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drm/nouveau/bios: add proper support for opcode 0x59 

More analysis shows that this is identical to 0x79 except that it loads
the frequency indirectly from elsewhere in the VBIOS.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91025
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ilia Mirkin 2015-06-19 01:19:40 -04:00 committed by Ben Skeggs
parent 360ccb8436
commit d31b11d858
1 changed files with 20 additions and 4 deletions
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24
drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c
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@ -577,9 +577,6 @@ init_reserved(struct nvbios_init *init)
u8 length, i;
switch (opcode) {
case 0x59:
length = 7;
break;
case 0xaa:
length = 4;
break;
@ -1287,6 +1284,25 @@ init_zm_reg_sequence(struct nvbios_init *init)
}
}
/**
* INIT_PLL_INDIRECT - opcode 0x59
*
*/
static void
init_pll_indirect(struct nvbios_init *init)
{
struct nvkm_bios *bios = init->bios;
u32 reg = nv_ro32(bios, init->offset + 1);
u16 addr = nv_ro16(bios, init->offset + 5);
u32 freq = (u32)nv_ro16(bios, addr) * 1000;
trace("PLL_INDIRECT\tR[0x%06x] =PLL= VBIOS[%04x] = %dkHz\n",
reg, addr, freq);
init->offset += 7;
init_prog_pll(init, reg, freq);
}
/**
* INIT_ZM_REG_INDIRECT - opcode 0x5a
*
@ -2167,7 +2183,7 @@ static struct nvbios_init_opcode {
[0x56] = { init_condition_time },
[0x57] = { init_ltime },
[0x58] = { init_zm_reg_sequence },
[0x59] = { init_reserved },
[0x59] = { init_pll_indirect },
[0x5a] = { init_zm_reg_indirect },
[0x5b] = { init_sub_direct },
[0x5c] = { init_jump },