linux-kernel - Re: [PATCH v2 03/17] drm/msm/dpu: Move non-MDP_TOP INTF

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Date:   Mon, 24 Apr 2023 16:52:19 -0700
From:   Abhinav Kumar <quic_abhinavk@...cinc.com>
To:     Marijn Suijten <marijn.suijten@...ainline.org>
CC:     Rob Clark <robdclark@...il.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Adam Skladowski <a39.skl@...il.com>,
        Loic Poulain <loic.poulain@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>,
        Robert Foss <rfoss@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        Rajesh Yadav <ryadav@...eaurora.org>,
        Jeykumar Sankaran <jsanka@...eaurora.org>,
        "Neil Armstrong" <neil.armstrong@...aro.org>,
        Chandan Uddaraju <chandanu@...eaurora.org>,
        <~postmarketos/upstreaming@...ts.sr.ht>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        "Konrad Dybcio" <konrad.dybcio@...aro.org>,
        Martin Botka <martin.botka@...ainline.org>,
        Jami Kettunen <jami.kettunen@...ainline.org>,
        <linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        "Jordan Crouse" <jordan@...micpenguin.net>,
        Archit Taneja <architt@...eaurora.org>,
        Sravanthi Kollukuduru <skolluku@...eaurora.org>
Subject: Re: [PATCH v2 03/17] drm/msm/dpu: Move non-MDP_TOP INTF_INTR offsets
 out of hwio header



On 4/24/2023 3:25 PM, Marijn Suijten wrote:
> On 2023-04-24 13:44:55, Abhinav Kumar wrote:
>>
>>
>> On 4/17/2023 1:21 PM, Marijn Suijten wrote:
>>> These offsets do not fall under the MDP TOP block and do not fit the
>>> comment right above.  Move them to dpu_hw_interrupts.c next to the
>>> repsective MDP_INTF_x_OFF interrupt block offsets.
>>>
>>> Fixes: 25fdd5933e4c ("drm/msm: Add SDM845 DPU support")
>>> Signed-off-by: Marijn Suijten <marijn.suijten@...ainline.org>
>>
>> This change itself is fine, hence
>>
>> Reviewed-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
>>
>> One comment below.
>>
>>> ---
>>>    drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c | 5 ++++-
>>>    drivers/gpu/drm/msm/disp/dpu1/dpu_hwio.h          | 3 ---
>>>    2 files changed, 4 insertions(+), 4 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
>>> index 53326f25e40e..85c0bda3ff90 100644
>>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
>>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
>>> @@ -15,7 +15,7 @@
>>>    
>>>    /*
>>>     * Register offsets in MDSS register file for the interrupt registers
>>> - * w.r.t. to the MDP base
>>> + * w.r.t. the MDP base
>>>     */
>>>    #define MDP_SSPP_TOP0_OFF		0x0
>>>    #define MDP_INTF_0_OFF			0x6A000
>>> @@ -24,6 +24,9 @@
>>>    #define MDP_INTF_3_OFF			0x6B800
>>>    #define MDP_INTF_4_OFF			0x6C000
>>>    #define MDP_INTF_5_OFF			0x6C800
>>> +#define INTF_INTR_EN			0x1c0
>>> +#define INTF_INTR_STATUS		0x1c4
>>> +#define INTF_INTR_CLEAR			0x1c8
>>>    #define MDP_AD4_0_OFF			0x7C000
>>>    #define MDP_AD4_1_OFF			0x7D000
>>>    #define MDP_AD4_INTR_EN_OFF		0x41c
>>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hwio.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hwio.h
>>> index feb9a729844a..5acd5683d25a 100644
>>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hwio.h
>>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hwio.h
>>> @@ -21,9 +21,6 @@
>>>    #define HIST_INTR_EN                    0x01c
>>>    #define HIST_INTR_STATUS                0x020
>>>    #define HIST_INTR_CLEAR                 0x024
>>
>> Even HIST_INTR_*** need to be moved then.
> 
> These are relative to MDP_SSPP_TOP0_OFF too just like
> INTR(2)_{CLEAR,EN,STATUS} so I left them here.  Otherwise, *all* these
> interrupt masks are probably best moved to dpu_hw_interrupts.c for
> clarity, as that's also the only place they are used?
> 
> Let me know which way you prefer.
> 
> - Marijn

Ah okay, understood, this is fine then.

> 
>>> -#define INTF_INTR_EN                    0x1C0
>>> -#define INTF_INTR_STATUS                0x1C4
>>> -#define INTF_INTR_CLEAR                 0x1C8
>>>    #define SPLIT_DISPLAY_EN                0x2F4
>>>    #define SPLIT_DISPLAY_UPPER_PIPE_CTRL   0x2F8
>>>    #define DSPP_IGC_COLOR0_RAM_LUTN        0x300
>>>