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path: root/drivers/gpu/drm/nouveau/nouveau_bios.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_bios.c')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_bios.c519
1 files changed, 7 insertions, 512 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c
index 35b0a8f9c008..98eaac9da30e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bios.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.c
@@ -441,70 +441,6 @@ io_condition_met(struct nvbios *bios, uint16_t offset, uint8_t cond)
return (data == cmpval);
}
-static int
-nv50_pll_set(struct drm_device *dev, uint32_t reg, uint32_t clk)
-{
- struct drm_nouveau_private *dev_priv = dev->dev_private;
- struct nouveau_pll_vals pll;
- struct pll_lims pll_limits;
- u32 ctrl, mask, coef;
- int ret;
-
- ret = get_pll_limits(dev, reg, &pll_limits);
- if (ret)
- return ret;
-
- clk = nouveau_calc_pll_mnp(dev, &pll_limits, clk, &pll);
- if (!clk)
- return -ERANGE;
-
- coef = pll.N1 << 8 | pll.M1;
- ctrl = pll.log2P << 16;
- mask = 0x00070000;
- if (reg == 0x004008) {
- mask |= 0x01f80000;
- ctrl |= (pll_limits.log2p_bias << 19);
- ctrl |= (pll.log2P << 22);
- }
-
- if (!dev_priv->vbios.execute)
- return 0;
-
- nv_mask(dev, reg + 0, mask, ctrl);
- nv_wr32(dev, reg + 4, coef);
- return 0;
-}
-
-static int
-setPLL(struct nvbios *bios, uint32_t reg, uint32_t clk)
-{
- struct drm_device *dev = bios->dev;
- struct drm_nouveau_private *dev_priv = dev->dev_private;
- /* clk in kHz */
- struct pll_lims pll_lim;
- struct nouveau_pll_vals pllvals;
- int ret;
-
- if (dev_priv->card_type >= NV_50)
- return nv50_pll_set(dev, reg, clk);
-
- /* high regs (such as in the mac g5 table) are not -= 4 */
- ret = get_pll_limits(dev, reg > 0x405c ? reg : reg - 4, &pll_lim);
- if (ret)
- return ret;
-
- clk = nouveau_calc_pll_mnp(dev, &pll_lim, clk, &pllvals);
- if (!clk)
- return -ERANGE;
-
- if (bios->execute) {
- still_alive();
- nouveau_hw_setpll(dev, reg, &pllvals);
- }
-
- return 0;
-}
-
static int dcb_entry_idx_from_crtchead(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
@@ -752,7 +688,7 @@ init_io_restrict_pll(struct nvbios *bios, uint16_t offset,
BIOSLOG(bios, "0x%04X: Reg: 0x%08X, Config: 0x%02X, Freq: %d0kHz\n",
offset, reg, config, freq);
- setPLL(bios, reg, freq * 10);
+ setPLL(bios->dev, reg, freq * 10);
return len;
}
@@ -1110,7 +1046,7 @@ init_io_restrict_pll2(struct nvbios *bios, uint16_t offset,
BIOSLOG(bios, "0x%04X: Reg: 0x%08X, Config: 0x%02X, Freq: %dkHz\n",
offset, reg, config, freq);
- setPLL(bios, reg, freq);
+ setPLL(bios->dev, reg, freq);
return len;
}
@@ -1137,7 +1073,7 @@ init_pll2(struct nvbios *bios, uint16_t offset, struct init_exec *iexec)
BIOSLOG(bios, "0x%04X: Reg: 0x%04X, Freq: %dkHz\n",
offset, reg, freq);
- setPLL(bios, reg, freq);
+ setPLL(bios->dev, reg, freq);
return 9;
}
@@ -2376,12 +2312,12 @@ init_configure_clk(struct nvbios *bios, uint16_t offset,
return 0;
clock = ROM16(bios->data[meminitoffs + 4]) * 10;
- setPLL(bios, NV_PRAMDAC_NVPLL_COEFF, clock);
+ setPLL(bios->dev, NV_PRAMDAC_NVPLL_COEFF, clock);
clock = ROM16(bios->data[meminitoffs + 2]) * 10;
if (bios->data[meminitoffs] & 1) /* DDR */
clock *= 2;
- setPLL(bios, NV_PRAMDAC_MPLL_COEFF, clock);
+ setPLL(bios->dev, NV_PRAMDAC_MPLL_COEFF, clock);
return 1;
}
@@ -2820,7 +2756,7 @@ init_pll(struct nvbios *bios, uint16_t offset, struct init_exec *iexec)
BIOSLOG(bios, "0x%04X: Reg: 0x%08X, Freq: %d0kHz\n", offset, reg, freq);
- setPLL(bios, reg, freq * 10);
+ setPLL(bios->dev, reg, freq * 10);
return 7;
}
@@ -2898,7 +2834,7 @@ init_ram_restrict_pll(struct nvbios *bios, uint16_t offset,
"Type %02x Reg 0x%08x Freq %dKHz\n",
offset, type, reg, freq);
- setPLL(bios, reg, freq);
+ setPLL(bios->dev, reg, freq);
return len;
}
}
@@ -4305,447 +4241,6 @@ int run_tmds_table(struct drm_device *dev, struct dcb_entry *dcbent, int head, i
return 0;
}
-struct pll_mapping {
- u8 type;
- u32 reg;
-};
-
-static struct pll_mapping nv04_pll_mapping[] = {
- { PLL_CORE , NV_PRAMDAC_NVPLL_COEFF },
- { PLL_MEMORY, NV_PRAMDAC_MPLL_COEFF },
- { PLL_VPLL0 , NV_PRAMDAC_VPLL_COEFF },
- { PLL_VPLL1 , NV_RAMDAC_VPLL2 },
- {}
-};
-
-static struct pll_mapping nv40_pll_mapping[] = {
- { PLL_CORE , 0x004000 },
- { PLL_MEMORY, 0x004020 },
- { PLL_VPLL0 , NV_PRAMDAC_VPLL_COEFF },
- { PLL_VPLL1 , NV_RAMDAC_VPLL2 },
- {}
-};
-
-static struct pll_mapping nv50_pll_mapping[] = {
- { PLL_CORE , 0x004028 },
- { PLL_SHADER, 0x004020 },
- { PLL_UNK03 , 0x004000 },
- { PLL_MEMORY, 0x004008 },
- { PLL_UNK40 , 0x00e810 },
- { PLL_UNK41 , 0x00e818 },
- { PLL_UNK42 , 0x00e824 },
- { PLL_VPLL0 , 0x614100 },
- { PLL_VPLL1 , 0x614900 },
- {}
-};
-
-static struct pll_mapping nv84_pll_mapping[] = {
- { PLL_CORE , 0x004028 },
- { PLL_SHADER, 0x004020 },
- { PLL_MEMORY, 0x004008 },
- { PLL_VDEC , 0x004030 },
- { PLL_UNK41 , 0x00e818 },
- { PLL_VPLL0 , 0x614100 },
- { PLL_VPLL1 , 0x614900 },
- {}
-};
-
-u32
-get_pll_register(struct drm_device *dev, enum pll_types type)
-{
- struct drm_nouveau_private *dev_priv = dev->dev_private;
- struct nvbios *bios = &dev_priv->vbios;
- struct pll_mapping *map;
- int i;
-
- if (dev_priv->card_type < NV_40)
- map = nv04_pll_mapping;
- else
- if (dev_priv->card_type < NV_50)
- map = nv40_pll_mapping;
- else {
- u8 *plim = &bios->data[bios->pll_limit_tbl_ptr];
-
- if (plim[0] >= 0x30) {
- u8 *entry = plim + plim[1];
- for (i = 0; i < plim[3]; i++, entry += plim[2]) {
- if (entry[0] == type)
- return ROM32(entry[3]);
- }
-
- return 0;
- }
-
- if (dev_priv->chipset == 0x50)
- map = nv50_pll_mapping;
- else
- map = nv84_pll_mapping;
- }
-
- while (map->reg) {
- if (map->type == type)
- return map->reg;
- map++;
- }
-
- return 0;
-}
-
-int get_pll_limits(struct drm_device *dev, uint32_t limit_match, struct pll_lims *pll_lim)
-{
- /*
- * PLL limits table
- *
- * Version 0x10: NV30, NV31
- * One byte header (version), one record of 24 bytes
- * Version 0x11: NV36 - Not implemented
- * Seems to have same record style as 0x10, but 3 records rather than 1
- * Version 0x20: Found on Geforce 6 cards
- * Trivial 4 byte BIT header. 31 (0x1f) byte record length
- * Version 0x21: Found on Geforce 7, 8 and some Geforce 6 cards
- * 5 byte header, fifth byte of unknown purpose. 35 (0x23) byte record
- * length in general, some (integrated) have an extra configuration byte
- * Version 0x30: Found on Geforce 8, separates the register mapping
- * from the limits tables.
- */
-
- struct drm_nouveau_private *dev_priv = dev->dev_private;
- struct nvbios *bios = &dev_priv->vbios;
- int cv = bios->chip_version, pllindex = 0;
- uint8_t pll_lim_ver = 0, headerlen = 0, recordlen = 0, entries = 0;
- uint32_t crystal_strap_mask, crystal_straps;
-
- if (!bios->pll_limit_tbl_ptr) {
- if (cv == 0x30 || cv == 0x31 || cv == 0x35 || cv == 0x36 ||
- cv >= 0x40) {
- NV_ERROR(dev, "Pointer to PLL limits table invalid\n");
- return -EINVAL;
- }
- } else
- pll_lim_ver = bios->data[bios->pll_limit_tbl_ptr];
-
- crystal_strap_mask = 1 << 6;
- /* open coded dev->twoHeads test */
- if (cv > 0x10 && cv != 0x15 && cv != 0x1a && cv != 0x20)
- crystal_strap_mask |= 1 << 22;
- crystal_straps = nvReadEXTDEV(dev, NV_PEXTDEV_BOOT_0) &
- crystal_strap_mask;
-
- switch (pll_lim_ver) {
- /*
- * We use version 0 to indicate a pre limit table bios (single stage
- * pll) and load the hard coded limits instead.
- */
- case 0:
- break;
- case 0x10:
- case 0x11:
- /*
- * Strictly v0x11 has 3 entries, but the last two don't seem
- * to get used.
- */
- headerlen = 1;
- recordlen = 0x18;
- entries = 1;
- pllindex = 0;
- break;
- case 0x20:
- case 0x21:
- case 0x30:
- case 0x40:
- headerlen = bios->data[bios->pll_limit_tbl_ptr + 1];
- recordlen = bios->data[bios->pll_limit_tbl_ptr + 2];
- entries = bios->data[bios->pll_limit_tbl_ptr + 3];
- break;
- default:
- NV_ERROR(dev, "PLL limits table revision 0x%X not currently "
- "supported\n", pll_lim_ver);
- return -ENOSYS;
- }
-
- /* initialize all members to zero */
- memset(pll_lim, 0, sizeof(struct pll_lims));
-
- /* if we were passed a type rather than a register, figure
- * out the register and store it
- */
- if (limit_match > PLL_MAX)
- pll_lim->reg = limit_match;
- else {
- pll_lim->reg = get_pll_register(dev, limit_match);
- if (!pll_lim->reg)
- return -ENOENT;
- }
-
- if (pll_lim_ver == 0x10 || pll_lim_ver == 0x11) {
- uint8_t *pll_rec = &bios->data[bios->pll_limit_tbl_ptr + headerlen + recordlen * pllindex];
-
- pll_lim->vco1.minfreq = ROM32(pll_rec[0]);
- pll_lim->vco1.maxfreq = ROM32(pll_rec[4]);
- pll_lim->vco2.minfreq = ROM32(pll_rec[8]);
- pll_lim->vco2.maxfreq = ROM32(pll_rec[12]);
- pll_lim->vco1.min_inputfreq = ROM32(pll_rec[16]);
- pll_lim->vco2.min_inputfreq = ROM32(pll_rec[20]);
- pll_lim->vco1.max_inputfreq = pll_lim->vco2.max_inputfreq = INT_MAX;
-
- /* these values taken from nv30/31/36 */
- pll_lim->vco1.min_n = 0x1;
- if (cv == 0x36)
- pll_lim->vco1.min_n = 0x5;
- pll_lim->vco1.max_n = 0xff;
- pll_lim->vco1.min_m = 0x1;
- pll_lim->vco1.max_m = 0xd;
- pll_lim->vco2.min_n = 0x4;
- /*
- * On nv30, 31, 36 (i.e. all cards with two stage PLLs with this
- * table version (apart from nv35)), N2 is compared to
- * maxN2 (0x46) and 10 * maxM2 (0x4), so set maxN2 to 0x28 and
- * save a comparison
- */
- pll_lim->vco2.max_n = 0x28;
- if (cv == 0x30 || cv == 0x35)
- /* only 5 bits available for N2 on nv30/35 */
- pll_lim->vco2.max_n = 0x1f;
- pll_lim->vco2.min_m = 0x1;
- pll_lim->vco2.max_m = 0x4;
- pll_lim->max_log2p = 0x7;
- pll_lim->max_usable_log2p = 0x6;
- } else if (pll_lim_ver == 0x20 || pll_lim_ver == 0x21) {
- uint16_t plloffs = bios->pll_limit_tbl_ptr + headerlen;
- uint8_t *pll_rec;
- int i;
-
- /*
- * First entry is default match, if nothing better. warn if
- * reg field nonzero
- */
- if (ROM32(bios->data[plloffs]))
- NV_WARN(dev, "Default PLL limit entry has non-zero "
- "register field\n");
-
- for (i = 1; i < entries; i++)
- if (ROM32(bios->data[plloffs + recordlen * i]) == pll_lim->reg) {
- pllindex = i;
- break;
- }
-
- if ((dev_priv->card_type >= NV_50) && (pllindex == 0)) {
- NV_ERROR(dev, "Register 0x%08x not found in PLL "
- "limits table", pll_lim->reg);
- return -ENOENT;
- }
-
- pll_rec = &bios->data[plloffs + recordlen * pllindex];
-
- BIOSLOG(bios, "Loading PLL limits for reg 0x%08x\n",
- pllindex ? pll_lim->reg : 0);
-
- /*
- * Frequencies are stored in tables in MHz, kHz are more
- * useful, so we convert.
- */
-
- /* What output frequencies can each VCO generate? */
- pll_lim->vco1.minfreq = ROM16(pll_rec[4]) * 1000;
- pll_lim->vco1.maxfreq = ROM16(pll_rec[6]) * 1000;
- pll_lim->vco2.minfreq = ROM16(pll_rec[8]) * 1000;
- pll_lim->vco2.maxfreq = ROM16(pll_rec[10]) * 1000;
-
- /* What input frequencies they accept (past the m-divider)? */
- pll_lim->vco1.min_inputfreq = ROM16(pll_rec[12]) * 1000;
- pll_lim->vco2.min_inputfreq = ROM16(pll_rec[14]) * 1000;
- pll_lim->vco1.max_inputfreq = ROM16(pll_rec[16]) * 1000;
- pll_lim->vco2.max_inputfreq = ROM16(pll_rec[18]) * 1000;
-
- /* What values are accepted as multiplier and divider? */
- pll_lim->vco1.min_n = pll_rec[20];
- pll_lim->vco1.max_n = pll_rec[21];
- pll_lim->vco1.min_m = pll_rec[22];
- pll_lim->vco1.max_m = pll_rec[23];
- pll_lim->vco2.min_n = pll_rec[24];
- pll_lim->vco2.max_n = pll_rec[25];
- pll_lim->vco2.min_m = pll_rec[26];
- pll_lim->vco2.max_m = pll_rec[27];
-
- pll_lim->max_usable_log2p = pll_lim->max_log2p = pll_rec[29];
- if (pll_lim->max_log2p > 0x7)
- /* pll decoding in nv_hw.c assumes never > 7 */
- NV_WARN(dev, "Max log2 P value greater than 7 (%d)\n",
- pll_lim->max_log2p);
- if (cv < 0x60)
- pll_lim->max_usable_log2p = 0x6;
- pll_lim->log2p_bias = pll_rec[30];
-
- if (recordlen > 0x22)
- pll_lim->refclk = ROM32(pll_rec[31]);
-
- if (recordlen > 0x23 && pll_rec[35])
- NV_WARN(dev,
- "Bits set in PLL configuration byte (%x)\n",
- pll_rec[35]);
-
- /* C51 special not seen elsewhere */
- if (cv == 0x51 && !pll_lim->refclk) {
- uint32_t sel_clk = bios_rd32(bios, NV_PRAMDAC_SEL_CLK);
-
- if ((pll_lim->reg == NV_PRAMDAC_VPLL_COEFF && sel_clk & 0x20) ||
- (pll_lim->reg == NV_RAMDAC_VPLL2 && sel_clk & 0x80)) {
- if (bios_idxprt_rd(bios, NV_CIO_CRX__COLOR, NV_CIO_CRE_CHIP_ID_INDEX) < 0xa3)
- pll_lim->refclk = 200000;
- else
- pll_lim->refclk = 25000;
- }
- }
- } else if (pll_lim_ver == 0x30) { /* ver 0x30 */
- uint8_t *entry = &bios->data[bios->pll_limit_tbl_ptr + headerlen];
- uint8_t *record = NULL;
- int i;
-
- BIOSLOG(bios, "Loading PLL limits for register 0x%08x\n",
- pll_lim->reg);
-
- for (i = 0; i < entries; i++, entry += recordlen) {
- if (ROM32(entry[3]) == pll_lim->reg) {
- record = &bios->data[ROM16(entry[1])];
- break;
- }
- }
-
- if (!record) {
- NV_ERROR(dev, "Register 0x%08x not found in PLL "
- "limits table", pll_lim->reg);
- return -ENOENT;
- }
-
- pll_lim->vco1.minfreq = ROM16(record[0]) * 1000;
- pll_lim->vco1.maxfreq = ROM16(record[2]) * 1000;
- pll_lim->vco2.minfreq = ROM16(record[4]) * 1000;
- pll_lim->vco2.maxfreq = ROM16(record[6]) * 1000;
- pll_lim->vco1.min_inputfreq = ROM16(record[8]) * 1000;
- pll_lim->vco2.min_inputfreq = ROM16(record[10]) * 1000;
- pll_lim->vco1.max_inputfreq = ROM16(record[12]) * 1000;
- pll_lim->vco2.max_inputfreq = ROM16(record[14]) * 1000;
- pll_lim->vco1.min_n = record[16];
- pll_lim->vco1.max_n = record[17];
- pll_lim->vco1.min_m = record[18];
- pll_lim->vco1.max_m = record[19];
- pll_lim->vco2.min_n = record[20];
- pll_lim->vco2.max_n = record[21];
- pll_lim->vco2.min_m = record[22];
- pll_lim->vco2.max_m = record[23];
- pll_lim->max_usable_log2p = pll_lim->max_log2p = record[25];
- pll_lim->log2p_bias = record[27];
- pll_lim->refclk = ROM32(record[28]);
- } else if (pll_lim_ver) { /* ver 0x40 */
- uint8_t *entry = &bios->data[bios->pll_limit_tbl_ptr + headerlen];
- uint8_t *record = NULL;
- int i;
-
- BIOSLOG(bios, "Loading PLL limits for register 0x%08x\n",
- pll_lim->reg);
-
- for (i = 0; i < entries; i++, entry += recordlen) {
- if (ROM32(entry[3]) == pll_lim->reg) {
- record = &bios->data[ROM16(entry[1])];
- break;
- }
- }
-
- if (!record) {
- NV_ERROR(dev, "Register 0x%08x not found in PLL "
- "limits table", pll_lim->reg);
- return -ENOENT;
- }
-
- pll_lim->vco1.minfreq = ROM16(record[0]) * 1000;
- pll_lim->vco1.maxfreq = ROM16(record[2]) * 1000;
- pll_lim->vco1.min_inputfreq = ROM16(record[4]) * 1000;
- pll_lim->vco1.max_inputfreq = ROM16(record[6]) * 1000;
- pll_lim->vco1.min_m = record[8];
- pll_lim->vco1.max_m = record[9];
- pll_lim->vco1.min_n = record[10];
- pll_lim->vco1.max_n = record[11];
- pll_lim->min_p = record[12];
- pll_lim->max_p = record[13];
- pll_lim->refclk = ROM16(entry[9]) * 1000;
- }
-
- /*
- * By now any valid limit table ought to have set a max frequency for
- * vco1, so if it's zero it's either a pre limit table bios, or one
- * with an empty limit table (seen on nv18)
- */
- if (!pll_lim->vco1.maxfreq) {
- pll_lim->vco1.minfreq = bios->fminvco;
- pll_lim->vco1.maxfreq = bios->fmaxvco;
- pll_lim->vco1.min_inputfreq = 0;
- pll_lim->vco1.max_inputfreq = INT_MAX;
- pll_lim->vco1.min_n = 0x1;
- pll_lim->vco1.max_n = 0xff;
- pll_lim->vco1.min_m = 0x1;
- if (crystal_straps == 0) {
- /* nv05 does this, nv11 doesn't, nv10 unknown */
- if (cv < 0x11)
- pll_lim->vco1.min_m = 0x7;
- pll_lim->vco1.max_m = 0xd;
- } else {
- if (cv < 0x11)
- pll_lim->vco1.min_m = 0x8;
- pll_lim->vco1.max_m = 0xe;
- }
- if (cv < 0x17 || cv == 0x1a || cv == 0x20)
- pll_lim->max_log2p = 4;
- else
- pll_lim->max_log2p = 5;
- pll_lim->max_usable_log2p = pll_lim->max_log2p;
- }
-
- if (!pll_lim->refclk)
- switch (crystal_straps) {
- case 0:
- pll_lim->refclk = 13500;
- break;
- case (1 << 6):
- pll_lim->refclk = 14318;
- break;
- case (1 << 22):
- pll_lim->refclk = 27000;
- break;
- case (1 << 22 | 1 << 6):
- pll_lim->refclk = 25000;
- break;
- }
-
- NV_DEBUG(dev, "pll.vco1.minfreq: %d\n", pll_lim->vco1.minfreq);
- NV_DEBUG(dev, "pll.vco1.maxfreq: %d\n", pll_lim->vco1.maxfreq);
- NV_DEBUG(dev, "pll.vco1.min_inputfreq: %d\n", pll_lim->vco1.min_inputfreq);
- NV_DEBUG(dev, "pll.vco1.max_inputfreq: %d\n", pll_lim->vco1.max_inputfreq);
- NV_DEBUG(dev, "pll.vco1.min_n: %d\n", pll_lim->vco1.min_n);
- NV_DEBUG(dev, "pll.vco1.max_n: %d\n", pll_lim->vco1.max_n);
- NV_DEBUG(dev, "pll.vco1.min_m: %d\n", pll_lim->vco1.min_m);
- NV_DEBUG(dev, "pll.vco1.max_m: %d\n", pll_lim->vco1.max_m);
- if (pll_lim->vco2.maxfreq) {
- NV_DEBUG(dev, "pll.vco2.minfreq: %d\n", pll_lim->vco2.minfreq);
- NV_DEBUG(dev, "pll.vco2.maxfreq: %d\n", pll_lim->vco2.maxfreq);
- NV_DEBUG(dev, "pll.vco2.min_inputfreq: %d\n", pll_lim->vco2.min_inputfreq);
- NV_DEBUG(dev, "pll.vco2.max_inputfreq: %d\n", pll_lim->vco2.max_inputfreq);
- NV_DEBUG(dev, "pll.vco2.min_n: %d\n", pll_lim->vco2.min_n);
- NV_DEBUG(dev, "pll.vco2.max_n: %d\n", pll_lim->vco2.max_n);
- NV_DEBUG(dev, "pll.vco2.min_m: %d\n", pll_lim->vco2.min_m);
- NV_DEBUG(dev, "pll.vco2.max_m: %d\n", pll_lim->vco2.max_m);
- }
- if (!pll_lim->max_p) {
- NV_DEBUG(dev, "pll.max_log2p: %d\n", pll_lim->max_log2p);
- NV_DEBUG(dev, "pll.log2p_bias: %d\n", pll_lim->log2p_bias);
- } else {
- NV_DEBUG(dev, "pll.min_p: %d\n", pll_lim->min_p);
- NV_DEBUG(dev, "pll.max_p: %d\n", pll_lim->max_p);
- }
- NV_DEBUG(dev, "pll.refclk: %d\n", pll_lim->refclk);
-
- return 0;
-}
-
static void parse_bios_version(struct drm_device *dev, struct nvbios *bios, uint16_t offset)
{
/*
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 08:32:11 +0100