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

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Message-ID: <7j6ww6nkplq6adjgpzu3uyswdmid2oxldpwlmis6cyw7tcbkrh@whpmzhsl5rpj>
Date:   Tue, 25 Apr 2023 00:25:31 +0200
From:   Marijn Suijten <marijn.suijten@...ainline.org>
To:     Abhinav Kumar <quic_abhinavk@...cinc.com>
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 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

> > -#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
> >