On Wed, Apr 01, 2015 at 07:59:37PM -0700, Chandra Konduru wrote:
Helper function updates supported scaling ratios based on cdclk and
crtc clocks.
v2:
-update single copy of scaling ratios (Matt)
v3:
-min scaling ratio is limited by either display engine limit or clocks,
it is not related to previous ratio (Matt, me)
Signed-off-by: Chandra Konduru chandra.kond...@intel.com
As noted on an earlier patch (and on the previous review cycle), min_vsr
and min_hvsr are never used, so we should just drop them completely for
now. min_hsr is only used in a couple trivial places, so we should
probably just replace that usage with a direct calculation of max(CONST,
clockval). That would allow us to drop this patch completely.
Matt
---
drivers/gpu/drm/i915/intel_display.c | 25 +
1 file changed, 25 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 316c4c2..8b2eff4 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4616,6 +4616,31 @@ static void haswell_mode_set_planes_workaround(struct
intel_crtc *crtc)
intel_wait_for_vblank(dev, other_active_crtc-pipe);
}
+static void skl_update_scaling_ratio(struct drm_device *dev,
+ struct intel_crtc_state *crtc_state)
+{
+ struct drm_i915_private *dev_priv = dev-dev_private;
+ uint32_t crtc_clock, cdclk;
+ struct intel_crtc_scaler_state *scaler_state;
+
+ if (!crtc_state)
+ return;
+
+ crtc_clock = (uint32_t) crtc_state-base.adjusted_mode.crtc_clock;
+ cdclk = (uint32_t) dev_priv-display.get_display_clock_speed(dev);
+
+ if (!crtc_clock || !cdclk)
+ return;
+
+ scaler_state = crtc_state-scaler_state;
+ scaler_state-min_hsr = max((uint32_t)34, (crtc_clock * 100)/cdclk);
+ scaler_state-min_vsr = max((uint32_t)34, (crtc_clock * 100)/cdclk);
+ scaler_state-min_hvsr = max((uint32_t)12, (crtc_clock * 100)/cdclk);
+
+ DRM_DEBUG_KMS(for crtc_state = %p crtc_clock = %d cdclk = %d\n,
crtc_state,
+ crtc_clock, cdclk);
+}
+
static void haswell_crtc_enable(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc-dev;
--
1.7.9.5
--
Matt Roper
Graphics Software Engineer
IoTG Platform Enabling Development
Intel Corporation
(916) 356-2795
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