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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c | 422 |
1 files changed, 422 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c new file mode 100644 index 000000000..81f103f88 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/mcp77.c @@ -0,0 +1,422 @@ +/* + * Copyright 2012 Red Hat Inc. + * + * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. + * + * Authors: Ben Skeggs + */ +#define mcp77_clk(p) container_of((p), struct mcp77_clk, base) +#include "gt215.h" +#include "pll.h" + +#include <subdev/bios.h> +#include <subdev/bios/pll.h> +#include <subdev/timer.h> + +struct mcp77_clk { + struct nvkm_clk base; + enum nv_clk_src csrc, ssrc, vsrc; + u32 cctrl, sctrl; + u32 ccoef, scoef; + u32 cpost, spost; + u32 vdiv; +}; + +static u32 +read_div(struct mcp77_clk *clk) +{ + struct nvkm_device *device = clk->base.subdev.device; + return nvkm_rd32(device, 0x004600); +} + +static u32 +read_pll(struct mcp77_clk *clk, u32 base) +{ + struct nvkm_device *device = clk->base.subdev.device; + u32 ctrl = nvkm_rd32(device, base + 0); + u32 coef = nvkm_rd32(device, base + 4); + u32 ref = nvkm_clk_read(&clk->base, nv_clk_src_href); + u32 post_div = 0; + u32 clock = 0; + int N1, M1; + + switch (base){ + case 0x4020: + post_div = 1 << ((nvkm_rd32(device, 0x4070) & 0x000f0000) >> 16); + break; + case 0x4028: + post_div = (nvkm_rd32(device, 0x4040) & 0x000f0000) >> 16; + break; + default: + break; + } + + N1 = (coef & 0x0000ff00) >> 8; + M1 = (coef & 0x000000ff); + if ((ctrl & 0x80000000) && M1) { + clock = ref * N1 / M1; + clock = clock / post_div; + } + + return clock; +} + +static int +mcp77_clk_read(struct nvkm_clk *base, enum nv_clk_src src) +{ + struct mcp77_clk *clk = mcp77_clk(base); + struct nvkm_subdev *subdev = &clk->base.subdev; + struct nvkm_device *device = subdev->device; + u32 mast = nvkm_rd32(device, 0x00c054); + u32 P = 0; + + switch (src) { + case nv_clk_src_crystal: + return device->crystal; + case nv_clk_src_href: + return 100000; /* PCIE reference clock */ + case nv_clk_src_hclkm4: + return nvkm_clk_read(&clk->base, nv_clk_src_href) * 4; + case nv_clk_src_hclkm2d3: + return nvkm_clk_read(&clk->base, nv_clk_src_href) * 2 / 3; + case nv_clk_src_host: + switch (mast & 0x000c0000) { + case 0x00000000: return nvkm_clk_read(&clk->base, nv_clk_src_hclkm2d3); + case 0x00040000: break; + case 0x00080000: return nvkm_clk_read(&clk->base, nv_clk_src_hclkm4); + case 0x000c0000: return nvkm_clk_read(&clk->base, nv_clk_src_cclk); + } + break; + case nv_clk_src_core: + P = (nvkm_rd32(device, 0x004028) & 0x00070000) >> 16; + + switch (mast & 0x00000003) { + case 0x00000000: return nvkm_clk_read(&clk->base, nv_clk_src_crystal) >> P; + case 0x00000001: return 0; + case 0x00000002: return nvkm_clk_read(&clk->base, nv_clk_src_hclkm4) >> P; + case 0x00000003: return read_pll(clk, 0x004028) >> P; + } + break; + case nv_clk_src_cclk: + if ((mast & 0x03000000) != 0x03000000) + return nvkm_clk_read(&clk->base, nv_clk_src_core); + + if ((mast & 0x00000200) == 0x00000000) + return nvkm_clk_read(&clk->base, nv_clk_src_core); + + switch (mast & 0x00000c00) { + case 0x00000000: return nvkm_clk_read(&clk->base, nv_clk_src_href); + case 0x00000400: return nvkm_clk_read(&clk->base, nv_clk_src_hclkm4); + case 0x00000800: return nvkm_clk_read(&clk->base, nv_clk_src_hclkm2d3); + default: return 0; + } + case nv_clk_src_shader: + P = (nvkm_rd32(device, 0x004020) & 0x00070000) >> 16; + switch (mast & 0x00000030) { + case 0x00000000: + if (mast & 0x00000040) + return nvkm_clk_read(&clk->base, nv_clk_src_href) >> P; + return nvkm_clk_read(&clk->base, nv_clk_src_crystal) >> P; + case 0x00000010: break; + case 0x00000020: return read_pll(clk, 0x004028) >> P; + case 0x00000030: return read_pll(clk, 0x004020) >> P; + } + break; + case nv_clk_src_mem: + return 0; + case nv_clk_src_vdec: + P = (read_div(clk) & 0x00000700) >> 8; + + switch (mast & 0x00400000) { + case 0x00400000: + return nvkm_clk_read(&clk->base, nv_clk_src_core) >> P; + default: + return 500000 >> P; + } + break; + default: + break; + } + + nvkm_debug(subdev, "unknown clock source %d %08x\n", src, mast); + return 0; +} + +static u32 +calc_pll(struct mcp77_clk *clk, u32 reg, + u32 clock, int *N, int *M, int *P) +{ + struct nvkm_subdev *subdev = &clk->base.subdev; + struct nvbios_pll pll; + int ret; + + ret = nvbios_pll_parse(subdev->device->bios, reg, &pll); + if (ret) + return 0; + + pll.vco2.max_freq = 0; + pll.refclk = nvkm_clk_read(&clk->base, nv_clk_src_href); + if (!pll.refclk) + return 0; + + return nv04_pll_calc(subdev, &pll, clock, N, M, NULL, NULL, P); +} + +static inline u32 +calc_P(u32 src, u32 target, int *div) +{ + u32 clk0 = src, clk1 = src; + for (*div = 0; *div <= 7; (*div)++) { + if (clk0 <= target) { + clk1 = clk0 << (*div ? 1 : 0); + break; + } + clk0 >>= 1; + } + + if (target - clk0 <= clk1 - target) + return clk0; + (*div)--; + return clk1; +} + +static int +mcp77_clk_calc(struct nvkm_clk *base, struct nvkm_cstate *cstate) +{ + struct mcp77_clk *clk = mcp77_clk(base); + const int shader = cstate->domain[nv_clk_src_shader]; + const int core = cstate->domain[nv_clk_src_core]; + const int vdec = cstate->domain[nv_clk_src_vdec]; + struct nvkm_subdev *subdev = &clk->base.subdev; + u32 out = 0, clock = 0; + int N, M, P1, P2 = 0; + int divs = 0; + + /* cclk: find suitable source, disable PLL if we can */ + if (core < nvkm_clk_read(&clk->base, nv_clk_src_hclkm4)) + out = calc_P(nvkm_clk_read(&clk->base, nv_clk_src_hclkm4), core, &divs); + + /* Calculate clock * 2, so shader clock can use it too */ + clock = calc_pll(clk, 0x4028, (core << 1), &N, &M, &P1); + + if (abs(core - out) <= abs(core - (clock >> 1))) { + clk->csrc = nv_clk_src_hclkm4; + clk->cctrl = divs << 16; + } else { + /* NVCTRL is actually used _after_ NVPOST, and after what we + * call NVPLL. To make matters worse, NVPOST is an integer + * divider instead of a right-shift number. */ + if(P1 > 2) { + P2 = P1 - 2; + P1 = 2; + } + + clk->csrc = nv_clk_src_core; + clk->ccoef = (N << 8) | M; + + clk->cctrl = (P2 + 1) << 16; + clk->cpost = (1 << P1) << 16; + } + + /* sclk: nvpll + divisor, href or spll */ + out = 0; + if (shader == nvkm_clk_read(&clk->base, nv_clk_src_href)) { + clk->ssrc = nv_clk_src_href; + } else { + clock = calc_pll(clk, 0x4020, shader, &N, &M, &P1); + if (clk->csrc == nv_clk_src_core) + out = calc_P((core << 1), shader, &divs); + + if (abs(shader - out) <= + abs(shader - clock) && + (divs + P2) <= 7) { + clk->ssrc = nv_clk_src_core; + clk->sctrl = (divs + P2) << 16; + } else { + clk->ssrc = nv_clk_src_shader; + clk->scoef = (N << 8) | M; + clk->sctrl = P1 << 16; + } + } + + /* vclk */ + out = calc_P(core, vdec, &divs); + clock = calc_P(500000, vdec, &P1); + if(abs(vdec - out) <= abs(vdec - clock)) { + clk->vsrc = nv_clk_src_cclk; + clk->vdiv = divs << 16; + } else { + clk->vsrc = nv_clk_src_vdec; + clk->vdiv = P1 << 16; + } + + /* Print strategy! */ + nvkm_debug(subdev, "nvpll: %08x %08x %08x\n", + clk->ccoef, clk->cpost, clk->cctrl); + nvkm_debug(subdev, " spll: %08x %08x %08x\n", + clk->scoef, clk->spost, clk->sctrl); + nvkm_debug(subdev, " vdiv: %08x\n", clk->vdiv); + if (clk->csrc == nv_clk_src_hclkm4) + nvkm_debug(subdev, "core: hrefm4\n"); + else + nvkm_debug(subdev, "core: nvpll\n"); + + if (clk->ssrc == nv_clk_src_hclkm4) + nvkm_debug(subdev, "shader: hrefm4\n"); + else if (clk->ssrc == nv_clk_src_core) + nvkm_debug(subdev, "shader: nvpll\n"); + else + nvkm_debug(subdev, "shader: spll\n"); + + if (clk->vsrc == nv_clk_src_hclkm4) + nvkm_debug(subdev, "vdec: 500MHz\n"); + else + nvkm_debug(subdev, "vdec: core\n"); + + return 0; +} + +static int +mcp77_clk_prog(struct nvkm_clk *base) +{ + struct mcp77_clk *clk = mcp77_clk(base); + struct nvkm_subdev *subdev = &clk->base.subdev; + struct nvkm_device *device = subdev->device; + u32 pllmask = 0, mast; + unsigned long flags; + unsigned long *f = &flags; + int ret = 0; + + ret = gt215_clk_pre(&clk->base, f); + if (ret) + goto out; + + /* First switch to safe clocks: href */ + mast = nvkm_mask(device, 0xc054, 0x03400e70, 0x03400640); + mast &= ~0x00400e73; + mast |= 0x03000000; + + switch (clk->csrc) { + case nv_clk_src_hclkm4: + nvkm_mask(device, 0x4028, 0x00070000, clk->cctrl); + mast |= 0x00000002; + break; + case nv_clk_src_core: + nvkm_wr32(device, 0x402c, clk->ccoef); + nvkm_wr32(device, 0x4028, 0x80000000 | clk->cctrl); + nvkm_wr32(device, 0x4040, clk->cpost); + pllmask |= (0x3 << 8); + mast |= 0x00000003; + break; + default: + nvkm_warn(subdev, "Reclocking failed: unknown core clock\n"); + goto resume; + } + + switch (clk->ssrc) { + case nv_clk_src_href: + nvkm_mask(device, 0x4020, 0x00070000, 0x00000000); + /* mast |= 0x00000000; */ + break; + case nv_clk_src_core: + nvkm_mask(device, 0x4020, 0x00070000, clk->sctrl); + mast |= 0x00000020; + break; + case nv_clk_src_shader: + nvkm_wr32(device, 0x4024, clk->scoef); + nvkm_wr32(device, 0x4020, 0x80000000 | clk->sctrl); + nvkm_wr32(device, 0x4070, clk->spost); + pllmask |= (0x3 << 12); + mast |= 0x00000030; + break; + default: + nvkm_warn(subdev, "Reclocking failed: unknown sclk clock\n"); + goto resume; + } + + if (nvkm_msec(device, 2000, + u32 tmp = nvkm_rd32(device, 0x004080) & pllmask; + if (tmp == pllmask) + break; + ) < 0) + goto resume; + + switch (clk->vsrc) { + case nv_clk_src_cclk: + mast |= 0x00400000; + fallthrough; + default: + nvkm_wr32(device, 0x4600, clk->vdiv); + } + + nvkm_wr32(device, 0xc054, mast); + +resume: + /* Disable some PLLs and dividers when unused */ + if (clk->csrc != nv_clk_src_core) { + nvkm_wr32(device, 0x4040, 0x00000000); + nvkm_mask(device, 0x4028, 0x80000000, 0x00000000); + } + + if (clk->ssrc != nv_clk_src_shader) { + nvkm_wr32(device, 0x4070, 0x00000000); + nvkm_mask(device, 0x4020, 0x80000000, 0x00000000); + } + +out: + if (ret == -EBUSY) + f = NULL; + + gt215_clk_post(&clk->base, f); + return ret; +} + +static void +mcp77_clk_tidy(struct nvkm_clk *base) +{ +} + +static const struct nvkm_clk_func +mcp77_clk = { + .read = mcp77_clk_read, + .calc = mcp77_clk_calc, + .prog = mcp77_clk_prog, + .tidy = mcp77_clk_tidy, + .domains = { + { nv_clk_src_crystal, 0xff }, + { nv_clk_src_href , 0xff }, + { nv_clk_src_core , 0xff, 0, "core", 1000 }, + { nv_clk_src_shader , 0xff, 0, "shader", 1000 }, + { nv_clk_src_vdec , 0xff, 0, "vdec", 1000 }, + { nv_clk_src_max } + } +}; + +int +mcp77_clk_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, + struct nvkm_clk **pclk) +{ + struct mcp77_clk *clk; + + if (!(clk = kzalloc(sizeof(*clk), GFP_KERNEL))) + return -ENOMEM; + *pclk = &clk->base; + + return nvkm_clk_ctor(&mcp77_clk, device, type, inst, true, &clk->base); +} |