diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ddi.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ddi.c | 119 |
1 files changed, 118 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index d3b3252a8742..4b4fd1f8110b 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1103,6 +1103,62 @@ static int skl_calc_wrpll_link(struct drm_i915_private *dev_priv, return dco_freq / (p0 * p1 * p2 * 5); } +static int cnl_calc_wrpll_link(struct drm_i915_private *dev_priv, + uint32_t pll_id) +{ + uint32_t cfgcr0, cfgcr1; + uint32_t p0, p1, p2, dco_freq, ref_clock; + + cfgcr0 = I915_READ(CNL_DPLL_CFGCR0(pll_id)); + cfgcr1 = I915_READ(CNL_DPLL_CFGCR1(pll_id)); + + p0 = cfgcr1 & DPLL_CFGCR1_PDIV_MASK; + p2 = cfgcr1 & DPLL_CFGCR1_KDIV_MASK; + + if (cfgcr1 & DPLL_CFGCR1_QDIV_MODE(1)) + p1 = (cfgcr1 & DPLL_CFGCR1_QDIV_RATIO_MASK) >> + DPLL_CFGCR1_QDIV_RATIO_SHIFT; + else + p1 = 1; + + + switch (p0) { + case DPLL_CFGCR1_PDIV_2: + p0 = 2; + break; + case DPLL_CFGCR1_PDIV_3: + p0 = 3; + break; + case DPLL_CFGCR1_PDIV_5: + p0 = 5; + break; + case DPLL_CFGCR1_PDIV_7: + p0 = 7; + break; + } + + switch (p2) { + case DPLL_CFGCR1_KDIV_1: + p2 = 1; + break; + case DPLL_CFGCR1_KDIV_2: + p2 = 2; + break; + case DPLL_CFGCR1_KDIV_4: + p2 = 4; + break; + } + + ref_clock = dev_priv->cdclk.hw.ref; + + dco_freq = (cfgcr0 & DPLL_CFGCR0_DCO_INTEGER_MASK) * ref_clock; + + dco_freq += (((cfgcr0 & DPLL_CFGCR0_DCO_FRACTION_MASK) >> + DPLL_CFGCR0_DCO_FRAC_SHIFT) * ref_clock) / 0x8000; + + return dco_freq / (p0 * p1 * p2 * 5); +} + static void ddi_dotclock_get(struct intel_crtc_state *pipe_config) { int dotclock; @@ -1118,12 +1174,68 @@ static void ddi_dotclock_get(struct intel_crtc_state *pipe_config) else dotclock = pipe_config->port_clock; + if (pipe_config->ycbcr420) + dotclock *= 2; + if (pipe_config->pixel_multiplier) dotclock /= pipe_config->pixel_multiplier; pipe_config->base.adjusted_mode.crtc_clock = dotclock; } +static void cnl_ddi_clock_get(struct intel_encoder *encoder, + struct intel_crtc_state *pipe_config) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + int link_clock = 0; + uint32_t cfgcr0, pll_id; + + pll_id = intel_get_shared_dpll_id(dev_priv, pipe_config->shared_dpll); + + cfgcr0 = I915_READ(CNL_DPLL_CFGCR0(pll_id)); + + if (cfgcr0 & DPLL_CFGCR0_HDMI_MODE) { + link_clock = cnl_calc_wrpll_link(dev_priv, pll_id); + } else { + link_clock = cfgcr0 & DPLL_CFGCR0_LINK_RATE_MASK; + + switch (link_clock) { + case DPLL_CFGCR0_LINK_RATE_810: + link_clock = 81000; + break; + case DPLL_CFGCR0_LINK_RATE_1080: + link_clock = 108000; + break; + case DPLL_CFGCR0_LINK_RATE_1350: + link_clock = 135000; + break; + case DPLL_CFGCR0_LINK_RATE_1620: + link_clock = 162000; + break; + case DPLL_CFGCR0_LINK_RATE_2160: + link_clock = 216000; + break; + case DPLL_CFGCR0_LINK_RATE_2700: + link_clock = 270000; + break; + case DPLL_CFGCR0_LINK_RATE_3240: + link_clock = 324000; + break; + case DPLL_CFGCR0_LINK_RATE_4050: + link_clock = 405000; + break; + default: + WARN(1, "Unsupported link rate\n"); + break; + } + link_clock *= 2; + } + + pipe_config->port_clock = link_clock; + + ddi_dotclock_get(pipe_config); +} + static void skl_ddi_clock_get(struct intel_encoder *encoder, struct intel_crtc_state *pipe_config) { @@ -1267,6 +1379,8 @@ void intel_ddi_clock_get(struct intel_encoder *encoder, skl_ddi_clock_get(encoder, pipe_config); else if (IS_GEN9_LP(dev_priv)) bxt_ddi_clock_get(encoder, pipe_config); + else if (IS_CANNONLAKE(dev_priv)) + cnl_ddi_clock_get(encoder, pipe_config); } void intel_ddi_set_pipe_settings(const struct intel_crtc_state *crtc_state) @@ -1868,9 +1982,12 @@ static void cnl_ddi_vswing_sequence(struct intel_encoder *encoder, u32 level) if ((intel_dp) && (type == INTEL_OUTPUT_EDP || type == INTEL_OUTPUT_DP)) { width = intel_dp->lane_count; rate = intel_dp->link_rate; - } else { + } else if (type == INTEL_OUTPUT_HDMI) { width = 4; /* Rate is always < than 6GHz for HDMI */ + } else { + MISSING_CASE(type); + return; } /* |