linux-kernel - Re: [v1 2/3] drm/msm/dsi: Add PHY configuration for SC7280

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Message-ID: <7a3facb5-d118-f81b-65f8-381b0d56a23b@linaro.org>
Date:   Mon, 31 May 2021 20:57:07 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Rajeev Nandan <rajeevny@...eaurora.org>,
        dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, sean@...rly.run, robdclark@...il.com,
        robh+dt@...nel.org, abhinavk@...eaurora.org,
        kalyan_t@...eaurora.org, mkrishn@...eaurora.org, jonathan@...ek.ca
Subject: Re: [v1 2/3] drm/msm/dsi: Add PHY configuration for SC7280

On 31/05/2021 16:33, Rajeev Nandan wrote:
> The SC7280 SoC uses the 7nm (V4.1) DSI PHY driver with
> different enable|disable regulator loads.
> 
> Signed-off-by: Rajeev Nandan <rajeevny@...eaurora.org>
> ---
>   drivers/gpu/drm/msm/Kconfig               |  6 +++---
>   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 | 22 ++++++++++++++++++++++
>   4 files changed, 28 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig
> index 10f693e..7c9d9f1 100644
> --- a/drivers/gpu/drm/msm/Kconfig
> +++ b/drivers/gpu/drm/msm/Kconfig
> @@ -114,9 +114,9 @@ config DRM_MSM_DSI_10NM_PHY
>   	  Choose this option if DSI PHY on SDM845 is used on the platform.
>   
>   config DRM_MSM_DSI_7NM_PHY
> -	bool "Enable DSI 7nm PHY driver in MSM DRM (used by SM8150/SM8250)"
> +	bool "Enable DSI 7nm PHY driver in MSM DRM"
>   	depends on DRM_MSM_DSI
>   	default y
>   	help
> -	  Choose this option if DSI PHY on SM8150/SM8250 is used on the
> -	  platform.
> +	  Choose this option if DSI PHY on SM8150/SM8250/SC7280 is used on
> +	  the platform.
> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
> index ff7f2ec..2770783 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
> @@ -593,6 +593,8 @@ static const struct of_device_id dsi_phy_dt_match[] = {
>   	  .data = &dsi_phy_7nm_cfgs },
>   	{ .compatible = "qcom,dsi-phy-7nm-8150",
>   	  .data = &dsi_phy_7nm_8150_cfgs },
> +	{ .compatible = "qcom,dsi-phy-7nm-7280",
> +	  .data = &dsi_phy_7nm_7280_cfgs },
>   #endif
>   	{}
>   };
> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
> index 94a77ac..bc91dc8 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
> @@ -51,6 +51,7 @@ 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_8150_cfgs;
> +extern const struct msm_dsi_phy_cfg dsi_phy_7nm_7280_cfgs;
>   
>   struct msm_dsi_dphy_timing {
>   	u32 clk_zero;
> 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 e76ce40..6e30d21 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
> @@ -998,3 +998,25 @@ const struct msm_dsi_phy_cfg dsi_phy_7nm_8150_cfgs = {
>   	.io_start = { 0xae94400, 0xae96400 },
>   	.num_dsi_phy = 2,
>   };
> +
> +const struct msm_dsi_phy_cfg dsi_phy_7nm_7280_cfgs = {
> +	.has_phy_lane = true,
> +	.reg_cfg = {
> +		.num = 1,
> +		.regs = {
> +			{"vdds", 37550, 0},
> +		},
> +	},
> +	.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,
> +	.max_pll_rate = (5000000000ULL < ULONG_MAX) ? 5000000000ULL : ULONG_MAX,

Could you please follow the patch by Arnd here? 
https://lore.kernel.org/linux-arm-msm/20210514213032.575161-1-arnd@kernel.org/



> +	.io_start = { 0xae94400, 0xae96400 },
> +	.num_dsi_phy = 2,

Judging from the next patch, you have one DSI host and one DSI PHY. 
Could you please correct io_start / num_dsi_phy here?

> +	.quirks = DSI_PHY_7NM_QUIRK_V4_1,
> +};


With these two issues fixed:

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>


-- 
With best wishes
Dmitry