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drm/i915: VLV GPU frequency to opcode functions

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When requesting frequency changes or querying status from the Punit, we
need to use an opcode that corresponds to the frequency, taking into
account the memory frequency.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Acked-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jesse Barnes 2013-04-17 15:54:57 -07:00 committed by Daniel Vetter
parent 06da8da2b0
commit 855ba3be12
2 changed files with 58 additions and 0 deletions
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2
drivers/gpu/drm/i915/i915_drv.h
View File

@ -1887,6 +1887,8 @@ int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u8 mbox, u32 *val)
int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u8 mbox, u32 val);
int valleyview_punit_read(struct drm_i915_private *dev_priv, u8 addr, u32 *val);
int valleyview_punit_write(struct drm_i915_private *dev_priv, u8 addr, u32 val);
int vlv_gpu_freq(int ddr_freq, int val);
int vlv_freq_opcode(int ddr_freq, int val);
#define __i915_read(x, y) \
u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg);

56
drivers/gpu/drm/i915/intel_pm.c
View File

@ -4620,3 +4620,59 @@ int valleyview_punit_write(struct drm_i915_private *dev_priv, u8 addr, u32 val)
{
return vlv_punit_rw(dev_priv, PUNIT_OPCODE_REG_WRITE, addr, &val);
}
int vlv_gpu_freq(int ddr_freq, int val)
{
int mult, base;
switch (ddr_freq) {
case 800:
mult = 20;
base = 120;
break;
case 1066:
mult = 22;
base = 133;
break;
case 1333:
mult = 21;
base = 125;
break;
default:
return -1;
}
return ((val - 0xbd) * mult) + base;
}
int vlv_freq_opcode(int ddr_freq, int val)
{
int mult, base;
switch (ddr_freq) {
case 800:
mult = 20;
base = 120;
break;
case 1066:
mult = 22;
base = 133;
break;
case 1333:
mult = 21;
base = 125;
break;
default:
return -1;
}
val /= mult;
val -= base / mult;
val += 0xbd;
if (val > 0xea)
val = 0xea;
return val;
}