diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/core/subdev/clock/nva3.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/clock/nva3.c | 271 |
1 files changed, 259 insertions, 12 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/clock/nva3.c b/drivers/gpu/drm/nouveau/core/subdev/clock/nva3.c index f074cd20bc9c..4f5a1373f002 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/clock/nva3.c +++ b/drivers/gpu/drm/nouveau/core/subdev/clock/nva3.c @@ -22,33 +22,277 @@ * Authors: Ben Skeggs */ -#include <subdev/clock.h> #include <subdev/bios.h> #include <subdev/bios/pll.h> +#include <subdev/timer.h> #include "pll.h" +#include "nva3.h" + struct nva3_clock_priv { struct nouveau_clock base; + struct nva3_clock_info eng[nv_clk_src_max]; }; +static u32 read_clk(struct nva3_clock_priv *, int, bool); +static u32 read_pll(struct nva3_clock_priv *, int, u32); + +static u32 +read_vco(struct nva3_clock_priv *priv, int clk) +{ + u32 sctl = nv_rd32(priv, 0x4120 + (clk * 4)); + if ((sctl & 0x00000030) != 0x00000030) + return read_pll(priv, 0x41, 0x00e820); + return read_pll(priv, 0x42, 0x00e8a0); +} + +static u32 +read_clk(struct nva3_clock_priv *priv, int clk, bool ignore_en) +{ + u32 sctl, sdiv, sclk; + + /* refclk for the 0xe8xx plls is a fixed frequency */ + if (clk >= 0x40) { + if (nv_device(priv)->chipset == 0xaf) { + /* no joke.. seriously.. sigh.. */ + return nv_rd32(priv, 0x00471c) * 1000; + } + + return nv_device(priv)->crystal; + } + + sctl = nv_rd32(priv, 0x4120 + (clk * 4)); + if (!ignore_en && !(sctl & 0x00000100)) + return 0; + + switch (sctl & 0x00003000) { + case 0x00000000: + return nv_device(priv)->crystal; + case 0x00002000: + if (sctl & 0x00000040) + return 108000; + return 100000; + case 0x00003000: + sclk = read_vco(priv, clk); + sdiv = ((sctl & 0x003f0000) >> 16) + 2; + return (sclk * 2) / sdiv; + default: + return 0; + } +} + +static u32 +read_pll(struct nva3_clock_priv *priv, int clk, u32 pll) +{ + u32 ctrl = nv_rd32(priv, pll + 0); + u32 sclk = 0, P = 1, N = 1, M = 1; + + if (!(ctrl & 0x00000008)) { + if (ctrl & 0x00000001) { + u32 coef = nv_rd32(priv, pll + 4); + M = (coef & 0x000000ff) >> 0; + N = (coef & 0x0000ff00) >> 8; + P = (coef & 0x003f0000) >> 16; + + /* no post-divider on these.. */ + if ((pll & 0x00ff00) == 0x00e800) + P = 1; + + sclk = read_clk(priv, 0x00 + clk, false); + } + } else { + sclk = read_clk(priv, 0x10 + clk, false); + } + + if (M * P) + return sclk * N / (M * P); + return 0; +} + +static int +nva3_clock_read(struct nouveau_clock *clk, enum nv_clk_src src) +{ + struct nva3_clock_priv *priv = (void *)clk; + + switch (src) { + case nv_clk_src_crystal: + return nv_device(priv)->crystal; + case nv_clk_src_href: + return 100000; + case nv_clk_src_core: + return read_pll(priv, 0x00, 0x4200); + case nv_clk_src_shader: + return read_pll(priv, 0x01, 0x4220); + case nv_clk_src_mem: + return read_pll(priv, 0x02, 0x4000); + case nv_clk_src_disp: + return read_clk(priv, 0x20, false); + case nv_clk_src_vdec: + return read_clk(priv, 0x21, false); + case nv_clk_src_daemon: + return read_clk(priv, 0x25, false); + default: + nv_error(clk, "invalid clock source %d\n", src); + return -EINVAL; + } +} + int -nva3_clock_pll_calc(struct nouveau_clock *clock, struct nvbios_pll *info, - int clk, struct nouveau_pll_vals *pv) +nva3_clock_info(struct nouveau_clock *clock, int clk, u32 pll, u32 khz, + struct nva3_clock_info *info) { - int ret, N, M, P; + struct nouveau_bios *bios = nouveau_bios(clock); + struct nva3_clock_priv *priv = (void *)clock; + struct nvbios_pll limits; + u32 oclk, sclk, sdiv; + int P, N, M, diff; + int ret; + + info->pll = 0; + info->clk = 0; + + switch (khz) { + case 27000: + info->clk = 0x00000100; + return khz; + case 100000: + info->clk = 0x00002100; + return khz; + case 108000: + info->clk = 0x00002140; + return khz; + default: + sclk = read_vco(priv, clk); + sdiv = min((sclk * 2) / (khz - 2999), (u32)65); + /* if the clock has a PLL attached, and we can get a within + * [-2, 3) MHz of a divider, we'll disable the PLL and use + * the divider instead. + * + * divider can go as low as 2, limited here because NVIDIA + * and the VBIOS on my NVA8 seem to prefer using the PLL + * for 810MHz - is there a good reason? + */ + if (sdiv > 4) { + oclk = (sclk * 2) / sdiv; + diff = khz - oclk; + if (!pll || (diff >= -2000 && diff < 3000)) { + info->clk = (((sdiv - 2) << 16) | 0x00003100); + return oclk; + } + } + + if (!pll) + return -ERANGE; + break; + } - ret = nva3_pll_calc(nv_subdev(clock), info, clk, &N, NULL, &M, &P); + ret = nvbios_pll_parse(bios, pll, &limits); + if (ret) + return ret; + + limits.refclk = read_clk(priv, clk - 0x10, true); + if (!limits.refclk) + return -EINVAL; - if (ret > 0) { - pv->refclk = info->refclk; - pv->N1 = N; - pv->M1 = M; - pv->log2P = P; + ret = nva3_pll_calc(nv_subdev(priv), &limits, khz, &N, NULL, &M, &P); + if (ret >= 0) { + info->clk = nv_rd32(priv, 0x4120 + (clk * 4)); + info->pll = (P << 16) | (N << 8) | M; } + + return ret ? ret : -ERANGE; +} + +static int +calc_clk(struct nva3_clock_priv *priv, struct nouveau_cstate *cstate, + int clk, u32 pll, int idx) +{ + int ret = nva3_clock_info(&priv->base, clk, pll, cstate->domain[idx], + &priv->eng[idx]); + if (ret >= 0) + return 0; return ret; } +static void +prog_pll(struct nva3_clock_priv *priv, int clk, u32 pll, int idx) +{ + struct nva3_clock_info *info = &priv->eng[idx]; + const u32 src0 = 0x004120 + (clk * 4); + const u32 src1 = 0x004160 + (clk * 4); + const u32 ctrl = pll + 0; + const u32 coef = pll + 4; + + if (info->pll) { + nv_mask(priv, src0, 0x00000101, 0x00000101); + nv_wr32(priv, coef, info->pll); + nv_mask(priv, ctrl, 0x00000015, 0x00000015); + nv_mask(priv, ctrl, 0x00000010, 0x00000000); + nv_wait(priv, ctrl, 0x00020000, 0x00020000); + nv_mask(priv, ctrl, 0x00000010, 0x00000010); + nv_mask(priv, ctrl, 0x00000008, 0x00000000); + nv_mask(priv, src1, 0x00000100, 0x00000000); + nv_mask(priv, src1, 0x00000001, 0x00000000); + } else { + nv_mask(priv, src1, 0x003f3141, 0x00000101 | info->clk); + nv_mask(priv, ctrl, 0x00000018, 0x00000018); + udelay(20); + nv_mask(priv, ctrl, 0x00000001, 0x00000000); + nv_mask(priv, src0, 0x00000100, 0x00000000); + nv_mask(priv, src0, 0x00000001, 0x00000000); + } +} + +static void +prog_clk(struct nva3_clock_priv *priv, int clk, int idx) +{ + struct nva3_clock_info *info = &priv->eng[idx]; + nv_mask(priv, 0x004120 + (clk * 4), 0x003f3141, 0x00000101 | info->clk); +} + +static int +nva3_clock_calc(struct nouveau_clock *clk, struct nouveau_cstate *cstate) +{ + struct nva3_clock_priv *priv = (void *)clk; + int ret; + + if ((ret = calc_clk(priv, cstate, 0x10, 0x4200, nv_clk_src_core)) || + (ret = calc_clk(priv, cstate, 0x11, 0x4220, nv_clk_src_shader)) || + (ret = calc_clk(priv, cstate, 0x20, 0x0000, nv_clk_src_disp)) || + (ret = calc_clk(priv, cstate, 0x21, 0x0000, nv_clk_src_vdec))) + return ret; + + return 0; +} + +static int +nva3_clock_prog(struct nouveau_clock *clk) +{ + struct nva3_clock_priv *priv = (void *)clk; + prog_pll(priv, 0x00, 0x004200, nv_clk_src_core); + prog_pll(priv, 0x01, 0x004220, nv_clk_src_shader); + prog_clk(priv, 0x20, nv_clk_src_disp); + prog_clk(priv, 0x21, nv_clk_src_vdec); + return 0; +} + +static void +nva3_clock_tidy(struct nouveau_clock *clk) +{ +} + +static struct nouveau_clocks +nva3_domain[] = { + { nv_clk_src_crystal, 0xff }, + { nv_clk_src_href , 0xff }, + { nv_clk_src_core , 0x00, 0, "core", 1000 }, + { nv_clk_src_shader , 0x01, 0, "shader", 1000 }, + { nv_clk_src_mem , 0x02, 0, "memory", 1000 }, + { nv_clk_src_vdec , 0x03 }, + { nv_clk_src_disp , 0x04 }, + { nv_clk_src_max } +}; static int nva3_clock_ctor(struct nouveau_object *parent, struct nouveau_object *engine, @@ -58,12 +302,15 @@ nva3_clock_ctor(struct nouveau_object *parent, struct nouveau_object *engine, struct nva3_clock_priv *priv; int ret; - ret = nouveau_clock_create(parent, engine, oclass, &priv); + ret = nouveau_clock_create(parent, engine, oclass, nva3_domain, &priv); *pobject = nv_object(priv); if (ret) return ret; - priv->base.pll_calc = nva3_clock_pll_calc; + priv->base.read = nva3_clock_read; + priv->base.calc = nva3_clock_calc; + priv->base.prog = nva3_clock_prog; + priv->base.tidy = nva3_clock_tidy; return 0; } |