diff options
Diffstat (limited to 'drivers/gpu/drm/msm/dsi/phy/dsi_phy_14nm.c')
| -rw-r--r-- | drivers/gpu/drm/msm/dsi/phy/dsi_phy_14nm.c | 975 |
1 files changed, 951 insertions, 24 deletions
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_14nm.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_14nm.c index c3a61876470f..8199c53567f4 100644 --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_14nm.c +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_14nm.c @@ -3,11 +3,905 @@ * Copyright (c) 2016, The Linux Foundation. All rights reserved. */ +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/delay.h> + #include "dsi_phy.h" #include "dsi.xml.h" +#include "dsi_phy_14nm.xml.h" #define PHY_14NM_CKLN_IDX 4 +/* + * DSI PLL 14nm - clock diagram (eg: DSI0): + * + * dsi0n1_postdiv_clk + * | + * | + * +----+ | +----+ + * dsi0vco_clk ---| n1 |--o--| /8 |-- dsi0pllbyte + * +----+ | +----+ + * | dsi0n1_postdivby2_clk + * | +----+ | + * o---| /2 |--o--|\ + * | +----+ | \ +----+ + * | | |--| n2 |-- dsi0pll + * o--------------| / +----+ + * |/ + */ + +#define POLL_MAX_READS 15 +#define POLL_TIMEOUT_US 1000 + +#define VCO_REF_CLK_RATE 19200000 +#define VCO_MIN_RATE 1300000000UL +#define VCO_MAX_RATE 2600000000UL + +struct dsi_pll_config { + u64 vco_current_rate; + + u32 ssc_en; /* SSC enable/disable */ + + /* fixed params */ + u32 plllock_cnt; + u32 ssc_center; + u32 ssc_adj_period; + u32 ssc_spread; + u32 ssc_freq; + + /* calculated */ + u32 dec_start; + u32 div_frac_start; + u32 ssc_period; + u32 ssc_step_size; + u32 plllock_cmp; + u32 pll_vco_div_ref; + u32 pll_vco_count; + u32 pll_kvco_div_ref; + u32 pll_kvco_count; +}; + +struct pll_14nm_cached_state { + unsigned long vco_rate; + u8 n2postdiv; + u8 n1postdiv; +}; + +struct dsi_pll_14nm { + struct clk_hw clk_hw; + + struct msm_dsi_phy *phy; + + /* protects REG_DSI_14nm_PHY_CMN_CLK_CFG0 register */ + spinlock_t postdiv_lock; + + struct pll_14nm_cached_state cached_state; + + struct dsi_pll_14nm *slave; +}; + +#define to_pll_14nm(x) container_of(x, struct dsi_pll_14nm, clk_hw) + +/* + * Private struct for N1/N2 post-divider clocks. These clocks are similar to + * the generic clk_divider class of clocks. The only difference is that it + * also sets the slave DSI PLL's post-dividers if in bonded DSI mode + */ +struct dsi_pll_14nm_postdiv { + struct clk_hw hw; + + /* divider params */ + u8 shift; + u8 width; + u8 flags; /* same flags as used by clk_divider struct */ + + struct dsi_pll_14nm *pll; +}; + +#define to_pll_14nm_postdiv(_hw) container_of(_hw, struct dsi_pll_14nm_postdiv, hw) + +/* + * Global list of private DSI PLL struct pointers. We need this for bonded DSI + * mode, where the master PLL's clk_ops needs access the slave's private data + */ +static struct dsi_pll_14nm *pll_14nm_list[DSI_MAX]; + +static bool pll_14nm_poll_for_ready(struct dsi_pll_14nm *pll_14nm, + u32 nb_tries, u32 timeout_us) +{ + bool pll_locked = false, pll_ready = false; + void __iomem *base = pll_14nm->phy->pll_base; + u32 tries, val; + + tries = nb_tries; + while (tries--) { + val = dsi_phy_read(base + REG_DSI_14nm_PHY_PLL_RESET_SM_READY_STATUS); + pll_locked = !!(val & BIT(5)); + + if (pll_locked) + break; + + udelay(timeout_us); + } + + if (!pll_locked) + goto out; + + tries = nb_tries; + while (tries--) { + val = dsi_phy_read(base + REG_DSI_14nm_PHY_PLL_RESET_SM_READY_STATUS); + pll_ready = !!(val & BIT(0)); + + if (pll_ready) + break; + + udelay(timeout_us); + } + +out: + DBG("DSI PLL is %slocked, %sready", pll_locked ? "" : "*not* ", pll_ready ? "" : "*not* "); + + return pll_locked && pll_ready; +} + +static void dsi_pll_14nm_config_init(struct dsi_pll_config *pconf) +{ + /* fixed input */ + pconf->plllock_cnt = 1; + + /* + * SSC is enabled by default. We might need DT props for configuring + * some SSC params like PPM and center/down spread etc. + */ + pconf->ssc_en = 1; + pconf->ssc_center = 0; /* down spread by default */ + pconf->ssc_spread = 5; /* PPM / 1000 */ + pconf->ssc_freq = 31500; /* default recommended */ + pconf->ssc_adj_period = 37; +} + +#define CEIL(x, y) (((x) + ((y) - 1)) / (y)) + +static void pll_14nm_ssc_calc(struct dsi_pll_14nm *pll, struct dsi_pll_config *pconf) +{ + u32 period, ssc_period; + u32 ref, rem; + u64 step_size; + + DBG("vco=%lld ref=%d", pconf->vco_current_rate, VCO_REF_CLK_RATE); + + ssc_period = pconf->ssc_freq / 500; + period = (u32)VCO_REF_CLK_RATE / 1000; + ssc_period = CEIL(period, ssc_period); + ssc_period -= 1; + pconf->ssc_period = ssc_period; + + DBG("ssc freq=%d spread=%d period=%d", pconf->ssc_freq, + pconf->ssc_spread, pconf->ssc_period); + + step_size = (u32)pconf->vco_current_rate; + ref = VCO_REF_CLK_RATE; + ref /= 1000; + step_size = div_u64(step_size, ref); + step_size <<= 20; + step_size = div_u64(step_size, 1000); + step_size *= pconf->ssc_spread; + step_size = div_u64(step_size, 1000); + step_size *= (pconf->ssc_adj_period + 1); + + rem = 0; + step_size = div_u64_rem(step_size, ssc_period + 1, &rem); + if (rem) + step_size++; + + DBG("step_size=%lld", step_size); + + step_size &= 0x0ffff; /* take lower 16 bits */ + + pconf->ssc_step_size = step_size; +} + +static void pll_14nm_dec_frac_calc(struct dsi_pll_14nm *pll, struct dsi_pll_config *pconf) +{ + u64 multiplier = BIT(20); + u64 dec_start_multiple, dec_start, pll_comp_val; + u32 duration, div_frac_start; + u64 vco_clk_rate = pconf->vco_current_rate; + u64 fref = VCO_REF_CLK_RATE; + + DBG("vco_clk_rate=%lld ref_clk_rate=%lld", vco_clk_rate, fref); + + dec_start_multiple = div_u64(vco_clk_rate * multiplier, fref); + dec_start = div_u64_rem(dec_start_multiple, multiplier, &div_frac_start); + + pconf->dec_start = (u32)dec_start; + pconf->div_frac_start = div_frac_start; + + if (pconf->plllock_cnt == 0) + duration = 1024; + else if (pconf->plllock_cnt == 1) + duration = 256; + else if (pconf->plllock_cnt == 2) + duration = 128; + else + duration = 32; + + pll_comp_val = duration * dec_start_multiple; + pll_comp_val = div_u64(pll_comp_val, multiplier); + do_div(pll_comp_val, 10); + + pconf->plllock_cmp = (u32)pll_comp_val; +} + +static u32 pll_14nm_kvco_slop(u32 vrate) +{ + u32 slop = 0; + + if (vrate > VCO_MIN_RATE && vrate <= 1800000000UL) + slop = 600; + else if (vrate > 1800000000UL && vrate < 2300000000UL) + slop = 400; + else if (vrate > 2300000000UL && vrate < VCO_MAX_RATE) + slop = 280; + + return slop; +} + +static void pll_14nm_calc_vco_count(struct dsi_pll_14nm *pll, struct dsi_pll_config *pconf) +{ + u64 vco_clk_rate = pconf->vco_current_rate; + u64 fref = VCO_REF_CLK_RATE; + u32 vco_measure_time = 5; + u32 kvco_measure_time = 5; + u64 data; + u32 cnt; + + data = fref * vco_measure_time; + do_div(data, 1000000); + data &= 0x03ff; /* 10 bits */ + data -= 2; + pconf->pll_vco_div_ref = data; + + data = div_u64(vco_clk_rate, 1000000); /* unit is Mhz */ + data *= vco_measure_time; + do_div(data, 10); + pconf->pll_vco_count = data; + + data = fref * kvco_measure_time; + do_div(data, 1000000); + data &= 0x03ff; /* 10 bits */ + data -= 1; + pconf->pll_kvco_div_ref = data; + + cnt = pll_14nm_kvco_slop(vco_clk_rate); + cnt *= 2; + cnt /= 100; + cnt *= kvco_measure_time; + pconf->pll_kvco_count = cnt; +} + +static void pll_db_commit_ssc(struct dsi_pll_14nm *pll, struct dsi_pll_config *pconf) +{ + void __iomem *base = pll->phy->pll_base; + u8 data; + + data = pconf->ssc_adj_period; + data &= 0x0ff; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_SSC_ADJ_PER1, data); + data = (pconf->ssc_adj_period >> 8); + data &= 0x03; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_SSC_ADJ_PER2, data); + + data = pconf->ssc_period; + data &= 0x0ff; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_SSC_PER1, data); + data = (pconf->ssc_period >> 8); + data &= 0x0ff; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_SSC_PER2, data); + + data = pconf->ssc_step_size; + data &= 0x0ff; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_SSC_STEP_SIZE1, data); + data = (pconf->ssc_step_size >> 8); + data &= 0x0ff; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_SSC_STEP_SIZE2, data); + + data = (pconf->ssc_center & 0x01); + data <<= 1; + data |= 0x01; /* enable */ + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_SSC_EN_CENTER, data); + + wmb(); /* make sure register committed */ +} + +static void pll_db_commit_common(struct dsi_pll_14nm *pll, + struct dsi_pll_config *pconf) +{ + void __iomem *base = pll->phy->pll_base; + u8 data; + + /* confgiure the non frequency dependent pll registers */ + data = 0; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_SYSCLK_EN_RESET, data); + + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_TXCLK_EN, 1); + + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_RESETSM_CNTRL, 48); + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_RESETSM_CNTRL2, 4 << 3); /* bandgap_timer */ + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_RESETSM_CNTRL5, 5); /* pll_wakeup_timer */ + + data = pconf->pll_vco_div_ref & 0xff; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_VCO_DIV_REF1, data); + data = (pconf->pll_vco_div_ref >> 8) & 0x3; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_VCO_DIV_REF2, data); + + data = pconf->pll_kvco_div_ref & 0xff; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_KVCO_DIV_REF1, data); + data = (pconf->pll_kvco_div_ref >> 8) & 0x3; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_KVCO_DIV_REF2, data); + + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_PLL_MISC1, 16); + + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_IE_TRIM, 4); + + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_IP_TRIM, 4); + + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_CP_SET_CUR, 1 << 3 | 1); + + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_PLL_ICPCSET, 0 << 3 | 0); + + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_PLL_ICPMSET, 0 << 3 | 0); + + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_PLL_ICP_SET, 4 << 3 | 4); + + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_PLL_LPF1, 1 << 4 | 11); + + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_IPTAT_TRIM, 7); + + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_PLL_CRCTRL, 1 << 4 | 2); +} + +static void pll_14nm_software_reset(struct dsi_pll_14nm *pll_14nm) +{ + void __iomem *cmn_base = pll_14nm->phy->base; + + /* de assert pll start and apply pll sw reset */ + + /* stop pll */ + dsi_phy_write(cmn_base + REG_DSI_14nm_PHY_CMN_PLL_CNTRL, 0); + + /* pll sw reset */ + dsi_phy_write_udelay(cmn_base + REG_DSI_14nm_PHY_CMN_CTRL_1, 0x20, 10); + wmb(); /* make sure register committed */ + + dsi_phy_write(cmn_base + REG_DSI_14nm_PHY_CMN_CTRL_1, 0); + wmb(); /* make sure register committed */ +} + +static void pll_db_commit_14nm(struct dsi_pll_14nm *pll, + struct dsi_pll_config *pconf) +{ + void __iomem *base = pll->phy->pll_base; + void __iomem *cmn_base = pll->phy->base; + u8 data; + + DBG("DSI%d PLL", pll->phy->id); + + dsi_phy_write(cmn_base + REG_DSI_14nm_PHY_CMN_LDO_CNTRL, 0x3c); + + pll_db_commit_common(pll, pconf); + + pll_14nm_software_reset(pll); + + /* Use the /2 path in Mux */ + dsi_phy_write(cmn_base + REG_DSI_14nm_PHY_CMN_CLK_CFG1, 1); + + data = 0xff; /* data, clk, pll normal operation */ + dsi_phy_write(cmn_base + REG_DSI_14nm_PHY_CMN_CTRL_0, data); + + /* configure the frequency dependent pll registers */ + data = pconf->dec_start; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_DEC_START, data); + + data = pconf->div_frac_start & 0xff; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START1, data); + data = (pconf->div_frac_start >> 8) & 0xff; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START2, data); + data = (pconf->div_frac_start >> 16) & 0xf; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START3, data); + + data = pconf->plllock_cmp & 0xff; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_PLLLOCK_CMP1, data); + + data = (pconf->plllock_cmp >> 8) & 0xff; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_PLLLOCK_CMP2, data); + + data = (pconf->plllock_cmp >> 16) & 0x3; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_PLLLOCK_CMP3, data); + + data = pconf->plllock_cnt << 1 | 0 << 3; /* plllock_rng */ + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_PLLLOCK_CMP_EN, data); + + data = pconf->pll_vco_count & 0xff; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_VCO_COUNT1, data); + data = (pconf->pll_vco_count >> 8) & 0xff; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_VCO_COUNT2, data); + + data = pconf->pll_kvco_count & 0xff; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_KVCO_COUNT1, data); + data = (pconf->pll_kvco_count >> 8) & 0x3; + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_KVCO_COUNT2, data); + + /* + * High nibble configures the post divider internal to the VCO. It's + * fixed to divide by 1 for now. + * + * 0: divided by 1 + * 1: divided by 2 + * 2: divided by 4 + * 3: divided by 8 + */ + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_PLL_LPF2_POSTDIV, 0 << 4 | 3); + + if (pconf->ssc_en) + pll_db_commit_ssc(pll, pconf); + + wmb(); /* make sure register committed */ +} + +/* + * VCO clock Callbacks + */ +static int dsi_pll_14nm_vco_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct dsi_pll_14nm *pll_14nm = to_pll_14nm(hw); + struct dsi_pll_config conf; + + DBG("DSI PLL%d rate=%lu, parent's=%lu", pll_14nm->phy->id, rate, + parent_rate); + + dsi_pll_14nm_config_init(&conf); + conf.vco_current_rate = rate; + + pll_14nm_dec_frac_calc(pll_14nm, &conf); + + if (conf.ssc_en) + pll_14nm_ssc_calc(pll_14nm, &conf); + + pll_14nm_calc_vco_count(pll_14nm, &conf); + + /* commit the slave DSI PLL registers if we're master. Note that we + * don't lock the slave PLL. We just ensure that the PLL/PHY registers + * of the master and slave are identical + */ + if (pll_14nm->phy->usecase == MSM_DSI_PHY_MASTER) { + struct dsi_pll_14nm *pll_14nm_slave = pll_14nm->slave; + + pll_db_commit_14nm(pll_14nm_slave, &conf); + } + + pll_db_commit_14nm(pll_14nm, &conf); + + return 0; +} + +static unsigned long dsi_pll_14nm_vco_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct dsi_pll_14nm *pll_14nm = to_pll_14nm(hw); + void __iomem *base = pll_14nm->phy->pll_base; + u64 vco_rate, multiplier = BIT(20); + u32 div_frac_start; + u32 dec_start; + u64 ref_clk = parent_rate; + + dec_start = dsi_phy_read(base + REG_DSI_14nm_PHY_PLL_DEC_START); + dec_start &= 0x0ff; + + DBG("dec_start = %x", dec_start); + + div_frac_start = (dsi_phy_read(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START3) + & 0xf) << 16; + div_frac_start |= (dsi_phy_read(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START2) + & 0xff) << 8; + div_frac_start |= dsi_phy_read(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START1) + & 0xff; + + DBG("div_frac_start = %x", div_frac_start); + + vco_rate = ref_clk * dec_start; + + vco_rate += ((ref_clk * div_frac_start) / multiplier); + + /* + * Recalculating the rate from dec_start and frac_start doesn't end up + * the rate we originally set. Convert the freq to KHz, round it up and + * convert it back to MHz. + */ + vco_rate = DIV_ROUND_UP_ULL(vco_rate, 1000) * 1000; + + DBG("returning vco rate = %lu", (unsigned long)vco_rate); + + return (unsigned long)vco_rate; +} + +static int dsi_pll_14nm_vco_prepare(struct clk_hw *hw) +{ + struct dsi_pll_14nm *pll_14nm = to_pll_14nm(hw); + void __iomem *base = pll_14nm->phy->pll_base; + void __iomem *cmn_base = pll_14nm->phy->base; + bool locked; + + DBG(""); + + if (unlikely(pll_14nm->phy->pll_on)) + return 0; + + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_VREF_CFG1, 0x10); + dsi_phy_write(cmn_base + REG_DSI_14nm_PHY_CMN_PLL_CNTRL, 1); + + locked = pll_14nm_poll_for_ready(pll_14nm, POLL_MAX_READS, + POLL_TIMEOUT_US); + + if (unlikely(!locked)) { + DRM_DEV_ERROR(&pll_14nm->phy->pdev->dev, "DSI PLL lock failed\n"); + return -EINVAL; + } + + DBG("DSI PLL lock success"); + pll_14nm->phy->pll_on = true; + + return 0; +} + +static void dsi_pll_14nm_vco_unprepare(struct clk_hw *hw) +{ + struct dsi_pll_14nm *pll_14nm = to_pll_14nm(hw); + void __iomem *cmn_base = pll_14nm->phy->base; + + DBG(""); + + if (unlikely(!pll_14nm->phy->pll_on)) + return; + + dsi_phy_write(cmn_base + REG_DSI_14nm_PHY_CMN_PLL_CNTRL, 0); + + pll_14nm->phy->pll_on = false; +} + +static long dsi_pll_14nm_clk_round_rate(struct clk_hw *hw, + unsigned long rate, unsigned long *parent_rate) +{ + struct dsi_pll_14nm *pll_14nm = to_pll_14nm(hw); + + if (rate < pll_14nm->phy->cfg->min_pll_rate) + return pll_14nm->phy->cfg->min_pll_rate; + else if (rate > pll_14nm->phy->cfg->max_pll_rate) + return pll_14nm->phy->cfg->max_pll_rate; + else + return rate; +} + +static const struct clk_ops clk_ops_dsi_pll_14nm_vco = { + .round_rate = dsi_pll_14nm_clk_round_rate, + .set_rate = dsi_pll_14nm_vco_set_rate, + .recalc_rate = dsi_pll_14nm_vco_recalc_rate, + .prepare = dsi_pll_14nm_vco_prepare, + .unprepare = dsi_pll_14nm_vco_unprepare, +}; + +/* + * N1 and N2 post-divider clock callbacks + */ +#define div_mask(width) ((1 << (width)) - 1) +static unsigned long dsi_pll_14nm_postdiv_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct dsi_pll_14nm_postdiv *postdiv = to_pll_14nm_postdiv(hw); + struct dsi_pll_14nm *pll_14nm = postdiv->pll; + void __iomem *base = pll_14nm->phy->base; + u8 shift = postdiv->shift; + u8 width = postdiv->width; + u32 val; + + DBG("DSI%d PLL parent rate=%lu", pll_14nm->phy->id, parent_rate); + + val = dsi_phy_read(base + REG_DSI_14nm_PHY_CMN_CLK_CFG0) >> shift; + val &= div_mask(width); + + return divider_recalc_rate(hw, parent_rate, val, NULL, + postdiv->flags, width); +} + +static long dsi_pll_14nm_postdiv_round_rate(struct clk_hw *hw, + unsigned long rate, + unsigned long *prate) +{ + struct dsi_pll_14nm_postdiv *postdiv = to_pll_14nm_postdiv(hw); + struct dsi_pll_14nm *pll_14nm = postdiv->pll; + + DBG("DSI%d PLL parent rate=%lu", pll_14nm->phy->id, rate); + + return divider_round_rate(hw, rate, prate, NULL, + postdiv->width, + postdiv->flags); +} + +static int dsi_pll_14nm_postdiv_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct dsi_pll_14nm_postdiv *postdiv = to_pll_14nm_postdiv(hw); + struct dsi_pll_14nm *pll_14nm = postdiv->pll; + void __iomem *base = pll_14nm->phy->base; + spinlock_t *lock = &pll_14nm->postdiv_lock; + u8 shift = postdiv->shift; + u8 width = postdiv->width; + unsigned int value; + unsigned long flags = 0; + u32 val; + + DBG("DSI%d PLL parent rate=%lu parent rate %lu", pll_14nm->phy->id, rate, + parent_rate); + + value = divider_get_val(rate, parent_rate, NULL, postdiv->width, + postdiv->flags); + + spin_lock_irqsave(lock, flags); + + val = dsi_phy_read(base + REG_DSI_14nm_PHY_CMN_CLK_CFG0); + val &= ~(div_mask(width) << shift); + + val |= value << shift; + dsi_phy_write(base + REG_DSI_14nm_PHY_CMN_CLK_CFG0, val); + + /* If we're master in bonded DSI mode, then the slave PLL's post-dividers + * follow the master's post dividers + */ + if (pll_14nm->phy->usecase == MSM_DSI_PHY_MASTER) { + struct dsi_pll_14nm *pll_14nm_slave = pll_14nm->slave; + void __iomem *slave_base = pll_14nm_slave->phy->base; + + dsi_phy_write(slave_base + REG_DSI_14nm_PHY_CMN_CLK_CFG0, val); + } + + spin_unlock_irqrestore(lock, flags); + + return 0; +} + +static const struct clk_ops clk_ops_dsi_pll_14nm_postdiv = { + .recalc_rate = dsi_pll_14nm_postdiv_recalc_rate, + .round_rate = dsi_pll_14nm_postdiv_round_rate, + .set_rate = dsi_pll_14nm_postdiv_set_rate, +}; + +/* + * PLL Callbacks + */ + +static void dsi_14nm_pll_save_state(struct msm_dsi_phy *phy) +{ + struct dsi_pll_14nm *pll_14nm = to_pll_14nm(phy->vco_hw); + struct pll_14nm_cached_state *cached_state = &pll_14nm->cached_state; + void __iomem *cmn_base = pll_14nm->phy->base; + u32 data; + + data = dsi_phy_read(cmn_base + REG_DSI_14nm_PHY_CMN_CLK_CFG0); + + cached_state->n1postdiv = data & 0xf; + cached_state->n2postdiv = (data >> 4) & 0xf; + + DBG("DSI%d PLL save state %x %x", pll_14nm->phy->id, + cached_state->n1postdiv, cached_state->n2postdiv); + + cached_state->vco_rate = clk_hw_get_rate(phy->vco_hw); +} + +static int dsi_14nm_pll_restore_state(struct msm_dsi_phy *phy) +{ + struct dsi_pll_14nm *pll_14nm = to_pll_14nm(phy->vco_hw); + struct pll_14nm_cached_state *cached_state = &pll_14nm->cached_state; + void __iomem *cmn_base = pll_14nm->phy->base; + u32 data; + int ret; + + ret = dsi_pll_14nm_vco_set_rate(phy->vco_hw, + cached_state->vco_rate, 0); + if (ret) { + DRM_DEV_ERROR(&pll_14nm->phy->pdev->dev, + "restore vco rate failed. ret=%d\n", ret); + return ret; + } + + data = cached_state->n1postdiv | (cached_state->n2postdiv << 4); + + DBG("DSI%d PLL restore state %x %x", pll_14nm->phy->id, + cached_state->n1postdiv, cached_state->n2postdiv); + + dsi_phy_write(cmn_base + REG_DSI_14nm_PHY_CMN_CLK_CFG0, data); + + /* also restore post-dividers for slave DSI PLL */ + if (phy->usecase == MSM_DSI_PHY_MASTER) { + struct dsi_pll_14nm *pll_14nm_slave = pll_14nm->slave; + void __iomem *slave_base = pll_14nm_slave->phy->base; + + dsi_phy_write(slave_base + REG_DSI_14nm_PHY_CMN_CLK_CFG0, data); + } + + return 0; +} + +static int dsi_14nm_set_usecase(struct msm_dsi_phy *phy) +{ + struct dsi_pll_14nm *pll_14nm = to_pll_14nm(phy->vco_hw); + void __iomem *base = phy->pll_base; + u32 clkbuflr_en, bandgap = 0; + + switch (phy->usecase) { + case MSM_DSI_PHY_STANDALONE: + clkbuflr_en = 0x1; + break; + case MSM_DSI_PHY_MASTER: + clkbuflr_en = 0x3; + pll_14nm->slave = pll_14nm_list[(pll_14nm->phy->id + 1) % DSI_MAX]; + break; + case MSM_DSI_PHY_SLAVE: + clkbuflr_en = 0x0; + bandgap = 0x3; + break; + default: + return -EINVAL; + } + + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_CLKBUFLR_EN, clkbuflr_en); + if (bandgap) + dsi_phy_write(base + REG_DSI_14nm_PHY_PLL_PLL_BANDGAP, bandgap); + + return 0; +} + +static struct clk_hw *pll_14nm_postdiv_register(struct dsi_pll_14nm *pll_14nm, + const char *name, + const char *parent_name, + unsigned long flags, + u8 shift) +{ + struct dsi_pll_14nm_postdiv *pll_postdiv; + struct device *dev = &pll_14nm->phy->pdev->dev; + struct clk_init_data postdiv_init = { + .parent_names = (const char *[]) { parent_name }, + .num_parents = 1, + .name = name, + .flags = flags, + .ops = &clk_ops_dsi_pll_14nm_postdiv, + }; + int ret; + + pll_postdiv = devm_kzalloc(dev, sizeof(*pll_postdiv), GFP_KERNEL); + if (!pll_postdiv) + return ERR_PTR(-ENOMEM); + + pll_postdiv->pll = pll_14nm; + pll_postdiv->shift = shift; + /* both N1 and N2 postdividers are 4 bits wide */ + pll_postdiv->width = 4; + /* range of each divider is from 1 to 15 */ + pll_postdiv->flags = CLK_DIVIDER_ONE_BASED; + pll_postdiv->hw.init = &postdiv_init; + + ret = devm_clk_hw_register(dev, &pll_postdiv->hw); + if (ret) + return ERR_PTR(ret); + + return &pll_postdiv->hw; +} + +static int pll_14nm_register(struct dsi_pll_14nm *pll_14nm, struct clk_hw **provided_clocks) +{ + char clk_name[32], parent[32], vco_name[32]; + struct clk_init_data vco_init = { + .parent_data = &(const struct clk_parent_data) { + .fw_name = "ref", + }, + .num_parents = 1, + .name = vco_name, + .flags = CLK_IGNORE_UNUSED, + .ops = &clk_ops_dsi_pll_14nm_vco, + }; + struct device *dev = &pll_14nm->phy->pdev->dev; + struct clk_hw *hw; + int ret; + + DBG("DSI%d", pll_14nm->phy->id); + + snprintf(vco_name, 32, "dsi%dvco_clk", pll_14nm->phy->id); + pll_14nm->clk_hw.init = &vco_init; + + ret = devm_clk_hw_register(dev, &pll_14nm->clk_hw); + if (ret) + return ret; + + snprintf(clk_name, 32, "dsi%dn1_postdiv_clk", pll_14nm->phy->id); + snprintf(parent, 32, "dsi%dvco_clk", pll_14nm->phy->id); + + /* N1 postdiv, bits 0-3 in REG_DSI_14nm_PHY_CMN_CLK_CFG0 */ + hw = pll_14nm_postdiv_register(pll_14nm, clk_name, parent, + CLK_SET_RATE_PARENT, 0); + if (IS_ERR(hw)) + return PTR_ERR(hw); + + snprintf(clk_name, 32, "dsi%dpllbyte", pll_14nm->phy->id); + snprintf(parent, 32, "dsi%dn1_postdiv_clk", pll_14nm->phy->id); + + /* DSI Byte clock = VCO_CLK / N1 / 8 */ + hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent, + CLK_SET_RATE_PARENT, 1, 8); + if (IS_ERR(hw)) + return PTR_ERR(hw); + + provided_clocks[DSI_BYTE_PLL_CLK] = hw; + + snprintf(clk_name, 32, "dsi%dn1_postdivby2_clk", pll_14nm->phy->id); + snprintf(parent, 32, "dsi%dn1_postdiv_clk", pll_14nm->phy->id); + + /* + * Skip the mux for now, force DSICLK_SEL to 1, Add a /2 divider + * on the way. Don't let it set parent. + */ + hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent, 0, 1, 2); + if (IS_ERR(hw)) + return PTR_ERR(hw); + + snprintf(clk_name, 32, "dsi%dpll", pll_14nm->phy->id); + snprintf(parent, 32, "dsi%dn1_postdivby2_clk", pll_14nm->phy->id); + + /* DSI pixel clock = VCO_CLK / N1 / 2 / N2 + * This is the output of N2 post-divider, bits 4-7 in + * REG_DSI_14nm_PHY_CMN_CLK_CFG0. Don't let it set parent. + */ + hw = pll_14nm_postdiv_register(pll_14nm, clk_name, parent, 0, 4); + if (IS_ERR(hw)) + return PTR_ERR(hw); + + provided_clocks[DSI_PIXEL_PLL_CLK] = hw; + + return 0; +} + +static int dsi_pll_14nm_init(struct msm_dsi_phy *phy) +{ + struct platform_device *pdev = phy->pdev; + struct dsi_pll_14nm *pll_14nm; + int ret; + + if (!pdev) + return -ENODEV; + + pll_14nm = devm_kzalloc(&pdev->dev, sizeof(*pll_14nm), GFP_KERNEL); + if (!pll_14nm) + return -ENOMEM; + + DBG("PLL%d", phy->id); + + pll_14nm_list[phy->id] = pll_14nm; + + spin_lock_init(&pll_14nm->postdiv_lock); + + pll_14nm->phy = phy; + + ret = pll_14nm_register(pll_14nm, phy->provided_clocks->hws); + if (ret) { + DRM_DEV_ERROR(&pdev->dev, "failed to register PLL: %d\n", ret); + return ret; + } + + phy->vco_hw = &pll_14nm->clk_hw; + + return 0; +} + static void dsi_14nm_dphy_set_timing(struct msm_dsi_phy *phy, struct msm_dsi_dphy_timing *timing, int lane_idx) @@ -45,7 +939,7 @@ static void dsi_14nm_dphy_set_timing(struct msm_dsi_phy *phy, DSI_14nm_PHY_LN_TIMING_CTRL_11_TRIG3_CMD(0xa0)); } -static int dsi_14nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id, +static int dsi_14nm_phy_enable(struct msm_dsi_phy *phy, struct msm_dsi_phy_clk_request *clk_req) { struct msm_dsi_dphy_timing *timing = &phy->timing; @@ -54,6 +948,7 @@ static int dsi_14nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id, int ret; void __iomem *base = phy->base; void __iomem *lane_base = phy->lane_base; + u32 glbl_test_ctrl; if (msm_dsi_dphy_timing_calc_v2(timing, clk_req)) { DRM_DEV_ERROR(&phy->pdev->dev, @@ -101,11 +996,13 @@ static int dsi_14nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id, udelay(100); dsi_phy_write(base + REG_DSI_14nm_PHY_CMN_CTRL_1, 0x00); - msm_dsi_phy_set_src_pll(phy, src_pll_id, - REG_DSI_14nm_PHY_CMN_GLBL_TEST_CTRL, - DSI_14nm_PHY_CMN_GLBL_TEST_CTRL_BITCLK_HS_SEL); - - ret = msm_dsi_pll_set_usecase(phy->pll, phy->usecase); + glbl_test_ctrl = dsi_phy_read(base + REG_DSI_14nm_PHY_CMN_GLBL_TEST_CTRL); + if (phy->id == DSI_1 && phy->usecase == MSM_DSI_PHY_SLAVE) + glbl_test_ctrl |= DSI_14nm_PHY_CMN_GLBL_TEST_CTRL_BITCLK_HS_SEL; + else + glbl_test_ctrl &= ~DSI_14nm_PHY_CMN_GLBL_TEST_CTRL_BITCLK_HS_SEL; + dsi_phy_write(base + REG_DSI_14nm_PHY_CMN_GLBL_TEST_CTRL, glbl_test_ctrl); + ret = dsi_14nm_set_usecase(phy); if (ret) { DRM_DEV_ERROR(&phy->pdev->dev, "%s: set pll usecase failed, %d\n", __func__, ret); @@ -127,24 +1024,8 @@ static void dsi_14nm_phy_disable(struct msm_dsi_phy *phy) wmb(); } -static int dsi_14nm_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_14nm_cfgs = { - .type = MSM_DSI_PHY_14NM, - .src_pll_truthtable = { {false, false}, {true, false} }, + .has_phy_lane = true, .reg_cfg = { .num = 1, .regs = { @@ -154,8 +1035,54 @@ const struct msm_dsi_phy_cfg dsi_phy_14nm_cfgs = { .ops = { .enable = dsi_14nm_phy_enable, .disable = dsi_14nm_phy_disable, - .init = dsi_14nm_phy_init, + .pll_init = dsi_pll_14nm_init, + .save_pll_state = dsi_14nm_pll_save_state, + .restore_pll_state = dsi_14nm_pll_restore_state, }, + .min_pll_rate = VCO_MIN_RATE, + .max_pll_rate = VCO_MAX_RATE, .io_start = { 0x994400, 0x996400 }, .num_dsi_phy = 2, }; + +const struct msm_dsi_phy_cfg dsi_phy_14nm_660_cfgs = { + .has_phy_lane = true, + .reg_cfg = { + .num = 1, + .regs = { + {"vcca", 73400, 32}, + }, + }, + .ops = { + .enable = dsi_14nm_phy_enable, + .disable = dsi_14nm_phy_disable, + .pll_init = dsi_pll_14nm_init, + .save_pll_state = dsi_14nm_pll_save_state, + .restore_pll_state = dsi_14nm_pll_restore_state, + }, + .min_pll_rate = VCO_MIN_RATE, + .max_pll_rate = VCO_MAX_RATE, + .io_start = { 0xc994400, 0xc996400 }, + .num_dsi_phy = 2, +}; + +const struct msm_dsi_phy_cfg dsi_phy_14nm_8953_cfgs = { + .has_phy_lane = true, + .reg_cfg = { + .num = 1, + .regs = { + {"vcca", 17000, 32}, + }, + }, + .ops = { + .enable = dsi_14nm_phy_enable, + .disable = dsi_14nm_phy_disable, + .pll_init = dsi_pll_14nm_init, + .save_pll_state = dsi_14nm_pll_save_state, + .restore_pll_state = dsi_14nm_pll_restore_state, + }, + .min_pll_rate = VCO_MIN_RATE, + .max_pll_rate = VCO_MAX_RATE, + .io_start = { 0x1a94400, 0x1a96400 }, + .num_dsi_phy = 2, +}; |