[patch v4 2/9] rockchip: video: edp: Add rk3399 support

Arnaud Patard
2021-03-05T10:27:47Z

According to linux commit "drm/rockchip: analogix_dp: add rk3399 eDP
support" (82872e42bb1501dd9e60ca430f4bae45a469aa64), rk3288 and rk3399
eDP IPs are nearly the same, the difference is in the grf register
(SOC_CON6 versus SOC_CON20). So, change the code to use the right
register on each IP.

The clocks don't seem to be the same, the eDP clock is not at index 1
on rk3399, so don't try changing the clock at index 1 to rate 0 on
rk3399.

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
Index: u-boot/drivers/video/rockchip/rk_edp.c
===================================================================
--- u-boot.orig/drivers/video/rockchip/rk_edp.c
+++ u-boot/drivers/video/rockchip/rk_edp.c
@@ -17,11 +17,10 @@
#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/arch-rockchip/clock.h>
+#include <asm/arch-rockchip/hardware.h>
#include <asm/arch-rockchip/edp_rk3288.h>
#include <asm/arch-rockchip/grf_rk3288.h>
-#include <asm/arch-rockchip/hardware.h>
-#include <dt-bindings/clock/rk3288-cru.h>
-#include <linux/delay.h>
+#include <asm/arch-rockchip/grf_rk3399.h>

#define MAX_CR_LOOP 5
#define MAX_EQ_LOOP 5
@@ -37,18 +36,42 @@ static const char * const pre_emph_names
#define DP_VOLTAGE_MAX DP_TRAIN_VOLTAGE_SWING_1200
#define DP_PRE_EMPHASIS_MAX DP_TRAIN_PRE_EMPHASIS_9_5

+#define RK3288_GRF_SOC_CON6 0x025c
+#define RK3288_GRF_SOC_CON12 0x0274
+#define RK3399_GRF_SOC_CON20 0x6250
+#define RK3399_GRF_SOC_CON25 0x6264
+
+enum rockchip_dp_types {
+ RK3288_DP = 0,
+ RK3399_EDP
+};
+
+struct rockchip_dp_data {
+ unsigned long reg_vop_big_little;
+ unsigned long reg_vop_big_little_sel;
+ unsigned long reg_ref_clk_sel;
+ unsigned long ref_clk_sel_bit;
+ enum rockchip_dp_types chip_type;
+};
+
struct rk_edp_priv {
struct rk3288_edp *regs;
- struct rk3288_grf *grf;
+ void *grf;
struct udevice *panel;
struct link_train link_train;
u8 train_set[4];
};

-static void rk_edp_init_refclk(struct rk3288_edp *regs)
+static void rk_edp_init_refclk(struct rk3288_edp *regs, enum rockchip_dp_types chip_type)
{
writel(SEL_24M, &regs->analog_ctl_2);
- writel(REF_CLK_24M, &regs->pll_reg_1);
+ u32 reg;
+
+ reg = REF_CLK_24M;
+ if (chip_type == RK3288_DP)
+ reg ^= REF_CLK_MASK;
+ writel(reg, &regs->pll_reg_1);
+

writel(LDO_OUTPUT_V_SEL_145 | KVCO_DEFALUT | CHG_PUMP_CUR_SEL_5US |
V2L_CUR_SEL_1MA, &regs->pll_reg_2);
@@ -1029,6 +1052,8 @@ static int rk_edp_probe(struct udevice *
struct display_plat *uc_plat = dev_get_uclass_plat(dev);
struct rk_edp_priv *priv = dev_get_priv(dev);
struct rk3288_edp *regs = priv->regs;
+ struct rockchip_dp_data *edp_data = (struct rockchip_dp_data *)dev_get_driver_data(dev);
+
struct clk clk;
int ret;

@@ -1043,16 +1068,17 @@ static int rk_edp_probe(struct udevice *
int vop_id = uc_plat->source_id;
debug("%s, uc_plat=%p, vop_id=%u\n", __func__, uc_plat, vop_id);

- ret = clk_get_by_index(dev, 1, &clk);
- if (ret >= 0) {
- ret = clk_set_rate(&clk, 0);
- clk_free(&clk);
- }
- if (ret) {
- debug("%s: Failed to set EDP clock: ret=%d\n", __func__, ret);
- return ret;
+ if (edp_data->chip_type == RK3288_DP) {
+ ret = clk_get_by_index(dev, 1, &clk);
+ if (ret >= 0) {
+ ret = clk_set_rate(&clk, 0);
+ clk_free(&clk);
+ }
+ if (ret) {
+ debug("%s: Failed to set EDP clock: ret=%d\n", __func__, ret);
+ return ret;
+ }
}
-
ret = clk_get_by_index(uc_plat->src_dev, 0, &clk);
if (ret >= 0) {
ret = clk_set_rate(&clk, 192000000);
@@ -1065,15 +1091,17 @@ static int rk_edp_probe(struct udevice *
}

/* grf_edp_ref_clk_sel: from internal 24MHz or 27MHz clock */
- rk_setreg(&priv->grf->soc_con12, 1 << 4);
+ rk_setreg(priv->grf + edp_data->reg_ref_clk_sel,
+ edp_data->ref_clk_sel_bit);

/* select epd signal from vop0 or vop1 */
- rk_clrsetreg(&priv->grf->soc_con6, (1 << 5),
- (vop_id == 1) ? (1 << 5) : (0 << 5));
+ rk_clrsetreg(priv->grf + edp_data->reg_vop_big_little,
+ edp_data->reg_vop_big_little_sel,
+ (vop_id == 1) ? edp_data->reg_vop_big_little_sel : 0);

rockchip_edp_wait_hpd(priv);

- rk_edp_init_refclk(regs);
+ rk_edp_init_refclk(regs, edp_data->chip_type);
rk_edp_init_interrupt(regs);
rk_edp_enable_sw_function(regs);
ret = rk_edp_init_analog_func(regs);
@@ -1089,8 +1117,25 @@ static const struct dm_display_ops dp_ro
.enable = rk_edp_enable,
};

+static const struct rockchip_dp_data rk3399_edp = {
+ .reg_vop_big_little = RK3399_GRF_SOC_CON20,
+ .reg_vop_big_little_sel = BIT(5),
+ .reg_ref_clk_sel = RK3399_GRF_SOC_CON25,
+ .ref_clk_sel_bit = BIT(11),
+ .chip_type = RK3399_EDP,
+};
+
+static const struct rockchip_dp_data rk3288_dp = {
+ .reg_vop_big_little = RK3288_GRF_SOC_CON6,
+ .reg_vop_big_little_sel = BIT(5),
+ .reg_ref_clk_sel = RK3288_GRF_SOC_CON12,
+ .ref_clk_sel_bit = BIT(4),
+ .chip_type = RK3288_DP,
+};
+
static const struct udevice_id rockchip_dp_ids[] = {
- { .compatible = "rockchip,rk3288-edp" },
+ { .compatible = "rockchip,rk3288-edp", .data = (ulong)&rk3288_dp },
+ { .compatible = "rockchip,rk3399-edp", .data = (ulong)&rk3399_edp },
{ }
};

Index: u-boot/arch/arm/include/asm/arch-rockchip/edp_rk3288.h
===================================================================
--- u-boot.orig/arch/arm/include/asm/arch-rockchip/edp_rk3288.h
+++ u-boot/arch/arm/include/asm/arch-rockchip/edp_rk3288.h
@@ -232,8 +232,9 @@ check_member(rk3288_edp, pll_reg_5, 0xa0
#define PD_CH0 (0x1 << 0)

/* pll_reg_1 */
-#define REF_CLK_24M (0x1 << 1)
-#define REF_CLK_27M (0x0 << 1)
+#define REF_CLK_24M (0x1 << 0)
+#define REF_CLK_27M (0x0 << 0)
+#define REF_CLK_MASK (0x1 << 0)

/* line_map */
#define LANE3_MAP_LOGIC_LANE_0 (0x0 << 6)