linux-kernel - Re: [PATCH v4 02/13] drm/msm/dpu: Introduce SC8280XP

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Message-ID: <20221207162824.kyxecdz43v5ojatx@builder.lan>
Date:   Wed, 7 Dec 2022 10:28:24 -0600
From:   Bjorn Andersson <andersson@...nel.org>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Bjorn Andersson <quic_bjorande@...cinc.com>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Kalyan Thota <quic_kalyant@...cinc.com>,
        Jessica Zhang <quic_jesszhan@...cinc.com>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>,
        Johan Hovold <johan+linaro@...nel.org>,
        Sankeerth Billakanti <quic_sbillaka@...cinc.com>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 02/13] drm/msm/dpu: Introduce SC8280XP

On Wed, Dec 07, 2022 at 04:49:07PM +0200, Dmitry Baryshkov wrote:
> On 05/12/2022 19:44, Bjorn Andersson wrote:
> > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
[..]
> > +static const struct dpu_mdp_cfg sc8280xp_mdp[] = {
> > +	{
> > +	.name = "top_0", .id = MDP_TOP,
> > +	.base = 0x0, .len = 0x494,
> > +	.features = 0,
> > +	.highest_bank_bit = 0x3, /* TODO: 2 for LP_DDR4 */
> 
> ubwc_swizzle ? I'd suppose it's 6, but I'd bet on it.
> 

I don't see ubwc_swizzle defined for any other platform, and it seems to
be unused for DPU_HW_UBWC_VER_40. Am I perhaps missing something?

> > +	.clk_ctrls[DPU_CLK_CTRL_VIG0] = { .reg_off = 0x2ac, .bit_off = 0},
> > +	.clk_ctrls[DPU_CLK_CTRL_VIG1] = { .reg_off = 0x2b4, .bit_off = 0},
> > +	.clk_ctrls[DPU_CLK_CTRL_VIG2] = { .reg_off = 0x2bc, .bit_off = 0},
> > +	.clk_ctrls[DPU_CLK_CTRL_VIG3] = { .reg_off = 0x2c4, .bit_off = 0},
> > +	.clk_ctrls[DPU_CLK_CTRL_DMA0] = { .reg_off = 0x2ac, .bit_off = 8},
> > +	.clk_ctrls[DPU_CLK_CTRL_DMA1] = { .reg_off = 0x2b4, .bit_off = 8},
> > +	.clk_ctrls[DPU_CLK_CTRL_CURSOR0] = { .reg_off = 0x2bc, .bit_off = 8},
> > +	.clk_ctrls[DPU_CLK_CTRL_CURSOR1] = { .reg_off = 0x2c4, .bit_off = 8},
> > +	.clk_ctrls[DPU_CLK_CTRL_REG_DMA] = { .reg_off = 0x2bc, .bit_off = 20},
> > +	},
> > +};
> > +
> >   static const struct dpu_mdp_cfg qcm2290_mdp[] = {
> >   	{
> >   	.name = "top_0", .id = MDP_TOP,
> > @@ -648,6 +693,45 @@ static const struct dpu_ctl_cfg sc7180_ctl[] = {
> >   	},
> >   };
> > +static const struct dpu_ctl_cfg sc8280xp_ctl[] = {
> > +	{
> > +	.name = "ctl_0", .id = CTL_0,
> > +	.base = 0x15000, .len = 0x204,
> > +	.features = BIT(DPU_CTL_ACTIVE_CFG) | BIT(DPU_CTL_FETCH_ACTIVE) | BIT(DPU_CTL_VM_CFG),
> 
> Please use CTL_SC7270_MASK instead, unless you have a strong reasong not to
> do it.
> 

No strong reason, will update.

Thanks,
Bjorn