linux-kernel - Re: [PATCH v2 1/2] drm/bridge/synopsys: dsi: Add a warning msg on dsi read requests

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Message-ID: <18888350-d764-f6bd-5285-a7fac3d300e0@codeaurora.org>
Date:   Tue, 30 Jan 2018 19:39:49 +0530
From:   Archit Taneja <architt@...eaurora.org>
To:     Brian Norris <briannorris@...omium.org>,
        Philippe Cornu <philippe.cornu@...com>
Cc:     Andrzej Hajda <a.hajda@...sung.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        David Airlie <airlied@...ux.ie>,
        Benjamin Gaignard <benjamin.gaignard@...aro.org>,
        Bhumika Goyal <bhumirks@...il.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Sandy Huang <hjc@...k-chips.com>,
        Heiko Stubner <heiko@...ech.de>,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org,
        Yannick Fertre <yannick.fertre@...com>,
        Vincent Abriou <vincent.abriou@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Ludovic Barre <ludovic.barre@...com>,
        Mickael Reulier <mickael.reulier@...com>
Subject: Re: [PATCH v2 1/2] drm/bridge/synopsys: dsi: Add a warning msg on dsi
 read requests



On 01/26/2018 06:14 AM, Brian Norris wrote:
> On Thu, Jan 25, 2018 at 11:37:59AM +0100, Philippe Cornu wrote:
>> The dcs/generic dsi read feature is not yet implemented so it
>> is important to warn the host_transfer() caller in case of
>> read operation requests.
>>
>> Signed-off-by: Philippe Cornu <philippe.cornu@...com>
> 
> Awesome, thanks.
> 
> Reviewed-by: Brian Norris <briannorris@...omium.org>
> 

Queued to drm-misc-next.

Thanks,
Archit

>> ---
>>   drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 6 ++++++
>>   1 file changed, 6 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
>> index daec7881be6d..72ecaeb40822 100644
>> --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
>> +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
>> @@ -405,6 +405,12 @@ static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host,
>>   	struct mipi_dsi_packet packet;
>>   	int ret;
>>   
>> +	if (msg->rx_buf || msg->rx_len) {
>> +		/* TODO dw drv improvements: implement read feature */
>> +		dev_warn(dsi->dev, "read operations not yet implemented\n");
>> +		return -EINVAL;
>> +	}
>> +
>>   	ret = mipi_dsi_create_packet(&packet, msg);
>>   	if (ret) {
>>   		dev_err(dsi->dev, "failed to create packet: %d\n", ret);
>> -- 
>> 2.15.1
>>

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