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drm/gma500: Calculate clock in one function instead of three identical 

i9xx_clock() and i8xx_clock() did the same calc and psb_intel_clock() just
called i9xx_clock() so just move it all into psb_intel_clock().

The same calculation is duplicated in cdv_intel_display.c as well so maybe we
can share it later on.

Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
This commit is contained in:
Patrik Jakobsson 2013-03-13 23:32:36 +01:00
parent 4e6bb70d7b
commit 1548060f48
1 changed files with 5 additions and 23 deletions
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28
drivers/gpu/drm/gma500/psb_intel_display.c
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@ -127,9 +127,7 @@ static const struct psb_intel_limit_t *psb_intel_limit(struct drm_crtc *crtc)
return limit;
}
/** Derive the pixel clock for the given refclk and divisors for 8xx chips. */
static void i8xx_clock(int refclk, struct psb_intel_clock_t *clock)
static void psb_intel_clock(int refclk, struct psb_intel_clock_t *clock)
{
clock->m = 5 * (clock->m1 + 2) + (clock->m2 + 2);
clock->p = clock->p1 * clock->p2;
@ -137,22 +135,6 @@ static void i8xx_clock(int refclk, struct psb_intel_clock_t *clock)
clock->dot = clock->vco / clock->p;
}
/** Derive the pixel clock for the given refclk and divisors for 9xx chips. */
static void i9xx_clock(int refclk, struct psb_intel_clock_t *clock)
{
clock->m = 5 * (clock->m1 + 2) + (clock->m2 + 2);
clock->p = clock->p1 * clock->p2;
clock->vco = refclk * clock->m / (clock->n + 2);
clock->dot = clock->vco / clock->p;
}
static void psb_intel_clock(struct drm_device *dev, int refclk,
struct psb_intel_clock_t *clock)
{
return i9xx_clock(refclk, clock);
}
/**
* Returns whether any output on the specified pipe is of the specified type
*/
@ -258,7 +240,7 @@ static bool psb_intel_find_best_PLL(struct drm_crtc *crtc, int target,
clock.p1++) {
int this_err;
psb_intel_clock(dev, refclk, &clock);
psb_intel_clock(refclk, &clock);
if (!psb_intel_PLL_is_valid
(crtc, &clock))
@ -1099,9 +1081,9 @@ static int psb_intel_crtc_clock_get(struct drm_device *dev,
if ((dpll & PLL_REF_INPUT_MASK) ==
PLLB_REF_INPUT_SPREADSPECTRUMIN) {
/* XXX: might not be 66MHz */
i8xx_clock(66000, &clock);
psb_intel_clock(66000, &clock);
} else
i8xx_clock(48000, &clock);
psb_intel_clock(48000, &clock);
} else {
if (dpll & PLL_P1_DIVIDE_BY_TWO)
clock.p1 = 2;
@ -1116,7 +1098,7 @@ static int psb_intel_crtc_clock_get(struct drm_device *dev,
else
clock.p2 = 2;
i8xx_clock(48000, &clock);
psb_intel_clock(48000, &clock);
}
/* XXX: It would be nice to validate the clocks, but we can't reuse