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.
Signed-off-by: Daniel Vetter <daniel.vet...@ffwll.ch>
---
drivers/gpu/drm/i915/intel_display.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index cb3e23f..c7c135c 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5374,7 +5374,8 @@ 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;
@@ -5416,6 +5417,9 @@ 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)
@@ -5531,7 +5535,8 @@ 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);
--
1.7.10.4
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