From 9a7c7890d2f05af63f98ac397597755a3c009485 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Thu, 4 Apr 2013 22:20:34 +0200 Subject: drm/i915: set CB tuning also for the reduce clock 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 Signed-off-by: Daniel Vetter diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index f235e8a..b884932 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -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); -- cgit v0.10.2