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drm/i915: set CB tuning also for the reduce clock

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Since the ratio is different, we also need to pass in the parameters
for the reduced clock. Might or might not reduce flicker for the
auto-downclocking on lvds/eDP.

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2013-04-04 22:20:34 +02:00
parent f0b4405687
commit 9a7c7890d2
1 changed files with 7 additions and 2 deletions
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9
drivers/gpu/drm/i915/intel_display.c
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@ -5469,7 +5469,8 @@ static void ironlake_fdi_set_m_n(struct drm_crtc *crtc)
}
static uint32_t ironlake_compute_dpll(struct intel_crtc *intel_crtc,
intel_clock_t *clock, u32 *fp)
intel_clock_t *clock, u32 *fp,
intel_clock_t *reduced_clock, u32 *fp2)
{
struct drm_crtc *crtc = &intel_crtc->base;
struct drm_device *dev = crtc->dev;
@ -5511,6 +5512,9 @@ static uint32_t ironlake_compute_dpll(struct intel_crtc *intel_crtc,
if (clock->m < factor * clock->n)
*fp |= FP_CB_TUNE;
if (fp2 && (reduced_clock->m < factor * reduced_clock->n))
*fp2 |= FP_CB_TUNE;
dpll = 0;
if (is_lvds)
@ -5626,7 +5630,8 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
fp2 = reduced_clock.n << 16 | reduced_clock.m1 << 8 |
reduced_clock.m2;
dpll = ironlake_compute_dpll(intel_crtc, &clock, &fp);
dpll = ironlake_compute_dpll(intel_crtc, &clock, &fp, &reduced_clock,
has_reduced_clock ? &fp2 : NULL);
DRM_DEBUG_KMS("Mode for pipe %d:\n", pipe);
drm_mode_debug_printmodeline(mode);