[Intel-gfx] [PATCH 1/3] drm/i915: fix lost FP_CB_TUNE setting for pch plls

[Daniel Vetter]

commit de13a2e3f88a4da8e85063b6de37096795079e41
Author: Paulo Zanoni <paulo.r.zanoni at intel.com>
Date:   Thu Sep 20 18:36:05 2012 -0300

    drm/i915: extract compute_dpll from ironlake_crtc_mode_set

missed the subtle adjustment of the FP1 register. Fix this up by
passing a pointer around instead of the value.

Cc: Paulo Zanoni <paulo.r.zanoni at intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi at gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 1b2c744..f623f97 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5374,7 +5374,7 @@ 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)
 {
 	struct drm_crtc *crtc = &intel_crtc->base;
 	struct drm_device *dev = crtc->dev;
@@ -5414,7 +5414,7 @@ static uint32_t ironlake_compute_dpll(struct intel_crtc *intel_crtc,
 		factor = 20;
 
 	if (clock->m < factor * clock->n)
-		fp |= FP_CB_TUNE;
+		*fp |= FP_CB_TUNE;
 
 	dpll = 0;
 
@@ -5531,7 +5531,7 @@ 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);
 
 	DRM_DEBUG_KMS("Mode for pipe %d:\n", pipe);
 	drm_mode_debug_printmodeline(mode);
-- 
1.7.10.4