Message-ID: <20170207161525.GH15150@art_vandelay>
Date:   Tue, 7 Feb 2017 11:15:25 -0500
From:   Sean Paul <seanpaul@...omium.org>
To:     Chris Zhong <zyw@...k-chips.com>
Cc:     john@...anate.com, dianders@...omium.org, tfiga@...omium.org,
        heiko@...ech.de, yzq@...k-chips.com, mark.rutland@....com,
        devicetree@...r.kernel.org, robh+dt@...nel.org,
        galak@...eaurora.org, pawel.moll@....com, seanpaul@...omium.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-rockchip@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v5 2/6] drm/rockchip/dsi: dw-mipi: support RK3399 mipi dsi

On Sun, Feb 05, 2017 at 11:54:10AM +0800, Chris Zhong wrote:
> The vopb/vopl switch register of RK3399 mipi is different from RK3288,
> the default setting for mipi dsi mode is different too, so add a
> of_device_id structure to distinguish them, and make sure set the
> correct mode before mipi phy init.
> 
> Signed-off-by: Chris Zhong <zyw@...k-chips.com>
> Signed-off-by: Mark Yao <mark.yao@...k-chips.com>
> 
> ---
> 
> Changes in v5:
> - check the error of phy_cfg_clk in dw_mipi_dsi_bind
> 
> Changes in v4:
> - remove the unrelated change
> 
> Changes in v3:
> - base on John Keeping's patch series
> 
>  drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 75 +++++++++++++++++++++++++++++-----
>  1 file changed, 65 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> index 45af890..7d337e2 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> @@ -29,9 +29,17 @@
>  
>  #define DRIVER_NAME    "dw-mipi-dsi"
>  
> -#define GRF_SOC_CON6                    0x025c
> -#define DSI0_SEL_VOP_LIT                (1 << 6)
> -#define DSI1_SEL_VOP_LIT                (1 << 9)
> +#define RK3288_GRF_SOC_CON6		0x025c
> +#define RK3288_DSI0_SEL_VOP_LIT		BIT(6)
> +#define RK3288_DSI1_SEL_VOP_LIT		BIT(9)
> +
> +#define RK3399_GRF_SOC_CON19		0x6250
> +#define RK3399_DSI0_SEL_VOP_LIT		BIT(0)
> +#define RK3399_DSI1_SEL_VOP_LIT		BIT(4)
> +
> +/* disable turnrequest, turndisable, forcetxstopmode, forcerxmode */
> +#define RK3399_GRF_SOC_CON22		0x6258
> +#define RK3399_GRF_DSI_MODE		0xffff0000
>  
>  #define DSI_VERSION			0x00
>  #define DSI_PWR_UP			0x04
> @@ -265,6 +273,11 @@ enum {
>  };
>  
>  struct dw_mipi_dsi_plat_data {
> +	u32 dsi0_en_bit;
> +	u32 dsi1_en_bit;
> +	u32 grf_switch_reg;
> +	u32 grf_dsi0_mode;
> +	u32 grf_dsi0_mode_reg;
>  	unsigned int max_data_lanes;
>  	enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
>  					   struct drm_display_mode *mode);
> @@ -281,6 +294,7 @@ struct dw_mipi_dsi {
>  
>  	struct clk *pllref_clk;
>  	struct clk *pclk;
> +	struct clk *phy_cfg_clk;
>  
>  	unsigned int lane_mbps; /* per lane */
>  	u32 channel;
> @@ -426,6 +440,14 @@ static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
>  	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLR);
>  	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
>  
> +	if (dsi->phy_cfg_clk) {

You don't need this check any longer.

> +		ret = clk_prepare_enable(dsi->phy_cfg_clk);
> +		if (ret) {
> +			dev_err(dsi->dev, "Failed to enable phy_cfg_clk\n");
> +			return ret;
> +		}
> +	}
> +
>  	dw_mipi_dsi_phy_write(dsi, 0x10, BYPASS_VCO_RANGE |
>  					 VCO_RANGE_CON_SEL(vco) |
>  					 VCO_IN_CAP_CON_LOW |
> @@ -479,17 +501,19 @@ static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
>  				 val, val & LOCK, 1000, PHY_STATUS_TIMEOUT_US);
>  	if (ret < 0) {
>  		dev_err(dsi->dev, "failed to wait for phy lock state\n");
> -		return ret;
> +		goto phy_init_end;
>  	}
>  
>  	ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS,
>  				 val, val & STOP_STATE_CLK_LANE, 1000,
>  				 PHY_STATUS_TIMEOUT_US);
> -	if (ret < 0) {
> +	if (ret < 0)
>  		dev_err(dsi->dev,
>  			"failed to wait for phy clk lane stop state\n");
> -		return ret;
> -	}
> +
> +phy_init_end:
> +	if (dsi->phy_cfg_clk)

Or this

> +		clk_disable_unprepare(dsi->phy_cfg_clk);
>  
>  	return ret;
>  }
> @@ -965,6 +989,7 @@ static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder)
>  static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
>  {
>  	struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
> +	const struct dw_mipi_dsi_plat_data *pdata = dsi->pdata;
>  	int mux = drm_of_encoder_active_endpoint_id(dsi->dev->of_node, encoder);
>  	u32 val;
>  
> @@ -985,6 +1010,10 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
>  	dw_mipi_dsi_dphy_interface_config(dsi);
>  	dw_mipi_dsi_clear_err(dsi);
>  
> +	if (pdata->grf_dsi0_mode_reg)
> +		regmap_write(dsi->grf_regmap, pdata->grf_dsi0_mode_reg,
> +			     pdata->grf_dsi0_mode);
> +
>  	dw_mipi_dsi_phy_init(dsi);
>  	dw_mipi_dsi_wait_for_two_frames(dsi);
>  
> @@ -998,11 +1027,11 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
>  	clk_disable_unprepare(dsi->pclk);
>  
>  	if (mux)
> -		val = DSI0_SEL_VOP_LIT | (DSI0_SEL_VOP_LIT << 16);
> +		val = pdata->dsi0_en_bit | (pdata->dsi0_en_bit << 16);
>  	else
> -		val = DSI0_SEL_VOP_LIT << 16;
> +		val = pdata->dsi0_en_bit << 16;
>  
> -	regmap_write(dsi->grf_regmap, GRF_SOC_CON6, val);
> +	regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);
>  	dev_dbg(dsi->dev, "vop %s output to dsi0\n", (mux) ? "LIT" : "BIG");
>  }
>  
> @@ -1162,14 +1191,29 @@ static enum drm_mode_status rk3288_mipi_dsi_mode_valid(
>  }
>  
>  static struct dw_mipi_dsi_plat_data rk3288_mipi_dsi_drv_data = {
> +	.dsi0_en_bit = RK3288_DSI0_SEL_VOP_LIT,
> +	.dsi1_en_bit = RK3288_DSI1_SEL_VOP_LIT,
> +	.grf_switch_reg = RK3288_GRF_SOC_CON6,
>  	.max_data_lanes = 4,
>  	.mode_valid = rk3288_mipi_dsi_mode_valid,
>  };
>  
> +static struct dw_mipi_dsi_plat_data rk3399_mipi_dsi_drv_data = {
> +	.dsi0_en_bit = RK3399_DSI0_SEL_VOP_LIT,
> +	.dsi1_en_bit = RK3399_DSI1_SEL_VOP_LIT,
> +	.grf_switch_reg = RK3399_GRF_SOC_CON19,
> +	.grf_dsi0_mode = RK3399_GRF_DSI_MODE,
> +	.grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
> +	.max_data_lanes = 4,
> +};
> +
>  static const struct of_device_id dw_mipi_dsi_dt_ids[] = {
>  	{
>  	 .compatible = "rockchip,rk3288-mipi-dsi",
>  	 .data = &rk3288_mipi_dsi_drv_data,
> +	}, {
> +	 .compatible = "rockchip,rk3399-mipi-dsi",
> +	 .data = &rk3399_mipi_dsi_drv_data,
>  	},
>  	{ /* sentinel */ }
>  };
> @@ -1249,6 +1293,17 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
>  		clk_disable_unprepare(dsi->pclk);
>  	}
>  
> +	dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg");
> +	if (IS_ERR(dsi->phy_cfg_clk)) {
> +		ret = PTR_ERR(dsi->phy_cfg_clk);
> +		if (ret != -ENOENT) {
> +			dev_err(dev, "Unable to get phy_cfg_clk: %d\n", ret);
> +			return ret;
> +		}
> +		dsi->phy_cfg_clk = NULL;
> +		dev_dbg(dev, "have not phy_cfg_clk\n");
> +	}
> +
>  	ret = clk_prepare_enable(dsi->pllref_clk);
>  	if (ret) {
>  		dev_err(dev, "%s: Failed to enable pllref_clk\n", __func__);
> -- 
> 2.6.3
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

-- 
Sean Paul, Software Engineer, Google / Chromium OS

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