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drm/i915: Move the SKL DPLL0 VCO computation into intel_dp_compute_config()

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Shared plls won't get assigned until the .compute_clocks() hook gets
called, which happens from the crtc .atomic_check hook. That's too late
as the cdclk computation has already happened. So let's move the DPLL0
VCO computation into intel_dp_compute_config() so that it's done when
the cdclk computation happens. Also only do it for eDP since we only
pick DPLL0 for eDP.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1463172100-24715-4-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Imre Deak <imre.deak@intel.com>
This commit is contained in:
Ville Syrjälä 2016-05-13 23:41:22 +03:00
parent c89e39f327
commit 14d41b3b0e
2 changed files with 21 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/gpu/drm/i915/intel_dp.c
View File

@ -1578,6 +1578,27 @@ found:
&pipe_config->dp_m2_n2);
}
/*
* DPLL0 VCO may need to be adjusted to get the correct
* clock for eDP. This will affect cdclk as well.
*/
if (is_edp(intel_dp) &&
(IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))) {
int vco;
switch (pipe_config->port_clock / 2) {
case 108000:
case 216000:
vco = 8640;
break;
default:
vco = 8100;
break;
}
to_intel_atomic_state(pipe_config->base.state)->cdclk_pll_vco = vco;
}
if (!HAS_DDI(dev))
intel_dp_set_clock(encoder, pipe_config);

4
drivers/gpu/drm/i915/intel_dpll_mgr.c
View File

@ -1194,7 +1194,6 @@ 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
@ -1239,15 +1238,12 @@ skl_get_dpll(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state,
break;
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;