linux-kernel - Re: [PATCH v1 5/5] drm/msm/dpu: add DSC 1.2 hw blocks for relevant chipsets

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Message-ID: <3ee67248-c94c-5f3d-527e-914e8c8b4a31@quicinc.com>
Date:   Fri, 21 Apr 2023 15:05:39 -0700
From:   Kuogee Hsieh <quic_khsieh@...cinc.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        <dri-devel@...ts.freedesktop.org>, <robdclark@...il.com>,
        <sean@...rly.run>, <swboyd@...omium.org>, <dianders@...omium.org>,
        <vkoul@...nel.org>, <daniel@...ll.ch>, <airlied@...il.com>,
        <agross@...nel.org>, <andersson@...nel.org>
CC:     Abhinav Kumar <quic_abhinavk@...cinc.com>,
        <quic_sbillaka@...cinc.com>, <marijn.suijten@...ainline.org>,
        <freedreno@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 5/5] drm/msm/dpu: add DSC 1.2 hw blocks for relevant
 chipsets


On 4/20/2023 5:07 PM, Dmitry Baryshkov wrote:
> On 21/04/2023 02:25, Kuogee Hsieh wrote:
>> From: Abhinav Kumar <quic_abhinavk@...cinc.com>
>>
>> Add DSC 1.2 hardware blocks to the catalog with necessary
>> sub-block and feature flag information.
>> Each display compression engine (DCE) contains dual hard
>> slice DSC encoders so both share same base address but with
>> its own different sub block address.
>
> Please correct line wrapping. 72-75 is usually the preferred width
>
>>
>> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
>> Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
>> ---
>>   .../gpu/drm/msm/disp/dpu1/catalog/dpu_7_0_sm8350.h  | 19 
>> +++++++++++++++++++
>>   .../gpu/drm/msm/disp/dpu1/catalog/dpu_7_2_sc7280.h  | 11 +++++++++++
>>   .../drm/msm/disp/dpu1/catalog/dpu_8_0_sc8280xp.h    | 21 
>> +++++++++++++++++++++
>>   .../gpu/drm/msm/disp/dpu1/catalog/dpu_8_1_sm8450.h  | 19 
>> +++++++++++++++++++
>>   .../gpu/drm/msm/disp/dpu1/catalog/dpu_9_0_sm8550.h  | 19 
>> +++++++++++++++++++
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c      | 12 ++++++++++--
>>   6 files changed, 99 insertions(+), 2 deletions(-)
>>
>
>
> [I commented on sm8550, it applies to all the rest of platforms]
>
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_9_0_sm8550.h 
>> b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_9_0_sm8550.h
>> index 9e40303..72a7bcf 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_9_0_sm8550.h
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_9_0_sm8550.h
>> @@ -165,6 +165,23 @@ static const struct dpu_merge_3d_cfg 
>> sm8550_merge_3d[] = {
>>       MERGE_3D_BLK("merge_3d_3", MERGE_3D_3, 0x66700),
>>   };
>>   +static const struct dpu_dsc_sub_blks sm8550_dsc_sblk_0 = {
>> +    .enc = {.base = 0x100, .len = 0x100},
>> +    .ctl = {.base = 0xF00, .len = 0x10},
>> +};
>> +
>> +static const struct dpu_dsc_sub_blks sm8550_dsc_sblk_1 = {
>> +    .enc = {.base = 0x200, .len = 0x100},
>> +    .ctl = {.base = 0xF80, .len = 0x10},
>> +};
>
> Please keep sblk in dpu_hw_catalog for now.
>
>> +
>> +static const struct dpu_dsc_cfg sm8550_dsc[] = {
>> +    DSC_BLK_1_2("dsc_0", DSC_0, 0x80000, 0x100, 0, sm8550_dsc_sblk_0),
>> +    DSC_BLK_1_2("dsc_0", DSC_1, 0x80000, 0x100, 0, sm8550_dsc_sblk_1),
>
> Is there a reason why index in "dsc_N" doesn't match the DSC_n which 
> comes next to it?

usually each DCE (display compression engine) contains two hard slice 
encoders.

DSC_0 and DSC_1 (index) is belong to dsc_0.

If there are two DCE, then DSC_2 and DSC_3 belong to dsc_1

>
>> +    DSC_BLK_1_2("dsc_1", DSC_2, 0x81000, 0x100, 
>> BIT(DPU_DSC_NATIVE_422_EN), sm8550_dsc_sblk_0),
>> +    DSC_BLK_1_2("dsc_1", DSC_3, 0x81000, 0x100, 
>> BIT(DPU_DSC_NATIVE_422_EN), sm8550_dsc_sblk_1),
>> +};
>> +
>>   static const struct dpu_intf_cfg sm8550_intf[] = {
>>       INTF_BLK("intf_0", INTF_0, 0x34000, 0x280, INTF_DP, 
>> MSM_DP_CONTROLLER_0, 24, INTF_SC7280_MASK, MDP_SSPP_TOP0_INTR, 24, 25),
>>       /* TODO TE sub-blocks for intf1 & intf2 */
>> @@ -218,6 +235,8 @@ const struct dpu_mdss_cfg dpu_sm8550_cfg = {
>>       .dspp = sm8550_dspp,
>>       .pingpong_count = ARRAY_SIZE(sm8550_pp),
>>       .pingpong = sm8550_pp,
>> +    .dsc = sm8550_dsc,
>> +    .dsc_count = ARRAY_SIZE(sm8550_dsc),
>>       .merge_3d_count = ARRAY_SIZE(sm8550_merge_3d),
>>       .merge_3d = sm8550_merge_3d,
>>       .intf_count = ARRAY_SIZE(sm8550_intf),
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c 
>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
>> index 03f162a..be08158 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
>> @@ -1,6 +1,6 @@
>>   // SPDX-License-Identifier: GPL-2.0-only
>>   /* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
>> - * Copyright (c) 2022. Qualcomm Innovation Center, Inc. All rights 
>> reserved.
>> + * Copyright (c) 2022-2023, Qualcomm Innovation Center, Inc. All 
>> rights reserved.
>>    */
>>     #define pr_fmt(fmt)    "[drm:%s:%d] " fmt, __func__, __LINE__
>> @@ -540,7 +540,15 @@ static const struct dpu_pingpong_sub_blks 
>> sc7280_pp_sblk = {
>>       {\
>>       .name = _name, .id = _id, \
>>       .base = _base, .len = 0x140, \
>> -    .features = _features, \
>> +    .features = BIT(DPU_DSC_HW_REV_1_1) | _features, \
>> +    }
>> +
>> +#define DSC_BLK_1_2(_name, _id, _base, _len, _features, _sblk) \
>> +    {\
>> +    .name = _name, .id = _id, \
>> +    .base = _base, .len = _len, \
>> +    .features = BIT(DPU_DSC_HW_REV_1_2) | _features, \
>> +    .sblk = &_sblk, \
>>       }
>> /*************************************************************
>