Hi Nickey,
Several people already made comments on the initial version of this
patch [1], and I don't think you've caught them all here yet. I'll
repeat a few. Not sure if I've caught them all.
[1]
https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/780120
On Tue, Nov 28, 2017 at 09:13:35AM +0800, Nickey Yang wrote:
Add the ROCKCHIP DSI controller driver that uses the Synopsys DesignWare
MIPI DSI host controller bridge.
Signed-off-by: Nickey Yang <nickey.y...@rock-chips.com>
---
drivers/gpu/drm/rockchip/Kconfig | 2 +-
drivers/gpu/drm/rockchip/Makefile | 2 +-
drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 1349 -----------------------
drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c | 756 +++++++++++++
drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 2 +-
drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 2 +-
6 files changed, 760 insertions(+), 1353 deletions(-)
delete mode 100644 drivers/gpu/drm/rockchip/dw-mipi-dsi.c
create mode 100644 drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
...
diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
b/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
new file mode 100644
index 0000000..32be430
--- /dev/null
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
@@ -0,0 +1,756 @@
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author:
+ * Chris Zhong <z...@rock-chips.com>
+ * Nickey Yang <nickey.y...@rock-chips.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include <linux/clk.h>
+#include <linux/iopoll.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <drm/drmP.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/bridge/dw_mipi_dsi.h>
+#include <video/mipi_display.h>
+#include <linux/regmap.h>
+#include <drm/drm_of.h>
+#include <linux/mfd/syscon.h>
+
+#include "rockchip_drm_drv.h"
+#include "rockchip_drm_vop.h"
+
+#define DSI_PHY_TST_CTRL0 0xb4
+#define PHY_TESTCLK BIT(1)
+#define PHY_UNTESTCLK 0
+#define PHY_TESTCLR BIT(0)
+#define PHY_UNTESTCLR 0
+
+#define DSI_PHY_TST_CTRL1 0xb8
+#define PHY_TESTEN BIT(16)
+#define PHY_UNTESTEN 0
+#define PHY_TESTDOUT(n) (((n) & 0xff) << 8)
+#define PHY_TESTDIN(n) (((n) & 0xff) << 0)
+
+#define BYPASS_VCO_RANGE BIT(7)
+#define VCO_RANGE_CON_SEL(val) (((val) & 0x7) << 3)
+#define VCO_IN_CAP_CON_DEFAULT (0x0 << 1)
+#define VCO_IN_CAP_CON_LOW (0x1 << 1)
+#define VCO_IN_CAP_CON_HIGH (0x2 << 1)
+#define REF_BIAS_CUR_SEL BIT(0)
+
+#define CP_CURRENT_3UA 0x1
+#define CP_CURRENT_4_5UA 0x2
+#define CP_CURRENT_7_5UA 0x6
+#define CP_CURRENT_6UA 0x9
+#define CP_CURRENT_12UA 0xb
+#define CP_CURRENT_SEL(val) ((val) & 0xf)
+#define CP_PROGRAM_EN BIT(7)
+
+#define LPF_RESISTORS_15_5KOHM 0x1
+#define LPF_RESISTORS_13KOHM 0x2
+#define LPF_RESISTORS_11_5KOHM 0x4
+#define LPF_RESISTORS_10_5KOHM 0x8
+#define LPF_RESISTORS_8KOHM 0x10
+#define LPF_PROGRAM_EN BIT(6)
+#define LPF_RESISTORS_SEL(val) ((val) & 0x3f)
+
+#define HSFREQRANGE_SEL(val) (((val) & 0x3f) << 1)
+
+#define INPUT_DIVIDER(val) (((val) - 1) & 0x7f)
+#define LOW_PROGRAM_EN 0
+#define HIGH_PROGRAM_EN BIT(7)
+#define LOOP_DIV_LOW_SEL(val) (((val) - 1) & 0x1f)
+#define LOOP_DIV_HIGH_SEL(val) ((((val) - 1) >> 5) & 0xf)
+#define PLL_LOOP_DIV_EN BIT(5)
+#define PLL_INPUT_DIV_EN BIT(4)
+
+#define POWER_CONTROL BIT(6)
+#define INTERNAL_REG_CURRENT BIT(3)
+#define BIAS_BLOCK_ON BIT(2)
+#define BANDGAP_ON BIT(0)
+
+#define TER_RESISTOR_HIGH BIT(7)
+#define TER_RESISTOR_LOW 0
+#define LEVEL_SHIFTERS_ON BIT(6)
+#define TER_CAL_DONE BIT(5)
+#define SETRD_MAX (0x7 << 2)
+#define POWER_MANAGE BIT(1)
+#define TER_RESISTORS_ON BIT(0)
+
+#define BIASEXTR_SEL(val) ((val) & 0x7)
+#define BANDGAP_SEL(val) ((val) & 0x7)
+#define TLP_PROGRAM_EN BIT(7)
+#define THS_PRE_PROGRAM_EN BIT(7)
+#define THS_ZERO_PROGRAM_EN BIT(6)
+
+#define PLL_BIAS_CUR_SEL_CAP_VCO_CONTROL 0x10
+#define PLL_CP_CONTROL_PLL_LOCK_BYPASS 0x11
+#define PLL_LPF_AND_CP_CONTROL 0x12
+#define PLL_INPUT_DIVIDER_RATIO 0x17
+#define PLL_LOOP_DIVIDER_RATIO 0x18
+#define PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL 0x19
+#define BANDGAP_AND_BIAS_CONTROL 0x20
+#define TERMINATION_RESISTER_CONTROL 0x21
+#define AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY 0x22
+#define HS_RX_CONTROL_OF_LANE_0 0x44
+#define HS_TX_CLOCK_LANE_REQUEST_STATE_TIME_CONTROL 0x60
+#define HS_TX_CLOCK_LANE_PREPARE_STATE_TIME_CONTROL 0x61
+#define HS_TX_CLOCK_LANE_HS_ZERO_STATE_TIME_CONTROL 0x62
+#define HS_TX_CLOCK_LANE_TRAIL_STATE_TIME_CONTROL 0x63
+#define HS_TX_CLOCK_LANE_EXIT_STATE_TIME_CONTROL 0x64
+#define HS_TX_CLOCK_LANE_POST_TIME_CONTROL 0x65
+#define HS_TX_DATA_LANE_REQUEST_STATE_TIME_CONTROL 0x70
+#define HS_TX_DATA_LANE_PREPARE_STATE_TIME_CONTROL 0x71
+#define HS_TX_DATA_LANE_HS_ZERO_STATE_TIME_CONTROL 0x72
+#define HS_TX_DATA_LANE_TRAIL_STATE_TIME_CONTROL 0x73
+#define HS_TX_DATA_LANE_EXIT_STATE_TIME_CONTROL 0x74
+
+#define DW_MIPI_NEEDS_PHY_CFG_CLK BIT(0)
+#define DW_MIPI_NEEDS_GRF_CLK BIT(1)
+
+#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_CON20 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 to_dsi(nm) container_of(nm, struct dw_mipi_dsi_rockchip, nm)
+
+enum {
+ BANDGAP_97_07,
+ BANDGAP_98_05,
+ BANDGAP_99_02,
+ BANDGAP_100_00,
+ BANDGAP_93_17,
+ BANDGAP_94_15,
+ BANDGAP_95_12,
+ BANDGAP_96_10,
+};
+
+enum {
+ BIASEXTR_87_1,
+ BIASEXTR_91_5,
+ BIASEXTR_95_9,
+ BIASEXTR_100,
+ BIASEXTR_105_94,
+ BIASEXTR_111_88,
+ BIASEXTR_118_8,
+ BIASEXTR_127_7,
+};
+
+struct rockchip_dw_dsi_chip_data {
+ u32 dsi0_en_bit;
+ u32 dsi1_en_bit;
+ u32 grf_switch_reg;
+ u32 grf_dsi0_mode;
+ u32 grf_dsi0_mode_reg;
+ unsigned int flags;
+ unsigned int max_data_lanes;
+};
+
+struct dw_mipi_dsi_rockchip {
+ struct device *dev;
+ struct drm_encoder encoder;
+ void __iomem *base;
+
+ struct regmap *grf_regmap;
+ struct clk *pllref_clk;
+ struct clk *grf_clk;
+ struct clk *phy_cfg_clk;
+
+ unsigned int lane_mbps; /* per lane */
+ u16 input_div;
+ u16 feedback_div;
+ u32 format;
+
+ const struct rockchip_dw_dsi_chip_data *cdata;
+ struct dw_mipi_dsi_plat_data pdata;
+};
+
+struct dphy_pll_parameter_map {
+ unsigned int max_mbps;
+ u8 hsfreqrange;
+ u8 icpctrl;
+ u8 lpfctrl;
+};
+
+/* The table is based on 27MHz DPHY pll reference clock. */
+static const struct dphy_pll_parameter_map dppa_map[] = {
+ { 89, 0x00, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM},
+ { 99, 0x10, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM},
+ { 109, 0x20, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM},
+ { 129, 0x01, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM},
+ { 139, 0x11, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM},
+ { 149, 0x21, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM},
+ { 169, 0x02, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM},
+ { 179, 0x12, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM},
+ { 199, 0x22, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM},
+ { 219, 0x03, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM},
+ { 239, 0x13, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM},
+ { 249, 0x23, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM},
+ { 269, 0x04, CP_CURRENT_6UA, LPF_RESISTORS_11_5KOHM},
+ { 299, 0x14, CP_CURRENT_6UA, LPF_RESISTORS_11_5KOHM},
+ { 329, 0x05, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM},
+ { 359, 0x15, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM},
+ { 399, 0x25, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM},
+ { 449, 0x06, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM},
+ { 499, 0x16, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM},
+ { 549, 0x07, CP_CURRENT_7_5UA, LPF_RESISTORS_10_5KOHM},
+ { 599, 0x17, CP_CURRENT_7_5UA, LPF_RESISTORS_10_5KOHM},
+ { 649, 0x08, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM},
+ { 699, 0x18, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM},
+ { 749, 0x09, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM},
+ { 799, 0x19, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM},
+ { 849, 0x29, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM},
+ { 899, 0x39, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM},
+ { 949, 0x0a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM},
+ { 999, 0x1a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM},
+ {1049, 0x2a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM},
+ {1099, 0x3a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM},
+ {1149, 0x0b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM},
+ {1199, 0x1b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM},
+ {1249, 0x2b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM},
+ {1299, 0x3b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM},
+ {1349, 0x0c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM},
+ {1399, 0x1c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM},
+ {1449, 0x2c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM},
+ {1500, 0x3c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM}
+};
+
+static int max_mbps_to_parameter(unsigned int max_mbps)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(dppa_map); i++)
+ if (dppa_map[i].max_mbps >= max_mbps)
+ return i;
+
+ return -EINVAL;
+}
+
+static inline void dsi_write(struct dw_mipi_dsi_rockchip *dsi, u32 reg, u32
val)
+{
+ writel(val, dsi->base + reg);
+}
+
+static inline u32 dsi_read(struct dw_mipi_dsi_rockchip *dsi, u32 reg)
+{
+ return readl(dsi->base + reg);
+}
+
+static inline void dsi_set(struct dw_mipi_dsi_rockchip *dsi, u32 reg, u32 mask)
+{
+ dsi_write(dsi, reg, dsi_read(dsi, reg) | mask);
+}
+
+static inline void dsi_update_bits(struct dw_mipi_dsi_rockchip *dsi, u32 reg,
+ u32 mask, u32 val)
+{
+ dsi_write(dsi, reg, (dsi_read(dsi, reg) & ~mask) | val);
+}
+
+static void dw_mipi_dsi_phy_write(struct dw_mipi_dsi_rockchip *dsi,
+ u8 test_code,
+ u8 test_data)
+{
+ /*
+ * With the falling edge on TESTCLK, the TESTDIN[7:0] signal content
+ * is latched internally as the current test code. Test data is
+ * programmed internally by rising edge on TESTCLK.
+ */
+ dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
+
+ dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_TESTEN | PHY_TESTDOUT(0) |
+ PHY_TESTDIN(test_code));
+
+ dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLK | PHY_UNTESTCLR);
+
+ dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_UNTESTEN | PHY_TESTDOUT(0) |
+ PHY_TESTDIN(test_data));
+
+ dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
+}
+
+/**
+ * ns2bc - Nanoseconds to byte clock cycles
+ */
+static inline unsigned int ns2bc(struct dw_mipi_dsi_rockchip *dsi, int ns)
+{
+ return DIV_ROUND_UP(ns * dsi->lane_mbps / 8, 1000);
+}
+
+/**
+ * ns2ui - Nanoseconds to UI time periods
+ */
+static inline unsigned int ns2ui(struct dw_mipi_dsi_rockchip *dsi, int ns)
+{
+ return DIV_ROUND_UP(ns * dsi->lane_mbps, 1000);
+}
+
+static int dw_mipi_dsi_phy_init(void *priv_data)
+{
+ struct dw_mipi_dsi_rockchip *dsi = priv_data;
+ int ret, i, vco;
+
+ vco = (dsi->lane_mbps < 200) ? 0 : (dsi->lane_mbps + 100) / 200;
+
+ i = max_mbps_to_parameter(dsi->lane_mbps);
+ if (i < 0) {
+ DRM_DEV_ERROR(dsi->dev,
+ "failed to get parameter for %dmbps clock\n",
+ dsi->lane_mbps);
+ return i;
+ }
+
+ ret = clk_prepare_enable(dsi->phy_cfg_clk);
+ if (ret) {
+ DRM_DEV_ERROR(dsi->dev, "Failed to enable phy_cfg_clk\n");
+ return ret;
+ }
+
+ dw_mipi_dsi_phy_write(dsi, PLL_BIAS_CUR_SEL_CAP_VCO_CONTROL,
+ BYPASS_VCO_RANGE |
+ VCO_RANGE_CON_SEL(vco) |
+ VCO_IN_CAP_CON_LOW |
+ REF_BIAS_CUR_SEL);
+
+ dw_mipi_dsi_phy_write(dsi, PLL_CP_CONTROL_PLL_LOCK_BYPASS,
+ CP_CURRENT_SEL(dppa_map[i].icpctrl));
+ dw_mipi_dsi_phy_write(dsi, PLL_LPF_AND_CP_CONTROL,
+ CP_PROGRAM_EN | LPF_PROGRAM_EN |
+ LPF_RESISTORS_SEL(dppa_map[i].lpfctrl));
+
+ dw_mipi_dsi_phy_write(dsi, HS_RX_CONTROL_OF_LANE_0,
+ HSFREQRANGE_SEL(dppa_map[i].hsfreqrange));
+
+ dw_mipi_dsi_phy_write(dsi, PLL_INPUT_DIVIDER_RATIO,
+ INPUT_DIVIDER(dsi->input_div));
+ dw_mipi_dsi_phy_write(dsi, PLL_LOOP_DIVIDER_RATIO,
+ LOOP_DIV_LOW_SEL(dsi->feedback_div) |
+ LOW_PROGRAM_EN);
+ /*
+ * We need set PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL immediately
+ * to make the configrued LSB effective according to IP simulation
"configured"
+ * and lab test results.
+ * Only in this way can we get correct mipi phy pll frequency.
+ */
+ dw_mipi_dsi_phy_write(dsi, PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL,
+ PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
+ dw_mipi_dsi_phy_write(dsi, PLL_LOOP_DIVIDER_RATIO,
+ LOOP_DIV_HIGH_SEL(dsi->feedback_div) |
+ HIGH_PROGRAM_EN);
+ dw_mipi_dsi_phy_write(dsi, PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL,
+ PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
+
+ dw_mipi_dsi_phy_write(dsi, AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY,
+ LOW_PROGRAM_EN | BIASEXTR_SEL(BIASEXTR_127_7));
+ dw_mipi_dsi_phy_write(dsi, AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY,
+ HIGH_PROGRAM_EN | BANDGAP_SEL(BANDGAP_96_10));
+
+ dw_mipi_dsi_phy_write(dsi, BANDGAP_AND_BIAS_CONTROL,
+ POWER_CONTROL | INTERNAL_REG_CURRENT |
+ BIAS_BLOCK_ON | BANDGAP_ON);
+
+ dw_mipi_dsi_phy_write(dsi, TERMINATION_RESISTER_CONTROL,
+ TER_RESISTOR_LOW | TER_CAL_DONE |
+ SETRD_MAX | TER_RESISTORS_ON);
+ dw_mipi_dsi_phy_write(dsi, TERMINATION_RESISTER_CONTROL,
+ TER_RESISTOR_HIGH | LEVEL_SHIFTERS_ON |
+ SETRD_MAX | POWER_MANAGE |
+ TER_RESISTORS_ON);
+
+ dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_REQUEST_STATE_TIME_CONTROL,
+ TLP_PROGRAM_EN | ns2bc(dsi, 500));
+ dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_PREPARE_STATE_TIME_CONTROL,
+ THS_PRE_PROGRAM_EN | ns2ui(dsi, 40));
+ dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_HS_ZERO_STATE_TIME_CONTROL,
+ THS_ZERO_PROGRAM_EN | ns2bc(dsi, 300));
+ dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_TRAIL_STATE_TIME_CONTROL,
+ THS_PRE_PROGRAM_EN | ns2ui(dsi, 100));
+ dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_EXIT_STATE_TIME_CONTROL,
+ BIT(5) | ns2bc(dsi, 100));
+ dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_POST_TIME_CONTROL,
+ BIT(5) | (ns2bc(dsi, 60) + 7));
+
+ dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_REQUEST_STATE_TIME_CONTROL,
+ TLP_PROGRAM_EN | ns2bc(dsi, 500));
+ dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_PREPARE_STATE_TIME_CONTROL,
+ THS_PRE_PROGRAM_EN | (ns2ui(dsi, 50) + 20));
+ dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_HS_ZERO_STATE_TIME_CONTROL,
+ THS_ZERO_PROGRAM_EN | (ns2bc(dsi, 140) + 2));
+ dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_TRAIL_STATE_TIME_CONTROL,
+ THS_PRE_PROGRAM_EN | (ns2ui(dsi, 60) + 8));
+ dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_EXIT_STATE_TIME_CONTROL,
+ BIT(5) | ns2bc(dsi, 100));
+
+ clk_disable_unprepare(dsi->phy_cfg_clk);
+
+ return ret;
+}
+
+static int
+dw_mipi_dsi_get_lane_mbps(void *priv_data, struct drm_display_mode *mode,
+ unsigned long mode_flags, u32 lanes, u32 format,
+ unsigned int *lane_mbps)
+{
+ struct dw_mipi_dsi_rockchip *dsi = priv_data;
+ int bpp;
+ unsigned long mpclk, tmp;
+ unsigned int target_mbps = 1000;
+ unsigned int max_mbps = dppa_map[ARRAY_SIZE(dppa_map) - 1].max_mbps;
+ unsigned long best_freq = 0;
+ unsigned long fvco_min, fvco_max, fin, fout;
+ unsigned int min_prediv, max_prediv;
+ unsigned int _prediv, uninitialized_var(best_prediv);
+ unsigned long _fbdiv, uninitialized_var(best_fbdiv);
+ unsigned long min_delta = ULONG_MAX;
+
+ dsi->format = format;
+ bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
+ if (bpp < 0) {
+ DRM_DEV_ERROR(dsi->dev,
+ "failed to get bpp for pixel format %d\n",
+ dsi->format);
+ return bpp;
+ }
+
+ mpclk = DIV_ROUND_UP(mode->clock, MSEC_PER_SEC);
+ if (mpclk) {
+ /* take 1 / 0.8, since mbps must big than bandwidth of RGB */
+ tmp = mpclk * (bpp / lanes) * 10 / 8;
+ if (tmp < max_mbps)
+ target_mbps = tmp;
+ else
+ DRM_DEV_ERROR(dsi->dev,
+ "DPHY clock frequency is out of range\n");
+ }
+
+ fin = clk_get_rate(dsi->pllref_clk);
+ fout = target_mbps * USEC_PER_SEC;
+
+ /* constraint: 5Mhz <= Fref / N <= 40MHz */
+ min_prediv = DIV_ROUND_UP(fin, 40 * USEC_PER_SEC);
+ max_prediv = fin / (5 * USEC_PER_SEC);
+
+ /* constraint: 80MHz <= Fvco <= 1500Mhz */
+ fvco_min = 80 * USEC_PER_SEC;
+ fvco_max = 1500 * USEC_PER_SEC;
+
+ for (_prediv = min_prediv; _prediv <= max_prediv; _prediv++) {
+ u64 tmp;
+ u32 delta;
+ /* Fvco = Fref * M / N */
+ tmp = (u64)fout * _prediv;
+ do_div(tmp, fin);
+ _fbdiv = tmp;
+ /*
+ * Due to the use of a "by 2 pre-scaler," the range of the
+ * feedback multiplication value M is limited to even division
+ * numbers, and m must be greater than 6, less than 512.
+ */
+ if (_fbdiv < 6 || _fbdiv > 512)
+ continue;
+
+ _fbdiv += _fbdiv % 2;
+
+ tmp = (u64)_fbdiv * fin;
+ do_div(tmp, _prediv);
+ if (tmp < fvco_min || tmp > fvco_max)
+ continue;
+
+ delta = abs(fout - tmp);
+ if (delta < min_delta) {
+ best_prediv = _prediv;
+ best_fbdiv = _fbdiv;
+ min_delta = delta;
+ best_freq = tmp;
+ }
+ }
+ if (best_freq) {
+ dsi->lane_mbps = DIV_ROUND_UP(best_freq, USEC_PER_SEC);
+ *lane_mbps = dsi->lane_mbps;
+ dsi->input_div = best_prediv;
+ dsi->feedback_div = best_fbdiv;
+ } else
+ DRM_DEV_ERROR(dsi->dev, "Can not find best_freq for DPHY\n");
Return an error? Also, use braces on the 'else' if you had to use them
on the 'if'.
+
+ return 0;
+}
+
+static const struct dw_mipi_dsi_phy_ops dw_mipi_dsi_rockchip_phy_ops = {
+ .init = dw_mipi_dsi_phy_init,
+ .get_lane_mbps = dw_mipi_dsi_get_lane_mbps,
+};
+
+static struct rockchip_dw_dsi_chip_data rk3288_chip_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,
+};
+
+static struct rockchip_dw_dsi_chip_data rk3399_chip_data = {
+ .dsi0_en_bit = RK3399_DSI0_SEL_VOP_LIT,
+ .dsi1_en_bit = RK3399_DSI1_SEL_VOP_LIT,
+ .grf_switch_reg = RK3399_GRF_SOC_CON20,
+ .grf_dsi0_mode = RK3399_GRF_DSI_MODE,
+ .grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
+ .flags = DW_MIPI_NEEDS_PHY_CFG_CLK | DW_MIPI_NEEDS_GRF_CLK,
+ .max_data_lanes = 4,
+};
+
+static const struct of_device_id dw_mipi_dsi_rockchip_dt_ids[] = {
+ {
+ .compatible = "rockchip,rk3288-mipi-dsi",
+ .data = &rk3288_chip_data,
+ }, {
+ .compatible = "rockchip,rk3399-mipi-dsi",
+ .data = &rk3399_chip_data,
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dw_mipi_dsi_rockchip_dt_ids);
+
+static void dw_mipi_dsi_encoder_nop(struct drm_encoder *encoder)
+{
+ /* do nothing */
+}
As of this:
75229eca569f drm: Make drm_encoder_helper_funcs optional
these "nop" functions are actually optional. You can just completely
remove the .enable/.disable callbacks in this driver.
+
+static void dw_mipi_dsi_encoder_mode_set(struct drm_encoder *encoder,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted)
+{
+ struct dw_mipi_dsi_rockchip *dsi = to_dsi(encoder);
+ const struct rockchip_dw_dsi_chip_data *cdata = dsi->cdata;
+ int val, ret;
+
+ /*
+ * For the RK3399, the clk of grf must be enabled before writing grf
+ * register. And for RK3288 or other soc, this grf_clk must be NULL,
+ * the clk_prepare_enable return true directly.
+ */
+ ret = clk_prepare_enable(dsi->grf_clk);
+ if (ret) {
+ DRM_DEV_ERROR(dsi->dev, "Failed to enable grf_clk: %d\n", ret);
+ return;
+ }
+
+ ret = drm_of_encoder_active_endpoint_id(dsi->dev->of_node,
+ &dsi->encoder);
+ if (ret < 0)
+ return;
On failure here, you need to disable the GRF clock. Or, you could move
drm_of_encoder_active_endpoint_id() before
clk_prepare_enable(dsi->grf_clk).
+
+ val = cdata->dsi0_en_bit << 16;
+ if (ret)
+ val |= cdata->dsi0_en_bit;
+ regmap_write(dsi->grf_regmap, cdata->grf_switch_reg, val);
+
+ if (cdata->grf_dsi0_mode_reg)
+ regmap_write(dsi->grf_regmap, cdata->grf_dsi0_mode_reg,
+ cdata->grf_dsi0_mode);
+
+ clk_disable_unprepare(dsi->grf_clk);
+}
+
+static int
+dw_mipi_dsi_encoder_atomic_check(struct drm_encoder *encoder,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
+ struct dw_mipi_dsi_rockchip *dsi = to_dsi(encoder);
+
+ switch (dsi->format) {
+ case MIPI_DSI_FMT_RGB888:
+ s->output_mode = ROCKCHIP_OUT_MODE_P888;
+ break;
+ case MIPI_DSI_FMT_RGB666:
+ s->output_mode = ROCKCHIP_OUT_MODE_P666;
+ break;
+ case MIPI_DSI_FMT_RGB565:
+ s->output_mode = ROCKCHIP_OUT_MODE_P565;
+ break;
+ default:
+ WARN_ON(1);
+ return -EINVAL;
+ }
+
+ s->output_type = DRM_MODE_CONNECTOR_DSI;
+
+ return 0;
+}
+
+static const struct drm_encoder_helper_funcs
+dw_mipi_dsi_encoder_helper_funcs = {
+ .enable = dw_mipi_dsi_encoder_nop,
+ .disable = dw_mipi_dsi_encoder_nop,
+ .mode_set = dw_mipi_dsi_encoder_mode_set,
+ .atomic_check = dw_mipi_dsi_encoder_atomic_check,
+};
+
+static const struct drm_encoder_funcs dw_mipi_dsi_encoder_funcs = {
+ .destroy = drm_encoder_cleanup,
+};
+
+static int rockchip_dsi_drm_create_encoder(struct dw_mipi_dsi_rockchip *dsi,
+ struct drm_device *drm_dev)
+{
+ struct drm_encoder *encoder = &dsi->encoder;
+ int ret;
+
+ encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
+ dsi->dev->of_node);
+
+ ret = drm_encoder_init(drm_dev, encoder, &dw_mipi_dsi_encoder_funcs,
+ DRM_MODE_ENCODER_DSI, NULL);
+ if (ret) {
+ DRM_ERROR("Failed to initialize encoder with drm\n");
+ return ret;
+ }
+
+ drm_encoder_helper_add(encoder, &dw_mipi_dsi_encoder_helper_funcs);
+
+ return 0;
+}
+
+static int dw_mipi_dsi_rockchip_bind(struct device *dev,
+ struct device *master,
+ void *data)
+{
+ const struct of_device_id *of_id =
+ of_match_device(dw_mipi_dsi_rockchip_dt_ids, dev);
+ const struct rockchip_dw_dsi_chip_data *cdata = of_id->data;
+ struct dw_mipi_dsi_rockchip *dsi = dev_get_drvdata(dev);
Hmm, I see a "get_drvdata()" but no "set_drvdata()" in this driver.
Also, the bridge driver is fighting you on this one. You'll need my
patch [1] for this to make sense.
[1] https://patchwork.kernel.org/patch/10078493/
+ struct resource *res;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct drm_device *drm_dev = data;
+ struct device_node *np = dev->of_node;
+ int ret;
+
+ dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
+ if (!dsi)
+ return -ENOMEM;
+
+ dsi->cdata = cdata;
+ dsi->dev = dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ DRM_ERROR("Unable to get resource\n");
+ return -ENODEV;
+ }
+
+ dsi->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(dsi->base)) {
+ DRM_ERROR("Unable to get dsi registers\n");
+ return PTR_ERR(dsi->base);
+ }
+
+ dsi->pllref_clk = devm_clk_get(dev, "ref");
+ if (IS_ERR(dsi->pllref_clk)) {
+ ret = PTR_ERR(dsi->pllref_clk);
+ DRM_DEV_ERROR(dev,
+ "Unable to get pll reference clock: %d\n", ret);
+ return ret;
+ }
+
+ if (cdata->flags & DW_MIPI_NEEDS_PHY_CFG_CLK) {
+ dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg");
+ if (IS_ERR(dsi->phy_cfg_clk)) {
+ ret = PTR_ERR(dsi->phy_cfg_clk);
+ DRM_DEV_ERROR(dev,
+ "Unable to get phy_cfg_clk: %d\n", ret);
+ return ret;
+ }
+ }
+
+ if (cdata->flags & DW_MIPI_NEEDS_GRF_CLK) {
+ dsi->grf_clk = devm_clk_get(dev, "grf");
+ if (IS_ERR(dsi->grf_clk)) {
+ ret = PTR_ERR(dsi->grf_clk);
+ DRM_DEV_ERROR(dev, "Unable to get grf_clk: %d\n", ret);
+ return ret;
+ }
+ }
+
+ ret = clk_prepare_enable(dsi->pllref_clk);
+ if (ret) {
+ DRM_DEV_ERROR(dev,
+ "%s: Failed to enable pllref_clk\n", __func__);
+ return ret;
+ }
+
+ dsi->grf_regmap = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
+ if (IS_ERR(dsi->grf_regmap)) {
+ DRM_DEV_ERROR(dsi->dev, "Unable to get rockchip,grf\n");
+ return PTR_ERR(dsi->grf_regmap);
+ }
+
+ dsi->pdata.base = dsi->base;
+ dsi->pdata.priv_data = dsi;
+ dsi->pdata.max_data_lanes = cdata->max_data_lanes;
+ dsi->pdata.phy_ops = &dw_mipi_dsi_rockchip_phy_ops;
+
+ ret = rockchip_dsi_drm_create_encoder(dsi, drm_dev);
+ if (ret) {
+ DRM_ERROR("Failed to create drm encoder\n");
+ return ret;
+ }
+ ret = dw_mipi_dsi_bind(pdev, &dsi->encoder, &dsi->pdata);
+ if (ret) {
+ DRM_ERROR("Failed to bind\n");
+ clk_disable_unprepare(dsi->pllref_clk);
+ return ret;
+ }
+ return 0;
+}
+
+static void dw_mipi_dsi_rockchip_unbind(struct device *dev,
+ struct device *master,
+ void *data)
+{
Are you going to undo anything here? e.g., dw_mipi_dsi_unbind() and
clk_disable_unprepare(dsi->pllref_clk)?
Brian
+}
+
+static const struct component_ops dw_mipi_dsi_rockchip_ops = {
+ .bind = dw_mipi_dsi_rockchip_bind,
+ .unbind = dw_mipi_dsi_rockchip_unbind,
+};
+
+static int dw_mipi_dsi_rockchip_probe(struct platform_device *pdev)
+{
+ return component_add(&pdev->dev, &dw_mipi_dsi_rockchip_ops);
+}
+
+static int dw_mipi_dsi_rockchip_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &dw_mipi_dsi_rockchip_ops);
+
+ return 0;
+}
+
+struct platform_driver dw_mipi_dsi_rockchip_driver = {
+ .probe = dw_mipi_dsi_rockchip_probe,
+ .remove = dw_mipi_dsi_rockchip_remove,
+ .driver = {
+ .of_match_table = dw_mipi_dsi_rockchip_dt_ids,
+ .name = "dw-mipi-dsi-rockchip",
+ },
+};
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index 76d63de..d40cc39 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -462,7 +462,7 @@ static int __init rockchip_drm_init(void)
ADD_ROCKCHIP_SUB_DRIVER(cdn_dp_driver, CONFIG_ROCKCHIP_CDN_DP);
ADD_ROCKCHIP_SUB_DRIVER(dw_hdmi_rockchip_pltfm_driver,
CONFIG_ROCKCHIP_DW_HDMI);
- ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_driver,
+ ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_rockchip_driver,
CONFIG_ROCKCHIP_DW_MIPI_DSI);
ADD_ROCKCHIP_SUB_DRIVER(inno_hdmi_driver, CONFIG_ROCKCHIP_INNO_HDMI);
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
index 498dfbc..af235b2 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
@@ -66,7 +66,7 @@ void rockchip_drm_dma_detach_device(struct drm_device
*drm_dev,
extern struct platform_driver cdn_dp_driver;
extern struct platform_driver dw_hdmi_rockchip_pltfm_driver;
-extern struct platform_driver dw_mipi_dsi_driver;
+extern struct platform_driver dw_mipi_dsi_rockchip_driver;
extern struct platform_driver inno_hdmi_driver;
extern struct platform_driver rockchip_dp_driver;
extern struct platform_driver rockchip_lvds_driver;
--
1.9.1
