diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dram.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dram.c | 82 |
1 files changed, 81 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_dram.c b/drivers/gpu/drm/i915/intel_dram.c index 694fbd8c9cd4..4d5ab206eacb 100644 --- a/drivers/gpu/drm/i915/intel_dram.c +++ b/drivers/gpu/drm/i915/intel_dram.c @@ -5,6 +5,7 @@ #include "i915_drv.h" #include "intel_dram.h" +#include "intel_sideband.h" struct dram_dimm_info { u16 size; @@ -408,6 +409,81 @@ static int bxt_get_dram_info(struct drm_i915_private *i915) return 0; } +static int icl_pcode_read_mem_global_info(struct drm_i915_private *dev_priv) +{ + struct dram_info *dram_info = &dev_priv->dram_info; + u32 val = 0; + int ret; + + ret = sandybridge_pcode_read(dev_priv, + ICL_PCODE_MEM_SUBSYSYSTEM_INFO | + ICL_PCODE_MEM_SS_READ_GLOBAL_INFO, + &val, NULL); + if (ret) + return ret; + + if (IS_GEN(dev_priv, 12)) { + switch (val & 0xf) { + case 0: + dram_info->type = INTEL_DRAM_DDR4; + break; + case 3: + dram_info->type = INTEL_DRAM_LPDDR4; + break; + case 4: + dram_info->type = INTEL_DRAM_DDR3; + break; + case 5: + dram_info->type = INTEL_DRAM_LPDDR3; + break; + default: + MISSING_CASE(val & 0xf); + return -1; + } + } else { + switch (val & 0xf) { + case 0: + dram_info->type = INTEL_DRAM_DDR4; + break; + case 1: + dram_info->type = INTEL_DRAM_DDR3; + break; + case 2: + dram_info->type = INTEL_DRAM_LPDDR3; + break; + case 3: + dram_info->type = INTEL_DRAM_LPDDR4; + break; + default: + MISSING_CASE(val & 0xf); + return -1; + } + } + + dram_info->num_channels = (val & 0xf0) >> 4; + dram_info->num_qgv_points = (val & 0xf00) >> 8; + + return 0; +} + +static int gen11_get_dram_info(struct drm_i915_private *i915) +{ + int ret = skl_get_dram_info(i915); + + if (ret) + return ret; + + return icl_pcode_read_mem_global_info(i915); +} + +static int gen12_get_dram_info(struct drm_i915_private *i915) +{ + /* Always needed for GEN12+ */ + i915->dram_info.is_16gb_dimm = true; + + return icl_pcode_read_mem_global_info(i915); +} + void intel_dram_detect(struct drm_i915_private *i915) { struct dram_info *dram_info = &i915->dram_info; @@ -423,7 +499,11 @@ void intel_dram_detect(struct drm_i915_private *i915) if (INTEL_GEN(i915) < 9 || !HAS_DISPLAY(i915)) return; - if (IS_GEN9_LP(i915)) + if (INTEL_GEN(i915) >= 12) + ret = gen12_get_dram_info(i915); + else if (INTEL_GEN(i915) >= 11) + ret = gen11_get_dram_info(i915); + else if (IS_GEN9_LP(i915)) ret = bxt_get_dram_info(i915); else ret = skl_get_dram_info(i915); |