[RESEND PATCH v7 2/7] drm/rockchip/dsi: dw-mipi: support RK3399 mipi dsi

Chris Zhong
2017-02-20T08:02:48Z

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@rock-chips.com>
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>

---

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 cc58ada..4e74681 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