linux-kernel - Re: [PATCH 2/2] drm/msm/dsi: Add phy configuration for SM6375

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Message-ID: <0df556d3-b478-d8e6-fa85-8696ff2377d0@linaro.org>
Date:   Mon, 16 Jan 2023 12:49:12 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, andersson@...nel.org,
        agross@...nel.org, krzysztof.kozlowski@...aro.org,
        marijn.suijten@...ainline.org, 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>,
        Jonathan Marek <jonathan@...ek.ca>,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Douglas Anderson <dianders@...omium.org>,
        sunliming <sunliming@...inos.cn>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        José Expósito <jose.exposito89@...il.com>,
        Rajeev Nandan <quic_rajeevny@...cinc.com>,
        Loic Poulain <loic.poulain@...aro.org>
Subject: Re: [PATCH 2/2] drm/msm/dsi: Add phy configuration for SM6375



On 16.01.2023 12:47, Dmitry Baryshkov wrote:
> On Mon, 16 Jan 2023 at 13:42, Konrad Dybcio <konrad.dybcio@...aro.org> wrote:
>>
>>
>>
>> On 16.01.2023 12:40, Konrad Dybcio wrote:
>>> From: Konrad Dybcio <konrad.dybcio@...ainline.org>
>>>
>>> SM6375 uses a boring standard 7nm PHY. Add a configuration entry for it.
>>>
>>> Signed-off-by: Konrad Dybcio <konrad.dybcio@...ainline.org>
>>> ---
>> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
>>
>> Sorry, bit messy revisiting old patches before the email change..
>>
>> Konrad
>>> Depends on [1] to work properly, but won't hurt for it to land
>>> separately..
>>>
>>> [1] https://patchwork.kernel.org/project/linux-arm-msm/patch/1642586079-12472-1-git-send-email-loic.poulain@linaro.org/
>>>
>>>  drivers/gpu/drm/msm/dsi/phy/dsi_phy.c     |  2 ++
>>>  drivers/gpu/drm/msm/dsi/phy/dsi_phy.h     |  1 +
>>>  drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c | 20 ++++++++++++++++++++
>>>  3 files changed, 23 insertions(+)
>>>
>>> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
>>> index cbe669fca26d..57445a5dc816 100644
>>> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
>>> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
>>> @@ -569,6 +569,8 @@ static const struct of_device_id dsi_phy_dt_match[] = {
>>>         .data = &dsi_phy_7nm_8150_cfgs },
>>>       { .compatible = "qcom,sc7280-dsi-phy-7nm",
>>>         .data = &dsi_phy_7nm_7280_cfgs },
>>> +     { .compatible = "qcom,sm6375-dsi-phy-7nm",
>>> +       .data = &dsi_phy_7nm_6375_cfgs },
>>>       { .compatible = "qcom,sm8350-dsi-phy-5nm",
>>>         .data = &dsi_phy_5nm_8350_cfgs },
>>>       { .compatible = "qcom,sm8450-dsi-phy-5nm",
>>> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
>>> index 5f0b1c9b09ef..c849bfd7494e 100644
>>> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
>>> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
>>> @@ -55,6 +55,7 @@ extern const struct msm_dsi_phy_cfg dsi_phy_14nm_8953_cfgs;
>>>  extern const struct msm_dsi_phy_cfg dsi_phy_10nm_cfgs;
>>>  extern const struct msm_dsi_phy_cfg dsi_phy_10nm_8998_cfgs;
>>>  extern const struct msm_dsi_phy_cfg dsi_phy_7nm_cfgs;
>>> +extern const struct msm_dsi_phy_cfg dsi_phy_7nm_6375_cfgs;
>>>  extern const struct msm_dsi_phy_cfg dsi_phy_7nm_8150_cfgs;
>>>  extern const struct msm_dsi_phy_cfg dsi_phy_7nm_7280_cfgs;
>>>  extern const struct msm_dsi_phy_cfg dsi_phy_5nm_8350_cfgs;
>>> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
>>> index af5c952c6ad0..3b1ed02f644d 100644
>>> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
>>> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
>>> @@ -1152,6 +1152,26 @@ const struct msm_dsi_phy_cfg dsi_phy_7nm_cfgs = {
>>>       .quirks = DSI_PHY_7NM_QUIRK_V4_1,
>>>  };
>>>
>>> +const struct msm_dsi_phy_cfg dsi_phy_7nm_6375_cfgs = {
>>> +     .has_phy_lane = true,
> 
> Any regulators here?
Nope, looks like 7nm also deserves a "don't require vdds-supply"
patch, gonna send it right away..

Konrad
> 
>>> +     .ops = {
>>> +             .enable = dsi_7nm_phy_enable,
>>> +             .disable = dsi_7nm_phy_disable,
>>> +             .pll_init = dsi_pll_7nm_init,
>>> +             .save_pll_state = dsi_7nm_pll_save_state,
>>> +             .restore_pll_state = dsi_7nm_pll_restore_state,
>>> +     },
>>> +     .min_pll_rate = 600000000UL,
>>> +#ifdef CONFIG_64BIT
>>> +     .max_pll_rate = 5000000000ULL,
>>> +#else
>>> +     .max_pll_rate = ULONG_MAX,
>>> +#endif
>>> +     .io_start = { 0x5e94400 },
>>> +     .num_dsi_phy = 1,
>>> +     .quirks = DSI_PHY_7NM_QUIRK_V4_1,
>>> +};
>>> +
>>>  const struct msm_dsi_phy_cfg dsi_phy_7nm_8150_cfgs = {
>>>       .has_phy_lane = true,
>>>       .regulator_data = dsi_phy_7nm_36mA_regulators,
> 
> 
>