From 1be4d3793d5a93daddcd9be657c429b38ad750a3 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Mon, 28 Nov 2016 19:37:05 +0200 Subject: [PATCH] drm/i915: Fix the level 0 max_wm hack on VLV/CHV MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The watermark should never exceed the FIFO size, so we need to check against the current FIFO size instead of the theoretical maximum when we clamp the level 0 watermark. Signed-off-by: Ville Syrjälä Link: http://patchwork.freedesktop.org/patch/msgid/1480354637-14209-4-git-send-email-ville.syrjala@linux.intel.com Reviewed-by: Maarten Lankhorst --- drivers/gpu/drm/i915/intel_pm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 59a88de8..8ff1e23 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -1132,13 +1132,13 @@ static void vlv_compute_wm(struct intel_crtc *crtc) /* normal watermarks */ for (level = 0; level < wm_state->num_levels; level++) { int wm = vlv_compute_wm_level(plane, crtc, state, level); - int max_wm = plane->base.type == DRM_PLANE_TYPE_CURSOR ? 63 : 511; + int max_wm = plane->wm.fifo_size; /* hack */ if (WARN_ON(level == 0 && wm > max_wm)) wm = max_wm; - if (wm > plane->wm.fifo_size) + if (wm > max_wm) break; switch (plane->base.type) { -- 2.7.4