From a68d68eebc9820212186b6d02f2dce09deef0e53 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Thu, 5 Dec 2013 15:51:29 +0200 Subject: [PATCH] drm/i915: Add ILK/SNB/IVB WM latency field support MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Add a new function ilk_wm_lp_latency() which will tell us what to write into the WM_LPx register latency field. HSW is different from erlier gens in this regard. Signed-off-by: Ville Syrjälä Reviewed-by: Imre Deak Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_pm.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index be8244282742..dbd025a4f22f 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -2715,6 +2715,17 @@ static int ilk_wm_lp_to_level(int wm_lp, const struct intel_pipe_wm *pipe_wm) return wm_lp + (wm_lp >= 2 && pipe_wm->wm[4].enable); } +/* The value we need to program into the WM_LPx latency field */ +static unsigned int ilk_wm_lp_latency(struct drm_device *dev, int level) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + if (IS_HASWELL(dev)) + return 2 * level; + else + return dev_priv->wm.pri_latency[level]; +} + static void hsw_compute_wm_results(struct drm_device *dev, const struct intel_pipe_wm *merged, enum intel_ddb_partitioning partitioning, @@ -2737,7 +2748,7 @@ static void hsw_compute_wm_results(struct drm_device *dev, break; results->wm_lp[wm_lp - 1] = WM3_LP_EN | - ((level * 2) << WM1_LP_LATENCY_SHIFT) | + (ilk_wm_lp_latency(dev, level) << WM1_LP_LATENCY_SHIFT) | (r->pri_val << WM1_LP_SR_SHIFT) | r->cur_val; -- 2.20.1