linux-kernel - Re: [PATCH v3 4/6] drm/rockchip/dsi: add dual mipi channel support

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Message-ID: <bfb92284-fa18-ab3e-1f15-6d8344d2a0ee@codeaurora.org>
Date:   Thu, 26 Oct 2017 10:41:26 +0530
From:   Archit Taneja <architt@...eaurora.org>
To:     Sean Paul <seanpaul@...omium.org>,
        Nickey Yang <nickey.yang@...k-chips.com>
Cc:     mark.yao@...k-chips.com, robh+dt@...nel.org, heiko@...ech.de,
        mark.rutland@....com, airlied@...ux.ie,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-rockchip@...ts.infradead.org, briannorris@...omium.org,
        hl@...k-chips.com, zyw@...k-chips.comg, xbl@...k-chips.com
Subject: Re: [PATCH v3 4/6] drm/rockchip/dsi: add dual mipi channel support



On 10/25/2017 01:34 PM, Sean Paul wrote:
> On Wed, Oct 25, 2017 at 11:51:01AM +0800, Nickey Yang wrote:
>> This patch add dual mipi channel support:
>> 1.add definition of dsi1 register and grf operation.
>> 2.dsi0 and dsi1 will work in master and slave mode
>> when driving dual mipi panel.
>>
>> Signed-off-by: Nickey Yang <nickey.yang@...k-chips.com>
>> ---
> 
> In the last revision, I asked you to provide changelog between revisions,
> *please* do this. You received review on the last version and a bunch of the
> feedback hasn't been taken into account with no explanation as to why. Please go
> back to the last version, read the reviews that people were generous enough to
> give and either fix the code or explain why you're not.
> 
>>   drivers/gpu/drm/rockchip/dw-mipi-dsi.c      | 377 ++++++++++++++++++++--------
>>   drivers/gpu/drm/rockchip/rockchip_drm_drv.h |   1 +
>>   drivers/gpu/drm/rockchip/rockchip_drm_vop.c |   2 +
>>   drivers/gpu/drm/rockchip/rockchip_drm_vop.h |   3 +
>>   drivers/gpu/drm/rockchip/rockchip_vop_reg.c |   1 +
>>   5 files changed, 279 insertions(+), 105 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
>> index 589b420..25e7b77 100644
>> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
>> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> 
> <snip />
> 
>> +static int rockchip_dsi_dual_channel_probe(struct dw_mipi_dsi *dsi)
>> +{
>> +	struct device_node *np;
>> +	struct platform_device *secondary;
>> +
>> +	np = of_parse_phandle(dsi->dev->of_node, "rockchip,dual-channel", 0);
>> +	if (np) {
>> +		secondary = of_find_device_by_node(np);
>> +		dsi->slave = platform_get_drvdata(secondary);
>> +		of_node_put(np);
>> +
>> +		if (!dsi->slave)
>> +			return -EPROBE_DEFER;
> 
> Archit asked you not to do this in the previous review.

I've replied with some more details to the patch which adds this in the DT
binding doc.

Thanks,
Archit

> 
>> +
>> +		dsi->slave->master = dsi;
>> +	}
>> +
>> +	return 0;
>> +}
> 
> <snip />
> 
>> -- 
>> 1.9.1
>>
> 

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