Re: [PATCH v6 2/6] drm/rockchip/dsi: dw-mipi: support RK3399 mipi dsi

Sean Paul
2017-02-08T16:11:28Z

On Wed, Feb 08, 2017 at 10:25:18AM +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.
>

Reviewed-by: Sean Paul <seanpaul@chromium.org>

> Signed-off-by: Chris Zhong <zyw@rock-chips.com>
> Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
>
> ---
>
> Changes in v6:
> - no need check phy_cfg_clk before enable/disable
>
> 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 | 72 +++++++++++++++++++++++++++++-----
> 1 file changed, 62 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> index 3f24333..8f60b89 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;
> @@ -425,6 +439,12 @@ 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);
>
> + 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 |
> @@ -481,17 +501,18 @@ 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:
> + clk_disable_unprepare(dsi->phy_cfg_clk);
>
> return ret;
> }
> @@ -960,6 +981,7 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
> {
> struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
> struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
> + 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;
> int ret;
> @@ -985,6 +1007,10 @@ 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(mode);
>
> @@ -998,11 +1024,11 @@ 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");
> }
>
> @@ -1161,14 +1187,29 @@ 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 */ }
> };
> @@ -1248,6 +1289,17 @@ 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
>
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--
Sean Paul, Software Engineer, Google / Chromium OS