From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (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 8BF95158D73 for ; Thu, 1 Feb 2024 07:39:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706773193; cv=none; b=NVQjdGtk8Q2vyA6aNC/V81Qx/Dgi8nBxsb/B0/79nJ1FKE/kpO32GhVixs3N1W58ViuJ5+8Shq18CgMybUwJuzza81nODqyMbMgPxhD2ytfNnN+4HEabk10nlqq4oMAXAjwE8TdKwQfwxHg8Czq7LmY4UJWqOjR51oXRl27oneE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706773193; c=relaxed/simple; bh=D7vt8t+Zz5UIHdX41lnFPsMLKfKHutOJU93bZnKmsy4=; h=Message-ID:Date:MIME-Version:Subject:To:References:From:Cc: In-Reply-To:Content-Type; b=opAmd9z4dowDALB11fJ8QSLcxIfWC07kXU0Hu2c0wRfQUWEd/dz+rJ9njw8FGkxt2LhnkxrCl6U7F447tKZQBfY+5CEMP5BXU4ciSHDS09LIWM2qiLDNEyVr7jCXC+waRE7+HI1+EywXXM4Xd93TUHmxY+di6epKrdL8i2/FdSI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=jXMAm/6F; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="jXMAm/6F" Received: from [192.168.88.20] (91-154-35-128.elisa-laajakaista.fi [91.154.35.128]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 622AA4AB0; Thu, 1 Feb 2024 08:38:23 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1706773104; bh=D7vt8t+Zz5UIHdX41lnFPsMLKfKHutOJU93bZnKmsy4=; h=Date:Subject:To:References:From:Cc:In-Reply-To:From; b=jXMAm/6FqXEI4p0Oq9kMtUWqQ8OgELAqXEnqx8IwTG0GYBKBRkoCeyjHkFi+4HBQP NmoS2gmXBKGT4AFTKOhuQwMqaU//8b9Tj93c4g7PCaaTkJzvoT2R1rxK9D4s1RhS++ SWCUq+8hH0IT5QbwvoaUCdq9z8x7Cm9jXcfM7qCI= Message-ID: Date: Thu, 1 Feb 2024 09:39:39 +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 v3 3/5] drm: xlnx: zynqmp_dpsub: Clear status register ASAP Content-Language: en-US To: Anatoliy Klymenko References: <20240124025402.373620-1-anatoliy.klymenko@amd.com> <20240124025402.373620-4-anatoliy.klymenko@amd.com> From: Tomi Valkeinen Cc: laurent.pinchart@ideasonboard.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, daniel@ffwll.ch, michal.simek@amd.com, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Autocrypt: addr=tomi.valkeinen@ideasonboard.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 24/01/2024 04:54, Anatoliy Klymenko wrote: > Clear status register as soon as we read it. > > Addressing comments from > https://lore.kernel.org/dri-devel/beb551c7-bb7e-4cd0-b166-e9aad90c4620@ideasonboard.com/ > > Signed-off-by: Anatoliy Klymenko > --- > drivers/gpu/drm/xlnx/zynqmp_dp.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c > index d60b7431603f..5a3335e1fffa 100644 > --- a/drivers/gpu/drm/xlnx/zynqmp_dp.c > +++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c > @@ -1624,6 +1624,8 @@ static irqreturn_t zynqmp_dp_irq_handler(int irq, void *data) > u32 status, mask; > > status = zynqmp_dp_read(dp, ZYNQMP_DP_INT_STATUS); > + /* clear status register as soon as we read it */ > + zynqmp_dp_write(dp, ZYNQMP_DP_INT_STATUS, status); > mask = zynqmp_dp_read(dp, ZYNQMP_DP_INT_MASK); > if (!(status & ~mask)) > return IRQ_NONE; > @@ -1634,8 +1636,6 @@ static irqreturn_t zynqmp_dp_irq_handler(int irq, void *data) > if (status & ZYNQMP_DP_INT_CHBUF_OVERFLW_MASK) > dev_dbg_ratelimited(dp->dev, "overflow interrupt\n"); > > - zynqmp_dp_write(dp, ZYNQMP_DP_INT_STATUS, status); > - > if (status & ZYNQMP_DP_INT_VBLANK_START) > zynqmp_dpsub_drm_handle_vblank(dp->dpsub); > Reviewed-by: Tomi Valkeinen Tomi