From 970888e7d130f19affc72ffbadf05b40b7693a27 Mon Sep 17 00:00:00 2001 From: Paulo Zanoni Date: Mon, 21 May 2018 17:25:44 -0700 Subject: [PATCH] drm/i915/icl: add icelake_get_ddi_pll() Implement the hardware state readout code. Thanks to Animesh Manna for spotting this problem. Cc: Animesh Manna Credits-to: Animesh Manna Reviewed-by: Lucas De Marchi Signed-off-by: Paulo Zanoni Link: https://patchwork.freedesktop.org/patch/msgid/20180522002558.29262-11-paulo.r.zanoni@intel.com --- drivers/gpu/drm/i915/intel_display.c | 42 +++++++++++++++++++++++++++++++++++- 1 file changed, 41 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 05abd23..1ac3758 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -9209,6 +9209,44 @@ static void cannonlake_get_ddi_pll(struct drm_i915_private *dev_priv, pipe_config->shared_dpll = intel_get_shared_dpll_by_id(dev_priv, id); } +static void icelake_get_ddi_pll(struct drm_i915_private *dev_priv, + enum port port, + struct intel_crtc_state *pipe_config) +{ + enum intel_dpll_id id; + u32 temp; + + /* TODO: TBT pll not implemented. */ + switch (port) { + case PORT_A: + case PORT_B: + temp = I915_READ(DPCLKA_CFGCR0_ICL) & + DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port); + id = temp >> DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port); + + if (WARN_ON(id != DPLL_ID_ICL_DPLL0 && id != DPLL_ID_ICL_DPLL1)) + return; + break; + case PORT_C: + id = DPLL_ID_ICL_MGPLL1; + break; + case PORT_D: + id = DPLL_ID_ICL_MGPLL2; + break; + case PORT_E: + id = DPLL_ID_ICL_MGPLL3; + break; + case PORT_F: + id = DPLL_ID_ICL_MGPLL4; + break; + default: + MISSING_CASE(port); + return; + } + + pipe_config->shared_dpll = intel_get_shared_dpll_by_id(dev_priv, id); +} + static void bxt_get_ddi_pll(struct drm_i915_private *dev_priv, enum port port, struct intel_crtc_state *pipe_config) @@ -9396,7 +9434,9 @@ static void haswell_get_ddi_port_state(struct intel_crtc *crtc, port = (tmp & TRANS_DDI_PORT_MASK) >> TRANS_DDI_PORT_SHIFT; - if (IS_CANNONLAKE(dev_priv)) + if (IS_ICELAKE(dev_priv)) + icelake_get_ddi_pll(dev_priv, port, pipe_config); + else if (IS_CANNONLAKE(dev_priv)) cannonlake_get_ddi_pll(dev_priv, port, pipe_config); else if (IS_GEN9_BC(dev_priv)) skylake_get_ddi_pll(dev_priv, port, pipe_config); -- 2.7.4