From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 119441946DF; Mon, 24 Feb 2025 14:57:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740409072; cv=none; b=lrs1Mn0b4BtUFRNb0bKD0zIXCRLuQ9mWJ8pmSTvMd7VkrFq8OBrJU8UIbwGbb0+OTikrZ5wEgRuODE2YRiL179JCf5Q7MJXrulRrsVARcMb6tDYOwSwjSOz+rOhPiQZgnb18WL5Ztn8r8z+iQYr4LZHk3mbCkuxELCvQid/ondQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740409072; c=relaxed/simple; bh=6uVKfUras1NCQ9SS+yZ4abFOB3MTeoXY4pEhI+VZMsA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UMUwu8tze0JDDo7cBEMmr2EPnommbMImd/JNFBkRj5de8pl5sdoocJToSfARpF9EP/Q3QakibSAwIJvFXpu/DZUhsQUgiC0VErxxvHqaG+vE+pyGLuaXN0++D3DFmVlSkcYpJp0Ps9wMDz2EzvSFZHlSd9JfJ1JDRjG3cJXl3FQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=M+WLB+Te; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="M+WLB+Te" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 73F6AC4CED6; Mon, 24 Feb 2025 14:57:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1740409071; bh=6uVKfUras1NCQ9SS+yZ4abFOB3MTeoXY4pEhI+VZMsA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=M+WLB+TeJm7AuP04dA1dsZoRq3OGeq3+imLMVD1+ugvpSJnlpKJwxgOeZggHDyxFO PkvmGe0acgA196I+wIc8E51hErf+E2P5lSkku8YOfmLiucK1amSRn4C7S/f96fd/10 3yK6WlsOUdtx0B0t4f+Gtn7bc+A1y9l/8hciXrsU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hugo Villeneuve , Neil Armstrong , Linus Walleij Subject: [PATCH 6.13 087/138] drm: panel: jd9365da-h3: fix reset signal polarity Date: Mon, 24 Feb 2025 15:35:17 +0100 Message-ID: <20250224142607.895293212@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250224142604.442289573@linuxfoundation.org> References: <20250224142604.442289573@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.13-stable review patch. If anyone has any objections, please let me know. ------------------ From: Hugo Villeneuve commit a8972d5a49b408248294b5ecbdd0a085e4726349 upstream. In jadard_prepare() a reset pulse is generated with the following statements (delays ommited for clarity): gpiod_set_value(jadard->reset, 1); --> Deassert reset gpiod_set_value(jadard->reset, 0); --> Assert reset for 10ms gpiod_set_value(jadard->reset, 1); --> Deassert reset However, specifying second argument of "0" to gpiod_set_value() means to deassert the GPIO, and "1" means to assert it. If the reset signal is defined as GPIO_ACTIVE_LOW in the DTS, the above statements will incorrectly generate the reset pulse (inverted) and leave it asserted (LOW) at the end of jadard_prepare(). Fix reset behavior by inverting gpiod_set_value() second argument in jadard_prepare(). Also modify second argument to devm_gpiod_get() in jadard_dsi_probe() to assert the reset when probing. Do not modify it in jadard_unprepare() as it is already properly asserted with "1", which seems to be the intended behavior. Fixes: 6b818c533dd8 ("drm: panel: Add Jadard JD9365DA-H3 DSI panel") Cc: stable@vger.kernel.org Signed-off-by: Hugo Villeneuve Reviewed-by: Neil Armstrong Reviewed-by: Linus Walleij Link: https://lore.kernel.org/r/20240927135306.857617-1-hugo@hugovil.com Signed-off-by: Neil Armstrong Link: https://patchwork.freedesktop.org/patch/msgid/20240927135306.857617-1-hugo@hugovil.com Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c +++ b/drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c @@ -109,13 +109,13 @@ static int jadard_prepare(struct drm_pan if (jadard->desc->lp11_to_reset_delay_ms) msleep(jadard->desc->lp11_to_reset_delay_ms); - gpiod_set_value(jadard->reset, 1); + gpiod_set_value(jadard->reset, 0); msleep(5); - gpiod_set_value(jadard->reset, 0); + gpiod_set_value(jadard->reset, 1); msleep(10); - gpiod_set_value(jadard->reset, 1); + gpiod_set_value(jadard->reset, 0); msleep(130); ret = jadard->desc->init(jadard); @@ -1130,7 +1130,7 @@ static int jadard_dsi_probe(struct mipi_ dsi->format = desc->format; dsi->lanes = desc->lanes; - jadard->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); + jadard->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(jadard->reset)) { DRM_DEV_ERROR(&dsi->dev, "failed to get our reset GPIO\n"); return PTR_ERR(jadard->reset);