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drm/msm/dsi: add support for 7nm DSI PHY/PLL

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This adds support for the 7nm ("V4") DSI PHY/PLL for sm8150 and sm8250.

Implementation is based on 10nm driver, but updated based on the downstream
7nm driver.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> (SM8250)
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Jonathan Marek
2020-09-11 11:09:39 -04:00
committed by Rob Clark
parent 1155063604
commit 1ef7c99d14
11 changed files with 1718 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

102
drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
View File

@@ -364,6 +364,102 @@ int msm_dsi_dphy_timing_calc_v3(struct msm_dsi_dphy_timing *timing,
return 0;
}
int msm_dsi_dphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
struct msm_dsi_phy_clk_request *clk_req)
{
const unsigned long bit_rate = clk_req->bitclk_rate;
const unsigned long esc_rate = clk_req->escclk_rate;
s32 ui, ui_x8;
s32 tmax, tmin;
s32 pcnt_clk_prep = 50;
s32 pcnt_clk_zero = 2;
s32 pcnt_clk_trail = 30;
s32 pcnt_hs_prep = 50;
s32 pcnt_hs_zero = 10;
s32 pcnt_hs_trail = 30;
s32 pcnt_hs_exit = 10;
s32 coeff = 1000; /* Precision, should avoid overflow */
s32 hb_en;
s32 temp;
if (!bit_rate || !esc_rate)
return -EINVAL;
hb_en = 0;
ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000);
ui_x8 = ui << 3;
/* TODO: verify these calculations against latest downstream driver
* everything except clk_post/clk_pre uses calculations from v3 based
* on the downstream driver having the same calculations for v3 and v4
*/
temp = S_DIV_ROUND_UP(38 * coeff, ui_x8);
tmin = max_t(s32, temp, 0);
temp = (95 * coeff) / ui_x8;
tmax = max_t(s32, temp, 0);
timing->clk_prepare = linear_inter(tmax, tmin, pcnt_clk_prep, 0, false);
temp = 300 * coeff - (timing->clk_prepare << 3) * ui;
tmin = S_DIV_ROUND_UP(temp, ui_x8) - 1;
tmax = (tmin > 255) ? 511 : 255;
timing->clk_zero = linear_inter(tmax, tmin, pcnt_clk_zero, 0, false);
tmin = DIV_ROUND_UP(60 * coeff + 3 * ui, ui_x8);
temp = 105 * coeff + 12 * ui - 20 * coeff;
tmax = (temp + 3 * ui) / ui_x8;
timing->clk_trail = linear_inter(tmax, tmin, pcnt_clk_trail, 0, false);
temp = S_DIV_ROUND_UP(40 * coeff + 4 * ui, ui_x8);
tmin = max_t(s32, temp, 0);
temp = (85 * coeff + 6 * ui) / ui_x8;
tmax = max_t(s32, temp, 0);
timing->hs_prepare = linear_inter(tmax, tmin, pcnt_hs_prep, 0, false);
temp = 145 * coeff + 10 * ui - (timing->hs_prepare << 3) * ui;
tmin = S_DIV_ROUND_UP(temp, ui_x8) - 1;
tmax = 255;
timing->hs_zero = linear_inter(tmax, tmin, pcnt_hs_zero, 0, false);
tmin = DIV_ROUND_UP(60 * coeff + 4 * ui, ui_x8) - 1;
temp = 105 * coeff + 12 * ui - 20 * coeff;
tmax = (temp / ui_x8) - 1;
timing->hs_trail = linear_inter(tmax, tmin, pcnt_hs_trail, 0, false);
temp = 50 * coeff + ((hb_en << 2) - 8) * ui;
timing->hs_rqst = S_DIV_ROUND_UP(temp, ui_x8);
tmin = DIV_ROUND_UP(100 * coeff, ui_x8) - 1;
tmax = 255;
timing->hs_exit = linear_inter(tmax, tmin, pcnt_hs_exit, 0, false);
/* recommended min
* = roundup((mipi_min_ns + t_hs_trail_ns)/(16*bit_clk_ns), 0) - 1
*/
temp = 60 * coeff + 52 * ui + + (timing->hs_trail + 1) * ui_x8;
tmin = DIV_ROUND_UP(temp, 16 * ui) - 1;
tmax = 255;
timing->shared_timings.clk_post = linear_inter(tmax, tmin, 5, 0, false);
/* recommended min
* val1 = (tlpx_ns + clk_prepare_ns + clk_zero_ns + hs_rqst_ns)
* val2 = (16 * bit_clk_ns)
* final = roundup(val1/val2, 0) - 1
*/
temp = 52 * coeff + (timing->clk_prepare + timing->clk_zero + 1) * ui_x8 + 54 * coeff;
tmin = DIV_ROUND_UP(temp, 16 * ui) - 1;
tmax = 255;
timing->shared_timings.clk_pre = DIV_ROUND_UP((tmax - tmin) * 125, 10000) + tmin;
DBG("%d, %d, %d, %d, %d, %d, %d, %d, %d, %d",
timing->shared_timings.clk_pre, timing->shared_timings.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)
{
@@ -507,6 +603,12 @@ static const struct of_device_id dsi_phy_dt_match[] = {
.data = &dsi_phy_10nm_cfgs },
{ .compatible = "qcom,dsi-phy-10nm-8998",
.data = &dsi_phy_10nm_8998_cfgs },
#endif
#ifdef CONFIG_DRM_MSM_DSI_7NM_PHY
{ .compatible = "qcom,dsi-phy-7nm",
.data = &dsi_phy_7nm_cfgs },
{ .compatible = "qcom,dsi-phy-7nm-8150",
.data = &dsi_phy_7nm_8150_cfgs },
#endif
{}
};

4
drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
View File

@@ -48,6 +48,8 @@ extern const struct msm_dsi_phy_cfg dsi_phy_14nm_cfgs;
extern const struct msm_dsi_phy_cfg dsi_phy_14nm_660_cfgs;
extern const struct msm_dsi_phy_cfg dsi_phy_10nm_cfgs;
extern const struct msm_dsi_phy_cfg dsi_phy_10nm_8998_cfgs;
extern const struct msm_dsi_phy_cfg dsi_phy_7nm_cfgs;
extern const struct msm_dsi_phy_cfg dsi_phy_7nm_8150_cfgs;
struct msm_dsi_dphy_timing {
u32 clk_zero;
@@ -100,6 +102,8 @@ int msm_dsi_dphy_timing_calc_v2(struct msm_dsi_dphy_timing *timing,
struct msm_dsi_phy_clk_request *clk_req);
int msm_dsi_dphy_timing_calc_v3(struct msm_dsi_dphy_timing *timing,
struct msm_dsi_phy_clk_request *clk_req);
int msm_dsi_dphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
struct msm_dsi_phy_clk_request *clk_req);
void msm_dsi_phy_set_src_pll(struct msm_dsi_phy *phy, int pll_id, u32 reg,
u32 bit_mask);
int msm_dsi_phy_init_common(struct msm_dsi_phy *phy);

255
drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c Normal file
View File

@@ -0,0 +1,255 @@
/*
* SPDX-License-Identifier: GPL-2.0
* Copyright (c) 2018, The Linux Foundation
*/
#include <linux/iopoll.h>
#include "dsi_phy.h"
#include "dsi.xml.h"
static int dsi_phy_hw_v4_0_is_pll_on(struct msm_dsi_phy *phy)
{
void __iomem *base = phy->base;
u32 data = 0;
data = dsi_phy_read(base + REG_DSI_7nm_PHY_CMN_PLL_CNTRL);
mb(); /* make sure read happened */
return (data & BIT(0));
}
static void dsi_phy_hw_v4_0_config_lpcdrx(struct msm_dsi_phy *phy, bool enable)
{
void __iomem *lane_base = phy->lane_base;
int phy_lane_0 = 0; /* TODO: Support all lane swap configs */
/*
* LPRX and CDRX need to enabled only for physical data lane
* corresponding to the logical data lane 0
*/
if (enable)
dsi_phy_write(lane_base +
REG_DSI_7nm_PHY_LN_LPRX_CTRL(phy_lane_0), 0x3);
else
dsi_phy_write(lane_base +
REG_DSI_7nm_PHY_LN_LPRX_CTRL(phy_lane_0), 0);
}
static void dsi_phy_hw_v4_0_lane_settings(struct msm_dsi_phy *phy)
{
int i;
const u8 tx_dctrl_0[] = { 0x00, 0x00, 0x00, 0x04, 0x01 };
const u8 tx_dctrl_1[] = { 0x40, 0x40, 0x40, 0x46, 0x41 };
const u8 *tx_dctrl = tx_dctrl_0;
void __iomem *lane_base = phy->lane_base;
if (phy->cfg->type == MSM_DSI_PHY_7NM_V4_1)
tx_dctrl = tx_dctrl_1;
/* Strength ctrl settings */
for (i = 0; i < 5; i++) {
/*
* Disable LPRX and CDRX for all lanes. And later on, it will
* be only enabled for the physical data lane corresponding
* to the logical data lane 0
*/
dsi_phy_write(lane_base + REG_DSI_7nm_PHY_LN_LPRX_CTRL(i), 0);
dsi_phy_write(lane_base + REG_DSI_7nm_PHY_LN_PIN_SWAP(i), 0x0);
}
dsi_phy_hw_v4_0_config_lpcdrx(phy, true);
/* other settings */
for (i = 0; i < 5; i++) {
dsi_phy_write(lane_base + REG_DSI_7nm_PHY_LN_CFG0(i), 0x0);
dsi_phy_write(lane_base + REG_DSI_7nm_PHY_LN_CFG1(i), 0x0);
dsi_phy_write(lane_base + REG_DSI_7nm_PHY_LN_CFG2(i), i == 4 ? 0x8a : 0xa);
dsi_phy_write(lane_base + REG_DSI_7nm_PHY_LN_TX_DCTRL(i), tx_dctrl[i]);
}
}
static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
struct msm_dsi_phy_clk_request *clk_req)
{
int ret;
u32 status;
u32 const delay_us = 5;
u32 const timeout_us = 1000;
struct msm_dsi_dphy_timing *timing = &phy->timing;
void __iomem *base = phy->base;
bool less_than_1500_mhz;
u32 vreg_ctrl_0, glbl_str_swi_cal_sel_ctrl, glbl_hstx_str_ctrl_0;
u32 glbl_rescode_top_ctrl, glbl_rescode_bot_ctrl;
u32 data;
DBG("");
if (msm_dsi_dphy_timing_calc_v4(timing, clk_req)) {
DRM_DEV_ERROR(&phy->pdev->dev,
"%s: D-PHY timing calculation failed\n", __func__);
return -EINVAL;
}
if (dsi_phy_hw_v4_0_is_pll_on(phy))
pr_warn("PLL turned on before configuring PHY\n");
/* wait for REFGEN READY */
ret = readl_poll_timeout_atomic(base + REG_DSI_7nm_PHY_CMN_PHY_STATUS,
status, (status & BIT(0)),
delay_us, timeout_us);
if (ret) {
pr_err("Ref gen not ready. Aborting\n");
return -EINVAL;
}
/* TODO: CPHY enable path (this is for DPHY only) */
/* Alter PHY configurations if data rate less than 1.5GHZ*/
less_than_1500_mhz = (clk_req->bitclk_rate <= 1500000000);
if (phy->cfg->type == MSM_DSI_PHY_7NM_V4_1) {
vreg_ctrl_0 = less_than_1500_mhz ? 0x53 : 0x52;
glbl_rescode_top_ctrl = less_than_1500_mhz ? 0x3d : 0x00;
glbl_rescode_bot_ctrl = less_than_1500_mhz ? 0x39 : 0x3c;
glbl_str_swi_cal_sel_ctrl = 0x00;
glbl_hstx_str_ctrl_0 = 0x88;
} else {
vreg_ctrl_0 = less_than_1500_mhz ? 0x5B : 0x59;
glbl_str_swi_cal_sel_ctrl = less_than_1500_mhz ? 0x03 : 0x00;
glbl_hstx_str_ctrl_0 = less_than_1500_mhz ? 0x66 : 0x88;
glbl_rescode_top_ctrl = 0x03;
glbl_rescode_bot_ctrl = 0x3c;
}
/* de-assert digital and pll power down */
data = BIT(6) | BIT(5);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_0, data);
/* Assert PLL core reset */
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_PLL_CNTRL, 0x00);
/* turn off resync FIFO */
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_RBUF_CTRL, 0x00);
/* program CMN_CTRL_4 for minor_ver 2 chipsets*/
data = dsi_phy_read(base + REG_DSI_7nm_PHY_CMN_REVISION_ID0);
data = data & (0xf0);
if (data == 0x20)
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_4, 0x04);
/* Configure PHY lane swap (TODO: we need to calculate this) */
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CFG0, 0x21);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CFG1, 0x84);
/* Enable LDO */
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_VREG_CTRL_0, vreg_ctrl_0);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_VREG_CTRL_1, 0x5c);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_3, 0x00);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_STR_SWI_CAL_SEL_CTRL,
glbl_str_swi_cal_sel_ctrl);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_HSTX_STR_CTRL_0,
glbl_hstx_str_ctrl_0);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_PEMPH_CTRL_0, 0x00);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_RESCODE_OFFSET_TOP_CTRL,
glbl_rescode_top_ctrl);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_RESCODE_OFFSET_BOT_CTRL,
glbl_rescode_bot_ctrl);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_LPTX_STR_CTRL, 0x55);
/* Remove power down from all blocks */
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_0, 0x7f);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CTRL0, 0x1f);
/* Select full-rate mode */
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_2, 0x40);
ret = msm_dsi_pll_set_usecase(phy->pll, phy->usecase);
if (ret) {
DRM_DEV_ERROR(&phy->pdev->dev, "%s: set pll usecase failed, %d\n",
__func__, ret);
return ret;
}
/* DSI PHY timings */
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_0, 0x00);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_1, timing->clk_zero);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_2, timing->clk_prepare);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_3, timing->clk_trail);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_4, timing->hs_exit);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_5, timing->hs_zero);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_6, timing->hs_prepare);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_7, timing->hs_trail);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_8, timing->hs_rqst);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_9, 0x02);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_10, 0x04);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_11, 0x00);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_12,
timing->shared_timings.clk_pre);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_13,
timing->shared_timings.clk_post);
/* DSI lane settings */
dsi_phy_hw_v4_0_lane_settings(phy);
DBG("DSI%d PHY enabled", phy->id);
return 0;
}
static void dsi_7nm_phy_disable(struct msm_dsi_phy *phy)
{
/* TODO */
}
static int dsi_7nm_phy_init(struct msm_dsi_phy *phy)
{
struct platform_device *pdev = phy->pdev;
phy->lane_base = msm_ioremap(pdev, "dsi_phy_lane",
"DSI_PHY_LANE");
if (IS_ERR(phy->lane_base)) {
DRM_DEV_ERROR(&pdev->dev, "%s: failed to map phy lane base\n",
__func__);
return -ENOMEM;
}
return 0;
}
const struct msm_dsi_phy_cfg dsi_phy_7nm_cfgs = {
.type = MSM_DSI_PHY_7NM_V4_1,
.src_pll_truthtable = { {false, false}, {true, false} },
.reg_cfg = {
.num = 1,
.regs = {
{"vdds", 36000, 32},
},
},
.ops = {
.enable = dsi_7nm_phy_enable,
.disable = dsi_7nm_phy_disable,
.init = dsi_7nm_phy_init,
},
.io_start = { 0xae94400, 0xae96400 },
.num_dsi_phy = 2,
};
const struct msm_dsi_phy_cfg dsi_phy_7nm_8150_cfgs = {
.type = MSM_DSI_PHY_7NM,
.src_pll_truthtable = { {false, false}, {true, false} },
.reg_cfg = {
.num = 1,
.regs = {
{"vdds", 36000, 32},
},
},
.ops = {
.enable = dsi_7nm_phy_enable,
.disable = dsi_7nm_phy_disable,
.init = dsi_7nm_phy_init,
},
.io_start = { 0xae94400, 0xae96400 },
.num_dsi_phy = 2,
};