8dW/BIfHtPBTBnqp/wLp/nkwjDp7UaMWp9Rqy8V6RQSkXmE2ktB8W 8ePyeoMZl2/l0EGgpHA== X-Proofpoint-GUID: NPzbog3bqPKcHkkeqFt4wKLDGhEFTuKq X-Proofpoint-ORIG-GUID: NPzbog3bqPKcHkkeqFt4wKLDGhEFTuKq X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-10_04,2026-06-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 impostorscore=0 bulkscore=0 clxscore=1015 spamscore=0 malwarescore=0 phishscore=0 priorityscore=1501 lowpriorityscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606040000 definitions=main-2606100204 The on-chip MCU may take longer than 100ms to respond on some hardware variants or slower I2C buses, causing spurious -ETIMEDOUT errors during normal operation. Double the poll timeout from 100ms to 200ms to improve reliability without changing the poll interval. Signed-off-by: Mohit Dsor --- drivers/gpu/drm/bridge/lontium-lt9611c.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/bridge/lontium-lt9611c.c b/drivers/gpu/drm/bridge/lontium-lt9611c.c index cb584855fd8f..b0402726367e 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9611c.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611c.c @@ -97,7 +97,7 @@ static int lt9611c_read_write_flow(struct lt9611c *lt9611c, u8 *params, regmap_write(lt9611c->regmap, 0xe0de, 0x01); ret = regmap_read_poll_timeout(lt9611c->regmap, 0xe0ae, temp, - temp == 0x01, 1000, 100 * 1000); + temp == 0x01, 1000, 200 * 1000); if (ret) return -ETIMEDOUT; @@ -107,7 +107,7 @@ static int lt9611c_read_write_flow(struct lt9611c *lt9611c, u8 *params, regmap_write(lt9611c->regmap, 0xe0de, 0x02); ret = regmap_read_poll_timeout(lt9611c->regmap, 0xe0ae, temp, - temp == 0x02, 1000, 100 * 1000); + temp == 0x02, 1000, 200 * 1000); if (ret) return -ETIMEDOUT; -- 2.34.1