diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_device_info.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_device_info.c | 121 |
1 files changed, 110 insertions, 11 deletions
diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c index 875d428ea75f..02f8bf101ccd 100644 --- a/drivers/gpu/drm/i915/intel_device_info.c +++ b/drivers/gpu/drm/i915/intel_device_info.c @@ -235,16 +235,6 @@ static void gen9_sseu_info_init(struct drm_i915_private *dev_priv) #define IS_SS_DISABLED(ss) (!(sseu->subslice_mask & BIT(ss))) info->has_pooled_eu = hweight8(sseu->subslice_mask) == 3; - /* - * There is a HW issue in 2x6 fused down parts that requires - * Pooled EU to be enabled as a WA. The pool configuration - * changes depending upon which subslice is fused down. This - * doesn't affect if the device has all 3 subslices enabled. - */ - /* WaEnablePooledEuFor2x6:bxt */ - info->has_pooled_eu |= (hweight8(sseu->subslice_mask) == 2 && - IS_BXT_REVID(dev_priv, 0, BXT_REVID_B_LAST)); - sseu->min_eu_in_pool = 0; if (info->has_pooled_eu) { if (IS_SS_DISABLED(2) || IS_SS_DISABLED(0)) @@ -329,6 +319,107 @@ static void broadwell_sseu_info_init(struct drm_i915_private *dev_priv) sseu->has_eu_pg = 0; } +static u32 read_reference_ts_freq(struct drm_i915_private *dev_priv) +{ + u32 ts_override = I915_READ(GEN9_TIMESTAMP_OVERRIDE); + u32 base_freq, frac_freq; + + base_freq = ((ts_override & GEN9_TIMESTAMP_OVERRIDE_US_COUNTER_DIVIDER_MASK) >> + GEN9_TIMESTAMP_OVERRIDE_US_COUNTER_DIVIDER_SHIFT) + 1; + base_freq *= 1000; + + frac_freq = ((ts_override & + GEN9_TIMESTAMP_OVERRIDE_US_COUNTER_DENOMINATOR_MASK) >> + GEN9_TIMESTAMP_OVERRIDE_US_COUNTER_DENOMINATOR_SHIFT); + frac_freq = 1000 / (frac_freq + 1); + + return base_freq + frac_freq; +} + +static u32 read_timestamp_frequency(struct drm_i915_private *dev_priv) +{ + u32 f12_5_mhz = 12500; + u32 f19_2_mhz = 19200; + u32 f24_mhz = 24000; + + if (INTEL_GEN(dev_priv) <= 4) { + /* PRMs say: + * + * "The value in this register increments once every 16 + * hclks." (through the “Clocking Configuration” + * (“CLKCFG”) MCHBAR register) + */ + return dev_priv->rawclk_freq / 16; + } else if (INTEL_GEN(dev_priv) <= 8) { + /* PRMs say: + * + * "The PCU TSC counts 10ns increments; this timestamp + * reflects bits 38:3 of the TSC (i.e. 80ns granularity, + * rolling over every 1.5 hours). + */ + return f12_5_mhz; + } else if (INTEL_GEN(dev_priv) <= 9) { + u32 ctc_reg = I915_READ(CTC_MODE); + u32 freq = 0; + + if ((ctc_reg & CTC_SOURCE_PARAMETER_MASK) == CTC_SOURCE_DIVIDE_LOGIC) { + freq = read_reference_ts_freq(dev_priv); + } else { + freq = IS_GEN9_LP(dev_priv) ? f19_2_mhz : f24_mhz; + + /* Now figure out how the command stream's timestamp + * register increments from this frequency (it might + * increment only every few clock cycle). + */ + freq >>= 3 - ((ctc_reg & CTC_SHIFT_PARAMETER_MASK) >> + CTC_SHIFT_PARAMETER_SHIFT); + } + + return freq; + } else if (INTEL_GEN(dev_priv) <= 10) { + u32 ctc_reg = I915_READ(CTC_MODE); + u32 freq = 0; + u32 rpm_config_reg = 0; + + /* First figure out the reference frequency. There are 2 ways + * we can compute the frequency, either through the + * TIMESTAMP_OVERRIDE register or through RPM_CONFIG. CTC_MODE + * tells us which one we should use. + */ + if ((ctc_reg & CTC_SOURCE_PARAMETER_MASK) == CTC_SOURCE_DIVIDE_LOGIC) { + freq = read_reference_ts_freq(dev_priv); + } else { + u32 crystal_clock; + + rpm_config_reg = I915_READ(RPM_CONFIG0); + crystal_clock = (rpm_config_reg & + GEN9_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_MASK) >> + GEN9_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_SHIFT; + switch (crystal_clock) { + case GEN9_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_19_2_MHZ: + freq = f19_2_mhz; + break; + case GEN9_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_24_MHZ: + freq = f24_mhz; + break; + } + } + + /* Now figure out how the command stream's timestamp register + * increments from this frequency (it might increment only + * every few clock cycle). + */ + freq >>= 3 - ((rpm_config_reg & + GEN10_RPM_CONFIG0_CTC_SHIFT_PARAMETER_MASK) >> + GEN10_RPM_CONFIG0_CTC_SHIFT_PARAMETER_SHIFT); + + return freq; + } + + DRM_ERROR("Unknown gen, unable to compute command stream timestamp frequency\n"); + return 0; +} + /* * Determine various intel_device_info fields at runtime. * @@ -347,7 +438,10 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv) struct intel_device_info *info = mkwrite_device_info(dev_priv); enum pipe pipe; - if (INTEL_GEN(dev_priv) >= 9) { + if (INTEL_GEN(dev_priv) >= 10) { + for_each_pipe(dev_priv, pipe) + info->num_scalers[pipe] = 2; + } else if (INTEL_GEN(dev_priv) == 9) { info->num_scalers[PIPE_A] = 2; info->num_scalers[PIPE_B] = 2; info->num_scalers[PIPE_C] = 1; @@ -447,6 +541,9 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv) else if (INTEL_GEN(dev_priv) >= 10) gen10_sseu_info_init(dev_priv); + /* Initialize command stream timestamp frequency */ + info->cs_timestamp_frequency_khz = read_timestamp_frequency(dev_priv); + DRM_DEBUG_DRIVER("slice mask: %04x\n", info->sseu.slice_mask); DRM_DEBUG_DRIVER("slice total: %u\n", hweight8(info->sseu.slice_mask)); DRM_DEBUG_DRIVER("subslice total: %u\n", @@ -462,4 +559,6 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv) info->sseu.has_subslice_pg ? "y" : "n"); DRM_DEBUG_DRIVER("has EU power gating: %s\n", info->sseu.has_eu_pg ? "y" : "n"); + DRM_DEBUG_DRIVER("CS timestamp frequency: %u kHz\n", + info->cs_timestamp_frequency_khz); } |