[PATCH v25 4/7] soc: mediatek: SVS: add monitor mode
Roger Lu
roger.lu at mediatek.com
Sun May 15 17:43:08 PDT 2022
SVS monitor mode is based on different thermal temperature
to provide suitable SVS bank voltages.
Signed-off-by: Roger Lu <roger.lu at mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
Reviewed-by: Kevin Hilman <khilman at baylibre.com>
---
drivers/soc/mediatek/mtk-svs.c | 256 ++++++++++++++++++++++++++++++++-
1 file changed, 250 insertions(+), 6 deletions(-)
diff --git a/drivers/soc/mediatek/mtk-svs.c b/drivers/soc/mediatek/mtk-svs.c
index cc23a701159e..44ccad1e3327 100644
--- a/drivers/soc/mediatek/mtk-svs.c
+++ b/drivers/soc/mediatek/mtk-svs.c
@@ -25,6 +25,7 @@
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
+#include <linux/thermal.h>
/* svs bank 1-line software id */
#define SVSB_CPU_LITTLE BIT(0)
@@ -36,6 +37,7 @@
#define SVSB_MODE_ALL_DISABLE 0
#define SVSB_MODE_INIT01 BIT(1)
#define SVSB_MODE_INIT02 BIT(2)
+#define SVSB_MODE_MON BIT(3)
/* svs bank volt flags */
#define SVSB_INIT01_PD_REQ BIT(0)
@@ -49,16 +51,21 @@
#define SVSB_DTLO 0xfe
#define SVSB_EN_INIT01 0x1
#define SVSB_EN_INIT02 0x5
+#define SVSB_EN_MON 0x2
#define SVSB_EN_OFF 0x0
#define SVSB_INTEN_INIT0x 0x00005f01
+#define SVSB_INTEN_MONVOPEN 0x00ff0000
#define SVSB_INTSTS_CLEAN 0x00ffffff
#define SVSB_INTSTS_COMPLETE 0x1
+#define SVSB_INTSTS_MONVOP 0x00ff0000
#define SVSB_RUNCONFIG_DEFAULT 0x80000000
/* svs bank related setting */
#define MAX_OPP_ENTRIES 16
#define SVSB_DC_SIGNED_BIT BIT(15)
#define SVSB_DET_CLK_EN BIT(31)
+#define SVSB_TEMP_LOWER_BOUND 0xb2
+#define SVSB_TEMP_UPPER_BOUND 0x64
static DEFINE_SPINLOCK(svs_lock);
@@ -67,6 +74,7 @@ static DEFINE_SPINLOCK(svs_lock);
* @SVSB_PHASE_ERROR: svs bank encounters unexpected condition
* @SVSB_PHASE_INIT01: svs bank basic init for data calibration
* @SVSB_PHASE_INIT02: svs bank can provide voltages to opp table
+ * @SVSB_PHASE_MON: svs bank can provide voltages with thermal effect
* @SVSB_PHASE_MAX: total number of svs bank phase (debug purpose)
*
* Each svs bank has its own independent phase and we enable each svs bank by
@@ -74,12 +82,13 @@ static DEFINE_SPINLOCK(svs_lock);
* condition, it will fire an irq (PHASE_ERROR) to inform svs software.
*
* svs bank general phase-enabled order:
- * SVSB_PHASE_INIT01 -> SVSB_PHASE_INIT02
+ * SVSB_PHASE_INIT01 -> SVSB_PHASE_INIT02 -> SVSB_PHASE_MON
*/
enum svsb_phase {
SVSB_PHASE_ERROR = 0,
SVSB_PHASE_INIT01,
SVSB_PHASE_INIT02,
+ SVSB_PHASE_MON,
SVSB_PHASE_MAX,
};
@@ -210,9 +219,11 @@ static const u32 svs_regs_v2[] = {
* @probe: svs platform probe function pointer
* @irqflags: svs platform irq settings flags
* @efuse_max: total number of svs efuse
+ * @tefuse_max: total number of thermal efuse
* @regs: svs platform registers map
* @bank_max: total number of svs banks
* @efuse: svs efuse data received from NVMEM framework
+ * @tefuse: thermal efuse data received from NVMEM framework
*/
struct svs_platform {
char *name;
@@ -225,9 +236,11 @@ struct svs_platform {
int (*probe)(struct svs_platform *svsp);
unsigned long irqflags;
size_t efuse_max;
+ size_t tefuse_max;
const u32 *regs;
u32 bank_max;
u32 *efuse;
+ u32 *tefuse;
};
struct svs_platform_data {
@@ -246,11 +259,13 @@ struct svs_platform_data {
* @opp_dev: device for opp table/buck control
* @init_completion: the timeout completion for bank init
* @buck: regulator used by opp_dev
+ * @tzd: thermal zone device for getting temperature
* @lock: mutex lock to protect voltage update process
* @set_freq_pct: function pointer to set bank frequency percent table
* @get_volts: function pointer to get bank voltages
* @name: bank name
* @buck_name: regulator name
+ * @tzone_name: thermal zone name
* @phase: bank current phase
* @volt_od: bank voltage overdrive
* @pm_runtime_enabled_count: bank pm runtime enabled count
@@ -279,6 +294,13 @@ struct svs_platform_data {
* @sw_id: bank software identification
* @cpu_id: cpu core id for SVS CPU bank use only
* @ctl0: TS-x selection
+ * @temp: bank temperature
+ * @tzone_htemp: thermal zone high temperature threshold
+ * @tzone_htemp_voffset: thermal zone high temperature voltage offset
+ * @tzone_ltemp: thermal zone low temperature threshold
+ * @tzone_ltemp_voffset: thermal zone low temperature voltage offset
+ * @bts: svs efuse data
+ * @mts: svs efuse data
* @bdes: svs efuse data
* @mdes: svs efuse data
* @mtdes: svs efuse data
@@ -295,11 +317,13 @@ struct svs_bank {
struct device *opp_dev;
struct completion init_completion;
struct regulator *buck;
+ struct thermal_zone_device *tzd;
struct mutex lock; /* lock to protect voltage update process */
void (*set_freq_pct)(struct svs_platform *svsp);
void (*get_volts)(struct svs_platform *svsp);
char *name;
char *buck_name;
+ char *tzone_name;
enum svsb_phase phase;
s32 volt_od;
u32 pm_runtime_enabled_count;
@@ -328,6 +352,13 @@ struct svs_bank {
u32 sw_id;
u32 cpu_id;
u32 ctl0;
+ u32 temp;
+ u32 tzone_htemp;
+ u32 tzone_htemp_voffset;
+ u32 tzone_ltemp;
+ u32 tzone_ltemp_voffset;
+ u32 bts;
+ u32 mts;
u32 bdes;
u32 mdes;
u32 mtdes;
@@ -370,11 +401,27 @@ static u32 svs_bank_volt_to_opp_volt(u32 svsb_volt, u32 svsb_volt_step,
static int svs_adjust_pm_opp_volts(struct svs_bank *svsb)
{
- int ret = -EPERM;
- u32 i, svsb_volt, opp_volt;
+ int ret = -EPERM, tzone_temp = 0;
+ u32 i, svsb_volt, opp_volt, temp_voffset = 0;
mutex_lock(&svsb->lock);
+ /* Get thermal effect */
+ if (svsb->phase == SVSB_PHASE_MON) {
+ ret = thermal_zone_get_temp(svsb->tzd, &tzone_temp);
+ if (ret || (svsb->temp > SVSB_TEMP_UPPER_BOUND &&
+ svsb->temp < SVSB_TEMP_LOWER_BOUND)) {
+ dev_err(svsb->dev, "%s: %d (0x%x), run default volts\n",
+ svsb->tzone_name, ret, svsb->temp);
+ svsb->phase = SVSB_PHASE_ERROR;
+ }
+
+ if (tzone_temp >= svsb->tzone_htemp)
+ temp_voffset += svsb->tzone_htemp_voffset;
+ else if (tzone_temp <= svsb->tzone_ltemp)
+ temp_voffset += svsb->tzone_ltemp_voffset;
+ }
+
/* vmin <= svsb_volt (opp_volt) <= default opp voltage */
for (i = 0; i < svsb->opp_count; i++) {
switch (svsb->phase) {
@@ -390,6 +437,12 @@ static int svs_adjust_pm_opp_volts(struct svs_bank *svsb)
svsb->volt_step,
svsb->volt_base);
break;
+ case SVSB_PHASE_MON:
+ svsb_volt = max(svsb->volt[i] + temp_voffset, svsb->vmin);
+ opp_volt = svs_bank_volt_to_opp_volt(svsb_volt,
+ svsb->volt_step,
+ svsb->volt_base);
+ break;
default:
dev_err(svsb->dev, "unknown phase: %u\n", svsb->phase);
ret = -EINVAL;
@@ -484,7 +537,7 @@ static void svs_set_bank_phase(struct svs_platform *svsp,
enum svsb_phase target_phase)
{
struct svs_bank *svsb = svsp->pbank;
- u32 des_char, temp_char, det_char, limit_vals, init2vals;
+ u32 des_char, temp_char, det_char, limit_vals, init2vals, ts_calcs;
svs_switch_bank(svsp);
@@ -525,6 +578,12 @@ static void svs_set_bank_phase(struct svs_platform *svsp,
svs_writel_relaxed(svsp, init2vals, INIT2VALS);
svs_writel_relaxed(svsp, SVSB_EN_INIT02, SVSEN);
break;
+ case SVSB_PHASE_MON:
+ ts_calcs = (svsb->bts << 12) | svsb->mts;
+ svs_writel_relaxed(svsp, ts_calcs, TSCALCS);
+ svs_writel_relaxed(svsp, SVSB_INTEN_MONVOPEN, INTEN);
+ svs_writel_relaxed(svsp, SVSB_EN_MON, SVSEN);
+ break;
default:
dev_err(svsb->dev, "requested unknown target phase: %u\n",
target_phase);
@@ -544,6 +603,7 @@ static inline void svs_error_isr_handler(struct svs_platform *svsp)
dev_err(svsb->dev, "SMSTATE0 = 0x%08x, SMSTATE1 = 0x%08x\n",
svs_readl_relaxed(svsp, SMSTATE0),
svs_readl_relaxed(svsp, SMSTATE1));
+ dev_err(svsb->dev, "TEMP = 0x%08x\n", svs_readl_relaxed(svsp, TEMP));
svsb->phase = SVSB_PHASE_ERROR;
svs_writel_relaxed(svsp, SVSB_EN_OFF, SVSEN);
@@ -591,6 +651,17 @@ static inline void svs_init02_isr_handler(struct svs_platform *svsp)
svs_writel_relaxed(svsp, SVSB_INTSTS_COMPLETE, INTSTS);
}
+static inline void svs_mon_mode_isr_handler(struct svs_platform *svsp)
+{
+ struct svs_bank *svsb = svsp->pbank;
+
+ svsb->phase = SVSB_PHASE_MON;
+ svsb->get_volts(svsp);
+
+ svsb->temp = svs_readl_relaxed(svsp, TEMP) & GENMASK(7, 0);
+ svs_writel_relaxed(svsp, SVSB_INTSTS_MONVOP, INTSTS);
+}
+
static irqreturn_t svs_isr(int irq, void *data)
{
struct svs_platform *svsp = data;
@@ -621,6 +692,8 @@ static irqreturn_t svs_isr(int irq, void *data)
else if (int_sts == SVSB_INTSTS_COMPLETE &&
svs_en == SVSB_EN_INIT02)
svs_init02_isr_handler(svsp);
+ else if (int_sts & SVSB_INTSTS_MONVOP)
+ svs_mon_mode_isr_handler(svsp);
else
svs_error_isr_handler(svsp);
@@ -835,6 +908,25 @@ static int svs_init02(struct svs_platform *svsp)
return 0;
}
+static void svs_mon_mode(struct svs_platform *svsp)
+{
+ struct svs_bank *svsb;
+ unsigned long flags;
+ u32 idx;
+
+ for (idx = 0; idx < svsp->bank_max; idx++) {
+ svsb = &svsp->banks[idx];
+
+ if (!(svsb->mode_support & SVSB_MODE_MON))
+ continue;
+
+ spin_lock_irqsave(&svs_lock, flags);
+ svsp->pbank = svsb;
+ svs_set_bank_phase(svsp, SVSB_PHASE_MON);
+ spin_unlock_irqrestore(&svs_lock, flags);
+ }
+}
+
static int svs_start(struct svs_platform *svsp)
{
int ret;
@@ -847,6 +939,8 @@ static int svs_start(struct svs_platform *svsp)
if (ret)
return ret;
+ svs_mon_mode(svsp);
+
return 0;
}
@@ -892,6 +986,8 @@ static int svs_resume(struct device *dev)
if (ret)
return ret;
+ svs_mon_mode(svsp);
+
return 0;
}
@@ -956,6 +1052,15 @@ static int svs_bank_resource_setup(struct svs_platform *svsp)
}
}
+ if (svsb->mode_support & SVSB_MODE_MON) {
+ svsb->tzd = thermal_zone_get_zone_by_name(svsb->tzone_name);
+ if (IS_ERR(svsb->tzd)) {
+ dev_err(svsb->dev, "cannot get \"%s\" thermal zone\n",
+ svsb->tzone_name);
+ return PTR_ERR(svsb->tzd);
+ }
+ }
+
count = dev_pm_opp_get_opp_count(svsb->opp_dev);
if (svsb->opp_count != count) {
dev_err(svsb->dev,
@@ -986,7 +1091,11 @@ static int svs_bank_resource_setup(struct svs_platform *svsp)
static bool svs_mt8183_efuse_parsing(struct svs_platform *svsp)
{
struct svs_bank *svsb;
- u32 idx, i, ft_pgm;
+ struct nvmem_cell *cell;
+ int format[6], x_roomt[6], o_vtsmcu[5], o_vtsabb, tb_roomt = 0;
+ int adc_ge_t, adc_oe_t, ge, oe, gain, degc_cali, adc_cali_en_t;
+ int o_slope, o_slope_sign, ts_id;
+ u32 idx, i, ft_pgm, mts, temp0, temp1, temp2;
for (i = 0; i < svsp->efuse_max; i++)
if (svsp->efuse[i])
@@ -1062,6 +1171,127 @@ static bool svs_mt8183_efuse_parsing(struct svs_platform *svsp)
}
}
+ /* Get thermal efuse by nvmem */
+ cell = nvmem_cell_get(svsp->dev, "t-calibration-data");
+ if (IS_ERR(cell)) {
+ dev_err(svsp->dev, "no \"t-calibration-data\"? %ld\n",
+ PTR_ERR(cell));
+ goto remove_mt8183_svsb_mon_mode;
+ }
+
+ svsp->tefuse = nvmem_cell_read(cell, &svsp->tefuse_max);
+ if (IS_ERR(svsp->tefuse)) {
+ dev_err(svsp->dev, "cannot read thermal efuse: %ld\n",
+ PTR_ERR(svsp->tefuse));
+ nvmem_cell_put(cell);
+ goto remove_mt8183_svsb_mon_mode;
+ }
+
+ svsp->tefuse_max /= sizeof(u32);
+ nvmem_cell_put(cell);
+
+ /* Thermal efuse parsing */
+ adc_ge_t = (svsp->tefuse[1] >> 22) & GENMASK(9, 0);
+ adc_oe_t = (svsp->tefuse[1] >> 12) & GENMASK(9, 0);
+
+ o_vtsmcu[0] = (svsp->tefuse[0] >> 17) & GENMASK(8, 0);
+ o_vtsmcu[1] = (svsp->tefuse[0] >> 8) & GENMASK(8, 0);
+ o_vtsmcu[2] = svsp->tefuse[1] & GENMASK(8, 0);
+ o_vtsmcu[3] = (svsp->tefuse[2] >> 23) & GENMASK(8, 0);
+ o_vtsmcu[4] = (svsp->tefuse[2] >> 5) & GENMASK(8, 0);
+ o_vtsabb = (svsp->tefuse[2] >> 14) & GENMASK(8, 0);
+
+ degc_cali = (svsp->tefuse[0] >> 1) & GENMASK(5, 0);
+ adc_cali_en_t = svsp->tefuse[0] & BIT(0);
+ o_slope_sign = (svsp->tefuse[0] >> 7) & BIT(0);
+
+ ts_id = (svsp->tefuse[1] >> 9) & BIT(0);
+ o_slope = (svsp->tefuse[0] >> 26) & GENMASK(5, 0);
+
+ if (adc_cali_en_t == 1) {
+ if (!ts_id)
+ o_slope = 0;
+
+ if (adc_ge_t < 265 || adc_ge_t > 758 ||
+ adc_oe_t < 265 || adc_oe_t > 758 ||
+ o_vtsmcu[0] < -8 || o_vtsmcu[0] > 484 ||
+ o_vtsmcu[1] < -8 || o_vtsmcu[1] > 484 ||
+ o_vtsmcu[2] < -8 || o_vtsmcu[2] > 484 ||
+ o_vtsmcu[3] < -8 || o_vtsmcu[3] > 484 ||
+ o_vtsmcu[4] < -8 || o_vtsmcu[4] > 484 ||
+ o_vtsabb < -8 || o_vtsabb > 484 ||
+ degc_cali < 1 || degc_cali > 63) {
+ dev_err(svsp->dev, "bad thermal efuse, no mon mode\n");
+ goto remove_mt8183_svsb_mon_mode;
+ }
+ } else {
+ dev_err(svsp->dev, "no thermal efuse, no mon mode\n");
+ goto remove_mt8183_svsb_mon_mode;
+ }
+
+ ge = ((adc_ge_t - 512) * 10000) / 4096;
+ oe = (adc_oe_t - 512);
+ gain = (10000 + ge);
+
+ format[0] = (o_vtsmcu[0] + 3350 - oe);
+ format[1] = (o_vtsmcu[1] + 3350 - oe);
+ format[2] = (o_vtsmcu[2] + 3350 - oe);
+ format[3] = (o_vtsmcu[3] + 3350 - oe);
+ format[4] = (o_vtsmcu[4] + 3350 - oe);
+ format[5] = (o_vtsabb + 3350 - oe);
+
+ for (i = 0; i < 6; i++)
+ x_roomt[i] = (((format[i] * 10000) / 4096) * 10000) / gain;
+
+ temp0 = (10000 * 100000 / gain) * 15 / 18;
+
+ if (!o_slope_sign)
+ mts = (temp0 * 10) / (1534 + o_slope * 10);
+ else
+ mts = (temp0 * 10) / (1534 - o_slope * 10);
+
+ for (idx = 0; idx < svsp->bank_max; idx++) {
+ svsb = &svsp->banks[idx];
+ svsb->mts = mts;
+
+ switch (svsb->sw_id) {
+ case SVSB_CPU_LITTLE:
+ tb_roomt = x_roomt[3];
+ break;
+ case SVSB_CPU_BIG:
+ tb_roomt = x_roomt[4];
+ break;
+ case SVSB_CCI:
+ tb_roomt = x_roomt[3];
+ break;
+ case SVSB_GPU:
+ tb_roomt = x_roomt[1];
+ break;
+ default:
+ dev_err(svsb->dev, "unknown sw_id: %u\n", svsb->sw_id);
+ goto remove_mt8183_svsb_mon_mode;
+ }
+
+ temp0 = (degc_cali * 10 / 2);
+ temp1 = ((10000 * 100000 / 4096 / gain) *
+ oe + tb_roomt * 10) * 15 / 18;
+
+ if (!o_slope_sign)
+ temp2 = temp1 * 100 / (1534 + o_slope * 10);
+ else
+ temp2 = temp1 * 100 / (1534 - o_slope * 10);
+
+ svsb->bts = (temp0 + temp2 - 250) * 4 / 10;
+ }
+
+ return true;
+
+remove_mt8183_svsb_mon_mode:
+ for (idx = 0; idx < svsp->bank_max; idx++) {
+ svsb = &svsp->banks[idx];
+ svsb->mode_support &= ~SVSB_MODE_MON;
+ }
+
return true;
}
@@ -1145,9 +1375,15 @@ static struct device *svs_add_device_link(struct svs_platform *svsp,
static int svs_mt8183_platform_probe(struct svs_platform *svsp)
{
+ struct device *dev;
struct svs_bank *svsb;
u32 idx;
+ dev = svs_add_device_link(svsp, "thermal");
+ if (IS_ERR(dev))
+ return dev_err_probe(svsp->dev, PTR_ERR(dev),
+ "failed to get thermal device\n");
+
for (idx = 0; idx < svsp->bank_max; idx++) {
svsb = &svsp->banks[idx];
@@ -1253,9 +1489,11 @@ static struct svs_bank svs_mt8183_banks[] = {
.set_freq_pct = svs_set_bank_freq_pct_v2,
.get_volts = svs_get_bank_volts_v2,
.buck_name = "mali",
+ .tzone_name = "tzts2",
.volt_flags = SVSB_INIT01_PD_REQ |
SVSB_INIT01_VOLT_INC_ONLY,
- .mode_support = SVSB_MODE_INIT01 | SVSB_MODE_INIT02,
+ .mode_support = SVSB_MODE_INIT01 | SVSB_MODE_INIT02 |
+ SVSB_MODE_MON,
.opp_count = MAX_OPP_ENTRIES,
.freq_base = 900000000,
.vboot = 0x30,
@@ -1271,6 +1509,10 @@ static struct svs_bank svs_mt8183_banks[] = {
.core_sel = 0x8fff0003,
.int_st = BIT(3),
.ctl0 = 0x00050001,
+ .tzone_htemp = 85000,
+ .tzone_htemp_voffset = 0,
+ .tzone_ltemp = 25000,
+ .tzone_ltemp_voffset = 3,
},
};
@@ -1395,6 +1637,8 @@ static int svs_probe(struct platform_device *pdev)
svs_probe_free_resource:
if (!IS_ERR_OR_NULL(svsp->efuse))
kfree(svsp->efuse);
+ if (!IS_ERR_OR_NULL(svsp->tefuse))
+ kfree(svsp->tefuse);
return ret;
}
--
2.18.0
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