diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 9 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ddi.c | 23 |
2 files changed, 29 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 539e44e88e01..f9e329ada437 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -8134,6 +8134,15 @@ enum { #define DPLL_CFGCR1(id) _MMIO_PIPE((id) - SKL_DPLL1, _DPLL1_CFGCR1, _DPLL2_CFGCR1) #define DPLL_CFGCR2(id) _MMIO_PIPE((id) - SKL_DPLL1, _DPLL1_CFGCR2, _DPLL2_CFGCR2) +/* + * CNL Clocks + */ +#define DPCLKA_CFGCR0 _MMIO(0x6C200) +#define DPCLKA_CFGCR0_DDI_CLK_OFF(port) (1 << ((port)+10)) +#define DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port) (3 << ((port)*2)) +#define DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port) ((port)*2) +#define DPCLKA_CFGCR0_DDI_CLK_SEL(pll, port) ((pll) << ((port)*2)) + /* BXT display engine PLL */ #define BXT_DE_PLL_CTL _MMIO(0x6d000) #define BXT_DE_PLL_RATIO(x) (x) /* {60,65,100} * 19.2MHz */ diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index 2d35d97d170e..62a623e72fe2 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1621,13 +1621,27 @@ static void intel_ddi_clk_select(struct intel_encoder *encoder, { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); enum port port = intel_ddi_get_encoder_port(encoder); + uint32_t val; if (WARN_ON(!pll)) return; - if (IS_GEN9_BC(dev_priv)) { - uint32_t val; + if (IS_CANNONLAKE(dev_priv)) { + /* Configure DPCLKA_CFGCR0 to map the DPLL to the DDI. */ + val = I915_READ(DPCLKA_CFGCR0); + val |= DPCLKA_CFGCR0_DDI_CLK_SEL(pll->id, port); + I915_WRITE(DPCLKA_CFGCR0, val); + /* + * Configure DPCLKA_CFGCR0 to turn on the clock for the DDI. + * This step and the step before must be done with separate + * register writes. + */ + val = I915_READ(DPCLKA_CFGCR0); + val &= ~(DPCLKA_CFGCR0_DDI_CLK_OFF(port) | + DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port)); + I915_WRITE(DPCLKA_CFGCR0, val); + } else if (IS_GEN9_BC(dev_priv)) { /* DDI -> PLL mapping */ val = I915_READ(DPLL_CTRL2); @@ -1767,7 +1781,10 @@ static void intel_ddi_post_disable(struct intel_encoder *intel_encoder, if (dig_port) intel_display_power_put(dev_priv, dig_port->ddi_io_power_domain); - if (IS_GEN9_BC(dev_priv)) + if (IS_CANNONLAKE(dev_priv)) + I915_WRITE(DPCLKA_CFGCR0, I915_READ(DPCLKA_CFGCR0) | + DPCLKA_CFGCR0_DDI_CLK_OFF(port)); + else if (IS_GEN9_BC(dev_priv)) I915_WRITE(DPLL_CTRL2, (I915_READ(DPLL_CTRL2) | DPLL_CTRL2_DDI_CLK_OFF(port))); else if (INTEL_GEN(dev_priv) < 9) |