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drm/i915/icl: Add support to read out the TBT PLL HW state

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Add support to read out the TBT PLL HW state.

Cc: Vandita Kulkarni <vandita.kulkarni@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190628143635.22066-2-imre.deak@intel.com
This commit is contained in:
Imre Deak 2019-06-28 17:36:13 +03:00
parent ec19364081
commit 39a5883f86
1 changed files with 9 additions and 2 deletions
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11
drivers/gpu/drm/i915/display/intel_display.c
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@ -9928,13 +9928,20 @@ static void icelake_get_ddi_pll(struct drm_i915_private *dev_priv,
enum intel_dpll_id id;
u32 temp;
/* TODO: TBT pll not implemented. */
if (intel_port_is_combophy(dev_priv, port)) {
temp = I915_READ(DPCLKA_CFGCR0_ICL) &
DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port);
id = temp >> DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port);
} else if (intel_port_is_tc(dev_priv, port)) {
id = icl_tc_port_to_pll_id(intel_port_to_tc(dev_priv, port));
u32 clk_sel = I915_READ(DDI_CLK_SEL(port)) & DDI_CLK_SEL_MASK;
if (clk_sel == DDI_CLK_SEL_MG) {
id = icl_tc_port_to_pll_id(intel_port_to_tc(dev_priv,
port));
} else {
WARN_ON(clk_sel < DDI_CLK_SEL_TBT_162);
id = DPLL_ID_ICL_TBTPLL;
}
} else {
WARN(1, "Invalid port %x\n", port);
return;