From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 8A47C3E44FC; Thu, 25 Jun 2026 12:54:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782392094; cv=none; b=QalINVfkMdn16Rkg39sVOYAK2yJdGz8UMeNkJhGz2lkBmzkF342nuT4mDE8smhPKNWjB9gA3otw2GLVyWv9/dHAdmuHXYYsIFhFHj3hBcdiVApAYg66lRVIpciyANahfiQIZW/4E18h8zkcjVgAf7EFrK/oS0aCe/bnETwanB4A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782392094; c=relaxed/simple; bh=kz89tyTDiSoNmirF9u7A7+d3Cu4+hlcQhqvTojZ9W5w=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=eRiFdtsPHQ6bhY6hpEBuYOnM5O2qtzPQYBUIaNMHlQV/uazQlB90fbvz6aVu3fiMTJH90lCgxIdfyaqDlMbqjO1bZHpwHTsdyQfJZFga4toRKILdRXv+xmOasjarvk/TmTWF23gUeeST0WEZ7RrTqo5yItTtD0JS74+4knPOwYM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=BpAq7m4+; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="BpAq7m4+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3D4AE1F00A3A; Thu, 25 Jun 2026 12:54:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782392093; bh=C8t5+lGRlrzToqOeSgrxbTw2NaFhqhYI+fQbtcvk/Og=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=BpAq7m4+fswodKhLqDVmO1WZZMn52tutfYsGlU8bY0CIWx52+jGFaljPkXDeqrpNi MU31ClXwhk+T5kKsttqG+u5fXJ/8wScR8bnAH2SrWu2IXmK3xBDA6iRemimS/3nFbl QpXh1NMgY2SmckecIUc5xMUfsjop/Bw61s9ZE/V3gK7oir+PIgePYrWrWxZ3xP+Pe9 yxjn+zx+m99nBk3BNCO2LDjhQYnoJOKJRwFBqIk6WUpdBMywZtFg2WZTP7JX+Feheh 5zxOmuxI8f1WzQXpYwrA23AqsNEN1mV/kBCPZFjZRYnIqXWM4ZcjfB0Ytw3g1gldkA tS56x3wJ/DnrQ== Message-ID: <3188f63f-5358-48d7-b934-af20a8f95c6f@kernel.org> Date: Thu, 25 Jun 2026 14:54:43 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 2/2] drm/bridge: Add Lontium LT9611C(EX/UXD) MIPI DSI to HDMI driver To: syyang@lontium.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andrzej.hajda@intel.com, neil.armstrong@linaro.org, dmitry.baryshkov@oss.qualcomm.com, maarten.lankhorst@linux.intel.com, rfoss@kernel.org, mripard@kernel.org Cc: Laurent.pinchart@ideasonboard.com, tzimmermann@suse.de, jonas@kwiboo.se, jernej.skrabec@gmail.com, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, yangsunyun1993@gmail.com, xmzhu@lontium.corp-partner.google.com, xmzhu@lontium.com, rlyu@lontium.com, xbpeng@lontium.com References: <20260508134009.4582-1-syyang@lontium.com> <20260508134009.4582-3-syyang@lontium.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 08/05/2026 15:40, syyang@lontium.com wrote: > + > +static void lt9611c_reset(struct lt9611c *lt9611c) > +{ > + gpiod_set_value_cansleep(lt9611c->reset_gpio, 1); > + msleep(20); > + > + gpiod_set_value_cansleep(lt9611c->reset_gpio, 0); > + msleep(20); > + > + gpiod_set_value_cansleep(lt9611c->reset_gpio, 1); This is just plain wrong. Why do you assert, then de-assert and then finally assert AGAIN the reset leaving the device in powerdown stage? > + msleep(400); > + > + dev_dbg(lt9611c->dev, "lt9611c reset"); Drop such debug statements. This is some downstream, semi-useless code. You are not supposed to add debug to every call. Best regards, Krzysztof