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drm/i915/icl: compute the TBT PLL registers

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Use the hardcoded tables provided by our spec.

v2:
  - SSC stays disabled.
  - Use intel_port_is_tc().

Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180711215909.23945-2-paulo.r.zanoni@intel.com
This commit is contained in:
Paulo Zanoni 2018-07-11 14:59:02 -07:00
parent 516a49cc19
commit f7a738fca0
1 changed files with 21 additions and 1 deletions
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22
drivers/gpu/drm/i915/intel_dpll_mgr.c
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@ -2452,6 +2452,16 @@ static const struct skl_wrpll_params icl_dp_combo_pll_19_2MHz_values[] = {
.pdiv = 0x1 /* 2 */, .kdiv = 1, .qdiv_mode = 0, .qdiv_ratio = 0},
};
static const struct skl_wrpll_params icl_tbt_pll_24MHz_values = {
.dco_integer = 0x151, .dco_fraction = 0x4000,
.pdiv = 0x4 /* 5 */, .kdiv = 1, .qdiv_mode = 0, .qdiv_ratio = 0,
};
static const struct skl_wrpll_params icl_tbt_pll_19_2MHz_values = {
.dco_integer = 0x1A5, .dco_fraction = 0x7000,
.pdiv = 0x4 /* 5 */, .kdiv = 1, .qdiv_mode = 0, .qdiv_ratio = 0,
};
static bool icl_calc_dp_combo_pll(struct drm_i915_private *dev_priv, int clock,
struct skl_wrpll_params *pll_params)
{
@ -2494,6 +2504,14 @@ static bool icl_calc_dp_combo_pll(struct drm_i915_private *dev_priv, int clock,
return true;
}
static bool icl_calc_tbt_pll(struct drm_i915_private *dev_priv, int clock,
struct skl_wrpll_params *pll_params)
{
*pll_params = dev_priv->cdclk.hw.ref == 24000 ?
icl_tbt_pll_24MHz_values : icl_tbt_pll_19_2MHz_values;
return true;
}
static bool icl_calc_dpll_state(struct intel_crtc_state *crtc_state,
struct intel_encoder *encoder, int clock,
struct intel_dpll_hw_state *pll_state)
@ -2503,7 +2521,9 @@ static bool icl_calc_dpll_state(struct intel_crtc_state *crtc_state,
struct skl_wrpll_params pll_params = { 0 };
bool ret;
if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
if (intel_port_is_tc(dev_priv, encoder->port))
ret = icl_calc_tbt_pll(dev_priv, clock, &pll_params);
else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
ret = cnl_ddi_calculate_wrpll(clock, dev_priv, &pll_params);
else
ret = icl_calc_dp_combo_pll(dev_priv, clock, &pll_params);