Add support to read out the TBT PLL HW state.
Cc: Vandita Kulkarni <vandita.kulka...@intel.com>
Cc: Paulo Zanoni <paulo.r.zan...@intel.com>
Cc: Lucas De Marchi <lucas.demar...@intel.com>
Signed-off-by: Imre Deak <imre.d...@intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index fc47ed0247c5..26474788b7b2 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9859,13 +9859,20 @@ 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;
--
2.17.1
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