diff options
| author |   Clint Taylor <clinton.a.taylor@intel.com> | 2016-05-13 23:41:21 +0300 |
|---|---|---|
| committer |   Ville Syrjälä <ville.syrjala@linux.intel.com> | 2016-05-23 21:10:55 +0300 |
| commit | c89e39f32763bbaeba0b66606bda7893a25489ac (patch) | |
| tree | 4f99d2edf70e83ba6b3f13cf08990ceb87873ecb /drivers/gpu/drm/i915/intel_dpll_mgr.c | |
| parent | drm/i915: Fix BXT min_pixclk after state readout (diff) | |
| download | linux-dev-c89e39f32763bbaeba0b66606bda7893a25489ac.tar.xz linux-dev-c89e39f32763bbaeba0b66606bda7893a25489ac.zip | |
drm/i915/skl: SKL CDCLK change on modeset tracking VCO
WARNING: Using ChromeOS with an eDP panel and a 4K@60 DP monitor connected
to DDI1 the system will hard hang during a cold boot. Occurs when DDI1
is enabled when the cdclk is less then required. DP connected to DDI2
and HPD on either port works correctly.
Set cdclk based on the max required pixel clock based on VCO
selected. Track boot vco instead of boot cdclk.
The vco is now tracked at the atomic level and all CRTCs updated if
the required vco is changed. Not tested with eDP v1.4 panels that
require 8640 vco due to availability.
V1: initial version
V2: add vco tracking in intel_dp_compute_config(), rename
skl_boot_cdclk.
V3: rebase, V2 feedback not possible as encoders are not aware of
atomic.
V4: track target vco is atomic state. modeset all CRTCs if vco changes
V5: rename atomic variable, cleaner if/else logic, use existing vco if
encoder does not return a new vco value. check_patch.pl cleanup
V6: simplify logic in intel_modeset_checks.
V7: reorder an IF for readability and whitespace fix.
V8: use dev_cdclk for tracking new cdclk during atomic
V9: correctly handle vco 8640 when crtcs==0
V10: Clean up if else in crtcs==0
V11: Rebase for new intel_dpll_mgr.c
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Clint Taylor <clinton.a.taylor@intel.com>
[vsyrjala: rebased due to churn]
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1463172100-24715-3-git-send-email-ville.syrjala@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dpll_mgr.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dpll_mgr.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_dpll_mgr.c b/drivers/gpu/drm/i915/intel_dpll_mgr.c index c283ba4babe8..e99e306e8743 100644 --- a/drivers/gpu/drm/i915/intel_dpll_mgr.c +++ b/drivers/gpu/drm/i915/intel_dpll_mgr.c @@ -1194,6 +1194,7 @@ skl_get_dpll(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state, struct intel_shared_dpll *pll; uint32_t ctrl1, cfgcr1, cfgcr2; int clock = crtc_state->port_clock; + uint32_t vco = 8100; /* * See comment in intel_dpll_hw_state to understand why we always use 0 @@ -1236,17 +1237,17 @@ skl_get_dpll(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state, case 162000: ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1620, 0); break; - /* TBD: For DP link rates 2.16 GHz and 4.32 GHz, VCO is 8640 which - results in CDCLK change. Need to handle the change of CDCLK by - disabling pipes and re-enabling them */ case 108000: ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080, 0); + vco = 8640; break; case 216000: ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2160, 0); + vco = 8640; break; } + to_intel_atomic_state(crtc_state->base.state)->cdclk_pll_vco = vco; cfgcr1 = cfgcr2 = 0; } else { return NULL; @@ -1639,7 +1640,7 @@ static void intel_ddi_pll_init(struct drm_device *dev) int cdclk_freq; cdclk_freq = dev_priv->display.get_display_clock_speed(dev); - dev_priv->skl_boot_cdclk = cdclk_freq; + dev_priv->skl_vco_freq = skl_cdclk_get_vco(cdclk_freq); if (skl_sanitize_cdclk(dev_priv)) DRM_DEBUG_KMS("Sanitized cdclk programmed by pre-os\n"); if (!(I915_READ(LCPLL1_CTL) & LCPLL_PLL_ENABLE)) |