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[2001:14ba:a073:af00:264b:feff:fe8b:be8a]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-38bf99821c4sm24702431fa.27.2026.03.22.18.21.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Mar 2026 18:21:51 -0700 (PDT) From: Dmitry Baryshkov Date: Mon, 23 Mar 2026 03:21:49 +0200 Subject: [PATCH] drm/panel: sharp-ls043t1le01: make use of prepare_prev_first 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: quoted-printable Message-Id: <20260323-panel-fix-v1-1-9f12b09161e8@oss.qualcomm.com> X-B4-Tracking: v=1; b=H4sIAKyVwGkC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDIzMDYyNj3YLEvNQc3bTMCl2TVHNLE1MDi5RUSyMloPqColSgMNis6NjaWgD OIF3OWwAAAA== X-Change-ID: 20260323-panel-fix-4e794508de92 To: Neil Armstrong , Jessica Zhang , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Dmitry Baryshkov , Douglas Anderson , Abhinav Kumar Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1152; i=dmitry.baryshkov@oss.qualcomm.com; h=from:subject:message-id; bh=sTfuRf/e3pyKDVONUmxHUT9BELhQwskmfU0XWxxGsKM=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBpwJWtTb3UME6jPBjYhpdRHXrbjCYEPOvFavHcb k7oOcJdb06JATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCacCVrQAKCRCLPIo+Aiko 1fL8CACFctA8Fq4WV6u+uAkbcC8DThDEm8ClPf/zyp/0yNjxDhpDK0oIZJ+uBN+0cM7BFwWdb3y awusxpe+vB6JGG3Sz22nCiPuAftWsObgc/rc2Z+aU6s/kav/IDjT+G8BVR0PGzJXttZz02rxDkd UzDDo0ez1p+qyFMRoswHWWdwZvSGvCaoQdLSgKfXtKcvA2ea5Lw4i8lIFEWYSTTE8YsF7bF9XSP RuLz8Fg0yvkoZXqY/KYh0DqcE8oLzXM//gcsmWqoi8HOhbYi1dAaiWr6uiQEaO1SOruhV9S23uW wgrEnOgUF0+/eje+VhmHRiWEBRUiq63+frugVtWT9Jwsg8MO X-Developer-Key: i=dmitry.baryshkov@oss.qualcomm.com; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A X-Proofpoint-GUID: yHsnafHFHH3wU8eV5p9atzR2JuEQux91 X-Authority-Analysis: v=2.4 cv=Z5rh3XRA c=1 sm=1 tr=0 ts=69c095b3 cx=c_pps a=wEM5vcRIz55oU/E2lInRtA==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=EUspDBNiAAAA:8 a=4JClWcSM9JSsAyiO1cEA:9 a=QEXdDO2ut3YA:10 a=OIgjcC2v60KrkQgK7BGD:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzIzMDAwOCBTYWx0ZWRfXwiGCF5pDvxCv /FYl94RoQcRFXNsaOY3BH0r7YvyUVUwnfX+xRktbYEdNfg8GrvjCqBbSkC698i+jLJRAv3FEr4b aWFpCETWLIpBmzgjmmW40L/R5XhdOIYSa0eHHGX/8J8jObeUPl7wCWXcQpehakshOeK1UhO6eho +KsKWP6KNtJbrXvNN7iXXwRtzCu7lxOYzCQR15GIdLiAHpExE7gtN8IwMJynnMnDBEqto16oxp+ 7NEjiug+7vmUjTZdEzzzXQofFgqxYFDZK4jYwCEI6V1R2Rj1s+PWHsdSqUos/5RvSbM1EaiZjlJ 8BqU3oeWpBnininvW5KkNWqmpPzqi1o9bfGqD7SwLO2DfBEibFuydvxbGvwY68Eva6JK/6Yo4DQ 4GoRoyoVgZRkLcTTTsBK2TptK912FLDc8eK0tyl5TYuYVjeroFdJ9pJvNtKOUnRsnTfxGJ+/yIO zySQs8PAL4a15Kkj9ew== X-Proofpoint-ORIG-GUID: yHsnafHFHH3wU8eV5p9atzR2JuEQux91 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-22_07,2026-03-20_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 bulkscore=0 suspectscore=0 clxscore=1015 spamscore=0 impostorscore=0 adultscore=0 phishscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603230008 The DSI link must be powered up to let panel driver to talk to the panel during prepare() callback execution. Set the prepare_prev_first flag to guarantee this. Fixes: 9e15123eca79 ("drm/msm/dsi: Stop unconditionally powering up DSI hos= ts at modeset") Signed-off-by: Dmitry Baryshkov Reviewed-by: Douglas Anderson --- drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c b/drivers/gpu/= drm/panel/panel-sharp-ls043t1le01.c index 36abfa2e65e9..dd1eaba23ad3 100644 --- a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c +++ b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c @@ -201,6 +201,7 @@ static int sharp_nt_panel_add(struct sharp_nt_panel *sh= arp_nt) =20 drm_panel_init(&sharp_nt->base, &sharp_nt->dsi->dev, &sharp_nt_panel_funcs, DRM_MODE_CONNECTOR_DSI); + sharp_nt->base.prepare_prev_first =3D true; =20 ret =3D drm_panel_of_backlight(&sharp_nt->base); if (ret) --- base-commit: 8e5a478b6d6a5bb0a3d52147862b15e4d826af19 change-id: 20260323-panel-fix-4e794508de92 Best regards, --=20 With best wishes Dmitry