From nobody Fri Jun 19 09:10:17 2026 Received: from cstnet.cn (smtp21.cstnet.cn [159.226.251.21]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 29FB440DFDC; Sat, 25 Apr 2026 16:58:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.21 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777136297; cv=none; b=GaUnNnzObbMJGuB3nISGb67gdZnVYWYQ9Sd6xABPlyIFDaJYt3kiBysFbNkdNaSz1i58wk3fzgKTaeIX5SYetV1isRyGHrgV9LlT+a9ffGTsy1dtDp7Bxq3oRzKtrKLWLNV4Pz+z8O5wgHh6amGh7Zm/3OWerDOuOPRDnbmX7uo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777136297; c=relaxed/simple; bh=O/pTHRQlfg9cEgABn9fpBKB7JVcHf2YTVNJHLKfdg8M=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=redMUssegfZkzdq6zSdy9B3nLe1ajSIXx3QM/aZWLFqWnDLKBt6RU3z/5Peu3CiE7Dxm8idwjZHwbTvdroqqydGvDlyJFAOkKCL5w5Jb4xJ9iNhtWPhhBnDQYdU5eiqBx0Dhpi/eZr3tCGZ6Op3zqFBe39BCynT2isx7I3Ebado= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.21 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from edelgard.fodlan.icenowy.me (unknown [112.94.102.10]) by APP-01 (Coremail) with SMTP id qwCowADnjGiR8uxpxvNZDg--.9339S2; Sun, 26 Apr 2026 00:57:54 +0800 (CST) From: Icenowy Zheng To: Neil Armstrong , Jessica Zhang , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Cong Yang Cc: David Airlie , Simona Vetter , Douglas Anderson , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Icenowy Zheng , stable@vger.kernel.org Subject: [PATCH] drm/panel: himax-hx83102: restore MODE_LPM after sending disable cmds Date: Sun, 26 Apr 2026 00:57:51 +0800 Message-ID: <20260425165751.1716569-1-zhengxingda@iscas.ac.cn> X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qwCowADnjGiR8uxpxvNZDg--.9339S2 X-Coremail-Antispam: 1UD129KBjvJXoW7CFWkuw47GFW5uw4UCr15Arb_yoW8GrWUpr srJ34ayFykJFn2yFW5Aa93ZFy3AwsavFWIkFn7WasrCa1jvayUZryktr1xXFyUXw4kG3WS qFnrtF9rXa97AF7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUU9Y14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26r4j6ryUM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4j 6F4UM28EF7xvwVC2z280aVAFwI0_Cr0_Gr1UM28EF7xvwVC2z280aVCY1x0267AKxVW8JV W8Jr1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E 2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJV W8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lFIxGxcIEc7CjxVA2 Y2ka0xkIwI1lc7CjxVAaw2AFwI0_Jw0_GFyl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x 0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2 zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF 4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWU CwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCT nIWIevJa73UjIFyTuYvjfUonmRUUUUU X-CM-SenderInfo: x2kh0wp0lqwv3d6l2u1dvotugofq/ Content-Type: text/plain; charset="utf-8" When preparing the panel, it seems that it always expects commands to be transferred in LP mode. However, the disable function removes the MIPI_DSI_MODE_LPM flag, and no other function re-adds it. As the unprepare function contains no DSI commands, re-adding the flag just after disabling the panel should be safe. Add the code re-adding the flag after the two commands for disabling the panel are sent. This fixes screen unblanking (after blanking once) on mt8188-geralt-ciri-sku1 device. Cc: stable@vger.kernel.org # 6.11+ Fixes: 0ef94554dc40 ("drm/panel: himax-hx83102: Break out as separate drive= r") Signed-off-by: Icenowy Zheng Reviewed-by: Douglas Anderson Reviewed-by: Neil Armstrong --- drivers/gpu/drm/panel/panel-himax-hx83102.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/panel/panel-himax-hx83102.c b/drivers/gpu/drm/= panel/panel-himax-hx83102.c index 8b2a68ee851e3..a5e5c9ea7a73f 100644 --- a/drivers/gpu/drm/panel/panel-himax-hx83102.c +++ b/drivers/gpu/drm/panel/panel-himax-hx83102.c @@ -937,6 +937,8 @@ static int hx83102_disable(struct drm_panel *panel) mipi_dsi_dcs_set_display_off_multi(&dsi_ctx); mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx); =20 + dsi->mode_flags |=3D MIPI_DSI_MODE_LPM; + mipi_dsi_msleep(&dsi_ctx, 150); =20 return dsi_ctx.accum_err; --=20 2.52.0