linux-kernel - Re: [PATCH 2/5] drm: rockchip: add missing registers for RK3188【请注意，邮件由linux-rockchip-bounces+andy.yan=rock-chips.com@...ts.infradead.org代发】

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Message-ID: <c53a4909-03ff-7477-fb71-1418cf97634b@rock-chips.com>
Date:   Tue, 21 Jul 2020 09:17:31 +0800
From:   Andy Yan <andy.yan@...k-chips.com>
To:     Alex Bee <knaerzche@...il.com>, Sandy Huang <hjc@...k-chips.com>,
        Heiko Stübner <heiko@...ech.de>
Cc:     David Airlie <airlied@...ux.ie>, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        Daniel Vetter <daniel@...ll.ch>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/5] drm: rockchip: add missing registers for RK3188【请注意，邮件由linux-rockchip-bounces+andy.yan=rock-chips.com@...ts.infradead.org代发】

Hi Alex:

On 7/20/20 10:46 PM, Alex Bee wrote:
> Hi Andy,
>
> Am 20.07.20 um 10:22 schrieb Andy Yan:
>> Hi Alex:
>>
>> On 7/19/20 4:03 AM, Alex Bee wrote:
>>> This patch adds dither_up, dsp_lut_en, data_blank and dsp_data_swap
>>> registers to enable their respective functionality for RK3188's VOP.
>>>
>>> Signed-off-by: Alex Bee <knaerzche@...il.com>
>>> ---
>>>   drivers/gpu/drm/rockchip/rockchip_vop_reg.c | 4 ++++
>>>   1 file changed, 4 insertions(+)
>>>
>>> diff --git a/drivers/gpu/drm/rockchip/rockchip_vop_reg.c 
>>> b/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
>>> index b046910129fb..971a6bda7458 100644
>>> --- a/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
>>> +++ b/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
>>> @@ -512,6 +512,10 @@ static const struct vop_common rk3188_common = {
>>>       .dither_down_en = VOP_REG(RK3188_DSP_CTRL0, 0x1, 11),
>>>       .dither_down_mode = VOP_REG(RK3188_DSP_CTRL0, 0x1, 10),
>>>       .dsp_blank = VOP_REG(RK3188_DSP_CTRL1, 0x3, 24),
>>> +    .dither_up = VOP_REG(RK3188_DSP_CTRL0, 0x1, 9),
>>> +    .dsp_lut_en = VOP_REG(RK3188_SYS_CTRL, 0x1, 28),
>>> +    .data_blank = VOP_REG(RK3188_DSP_CTRL1, 0x1, 25),
>>> +    .dsp_data_swap = VOP_REG(RK3188_DSP_CTRL1, 0x1f, 26),
>>
>>
>>
>> I can't find the definition of dsp_data_swap, or I missed something?
>>
> Note that .dsp_data_swap is not defined with that name in TRM (as it 
> is not in RK3288/RK3328), since potentially more the one bit would 
> have to be set for this (currently only RB_SWAP (0x2) is implemented 
> in the VOP driver).
>

I mean I didn't find the definition of dsp_data_swap  in struct 
vop_comm, I even search drm-misc-next tree.


> To be some kind of future proof (if BG_SWAP, RG_SWAP, DELTA_SWAP or 
> DUMMY_SWAP ever get implemented) it should be aligned with what is 
> defined for RK3288/RK3328 now to automatically benefit from that 
> additions. And it would, since RK3288_DSP_CTRL0 BIT12, BIT13, BIT14, 
> BIT15, BIT16 exactly matches with RK3188_DSP_CTRL1 BIT26, BIT27, 
> BIT28, BIT29, BIT30.
>
> Current implementation sets BIT13 for RK3288 and with this patch BIT27 
> for RK3188 to enable RB_SWAP.
>
>>
>>
>>>   };
>>>     static const struct vop_win_data rk3188_vop_win_data[] = {
>>
>>
> Regards,
>
> Alex
>
>
>