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>

diff --git a/drivers/gpu/drm/gma500/psb_intel_display.c b/drivers/gpu/drm/gma500/psb_intel_display.c
index 414df48..b29be00 100644 (file)
--- a/drivers/gpu/drm/gma500/psb_intel_display.c
+++ b/drivers/gpu/drm/gma500/psb_intel_display.c
@@ -127,19 +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)
-{
-       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;
-}
-
-/** 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)
+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;
@@ -147,12 +135,6 @@ static void i9xx_clock(int refclk, struct psb_intel_clock_t *clock)
        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