diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/clk/gk20a.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/clk/gk20a.c | 680 |
1 files changed, 680 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/gk20a.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/gk20a.c new file mode 100644 index 000000000000..65c532742b08 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/gk20a.c @@ -0,0 +1,680 @@ +/* + * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Shamelessly ripped off from ChromeOS's gk20a/clk_pllg.c + * + */ +#include <subdev/clk.h> +#include <subdev/timer.h> + +#include <core/device.h> + +#ifdef __KERNEL__ +#include <nouveau_platform.h> +#endif + +#define MHZ (1000 * 1000) + +#define MASK(w) ((1 << w) - 1) + +#define SYS_GPCPLL_CFG_BASE 0x00137000 +#define GPC_BCASE_GPCPLL_CFG_BASE 0x00132800 + +#define GPCPLL_CFG (SYS_GPCPLL_CFG_BASE + 0) +#define GPCPLL_CFG_ENABLE BIT(0) +#define GPCPLL_CFG_IDDQ BIT(1) +#define GPCPLL_CFG_LOCK_DET_OFF BIT(4) +#define GPCPLL_CFG_LOCK BIT(17) + +#define GPCPLL_COEFF (SYS_GPCPLL_CFG_BASE + 4) +#define GPCPLL_COEFF_M_SHIFT 0 +#define GPCPLL_COEFF_M_WIDTH 8 +#define GPCPLL_COEFF_N_SHIFT 8 +#define GPCPLL_COEFF_N_WIDTH 8 +#define GPCPLL_COEFF_P_SHIFT 16 +#define GPCPLL_COEFF_P_WIDTH 6 + +#define GPCPLL_CFG2 (SYS_GPCPLL_CFG_BASE + 0xc) +#define GPCPLL_CFG2_SETUP2_SHIFT 16 +#define GPCPLL_CFG2_PLL_STEPA_SHIFT 24 + +#define GPCPLL_CFG3 (SYS_GPCPLL_CFG_BASE + 0x18) +#define GPCPLL_CFG3_PLL_STEPB_SHIFT 16 + +#define GPCPLL_NDIV_SLOWDOWN (SYS_GPCPLL_CFG_BASE + 0x1c) +#define GPCPLL_NDIV_SLOWDOWN_NDIV_LO_SHIFT 0 +#define GPCPLL_NDIV_SLOWDOWN_NDIV_MID_SHIFT 8 +#define GPCPLL_NDIV_SLOWDOWN_STEP_SIZE_LO2MID_SHIFT 16 +#define GPCPLL_NDIV_SLOWDOWN_SLOWDOWN_USING_PLL_SHIFT 22 +#define GPCPLL_NDIV_SLOWDOWN_EN_DYNRAMP_SHIFT 31 + +#define SEL_VCO (SYS_GPCPLL_CFG_BASE + 0x100) +#define SEL_VCO_GPC2CLK_OUT_SHIFT 0 + +#define GPC2CLK_OUT (SYS_GPCPLL_CFG_BASE + 0x250) +#define GPC2CLK_OUT_SDIV14_INDIV4_WIDTH 1 +#define GPC2CLK_OUT_SDIV14_INDIV4_SHIFT 31 +#define GPC2CLK_OUT_SDIV14_INDIV4_MODE 1 +#define GPC2CLK_OUT_VCODIV_WIDTH 6 +#define GPC2CLK_OUT_VCODIV_SHIFT 8 +#define GPC2CLK_OUT_VCODIV1 0 +#define GPC2CLK_OUT_VCODIV_MASK (MASK(GPC2CLK_OUT_VCODIV_WIDTH) << \ + GPC2CLK_OUT_VCODIV_SHIFT) +#define GPC2CLK_OUT_BYPDIV_WIDTH 6 +#define GPC2CLK_OUT_BYPDIV_SHIFT 0 +#define GPC2CLK_OUT_BYPDIV31 0x3c +#define GPC2CLK_OUT_INIT_MASK ((MASK(GPC2CLK_OUT_SDIV14_INDIV4_WIDTH) << \ + GPC2CLK_OUT_SDIV14_INDIV4_SHIFT)\ + | (MASK(GPC2CLK_OUT_VCODIV_WIDTH) << GPC2CLK_OUT_VCODIV_SHIFT)\ + | (MASK(GPC2CLK_OUT_BYPDIV_WIDTH) << GPC2CLK_OUT_BYPDIV_SHIFT)) +#define GPC2CLK_OUT_INIT_VAL ((GPC2CLK_OUT_SDIV14_INDIV4_MODE << \ + GPC2CLK_OUT_SDIV14_INDIV4_SHIFT) \ + | (GPC2CLK_OUT_VCODIV1 << GPC2CLK_OUT_VCODIV_SHIFT) \ + | (GPC2CLK_OUT_BYPDIV31 << GPC2CLK_OUT_BYPDIV_SHIFT)) + +#define GPC_BCAST_NDIV_SLOWDOWN_DEBUG (GPC_BCASE_GPCPLL_CFG_BASE + 0xa0) +#define GPC_BCAST_NDIV_SLOWDOWN_DEBUG_PLL_DYNRAMP_DONE_SYNCED_SHIFT 24 +#define GPC_BCAST_NDIV_SLOWDOWN_DEBUG_PLL_DYNRAMP_DONE_SYNCED_MASK \ + (0x1 << GPC_BCAST_NDIV_SLOWDOWN_DEBUG_PLL_DYNRAMP_DONE_SYNCED_SHIFT) + +static const u8 pl_to_div[] = { +/* PL: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 */ +/* p: */ 1, 2, 3, 4, 5, 6, 8, 10, 12, 16, 12, 16, 20, 24, 32, +}; + +/* All frequencies in Mhz */ +struct gk20a_clk_pllg_params { + u32 min_vco, max_vco; + u32 min_u, max_u; + u32 min_m, max_m; + u32 min_n, max_n; + u32 min_pl, max_pl; +}; + +static const struct gk20a_clk_pllg_params gk20a_pllg_params = { + .min_vco = 1000, .max_vco = 2064, + .min_u = 12, .max_u = 38, + .min_m = 1, .max_m = 255, + .min_n = 8, .max_n = 255, + .min_pl = 1, .max_pl = 32, +}; + +struct gk20a_clk_priv { + struct nvkm_clk base; + const struct gk20a_clk_pllg_params *params; + u32 m, n, pl; + u32 parent_rate; +}; +#define to_gk20a_clk(base) container_of(base, struct gk20a_clk_priv, base) + +static void +gk20a_pllg_read_mnp(struct gk20a_clk_priv *priv) +{ + u32 val; + + val = nv_rd32(priv, GPCPLL_COEFF); + priv->m = (val >> GPCPLL_COEFF_M_SHIFT) & MASK(GPCPLL_COEFF_M_WIDTH); + priv->n = (val >> GPCPLL_COEFF_N_SHIFT) & MASK(GPCPLL_COEFF_N_WIDTH); + priv->pl = (val >> GPCPLL_COEFF_P_SHIFT) & MASK(GPCPLL_COEFF_P_WIDTH); +} + +static u32 +gk20a_pllg_calc_rate(struct gk20a_clk_priv *priv) +{ + u32 rate; + u32 divider; + + rate = priv->parent_rate * priv->n; + divider = priv->m * pl_to_div[priv->pl]; + do_div(rate, divider); + + return rate / 2; +} + +static int +gk20a_pllg_calc_mnp(struct gk20a_clk_priv *priv, unsigned long rate) +{ + u32 target_clk_f, ref_clk_f, target_freq; + u32 min_vco_f, max_vco_f; + u32 low_pl, high_pl, best_pl; + u32 target_vco_f, vco_f; + u32 best_m, best_n; + u32 u_f; + u32 m, n, n2; + u32 delta, lwv, best_delta = ~0; + u32 pl; + + target_clk_f = rate * 2 / MHZ; + ref_clk_f = priv->parent_rate / MHZ; + + max_vco_f = priv->params->max_vco; + min_vco_f = priv->params->min_vco; + best_m = priv->params->max_m; + best_n = priv->params->min_n; + best_pl = priv->params->min_pl; + + target_vco_f = target_clk_f + target_clk_f / 50; + if (max_vco_f < target_vco_f) + max_vco_f = target_vco_f; + + /* min_pl <= high_pl <= max_pl */ + high_pl = (max_vco_f + target_vco_f - 1) / target_vco_f; + high_pl = min(high_pl, priv->params->max_pl); + high_pl = max(high_pl, priv->params->min_pl); + + /* min_pl <= low_pl <= max_pl */ + low_pl = min_vco_f / target_vco_f; + low_pl = min(low_pl, priv->params->max_pl); + low_pl = max(low_pl, priv->params->min_pl); + + /* Find Indices of high_pl and low_pl */ + for (pl = 0; pl < ARRAY_SIZE(pl_to_div) - 1; pl++) { + if (pl_to_div[pl] >= low_pl) { + low_pl = pl; + break; + } + } + for (pl = 0; pl < ARRAY_SIZE(pl_to_div) - 1; pl++) { + if (pl_to_div[pl] >= high_pl) { + high_pl = pl; + break; + } + } + + nv_debug(priv, "low_PL %d(div%d), high_PL %d(div%d)", low_pl, + pl_to_div[low_pl], high_pl, pl_to_div[high_pl]); + + /* Select lowest possible VCO */ + for (pl = low_pl; pl <= high_pl; pl++) { + target_vco_f = target_clk_f * pl_to_div[pl]; + for (m = priv->params->min_m; m <= priv->params->max_m; m++) { + u_f = ref_clk_f / m; + + if (u_f < priv->params->min_u) + break; + if (u_f > priv->params->max_u) + continue; + + n = (target_vco_f * m) / ref_clk_f; + n2 = ((target_vco_f * m) + (ref_clk_f - 1)) / ref_clk_f; + + if (n > priv->params->max_n) + break; + + for (; n <= n2; n++) { + if (n < priv->params->min_n) + continue; + if (n > priv->params->max_n) + break; + + vco_f = ref_clk_f * n / m; + + if (vco_f >= min_vco_f && vco_f <= max_vco_f) { + lwv = (vco_f + (pl_to_div[pl] / 2)) + / pl_to_div[pl]; + delta = abs(lwv - target_clk_f); + + if (delta < best_delta) { + best_delta = delta; + best_m = m; + best_n = n; + best_pl = pl; + + if (best_delta == 0) + goto found_match; + } + } + } + } + } + +found_match: + WARN_ON(best_delta == ~0); + + if (best_delta != 0) + nv_debug(priv, "no best match for target @ %dMHz on gpc_pll", + target_clk_f); + + priv->m = best_m; + priv->n = best_n; + priv->pl = best_pl; + + target_freq = gk20a_pllg_calc_rate(priv) / MHZ; + + nv_debug(priv, "actual target freq %d MHz, M %d, N %d, PL %d(div%d)\n", + target_freq, priv->m, priv->n, priv->pl, pl_to_div[priv->pl]); + return 0; +} + +static int +gk20a_pllg_slide(struct gk20a_clk_priv *priv, u32 n) +{ + u32 val; + int ramp_timeout; + + /* get old coefficients */ + val = nv_rd32(priv, GPCPLL_COEFF); + /* do nothing if NDIV is the same */ + if (n == ((val >> GPCPLL_COEFF_N_SHIFT) & MASK(GPCPLL_COEFF_N_WIDTH))) + return 0; + + /* setup */ + nv_mask(priv, GPCPLL_CFG2, 0xff << GPCPLL_CFG2_PLL_STEPA_SHIFT, + 0x2b << GPCPLL_CFG2_PLL_STEPA_SHIFT); + nv_mask(priv, GPCPLL_CFG3, 0xff << GPCPLL_CFG3_PLL_STEPB_SHIFT, + 0xb << GPCPLL_CFG3_PLL_STEPB_SHIFT); + + /* pll slowdown mode */ + nv_mask(priv, GPCPLL_NDIV_SLOWDOWN, + BIT(GPCPLL_NDIV_SLOWDOWN_SLOWDOWN_USING_PLL_SHIFT), + BIT(GPCPLL_NDIV_SLOWDOWN_SLOWDOWN_USING_PLL_SHIFT)); + + /* new ndiv ready for ramp */ + val = nv_rd32(priv, GPCPLL_COEFF); + val &= ~(MASK(GPCPLL_COEFF_N_WIDTH) << GPCPLL_COEFF_N_SHIFT); + val |= (n & MASK(GPCPLL_COEFF_N_WIDTH)) << GPCPLL_COEFF_N_SHIFT; + udelay(1); + nv_wr32(priv, GPCPLL_COEFF, val); + + /* dynamic ramp to new ndiv */ + val = nv_rd32(priv, GPCPLL_NDIV_SLOWDOWN); + val |= 0x1 << GPCPLL_NDIV_SLOWDOWN_EN_DYNRAMP_SHIFT; + udelay(1); + nv_wr32(priv, GPCPLL_NDIV_SLOWDOWN, val); + + for (ramp_timeout = 500; ramp_timeout > 0; ramp_timeout--) { + udelay(1); + val = nv_rd32(priv, GPC_BCAST_NDIV_SLOWDOWN_DEBUG); + if (val & GPC_BCAST_NDIV_SLOWDOWN_DEBUG_PLL_DYNRAMP_DONE_SYNCED_MASK) + break; + } + + /* exit slowdown mode */ + nv_mask(priv, GPCPLL_NDIV_SLOWDOWN, + BIT(GPCPLL_NDIV_SLOWDOWN_SLOWDOWN_USING_PLL_SHIFT) | + BIT(GPCPLL_NDIV_SLOWDOWN_EN_DYNRAMP_SHIFT), 0); + nv_rd32(priv, GPCPLL_NDIV_SLOWDOWN); + + if (ramp_timeout <= 0) { + nv_error(priv, "gpcpll dynamic ramp timeout\n"); + return -ETIMEDOUT; + } + + return 0; +} + +static void +_gk20a_pllg_enable(struct gk20a_clk_priv *priv) +{ + nv_mask(priv, GPCPLL_CFG, GPCPLL_CFG_ENABLE, GPCPLL_CFG_ENABLE); + nv_rd32(priv, GPCPLL_CFG); +} + +static void +_gk20a_pllg_disable(struct gk20a_clk_priv *priv) +{ + nv_mask(priv, GPCPLL_CFG, GPCPLL_CFG_ENABLE, 0); + nv_rd32(priv, GPCPLL_CFG); +} + +static int +_gk20a_pllg_program_mnp(struct gk20a_clk_priv *priv, bool allow_slide) +{ + u32 val, cfg; + u32 m_old, pl_old, n_lo; + + /* get old coefficients */ + val = nv_rd32(priv, GPCPLL_COEFF); + m_old = (val >> GPCPLL_COEFF_M_SHIFT) & MASK(GPCPLL_COEFF_M_WIDTH); + pl_old = (val >> GPCPLL_COEFF_P_SHIFT) & MASK(GPCPLL_COEFF_P_WIDTH); + + /* do NDIV slide if there is no change in M and PL */ + cfg = nv_rd32(priv, GPCPLL_CFG); + if (allow_slide && priv->m == m_old && priv->pl == pl_old && + (cfg & GPCPLL_CFG_ENABLE)) { + return gk20a_pllg_slide(priv, priv->n); + } + + /* slide down to NDIV_LO */ + n_lo = DIV_ROUND_UP(m_old * priv->params->min_vco, + priv->parent_rate / MHZ); + if (allow_slide && (cfg & GPCPLL_CFG_ENABLE)) { + int ret = gk20a_pllg_slide(priv, n_lo); + + if (ret) + return ret; + } + + /* split FO-to-bypass jump in halfs by setting out divider 1:2 */ + nv_mask(priv, GPC2CLK_OUT, GPC2CLK_OUT_VCODIV_MASK, + 0x2 << GPC2CLK_OUT_VCODIV_SHIFT); + + /* put PLL in bypass before programming it */ + val = nv_rd32(priv, SEL_VCO); + val &= ~(BIT(SEL_VCO_GPC2CLK_OUT_SHIFT)); + udelay(2); + nv_wr32(priv, SEL_VCO, val); + + /* get out from IDDQ */ + val = nv_rd32(priv, GPCPLL_CFG); + if (val & GPCPLL_CFG_IDDQ) { + val &= ~GPCPLL_CFG_IDDQ; + nv_wr32(priv, GPCPLL_CFG, val); + nv_rd32(priv, GPCPLL_CFG); + udelay(2); + } + + _gk20a_pllg_disable(priv); + + nv_debug(priv, "%s: m=%d n=%d pl=%d\n", __func__, priv->m, priv->n, + priv->pl); + + n_lo = DIV_ROUND_UP(priv->m * priv->params->min_vco, + priv->parent_rate / MHZ); + val = priv->m << GPCPLL_COEFF_M_SHIFT; + val |= (allow_slide ? n_lo : priv->n) << GPCPLL_COEFF_N_SHIFT; + val |= priv->pl << GPCPLL_COEFF_P_SHIFT; + nv_wr32(priv, GPCPLL_COEFF, val); + + _gk20a_pllg_enable(priv); + + val = nv_rd32(priv, GPCPLL_CFG); + if (val & GPCPLL_CFG_LOCK_DET_OFF) { + val &= ~GPCPLL_CFG_LOCK_DET_OFF; + nv_wr32(priv, GPCPLL_CFG, val); + } + + if (!nvkm_timer_wait_eq(priv, 300000, GPCPLL_CFG, GPCPLL_CFG_LOCK, + GPCPLL_CFG_LOCK)) { + nv_error(priv, "%s: timeout waiting for pllg lock\n", __func__); + return -ETIMEDOUT; + } + + /* switch to VCO mode */ + nv_mask(priv, SEL_VCO, 0, BIT(SEL_VCO_GPC2CLK_OUT_SHIFT)); + + /* restore out divider 1:1 */ + val = nv_rd32(priv, GPC2CLK_OUT); + val &= ~GPC2CLK_OUT_VCODIV_MASK; + udelay(2); + nv_wr32(priv, GPC2CLK_OUT, val); + + /* slide up to new NDIV */ + return allow_slide ? gk20a_pllg_slide(priv, priv->n) : 0; +} + +static int +gk20a_pllg_program_mnp(struct gk20a_clk_priv *priv) +{ + int err; + + err = _gk20a_pllg_program_mnp(priv, true); + if (err) + err = _gk20a_pllg_program_mnp(priv, false); + + return err; +} + +static void +gk20a_pllg_disable(struct gk20a_clk_priv *priv) +{ + u32 val; + + /* slide to VCO min */ + val = nv_rd32(priv, GPCPLL_CFG); + if (val & GPCPLL_CFG_ENABLE) { + u32 coeff, m, n_lo; + + coeff = nv_rd32(priv, GPCPLL_COEFF); + m = (coeff >> GPCPLL_COEFF_M_SHIFT) & MASK(GPCPLL_COEFF_M_WIDTH); + n_lo = DIV_ROUND_UP(m * priv->params->min_vco, + priv->parent_rate / MHZ); + gk20a_pllg_slide(priv, n_lo); + } + + /* put PLL in bypass before disabling it */ + nv_mask(priv, SEL_VCO, BIT(SEL_VCO_GPC2CLK_OUT_SHIFT), 0); + + _gk20a_pllg_disable(priv); +} + +#define GK20A_CLK_GPC_MDIV 1000 + +static struct nvkm_domain +gk20a_domains[] = { + { nv_clk_src_crystal, 0xff }, + { nv_clk_src_gpc, 0xff, 0, "core", GK20A_CLK_GPC_MDIV }, + { nv_clk_src_max } +}; + +static struct nvkm_pstate +gk20a_pstates[] = { + { + .base = { + .domain[nv_clk_src_gpc] = 72000, + .voltage = 0, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 108000, + .voltage = 1, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 180000, + .voltage = 2, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 252000, + .voltage = 3, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 324000, + .voltage = 4, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 396000, + .voltage = 5, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 468000, + .voltage = 6, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 540000, + .voltage = 7, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 612000, + .voltage = 8, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 648000, + .voltage = 9, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 684000, + .voltage = 10, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 708000, + .voltage = 11, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 756000, + .voltage = 12, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 804000, + .voltage = 13, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 852000, + .voltage = 14, + }, + }, +}; + +static int +gk20a_clk_read(struct nvkm_clk *clk, enum nv_clk_src src) +{ + struct gk20a_clk_priv *priv = (void *)clk; + + switch (src) { + case nv_clk_src_crystal: + return nv_device(clk)->crystal; + case nv_clk_src_gpc: + gk20a_pllg_read_mnp(priv); + return gk20a_pllg_calc_rate(priv) / GK20A_CLK_GPC_MDIV; + default: + nv_error(clk, "invalid clock source %d\n", src); + return -EINVAL; + } +} + +static int +gk20a_clk_calc(struct nvkm_clk *clk, struct nvkm_cstate *cstate) +{ + struct gk20a_clk_priv *priv = (void *)clk; + + return gk20a_pllg_calc_mnp(priv, cstate->domain[nv_clk_src_gpc] * + GK20A_CLK_GPC_MDIV); +} + +static int +gk20a_clk_prog(struct nvkm_clk *clk) +{ + struct gk20a_clk_priv *priv = (void *)clk; + + return gk20a_pllg_program_mnp(priv); +} + +static void +gk20a_clk_tidy(struct nvkm_clk *clk) +{ +} + +static int +gk20a_clk_fini(struct nvkm_object *object, bool suspend) +{ + struct gk20a_clk_priv *priv = (void *)object; + int ret; + + ret = nvkm_clk_fini(&priv->base, false); + + gk20a_pllg_disable(priv); + + return ret; +} + +static int +gk20a_clk_init(struct nvkm_object *object) +{ + struct gk20a_clk_priv *priv = (void *)object; + int ret; + + nv_mask(priv, GPC2CLK_OUT, GPC2CLK_OUT_INIT_MASK, GPC2CLK_OUT_INIT_VAL); + + ret = nvkm_clk_init(&priv->base); + if (ret) + return ret; + + ret = gk20a_clk_prog(&priv->base); + if (ret) { + nv_error(priv, "cannot initialize clock\n"); + return ret; + } + + return 0; +} + +static int +gk20a_clk_ctor(struct nvkm_object *parent, struct nvkm_object *engine, + struct nvkm_oclass *oclass, void *data, u32 size, + struct nvkm_object **pobject) +{ + struct gk20a_clk_priv *priv; + struct nouveau_platform_device *plat; + int ret; + int i; + + /* Finish initializing the pstates */ + for (i = 0; i < ARRAY_SIZE(gk20a_pstates); i++) { + INIT_LIST_HEAD(&gk20a_pstates[i].list); + gk20a_pstates[i].pstate = i + 1; + } + + ret = nvkm_clk_create(parent, engine, oclass, gk20a_domains, + gk20a_pstates, ARRAY_SIZE(gk20a_pstates), + true, &priv); + *pobject = nv_object(priv); + if (ret) + return ret; + + priv->params = &gk20a_pllg_params; + + plat = nv_device_to_platform(nv_device(parent)); + priv->parent_rate = clk_get_rate(plat->gpu->clk); + nv_info(priv, "parent clock rate: %d Mhz\n", priv->parent_rate / MHZ); + + priv->base.read = gk20a_clk_read; + priv->base.calc = gk20a_clk_calc; + priv->base.prog = gk20a_clk_prog; + priv->base.tidy = gk20a_clk_tidy; + return 0; +} + +struct nvkm_oclass +gk20a_clk_oclass = { + .handle = NV_SUBDEV(CLK, 0xea), + .ofuncs = &(struct nvkm_ofuncs) { + .ctor = gk20a_clk_ctor, + .dtor = _nvkm_subdev_dtor, + .init = gk20a_clk_init, + .fini = gk20a_clk_fini, + }, +}; |