The bit position to configure source PLL will change on new types of PHYs. The caller should pass down this information.

Signed-off-by: Hai Li hali@codeaurora.org --- drivers/gpu/drm/msm/dsi/dsi_phy.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/msm/dsi/dsi_phy.c b/drivers/gpu/drm/msm/dsi/dsi_phy.c index bd37e61..799201e 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_phy.c +++ b/drivers/gpu/drm/msm/dsi/dsi_phy.c @@ -157,17 +157,21 @@ fail: return ret; }

-static void dsi_phy_set_src_pll(struct msm_dsi_phy *phy, int pll_id, u32 reg) +static void dsi_phy_set_src_pll(struct msm_dsi_phy *phy, int pll_id, u32 reg, + u32 bit_mask) { int phy_id = phy->id; + u32 val;

if ((phy_id >= DSI_MAX) || (pll_id >= DSI_MAX)) return;

+ val = dsi_phy_read(phy->base + reg); + if (phy->cfg->src_pll_truthtable[phy_id][pll_id]) - dsi_phy_write(phy->base + reg, 0x01); + dsi_phy_write(phy->base + reg, val | bit_mask); else - dsi_phy_write(phy->base + reg, 0x00); + dsi_phy_write(phy->base + reg, val & (~bit_mask)); }

#define S_DIV_ROUND_UP(n, d) \ @@ -389,7 +393,8 @@ static int dsi_28nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,

dsi_phy_write(base + REG_DSI_28nm_PHY_CTRL_0, 0x5f);

- dsi_phy_set_src_pll(phy, src_pll_id, REG_DSI_28nm_PHY_GLBL_TEST_CTRL); + dsi_phy_set_src_pll(phy, src_pll_id, REG_DSI_28nm_PHY_GLBL_TEST_CTRL, + DSI_28nm_PHY_GLBL_TEST_CTRL_BITCLK_HS_SEL);

return 0; } @@ -451,7 +456,8 @@ static int dsi_20nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,

dsi_phy_write(base + REG_DSI_20nm_PHY_STRENGTH_0, 0xff);

- dsi_phy_set_src_pll(phy, src_pll_id, REG_DSI_20nm_PHY_GLBL_TEST_CTRL); + dsi_phy_set_src_pll(phy, src_pll_id, REG_DSI_20nm_PHY_GLBL_TEST_CTRL, + DSI_20nm_PHY_GLBL_TEST_CTRL_BITCLK_HS_SEL);

for (i = 0; i < 4; i++) { dsi_phy_write(base + REG_DSI_20nm_PHY_LN_CFG_3(i),

This change moves each PHY type specific code into separate files.

Signed-off-by: Hai Li hali@codeaurora.org --- drivers/gpu/drm/msm/Makefile | 6 +- drivers/gpu/drm/msm/dsi/dsi_phy.c | 756 ----------------------------- drivers/gpu/drm/msm/dsi/phy/dsi_phy.c | 448 +++++++++++++++++ drivers/gpu/drm/msm/dsi/phy/dsi_phy.h | 89 ++++ drivers/gpu/drm/msm/dsi/phy/dsi_phy_20nm.c | 150 ++++++ drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c | 166 +++++++ 6 files changed, 857 insertions(+), 758 deletions(-) delete mode 100644 drivers/gpu/drm/msm/dsi/dsi_phy.c create mode 100644 drivers/gpu/drm/msm/dsi/phy/dsi_phy.c create mode 100644 drivers/gpu/drm/msm/dsi/phy/dsi_phy.h create mode 100644 drivers/gpu/drm/msm/dsi/phy/dsi_phy_20nm.c create mode 100644 drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c

diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 14d167e..30f998a 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -1,5 +1,5 @@ ccflags-y := -Iinclude/drm -Idrivers/gpu/drm/msm -ccflags-$(CONFIG_DRM_MSM_DSI_PLL) += -Idrivers/gpu/drm/msm/dsi +ccflags-$(CONFIG_DRM_MSM_DSI) += -Idrivers/gpu/drm/msm/dsi

msm-y := \ adreno/adreno_device.o \ @@ -56,7 +56,9 @@ msm-$(CONFIG_COMMON_CLK) += mdp/mdp4/mdp4_lvds_pll.o msm-$(CONFIG_DRM_MSM_DSI) += dsi/dsi.o \ dsi/dsi_host.o \ dsi/dsi_manager.o \ - dsi/dsi_phy.o \ + dsi/phy/dsi_phy.o \ + dsi/phy/dsi_phy_20nm.o \ + dsi/phy/dsi_phy_28nm.o \ mdp/mdp5/mdp5_cmd_encoder.o

msm-$(CONFIG_DRM_MSM_DSI_PLL) += dsi/pll/dsi_pll.o \ diff --git a/drivers/gpu/drm/msm/dsi/dsi_phy.c b/drivers/gpu/drm/msm/dsi/dsi_phy.c deleted file mode 100644 index 77f1efe..0000000 --- a/drivers/gpu/drm/msm/dsi/dsi_phy.c +++ /dev/null @@ -1,756 +0,0 @@ -/* - * Copyright (c) 2015, The Linux Foundation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * 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. See the - * GNU General Public License for more details. - */ - -#include <linux/platform_device.h> -#include <linux/regulator/consumer.h> - -#include "dsi.h" -#include "dsi.xml.h" - -#define dsi_phy_read(offset) msm_readl((offset)) -#define dsi_phy_write(offset, data) msm_writel((data), (offset)) - -struct dsi_phy_ops { - int (*enable)(struct msm_dsi_phy *phy, int src_pll_id, - const unsigned long bit_rate, const unsigned long esc_rate); - void (*disable)(struct msm_dsi_phy *phy); -}; - -struct dsi_phy_cfg { - enum msm_dsi_phy_type type; - struct dsi_reg_config reg_cfg; - struct dsi_phy_ops ops; - - /* Each cell {phy_id, pll_id} of the truth table indicates - * if the source PLL is on the right side of the PHY. - * Fill default H/W values in illegal cells, eg. cell {0, 1}. - */ - bool src_pll_truthtable[DSI_MAX][DSI_MAX]; -}; - -struct dsi_dphy_timing { - u32 clk_pre; - u32 clk_post; - u32 clk_zero; - u32 clk_trail; - u32 clk_prepare; - u32 hs_exit; - u32 hs_zero; - u32 hs_prepare; - u32 hs_trail; - u32 hs_rqst; - u32 ta_go; - u32 ta_sure; - u32 ta_get; -}; - -struct msm_dsi_phy { - struct platform_device *pdev; - void __iomem *base; - void __iomem *reg_base; - int id; - - struct clk *ahb_clk; - struct regulator_bulk_data supplies[DSI_DEV_REGULATOR_MAX]; - - struct dsi_dphy_timing timing; - const struct dsi_phy_cfg *cfg; - - bool regulator_ldo_mode; - - struct msm_dsi_pll *pll; -}; - -static int dsi_phy_regulator_init(struct msm_dsi_phy *phy) -{ - struct regulator_bulk_data *s = phy->supplies; - const struct dsi_reg_entry *regs = phy->cfg->reg_cfg.regs; - struct device *dev = &phy->pdev->dev; - int num = phy->cfg->reg_cfg.num; - int i, ret; - - for (i = 0; i < num; i++) - s[i].supply = regs[i].name; - - ret = devm_regulator_bulk_get(&phy->pdev->dev, num, s); - if (ret < 0) { - dev_err(dev, "%s: failed to init regulator, ret=%d\n", - __func__, ret); - return ret; - } - - for (i = 0; i < num; i++) { - if ((regs[i].min_voltage >= 0) && (regs[i].max_voltage >= 0)) { - ret = regulator_set_voltage(s[i].consumer, - regs[i].min_voltage, regs[i].max_voltage); - if (ret < 0) { - dev_err(dev, - "regulator %d set voltage failed, %d\n", - i, ret); - return ret; - } - } - } - - return 0; -} - -static void dsi_phy_regulator_disable(struct msm_dsi_phy *phy) -{ - struct regulator_bulk_data *s = phy->supplies; - const struct dsi_reg_entry *regs = phy->cfg->reg_cfg.regs; - int num = phy->cfg->reg_cfg.num; - int i; - - DBG(""); - for (i = num - 1; i >= 0; i--) - if (regs[i].disable_load >= 0) - regulator_set_load(s[i].consumer, - regs[i].disable_load); - - regulator_bulk_disable(num, s); -} - -static int dsi_phy_regulator_enable(struct msm_dsi_phy *phy) -{ - struct regulator_bulk_data *s = phy->supplies; - const struct dsi_reg_entry *regs = phy->cfg->reg_cfg.regs; - struct device *dev = &phy->pdev->dev; - int num = phy->cfg->reg_cfg.num; - int ret, i; - - DBG(""); - for (i = 0; i < num; i++) { - if (regs[i].enable_load >= 0) { - ret = regulator_set_load(s[i].consumer, - regs[i].enable_load); - if (ret < 0) { - dev_err(dev, - "regulator %d set op mode failed, %d\n", - i, ret); - goto fail; - } - } - } - - ret = regulator_bulk_enable(num, s); - if (ret < 0) { - dev_err(dev, "regulator enable failed, %d\n", ret); - goto fail; - } - - return 0; - -fail: - for (i--; i >= 0; i--) - regulator_set_load(s[i].consumer, regs[i].disable_load); - return ret; -} - -static void dsi_phy_set_src_pll(struct msm_dsi_phy *phy, int pll_id, u32 reg, - u32 bit_mask) -{ - int phy_id = phy->id; - u32 val; - - if ((phy_id >= DSI_MAX) || (pll_id >= DSI_MAX)) - return; - - val = dsi_phy_read(phy->base + reg); - - if (phy->cfg->src_pll_truthtable[phy_id][pll_id]) - dsi_phy_write(phy->base + reg, val | bit_mask); - else - dsi_phy_write(phy->base + reg, val & (~bit_mask)); -} - -#define S_DIV_ROUND_UP(n, d) \ - (((n) >= 0) ? (((n) + (d) - 1) / (d)) : (((n) - (d) + 1) / (d))) - -static inline s32 linear_inter(s32 tmax, s32 tmin, s32 percent, - s32 min_result, bool even) -{ - s32 v; - v = (tmax - tmin) * percent; - v = S_DIV_ROUND_UP(v, 100) + tmin; - if (even && (v & 0x1)) - return max_t(s32, min_result, v - 1); - else - return max_t(s32, min_result, v); -} - -static void dsi_dphy_timing_calc_clk_zero(struct dsi_dphy_timing *timing, - s32 ui, s32 coeff, s32 pcnt) -{ - s32 tmax, tmin, clk_z; - s32 temp; - - /* reset */ - temp = 300 * coeff - ((timing->clk_prepare >> 1) + 1) * 2 * ui; - tmin = S_DIV_ROUND_UP(temp, ui) - 2; - if (tmin > 255) { - tmax = 511; - clk_z = linear_inter(2 * tmin, tmin, pcnt, 0, true); - } else { - tmax = 255; - clk_z = linear_inter(tmax, tmin, pcnt, 0, true); - } - - /* adjust */ - temp = (timing->hs_rqst + timing->clk_prepare + clk_z) & 0x7; - timing->clk_zero = clk_z + 8 - temp; -} - -static int dsi_dphy_timing_calc(struct dsi_dphy_timing *timing, - const unsigned long bit_rate, const unsigned long esc_rate) -{ - s32 ui, lpx; - s32 tmax, tmin; - s32 pcnt0 = 10; - s32 pcnt1 = (bit_rate > 1200000000) ? 15 : 10; - s32 pcnt2 = 10; - s32 pcnt3 = (bit_rate > 180000000) ? 10 : 40; - s32 coeff = 1000; /* Precision, should avoid overflow */ - s32 temp; - - if (!bit_rate || !esc_rate) - return -EINVAL; - - ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000); - lpx = mult_frac(NSEC_PER_MSEC, coeff, esc_rate / 1000); - - tmax = S_DIV_ROUND_UP(95 * coeff, ui) - 2; - tmin = S_DIV_ROUND_UP(38 * coeff, ui) - 2; - timing->clk_prepare = linear_inter(tmax, tmin, pcnt0, 0, true); - - temp = lpx / ui; - if (temp & 0x1) - timing->hs_rqst = temp; - else - timing->hs_rqst = max_t(s32, 0, temp - 2); - - /* Calculate clk_zero after clk_prepare and hs_rqst */ - dsi_dphy_timing_calc_clk_zero(timing, ui, coeff, pcnt2); - - temp = 105 * coeff + 12 * ui - 20 * coeff; - tmax = S_DIV_ROUND_UP(temp, ui) - 2; - tmin = S_DIV_ROUND_UP(60 * coeff, ui) - 2; - timing->clk_trail = linear_inter(tmax, tmin, pcnt3, 0, true); - - temp = 85 * coeff + 6 * ui; - tmax = S_DIV_ROUND_UP(temp, ui) - 2; - temp = 40 * coeff + 4 * ui; - tmin = S_DIV_ROUND_UP(temp, ui) - 2; - timing->hs_prepare = linear_inter(tmax, tmin, pcnt1, 0, true); - - tmax = 255; - temp = ((timing->hs_prepare >> 1) + 1) * 2 * ui + 2 * ui; - temp = 145 * coeff + 10 * ui - temp; - tmin = S_DIV_ROUND_UP(temp, ui) - 2; - timing->hs_zero = linear_inter(tmax, tmin, pcnt2, 24, true); - - temp = 105 * coeff + 12 * ui - 20 * coeff; - tmax = S_DIV_ROUND_UP(temp, ui) - 2; - temp = 60 * coeff + 4 * ui; - tmin = DIV_ROUND_UP(temp, ui) - 2; - timing->hs_trail = linear_inter(tmax, tmin, pcnt3, 0, true); - - tmax = 255; - tmin = S_DIV_ROUND_UP(100 * coeff, ui) - 2; - timing->hs_exit = linear_inter(tmax, tmin, pcnt2, 0, true); - - tmax = 63; - temp = ((timing->hs_exit >> 1) + 1) * 2 * ui; - temp = 60 * coeff + 52 * ui - 24 * ui - temp; - tmin = S_DIV_ROUND_UP(temp, 8 * ui) - 1; - timing->clk_post = linear_inter(tmax, tmin, pcnt2, 0, false); - - tmax = 63; - temp = ((timing->clk_prepare >> 1) + 1) * 2 * ui; - temp += ((timing->clk_zero >> 1) + 1) * 2 * ui; - temp += 8 * ui + lpx; - tmin = S_DIV_ROUND_UP(temp, 8 * ui) - 1; - if (tmin > tmax) { - temp = linear_inter(2 * tmax, tmin, pcnt2, 0, false) >> 1; - timing->clk_pre = temp >> 1; - temp = (2 * tmax - tmin) * pcnt2; - } else { - timing->clk_pre = linear_inter(tmax, tmin, pcnt2, 0, false); - } - - timing->ta_go = 3; - timing->ta_sure = 0; - timing->ta_get = 4; - - DBG("PHY timings: %d, %d, %d, %d, %d, %d, %d, %d, %d, %d", - timing->clk_pre, timing->clk_post, timing->clk_zero, - timing->clk_trail, timing->clk_prepare, timing->hs_exit, - timing->hs_zero, timing->hs_prepare, timing->hs_trail, - timing->hs_rqst); - - return 0; -} - -static void dsi_28nm_phy_regulator_ctrl(struct msm_dsi_phy *phy, bool enable) -{ - void __iomem *base = phy->reg_base; - - if (!enable) { - dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CAL_PWR_CFG, 0); - return; - } - - dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_0, 0x0); - dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CAL_PWR_CFG, 1); - dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_5, 0); - dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_3, 0); - dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_2, 0x3); - dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_1, 0x9); - dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_0, 0x7); - dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_4, 0x20); -} - -static int dsi_28nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id, - const unsigned long bit_rate, const unsigned long esc_rate) -{ - struct dsi_dphy_timing *timing = &phy->timing; - int i; - void __iomem *base = phy->base; - - DBG(""); - - if (dsi_dphy_timing_calc(timing, bit_rate, esc_rate)) { - pr_err("%s: D-PHY timing calculation failed\n", __func__); - return -EINVAL; - } - - dsi_phy_write(base + REG_DSI_28nm_PHY_STRENGTH_0, 0xff); - - dsi_28nm_phy_regulator_ctrl(phy, true); - - dsi_phy_write(base + REG_DSI_28nm_PHY_LDO_CNTRL, 0x00); - - dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_0, - DSI_28nm_PHY_TIMING_CTRL_0_CLK_ZERO(timing->clk_zero)); - dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_1, - DSI_28nm_PHY_TIMING_CTRL_1_CLK_TRAIL(timing->clk_trail)); - dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_2, - DSI_28nm_PHY_TIMING_CTRL_2_CLK_PREPARE(timing->clk_prepare)); - if (timing->clk_zero & BIT(8)) - dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_3, - DSI_28nm_PHY_TIMING_CTRL_3_CLK_ZERO_8); - dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_4, - DSI_28nm_PHY_TIMING_CTRL_4_HS_EXIT(timing->hs_exit)); - dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_5, - DSI_28nm_PHY_TIMING_CTRL_5_HS_ZERO(timing->hs_zero)); - dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_6, - DSI_28nm_PHY_TIMING_CTRL_6_HS_PREPARE(timing->hs_prepare)); - dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_7, - DSI_28nm_PHY_TIMING_CTRL_7_HS_TRAIL(timing->hs_trail)); - dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_8, - DSI_28nm_PHY_TIMING_CTRL_8_HS_RQST(timing->hs_rqst)); - dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_9, - DSI_28nm_PHY_TIMING_CTRL_9_TA_GO(timing->ta_go) | - DSI_28nm_PHY_TIMING_CTRL_9_TA_SURE(timing->ta_sure)); - dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_10, - DSI_28nm_PHY_TIMING_CTRL_10_TA_GET(timing->ta_get)); - dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_11, - DSI_28nm_PHY_TIMING_CTRL_11_TRIG3_CMD(0)); - - dsi_phy_write(base + REG_DSI_28nm_PHY_CTRL_1, 0x00); - dsi_phy_write(base + REG_DSI_28nm_PHY_CTRL_0, 0x5f); - - dsi_phy_write(base + REG_DSI_28nm_PHY_STRENGTH_1, 0x6); - - for (i = 0; i < 4; i++) { - dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_0(i), 0); - dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_1(i), 0); - dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_2(i), 0); - dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_3(i), 0); - dsi_phy_write(base + REG_DSI_28nm_PHY_LN_TEST_DATAPATH(i), 0); - dsi_phy_write(base + REG_DSI_28nm_PHY_LN_DEBUG_SEL(i), 0); - dsi_phy_write(base + REG_DSI_28nm_PHY_LN_TEST_STR_0(i), 0x1); - dsi_phy_write(base + REG_DSI_28nm_PHY_LN_TEST_STR_1(i), 0x97); - } - dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_4(0), 0); - dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_4(1), 0x5); - dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_4(2), 0xa); - dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_4(3), 0xf); - - dsi_phy_write(base + REG_DSI_28nm_PHY_LNCK_CFG_1, 0xc0); - dsi_phy_write(base + REG_DSI_28nm_PHY_LNCK_TEST_STR0, 0x1); - dsi_phy_write(base + REG_DSI_28nm_PHY_LNCK_TEST_STR1, 0xbb); - - dsi_phy_write(base + REG_DSI_28nm_PHY_CTRL_0, 0x5f); - - dsi_phy_set_src_pll(phy, src_pll_id, REG_DSI_28nm_PHY_GLBL_TEST_CTRL, - DSI_28nm_PHY_GLBL_TEST_CTRL_BITCLK_HS_SEL); - - return 0; -} - -static void dsi_28nm_phy_disable(struct msm_dsi_phy *phy) -{ - dsi_phy_write(phy->base + REG_DSI_28nm_PHY_CTRL_0, 0); - dsi_28nm_phy_regulator_ctrl(phy, false); - - /* - * Wait for the registers writes to complete in order to - * ensure that the phy is completely disabled - */ - wmb(); -} - -static void dsi_20nm_phy_regulator_ctrl(struct msm_dsi_phy *phy, bool enable) -{ - void __iomem *base = phy->reg_base; - - if (!enable) { - dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CAL_PWR_CFG, 0); - return; - } - - if (phy->regulator_ldo_mode) { - dsi_phy_write(phy->base + REG_DSI_20nm_PHY_LDO_CNTRL, 0x1d); - return; - } - - /* non LDO mode */ - dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CTRL_1, 0x03); - dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CTRL_2, 0x03); - dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CTRL_3, 0x00); - dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CTRL_4, 0x20); - dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CAL_PWR_CFG, 0x01); - dsi_phy_write(phy->base + REG_DSI_20nm_PHY_LDO_CNTRL, 0x00); - dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CTRL_0, 0x03); -} - -static int dsi_20nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id, - const unsigned long bit_rate, const unsigned long esc_rate) -{ - struct dsi_dphy_timing *timing = &phy->timing; - int i; - void __iomem *base = phy->base; - u32 cfg_4[4] = {0x20, 0x40, 0x20, 0x00}; - - DBG(""); - - if (dsi_dphy_timing_calc(timing, bit_rate, esc_rate)) { - pr_err("%s: D-PHY timing calculation failed\n", __func__); - return -EINVAL; - } - - dsi_20nm_phy_regulator_ctrl(phy, true); - - dsi_phy_write(base + REG_DSI_20nm_PHY_STRENGTH_0, 0xff); - - dsi_phy_set_src_pll(phy, src_pll_id, REG_DSI_20nm_PHY_GLBL_TEST_CTRL, - DSI_20nm_PHY_GLBL_TEST_CTRL_BITCLK_HS_SEL); - - for (i = 0; i < 4; i++) { - dsi_phy_write(base + REG_DSI_20nm_PHY_LN_CFG_3(i), - (i >> 1) * 0x40); - dsi_phy_write(base + REG_DSI_20nm_PHY_LN_TEST_STR_0(i), 0x01); - dsi_phy_write(base + REG_DSI_20nm_PHY_LN_TEST_STR_1(i), 0x46); - dsi_phy_write(base + REG_DSI_20nm_PHY_LN_CFG_0(i), 0x02); - dsi_phy_write(base + REG_DSI_20nm_PHY_LN_CFG_1(i), 0xa0); - dsi_phy_write(base + REG_DSI_20nm_PHY_LN_CFG_4(i), cfg_4[i]); - } - - dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_CFG_3, 0x80); - dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_TEST_STR0, 0x01); - dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_TEST_STR1, 0x46); - dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_CFG_0, 0x00); - dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_CFG_1, 0xa0); - dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_CFG_2, 0x00); - dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_CFG_4, 0x00); - - dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_0, - DSI_20nm_PHY_TIMING_CTRL_0_CLK_ZERO(timing->clk_zero)); - dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_1, - DSI_20nm_PHY_TIMING_CTRL_1_CLK_TRAIL(timing->clk_trail)); - dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_2, - DSI_20nm_PHY_TIMING_CTRL_2_CLK_PREPARE(timing->clk_prepare)); - if (timing->clk_zero & BIT(8)) - dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_3, - DSI_20nm_PHY_TIMING_CTRL_3_CLK_ZERO_8); - dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_4, - DSI_20nm_PHY_TIMING_CTRL_4_HS_EXIT(timing->hs_exit)); - dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_5, - DSI_20nm_PHY_TIMING_CTRL_5_HS_ZERO(timing->hs_zero)); - dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_6, - DSI_20nm_PHY_TIMING_CTRL_6_HS_PREPARE(timing->hs_prepare)); - dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_7, - DSI_20nm_PHY_TIMING_CTRL_7_HS_TRAIL(timing->hs_trail)); - dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_8, - DSI_20nm_PHY_TIMING_CTRL_8_HS_RQST(timing->hs_rqst)); - dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_9, - DSI_20nm_PHY_TIMING_CTRL_9_TA_GO(timing->ta_go) | - DSI_20nm_PHY_TIMING_CTRL_9_TA_SURE(timing->ta_sure)); - dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_10, - DSI_20nm_PHY_TIMING_CTRL_10_TA_GET(timing->ta_get)); - dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_11, - DSI_20nm_PHY_TIMING_CTRL_11_TRIG3_CMD(0)); - - dsi_phy_write(base + REG_DSI_20nm_PHY_CTRL_1, 0x00); - - dsi_phy_write(base + REG_DSI_20nm_PHY_STRENGTH_1, 0x06); - - /* make sure everything is written before enable */ - wmb(); - dsi_phy_write(base + REG_DSI_20nm_PHY_CTRL_0, 0x7f); - - return 0; -} - -static void dsi_20nm_phy_disable(struct msm_dsi_phy *phy) -{ - dsi_phy_write(phy->base + REG_DSI_20nm_PHY_CTRL_0, 0); - dsi_20nm_phy_regulator_ctrl(phy, false); -} - -static int dsi_phy_enable_resource(struct msm_dsi_phy *phy) -{ - int ret; - - pm_runtime_get_sync(&phy->pdev->dev); - - ret = clk_prepare_enable(phy->ahb_clk); - if (ret) { - pr_err("%s: can't enable ahb clk, %d\n", __func__, ret); - pm_runtime_put_sync(&phy->pdev->dev); - } - - return ret; -} - -static void dsi_phy_disable_resource(struct msm_dsi_phy *phy) -{ - clk_disable_unprepare(phy->ahb_clk); - pm_runtime_put_sync(&phy->pdev->dev); -} - -static const struct dsi_phy_cfg dsi_phy_cfgs[MSM_DSI_PHY_MAX] = { - [MSM_DSI_PHY_28NM_HPM] = { - .type = MSM_DSI_PHY_28NM_HPM, - .src_pll_truthtable = { {true, true}, {false, true} }, - .reg_cfg = { - .num = 1, - .regs = { - {"vddio", 1800000, 1800000, 100000, 100}, - }, - }, - .ops = { - .enable = dsi_28nm_phy_enable, - .disable = dsi_28nm_phy_disable, - } - }, - [MSM_DSI_PHY_28NM_LP] = { - .type = MSM_DSI_PHY_28NM_LP, - .src_pll_truthtable = { {true, true}, {true, true} }, - .reg_cfg = { - .num = 1, - .regs = { - {"vddio", 1800000, 1800000, 100000, 100}, - }, - }, - .ops = { - .enable = dsi_28nm_phy_enable, - .disable = dsi_28nm_phy_disable, - } - }, - [MSM_DSI_PHY_20NM] = { - .type = MSM_DSI_PHY_20NM, - .src_pll_truthtable = { {false, true}, {false, true} }, - .reg_cfg = { - .num = 2, - .regs = { - {"vddio", 1800000, 1800000, 100000, 100}, - {"vcca", 1000000, 1000000, 10000, 100}, - }, - }, - .ops = { - .enable = dsi_20nm_phy_enable, - .disable = dsi_20nm_phy_disable, - } - }, -}; - -static const struct of_device_id dsi_phy_dt_match[] = { - { .compatible = "qcom,dsi-phy-28nm-hpm", - .data = &dsi_phy_cfgs[MSM_DSI_PHY_28NM_HPM],}, - { .compatible = "qcom,dsi-phy-28nm-lp", - .data = &dsi_phy_cfgs[MSM_DSI_PHY_28NM_LP],}, - { .compatible = "qcom,dsi-phy-20nm", - .data = &dsi_phy_cfgs[MSM_DSI_PHY_20NM],}, - {} -}; - -static int dsi_phy_driver_probe(struct platform_device *pdev) -{ - struct msm_dsi_phy *phy; - const struct of_device_id *match; - int ret; - - phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL); - if (!phy) - return -ENOMEM; - - match = of_match_node(dsi_phy_dt_match, pdev->dev.of_node); - if (!match) - return -ENODEV; - - phy->cfg = match->data; - phy->pdev = pdev; - - ret = of_property_read_u32(pdev->dev.of_node, - "qcom,dsi-phy-index", &phy->id); - if (ret) { - dev_err(&pdev->dev, - "%s: PHY index not specified, ret=%d\n", - __func__, ret); - goto fail; - } - - phy->regulator_ldo_mode = of_property_read_bool(pdev->dev.of_node, - "qcom,dsi-phy-regulator-ldo-mode"); - - phy->base = msm_ioremap(pdev, "dsi_phy", "DSI_PHY"); - if (IS_ERR(phy->base)) { - dev_err(&pdev->dev, "%s: failed to map phy base\n", __func__); - ret = -ENOMEM; - goto fail; - } - phy->reg_base = msm_ioremap(pdev, "dsi_phy_regulator", "DSI_PHY_REG"); - if (IS_ERR(phy->reg_base)) { - dev_err(&pdev->dev, - "%s: failed to map phy regulator base\n", __func__); - ret = -ENOMEM; - goto fail; - } - - ret = dsi_phy_regulator_init(phy); - if (ret) { - dev_err(&pdev->dev, "%s: failed to init regulator\n", __func__); - goto fail; - } - - phy->ahb_clk = devm_clk_get(&pdev->dev, "iface_clk"); - if (IS_ERR(phy->ahb_clk)) { - pr_err("%s: Unable to get ahb clk\n", __func__); - ret = PTR_ERR(phy->ahb_clk); - goto fail; - } - - /* PLL init will call into clk_register which requires - * register access, so we need to enable power and ahb clock. - */ - ret = dsi_phy_enable_resource(phy); - if (ret) - goto fail; - - phy->pll = msm_dsi_pll_init(pdev, phy->cfg->type, phy->id); - if (!phy->pll) - dev_info(&pdev->dev, - "%s: pll init failed, need separate pll clk driver\n", - __func__); - - dsi_phy_disable_resource(phy); - - platform_set_drvdata(pdev, phy); - - return 0; - -fail: - return ret; -} - -static int dsi_phy_driver_remove(struct platform_device *pdev) -{ - struct msm_dsi_phy *phy = platform_get_drvdata(pdev); - - if (phy && phy->pll) { - msm_dsi_pll_destroy(phy->pll); - phy->pll = NULL; - } - - platform_set_drvdata(pdev, NULL); - - return 0; -} - -static struct platform_driver dsi_phy_platform_driver = { - .probe = dsi_phy_driver_probe, - .remove = dsi_phy_driver_remove, - .driver = { - .name = "msm_dsi_phy", - .of_match_table = dsi_phy_dt_match, - }, -}; - -void __init msm_dsi_phy_driver_register(void) -{ - platform_driver_register(&dsi_phy_platform_driver); -} - -void __exit msm_dsi_phy_driver_unregister(void) -{ - platform_driver_unregister(&dsi_phy_platform_driver); -} - -int msm_dsi_phy_enable(struct msm_dsi_phy *phy, int src_pll_id, - const unsigned long bit_rate, const unsigned long esc_rate) -{ - int ret; - - if (!phy || !phy->cfg->ops.enable) - return -EINVAL; - - ret = dsi_phy_regulator_enable(phy); - if (ret) { - dev_err(&phy->pdev->dev, "%s: regulator enable failed, %d\n", - __func__, ret); - return ret; - } - - return phy->cfg->ops.enable(phy, src_pll_id, bit_rate, esc_rate); -} - -void msm_dsi_phy_disable(struct msm_dsi_phy *phy) -{ - if (!phy || !phy->cfg->ops.disable) - return; - - phy->cfg->ops.disable(phy); - dsi_phy_regulator_disable(phy); -} - -void msm_dsi_phy_get_clk_pre_post(struct msm_dsi_phy *phy, - u32 *clk_pre, u32 *clk_post) -{ - if (!phy) - return; - if (clk_pre) - *clk_pre = phy->timing.clk_pre; - if (clk_post) - *clk_post = phy->timing.clk_post; -} - -struct msm_dsi_pll *msm_dsi_phy_get_pll(struct msm_dsi_phy *phy) -{ - if (!phy) - return NULL; - - return phy->pll; -} - diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c new file mode 100644 index 0000000..828a94c --- /dev/null +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c @@ -0,0 +1,448 @@ +/* + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. See the + * GNU General Public License for more details. + */ + +#include <linux/platform_device.h> + +#include "dsi_phy.h" + +#define S_DIV_ROUND_UP(n, d) \ + (((n) >= 0) ? (((n) + (d) - 1) / (d)) : (((n) - (d) + 1) / (d))) + +static inline s32 linear_inter(s32 tmax, s32 tmin, s32 percent, + s32 min_result, bool even) +{ + s32 v; + + v = (tmax - tmin) * percent; + v = S_DIV_ROUND_UP(v, 100) + tmin; + if (even && (v & 0x1)) + return max_t(s32, min_result, v - 1); + else + return max_t(s32, min_result, v); +} + +static void dsi_dphy_timing_calc_clk_zero(struct msm_dsi_dphy_timing *timing, + s32 ui, s32 coeff, s32 pcnt) +{ + s32 tmax, tmin, clk_z; + s32 temp; + + /* reset */ + temp = 300 * coeff - ((timing->clk_prepare >> 1) + 1) * 2 * ui; + tmin = S_DIV_ROUND_UP(temp, ui) - 2; + if (tmin > 255) { + tmax = 511; + clk_z = linear_inter(2 * tmin, tmin, pcnt, 0, true); + } else { + tmax = 255; + clk_z = linear_inter(tmax, tmin, pcnt, 0, true); + } + + /* adjust */ + temp = (timing->hs_rqst + timing->clk_prepare + clk_z) & 0x7; + timing->clk_zero = clk_z + 8 - temp; +} + +int msm_dsi_dphy_timing_calc(struct msm_dsi_dphy_timing *timing, + const unsigned long bit_rate, const unsigned long esc_rate) +{ + s32 ui, lpx; + s32 tmax, tmin; + s32 pcnt0 = 10; + s32 pcnt1 = (bit_rate > 1200000000) ? 15 : 10; + s32 pcnt2 = 10; + s32 pcnt3 = (bit_rate > 180000000) ? 10 : 40; + s32 coeff = 1000; /* Precision, should avoid overflow */ + s32 temp; + + if (!bit_rate || !esc_rate) + return -EINVAL; + + ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000); + lpx = mult_frac(NSEC_PER_MSEC, coeff, esc_rate / 1000); + + tmax = S_DIV_ROUND_UP(95 * coeff, ui) - 2; + tmin = S_DIV_ROUND_UP(38 * coeff, ui) - 2; + timing->clk_prepare = linear_inter(tmax, tmin, pcnt0, 0, true); + + temp = lpx / ui; + if (temp & 0x1) + timing->hs_rqst = temp; + else + timing->hs_rqst = max_t(s32, 0, temp - 2); + + /* Calculate clk_zero after clk_prepare and hs_rqst */ + dsi_dphy_timing_calc_clk_zero(timing, ui, coeff, pcnt2); + + temp = 105 * coeff + 12 * ui - 20 * coeff; + tmax = S_DIV_ROUND_UP(temp, ui) - 2; + tmin = S_DIV_ROUND_UP(60 * coeff, ui) - 2; + timing->clk_trail = linear_inter(tmax, tmin, pcnt3, 0, true); + + temp = 85 * coeff + 6 * ui; + tmax = S_DIV_ROUND_UP(temp, ui) - 2; + temp = 40 * coeff + 4 * ui; + tmin = S_DIV_ROUND_UP(temp, ui) - 2; + timing->hs_prepare = linear_inter(tmax, tmin, pcnt1, 0, true); + + tmax = 255; + temp = ((timing->hs_prepare >> 1) + 1) * 2 * ui + 2 * ui; + temp = 145 * coeff + 10 * ui - temp; + tmin = S_DIV_ROUND_UP(temp, ui) - 2; + timing->hs_zero = linear_inter(tmax, tmin, pcnt2, 24, true); + + temp = 105 * coeff + 12 * ui - 20 * coeff; + tmax = S_DIV_ROUND_UP(temp, ui) - 2; + temp = 60 * coeff + 4 * ui; + tmin = DIV_ROUND_UP(temp, ui) - 2; + timing->hs_trail = linear_inter(tmax, tmin, pcnt3, 0, true); + + tmax = 255; + tmin = S_DIV_ROUND_UP(100 * coeff, ui) - 2; + timing->hs_exit = linear_inter(tmax, tmin, pcnt2, 0, true); + + tmax = 63; + temp = ((timing->hs_exit >> 1) + 1) * 2 * ui; + temp = 60 * coeff + 52 * ui - 24 * ui - temp; + tmin = S_DIV_ROUND_UP(temp, 8 * ui) - 1; + timing->clk_post = linear_inter(tmax, tmin, pcnt2, 0, false); + + tmax = 63; + temp = ((timing->clk_prepare >> 1) + 1) * 2 * ui; + temp += ((timing->clk_zero >> 1) + 1) * 2 * ui; + temp += 8 * ui + lpx; + tmin = S_DIV_ROUND_UP(temp, 8 * ui) - 1; + if (tmin > tmax) { + temp = linear_inter(2 * tmax, tmin, pcnt2, 0, false); + timing->clk_pre = temp >> 1; + } else { + timing->clk_pre = linear_inter(tmax, tmin, pcnt2, 0, false); + } + + timing->ta_go = 3; + timing->ta_sure = 0; + timing->ta_get = 4; + + DBG("PHY timings: %d, %d, %d, %d, %d, %d, %d, %d, %d, %d", + timing->clk_pre, timing->clk_post, timing->clk_zero, + timing->clk_trail, timing->clk_prepare, timing->hs_exit, + timing->hs_zero, timing->hs_prepare, timing->hs_trail, + timing->hs_rqst); + + return 0; +} + +void msm_dsi_phy_set_src_pll(struct msm_dsi_phy *phy, int pll_id, u32 reg, + u32 bit_mask) +{ + int phy_id = phy->id; + u32 val; + + if ((phy_id >= DSI_MAX) || (pll_id >= DSI_MAX)) + return; + + val = dsi_phy_read(phy->base + reg); + + if (phy->cfg->src_pll_truthtable[phy_id][pll_id]) + dsi_phy_write(phy->base + reg, val | bit_mask); + else + dsi_phy_write(phy->base + reg, val & (~bit_mask)); +} + +static int dsi_phy_regulator_init(struct msm_dsi_phy *phy) +{ + struct regulator_bulk_data *s = phy->supplies; + const struct dsi_reg_entry *regs = phy->cfg->reg_cfg.regs; + struct device *dev = &phy->pdev->dev; + int num = phy->cfg->reg_cfg.num; + int i, ret; + + for (i = 0; i < num; i++) + s[i].supply = regs[i].name; + + ret = devm_regulator_bulk_get(dev, num, s); + if (ret < 0) { + dev_err(dev, "%s: failed to init regulator, ret=%d\n", + __func__, ret); + return ret; + } + + for (i = 0; i < num; i++) { + if ((regs[i].min_voltage >= 0) && (regs[i].max_voltage >= 0)) { + ret = regulator_set_voltage(s[i].consumer, + regs[i].min_voltage, regs[i].max_voltage); + if (ret < 0) { + dev_err(dev, + "regulator %d set voltage failed, %d\n", + i, ret); + return ret; + } + } + } + + return 0; +} + +static void dsi_phy_regulator_disable(struct msm_dsi_phy *phy) +{ + struct regulator_bulk_data *s = phy->supplies; + const struct dsi_reg_entry *regs = phy->cfg->reg_cfg.regs; + int num = phy->cfg->reg_cfg.num; + int i; + + DBG(""); + for (i = num - 1; i >= 0; i--) + if (regs[i].disable_load >= 0) + regulator_set_load(s[i].consumer, regs[i].disable_load); + + regulator_bulk_disable(num, s); +} + +static int dsi_phy_regulator_enable(struct msm_dsi_phy *phy) +{ + struct regulator_bulk_data *s = phy->supplies; + const struct dsi_reg_entry *regs = phy->cfg->reg_cfg.regs; + struct device *dev = &phy->pdev->dev; + int num = phy->cfg->reg_cfg.num; + int ret, i; + + DBG(""); + for (i = 0; i < num; i++) { + if (regs[i].enable_load >= 0) { + ret = regulator_set_load(s[i].consumer, + regs[i].enable_load); + if (ret < 0) { + dev_err(dev, + "regulator %d set op mode failed, %d\n", + i, ret); + goto fail; + } + } + } + + ret = regulator_bulk_enable(num, s); + if (ret < 0) { + dev_err(dev, "regulator enable failed, %d\n", ret); + goto fail; + } + + return 0; + +fail: + for (i--; i >= 0; i--) + regulator_set_load(s[i].consumer, regs[i].disable_load); + return ret; +} + +static int dsi_phy_enable_resource(struct msm_dsi_phy *phy) +{ + struct device *dev = &phy->pdev->dev; + int ret; + + pm_runtime_get_sync(dev); + + ret = clk_prepare_enable(phy->ahb_clk); + if (ret) { + dev_err(dev, "%s: can't enable ahb clk, %d\n", __func__, ret); + pm_runtime_put_sync(dev); + } + + return ret; +} + +static void dsi_phy_disable_resource(struct msm_dsi_phy *phy) +{ + clk_disable_unprepare(phy->ahb_clk); + pm_runtime_put_sync(&phy->pdev->dev); +} + +static const struct of_device_id dsi_phy_dt_match[] = { + { .compatible = "qcom,dsi-phy-28nm-hpm", + .data = &dsi_phy_28nm_hpm_cfgs }, + { .compatible = "qcom,dsi-phy-28nm-lp", + .data = &dsi_phy_28nm_lp_cfgs }, + { .compatible = "qcom,dsi-phy-20nm", + .data = &dsi_phy_20nm_cfgs }, + {} +}; + +static int dsi_phy_driver_probe(struct platform_device *pdev) +{ + struct msm_dsi_phy *phy; + struct device *dev = &pdev->dev; + const struct of_device_id *match; + int ret; + + phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); + if (!phy) + return -ENOMEM; + + match = of_match_node(dsi_phy_dt_match, dev->of_node); + if (!match) + return -ENODEV; + + phy->cfg = match->data; + phy->pdev = pdev; + + ret = of_property_read_u32(dev->of_node, + "qcom,dsi-phy-index", &phy->id); + if (ret) { + dev_err(dev, "%s: PHY index not specified, %d\n", + __func__, ret); + goto fail; + } + + phy->regulator_ldo_mode = of_property_read_bool(dev->of_node, + "qcom,dsi-phy-regulator-ldo-mode"); + + phy->base = msm_ioremap(pdev, "dsi_phy", "DSI_PHY"); + if (IS_ERR(phy->base)) { + dev_err(dev, "%s: failed to map phy base\n", __func__); + ret = -ENOMEM; + goto fail; + } + + phy->reg_base = msm_ioremap(pdev, "dsi_phy_regulator", + "DSI_PHY_REG"); + if (IS_ERR(phy->reg_base)) { + dev_err(dev, "%s: failed to map phy regulator base\n", + __func__); + ret = -ENOMEM; + goto fail; + } + + ret = dsi_phy_regulator_init(phy); + if (ret) { + dev_err(dev, "%s: failed to init regulator\n", __func__); + goto fail; + } + + phy->ahb_clk = devm_clk_get(dev, "iface_clk"); + if (IS_ERR(phy->ahb_clk)) { + dev_err(dev, "%s: Unable to get ahb clk\n", __func__); + ret = PTR_ERR(phy->ahb_clk); + goto fail; + } + + /* PLL init will call into clk_register which requires + * register access, so we need to enable power and ahb clock. + */ + ret = dsi_phy_enable_resource(phy); + if (ret) + goto fail; + + phy->pll = msm_dsi_pll_init(pdev, phy->cfg->type, phy->id); + if (!phy->pll) + dev_info(dev, + "%s: pll init failed, need separate pll clk driver\n", + __func__); + + dsi_phy_disable_resource(phy); + + platform_set_drvdata(pdev, phy); + + return 0; + +fail: + return ret; +} + +static int dsi_phy_driver_remove(struct platform_device *pdev) +{ + struct msm_dsi_phy *phy = platform_get_drvdata(pdev); + + if (phy && phy->pll) { + msm_dsi_pll_destroy(phy->pll); + phy->pll = NULL; + } + + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static struct platform_driver dsi_phy_platform_driver = { + .probe = dsi_phy_driver_probe, + .remove = dsi_phy_driver_remove, + .driver = { + .name = "msm_dsi_phy", + .of_match_table = dsi_phy_dt_match, + }, +}; + +void __init msm_dsi_phy_driver_register(void) +{ + platform_driver_register(&dsi_phy_platform_driver); +} + +void __exit msm_dsi_phy_driver_unregister(void) +{ + platform_driver_unregister(&dsi_phy_platform_driver); +} + +int msm_dsi_phy_enable(struct msm_dsi_phy *phy, int src_pll_id, + const unsigned long bit_rate, const unsigned long esc_rate) +{ + struct device *dev = &phy->pdev->dev; + int ret; + + if (!phy || !phy->cfg->ops.enable) + return -EINVAL; + + ret = dsi_phy_regulator_enable(phy); + if (ret) { + dev_err(dev, "%s: regulator enable failed, %d\n", + __func__, ret); + return ret; + } + + ret = phy->cfg->ops.enable(phy, src_pll_id, bit_rate, esc_rate); + if (ret) { + dev_err(dev, "%s: phy enable failed, %d\n", __func__, ret); + dsi_phy_regulator_disable(phy); + return ret; + } + + return 0; +} + +void msm_dsi_phy_disable(struct msm_dsi_phy *phy) +{ + if (!phy || !phy->cfg->ops.disable) + return; + + phy->cfg->ops.disable(phy); + + dsi_phy_regulator_disable(phy); +} + +void msm_dsi_phy_get_clk_pre_post(struct msm_dsi_phy *phy, + u32 *clk_pre, u32 *clk_post) +{ + if (!phy) + return; + + if (clk_pre) + *clk_pre = phy->timing.clk_pre; + if (clk_post) + *clk_post = phy->timing.clk_post; +} + +struct msm_dsi_pll *msm_dsi_phy_get_pll(struct msm_dsi_phy *phy) +{ + if (!phy) + return NULL; + + return phy->pll; +} + diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h new file mode 100644 index 0000000..0456b25 --- /dev/null +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h @@ -0,0 +1,89 @@ +/* + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. See the + * GNU General Public License for more details. + */ + +#ifndef __DSI_PHY_H__ +#define __DSI_PHY_H__ + +#include <linux/regulator/consumer.h> + +#include "dsi.h" + +#define dsi_phy_read(offset) msm_readl((offset)) +#define dsi_phy_write(offset, data) msm_writel((data), (offset)) + +struct msm_dsi_phy_ops { + int (*enable)(struct msm_dsi_phy *phy, int src_pll_id, + const unsigned long bit_rate, const unsigned long esc_rate); + void (*disable)(struct msm_dsi_phy *phy); +}; + +struct msm_dsi_phy_cfg { + enum msm_dsi_phy_type type; + struct dsi_reg_config reg_cfg; + struct msm_dsi_phy_ops ops; + + /* + * Each cell {phy_id, pll_id} of the truth table indicates + * if the source PLL selection bit should be set for each PHY. + * Fill default H/W values in illegal cells, eg. cell {0, 1}. + */ + bool src_pll_truthtable[DSI_MAX][DSI_MAX]; +}; + +extern const struct msm_dsi_phy_cfg dsi_phy_28nm_hpm_cfgs; +extern const struct msm_dsi_phy_cfg dsi_phy_28nm_lp_cfgs; +extern const struct msm_dsi_phy_cfg dsi_phy_20nm_cfgs; + +struct msm_dsi_dphy_timing { + u32 clk_pre; + u32 clk_post; + u32 clk_zero; + u32 clk_trail; + u32 clk_prepare; + u32 hs_exit; + u32 hs_zero; + u32 hs_prepare; + u32 hs_trail; + u32 hs_rqst; + u32 ta_go; + u32 ta_sure; + u32 ta_get; +}; + +struct msm_dsi_phy { + struct platform_device *pdev; + void __iomem *base; + void __iomem *reg_base; + int id; + + struct clk *ahb_clk; + struct regulator_bulk_data supplies[DSI_DEV_REGULATOR_MAX]; + + struct msm_dsi_dphy_timing timing; + const struct msm_dsi_phy_cfg *cfg; + + bool regulator_ldo_mode; + + struct msm_dsi_pll *pll; +}; + +/* + * PHY internal functions + */ +int msm_dsi_dphy_timing_calc(struct msm_dsi_dphy_timing *timing, + const unsigned long bit_rate, const unsigned long esc_rate); +void msm_dsi_phy_set_src_pll(struct msm_dsi_phy *phy, int pll_id, u32 reg, + u32 bit_mask); + +#endif /* __DSI_PHY_H__ */ + diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_20nm.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_20nm.c new file mode 100644 index 0000000..2e9ba11 --- /dev/null +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_20nm.c @@ -0,0 +1,150 @@ +/* + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. See the + * GNU General Public License for more details. + */ + +#include "dsi_phy.h" +#include "dsi.xml.h" + +static void dsi_20nm_dphy_set_timing(struct msm_dsi_phy *phy, + struct msm_dsi_dphy_timing *timing) +{ + void __iomem *base = phy->base; + + dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_0, + DSI_20nm_PHY_TIMING_CTRL_0_CLK_ZERO(timing->clk_zero)); + dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_1, + DSI_20nm_PHY_TIMING_CTRL_1_CLK_TRAIL(timing->clk_trail)); + dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_2, + DSI_20nm_PHY_TIMING_CTRL_2_CLK_PREPARE(timing->clk_prepare)); + if (timing->clk_zero & BIT(8)) + dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_3, + DSI_20nm_PHY_TIMING_CTRL_3_CLK_ZERO_8); + dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_4, + DSI_20nm_PHY_TIMING_CTRL_4_HS_EXIT(timing->hs_exit)); + dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_5, + DSI_20nm_PHY_TIMING_CTRL_5_HS_ZERO(timing->hs_zero)); + dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_6, + DSI_20nm_PHY_TIMING_CTRL_6_HS_PREPARE(timing->hs_prepare)); + dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_7, + DSI_20nm_PHY_TIMING_CTRL_7_HS_TRAIL(timing->hs_trail)); + dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_8, + DSI_20nm_PHY_TIMING_CTRL_8_HS_RQST(timing->hs_rqst)); + dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_9, + DSI_20nm_PHY_TIMING_CTRL_9_TA_GO(timing->ta_go) | + DSI_20nm_PHY_TIMING_CTRL_9_TA_SURE(timing->ta_sure)); + dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_10, + DSI_20nm_PHY_TIMING_CTRL_10_TA_GET(timing->ta_get)); + dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_11, + DSI_20nm_PHY_TIMING_CTRL_11_TRIG3_CMD(0)); +} + +static void dsi_20nm_phy_regulator_ctrl(struct msm_dsi_phy *phy, bool enable) +{ + void __iomem *base = phy->reg_base; + + if (!enable) { + dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CAL_PWR_CFG, 0); + return; + } + + if (phy->regulator_ldo_mode) { + dsi_phy_write(phy->base + REG_DSI_20nm_PHY_LDO_CNTRL, 0x1d); + return; + } + + /* non LDO mode */ + dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CTRL_1, 0x03); + dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CTRL_2, 0x03); + dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CTRL_3, 0x00); + dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CTRL_4, 0x20); + dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CAL_PWR_CFG, 0x01); + dsi_phy_write(phy->base + REG_DSI_20nm_PHY_LDO_CNTRL, 0x00); + dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CTRL_0, 0x03); +} + +static int dsi_20nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id, + const unsigned long bit_rate, const unsigned long esc_rate) +{ + struct msm_dsi_dphy_timing *timing = &phy->timing; + int i; + void __iomem *base = phy->base; + u32 cfg_4[4] = {0x20, 0x40, 0x20, 0x00}; + + DBG(""); + + if (msm_dsi_dphy_timing_calc(timing, bit_rate, esc_rate)) { + dev_err(&phy->pdev->dev, + "%s: D-PHY timing calculation failed\n", __func__); + return -EINVAL; + } + + dsi_20nm_phy_regulator_ctrl(phy, true); + + dsi_phy_write(base + REG_DSI_20nm_PHY_STRENGTH_0, 0xff); + + msm_dsi_phy_set_src_pll(phy, src_pll_id, + REG_DSI_20nm_PHY_GLBL_TEST_CTRL, + DSI_20nm_PHY_GLBL_TEST_CTRL_BITCLK_HS_SEL); + + for (i = 0; i < 4; i++) { + dsi_phy_write(base + REG_DSI_20nm_PHY_LN_CFG_3(i), + (i >> 1) * 0x40); + dsi_phy_write(base + REG_DSI_20nm_PHY_LN_TEST_STR_0(i), 0x01); + dsi_phy_write(base + REG_DSI_20nm_PHY_LN_TEST_STR_1(i), 0x46); + dsi_phy_write(base + REG_DSI_20nm_PHY_LN_CFG_0(i), 0x02); + dsi_phy_write(base + REG_DSI_20nm_PHY_LN_CFG_1(i), 0xa0); + dsi_phy_write(base + REG_DSI_20nm_PHY_LN_CFG_4(i), cfg_4[i]); + } + + dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_CFG_3, 0x80); + dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_TEST_STR0, 0x01); + dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_TEST_STR1, 0x46); + dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_CFG_0, 0x00); + dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_CFG_1, 0xa0); + dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_CFG_2, 0x00); + dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_CFG_4, 0x00); + + dsi_20nm_dphy_set_timing(phy, timing); + + dsi_phy_write(base + REG_DSI_20nm_PHY_CTRL_1, 0x00); + + dsi_phy_write(base + REG_DSI_20nm_PHY_STRENGTH_1, 0x06); + + /* make sure everything is written before enable */ + wmb(); + dsi_phy_write(base + REG_DSI_20nm_PHY_CTRL_0, 0x7f); + + return 0; +} + +static void dsi_20nm_phy_disable(struct msm_dsi_phy *phy) +{ + dsi_phy_write(phy->base + REG_DSI_20nm_PHY_CTRL_0, 0); + dsi_20nm_phy_regulator_ctrl(phy, false); +} + +const struct msm_dsi_phy_cfg dsi_phy_20nm_cfgs = { + .type = MSM_DSI_PHY_20NM, + .src_pll_truthtable = { {false, true}, {false, true} }, + .reg_cfg = { + .num = 2, + .regs = { + {"vddio", 1800000, 1800000, 100000, 100}, + {"vcca", 1000000, 1000000, 10000, 100}, + }, + }, + .ops = { + .enable = dsi_20nm_phy_enable, + .disable = dsi_20nm_phy_disable, + } +}; + diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c new file mode 100644 index 0000000..f1a7c7b --- /dev/null +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c @@ -0,0 +1,166 @@ +/* + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. See the + * GNU General Public License for more details. + */ + +#include "dsi_phy.h" +#include "dsi.xml.h" + +static void dsi_28nm_dphy_set_timing(struct msm_dsi_phy *phy, + struct msm_dsi_dphy_timing *timing) +{ + void __iomem *base = phy->base; + + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_0, + DSI_28nm_PHY_TIMING_CTRL_0_CLK_ZERO(timing->clk_zero)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_1, + DSI_28nm_PHY_TIMING_CTRL_1_CLK_TRAIL(timing->clk_trail)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_2, + DSI_28nm_PHY_TIMING_CTRL_2_CLK_PREPARE(timing->clk_prepare)); + if (timing->clk_zero & BIT(8)) + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_3, + DSI_28nm_PHY_TIMING_CTRL_3_CLK_ZERO_8); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_4, + DSI_28nm_PHY_TIMING_CTRL_4_HS_EXIT(timing->hs_exit)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_5, + DSI_28nm_PHY_TIMING_CTRL_5_HS_ZERO(timing->hs_zero)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_6, + DSI_28nm_PHY_TIMING_CTRL_6_HS_PREPARE(timing->hs_prepare)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_7, + DSI_28nm_PHY_TIMING_CTRL_7_HS_TRAIL(timing->hs_trail)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_8, + DSI_28nm_PHY_TIMING_CTRL_8_HS_RQST(timing->hs_rqst)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_9, + DSI_28nm_PHY_TIMING_CTRL_9_TA_GO(timing->ta_go) | + DSI_28nm_PHY_TIMING_CTRL_9_TA_SURE(timing->ta_sure)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_10, + DSI_28nm_PHY_TIMING_CTRL_10_TA_GET(timing->ta_get)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_11, + DSI_28nm_PHY_TIMING_CTRL_11_TRIG3_CMD(0)); +} + +static void dsi_28nm_phy_regulator_ctrl(struct msm_dsi_phy *phy, bool enable) +{ + void __iomem *base = phy->reg_base; + + if (!enable) { + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CAL_PWR_CFG, 0); + return; + } + + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_0, 0x0); + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CAL_PWR_CFG, 1); + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_5, 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_3, 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_2, 0x3); + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_1, 0x9); + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_0, 0x7); + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_4, 0x20); +} + +static int dsi_28nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id, + const unsigned long bit_rate, const unsigned long esc_rate) +{ + struct msm_dsi_dphy_timing *timing = &phy->timing; + int i; + void __iomem *base = phy->base; + + DBG(""); + + if (msm_dsi_dphy_timing_calc(timing, bit_rate, esc_rate)) { + dev_err(&phy->pdev->dev, + "%s: D-PHY timing calculation failed\n", __func__); + return -EINVAL; + } + + dsi_phy_write(base + REG_DSI_28nm_PHY_STRENGTH_0, 0xff); + + dsi_28nm_phy_regulator_ctrl(phy, true); + + dsi_phy_write(base + REG_DSI_28nm_PHY_LDO_CNTRL, 0x00); + + dsi_28nm_dphy_set_timing(phy, timing); + + dsi_phy_write(base + REG_DSI_28nm_PHY_CTRL_1, 0x00); + dsi_phy_write(base + REG_DSI_28nm_PHY_CTRL_0, 0x5f); + + dsi_phy_write(base + REG_DSI_28nm_PHY_STRENGTH_1, 0x6); + + for (i = 0; i < 4; i++) { + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_0(i), 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_1(i), 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_2(i), 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_3(i), 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_TEST_DATAPATH(i), 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_DEBUG_SEL(i), 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_TEST_STR_0(i), 0x1); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_TEST_STR_1(i), 0x97); + } + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_4(0), 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_4(1), 0x5); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_4(2), 0xa); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_4(3), 0xf); + + dsi_phy_write(base + REG_DSI_28nm_PHY_LNCK_CFG_1, 0xc0); + dsi_phy_write(base + REG_DSI_28nm_PHY_LNCK_TEST_STR0, 0x1); + dsi_phy_write(base + REG_DSI_28nm_PHY_LNCK_TEST_STR1, 0xbb); + + dsi_phy_write(base + REG_DSI_28nm_PHY_CTRL_0, 0x5f); + + msm_dsi_phy_set_src_pll(phy, src_pll_id, + REG_DSI_28nm_PHY_GLBL_TEST_CTRL, + DSI_28nm_PHY_GLBL_TEST_CTRL_BITCLK_HS_SEL); + + return 0; +} + +static void dsi_28nm_phy_disable(struct msm_dsi_phy *phy) +{ + dsi_phy_write(phy->base + REG_DSI_28nm_PHY_CTRL_0, 0); + dsi_28nm_phy_regulator_ctrl(phy, false); + + /* + * Wait for the registers writes to complete in order to + * ensure that the phy is completely disabled + */ + wmb(); +} + +const struct msm_dsi_phy_cfg dsi_phy_28nm_hpm_cfgs = { + .type = MSM_DSI_PHY_28NM_HPM, + .src_pll_truthtable = { {true, true}, {false, true} }, + .reg_cfg = { + .num = 1, + .regs = { + {"vddio", 1800000, 1800000, 100000, 100}, + }, + }, + .ops = { + .enable = dsi_28nm_phy_enable, + .disable = dsi_28nm_phy_disable, + }, +}; + +const struct msm_dsi_phy_cfg dsi_phy_28nm_lp_cfgs = { + .type = MSM_DSI_PHY_28NM_LP, + .src_pll_truthtable = { {true, true}, {true, true} }, + .reg_cfg = { + .num = 1, + .regs = { + {"vddio", 1800000, 1800000, 100000, 100}, + }, + }, + .ops = { + .enable = dsi_28nm_phy_enable, + .disable = dsi_28nm_phy_disable, + }, +}; +