diff options
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display_power.c | 54 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 8 |
2 files changed, 62 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c index ce1b64f4dd44..0b3dd2a3b94d 100644 --- a/drivers/gpu/drm/i915/display/intel_display_power.c +++ b/drivers/gpu/drm/i915/display/intel_display_power.c @@ -4781,6 +4781,56 @@ static void cnl_display_core_uninit(struct drm_i915_private *dev_priv) intel_combo_phy_uninit(dev_priv); } +struct buddy_page_mask { + u32 page_mask; + u8 type; + u8 num_channels; +}; + +static const struct buddy_page_mask tgl_buddy_page_masks[] = { + { .num_channels = 1, .type = INTEL_DRAM_LPDDR4, .page_mask = 0xE }, + { .num_channels = 1, .type = INTEL_DRAM_DDR4, .page_mask = 0xF }, + { .num_channels = 2, .type = INTEL_DRAM_LPDDR4, .page_mask = 0x1C }, + { .num_channels = 2, .type = INTEL_DRAM_DDR4, .page_mask = 0x1F }, + {} +}; + +static const struct buddy_page_mask wa_1409767108_buddy_page_masks[] = { + { .num_channels = 1, .type = INTEL_DRAM_LPDDR4, .page_mask = 0x1 }, + { .num_channels = 1, .type = INTEL_DRAM_DDR4, .page_mask = 0x1 }, + { .num_channels = 2, .type = INTEL_DRAM_LPDDR4, .page_mask = 0x3 }, + { .num_channels = 2, .type = INTEL_DRAM_DDR4, .page_mask = 0x3 }, + {} +}; + +static void tgl_bw_buddy_init(struct drm_i915_private *dev_priv) +{ + enum intel_dram_type type = dev_priv->dram_info.type; + u8 num_channels = dev_priv->dram_info.num_channels; + const struct buddy_page_mask *table; + int i; + + if (IS_TGL_REVID(dev_priv, TGL_REVID_A0, TGL_REVID_A0)) + /* Wa_1409767108: tgl */ + table = wa_1409767108_buddy_page_masks; + else + table = tgl_buddy_page_masks; + + for (i = 0; table[i].page_mask != 0; i++) + if (table[i].num_channels == num_channels && + table[i].type == type) + break; + + if (table[i].page_mask == 0) { + DRM_DEBUG_DRIVER("Unknown memory configuration; disabling address buddy logic.\n"); + I915_WRITE(BW_BUDDY1_CTL, BW_BUDDY_DISABLE); + I915_WRITE(BW_BUDDY2_CTL, BW_BUDDY_DISABLE); + } else { + I915_WRITE(BW_BUDDY1_PAGE_MASK, table[i].page_mask); + I915_WRITE(BW_BUDDY2_PAGE_MASK, table[i].page_mask); + } +} + static void icl_display_core_init(struct drm_i915_private *dev_priv, bool resume) { @@ -4813,6 +4863,10 @@ static void icl_display_core_init(struct drm_i915_private *dev_priv, /* 6. Setup MBUS. */ icl_mbus_init(dev_priv); + /* 7. Program arbiter BW_BUDDY registers */ + if (INTEL_GEN(dev_priv) >= 12) + tgl_bw_buddy_init(dev_priv); + if (resume && dev_priv->csr.dmc_payload) intel_csr_load_program(dev_priv); } diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 1a6376a97d48..082190c2dc48 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -7765,6 +7765,14 @@ enum { #define GEN7_MSG_CTL _MMIO(0x45010) #define WAIT_FOR_PCH_RESET_ACK (1 << 1) #define WAIT_FOR_PCH_FLR_ACK (1 << 0) + +#define BW_BUDDY1_CTL _MMIO(0x45140) +#define BW_BUDDY2_CTL _MMIO(0x45150) +#define BW_BUDDY_DISABLE REG_BIT(31) + +#define BW_BUDDY1_PAGE_MASK _MMIO(0x45144) +#define BW_BUDDY2_PAGE_MASK _MMIO(0x45154) + #define HSW_NDE_RSTWRN_OPT _MMIO(0x46408) #define RESET_PCH_HANDSHAKE_ENABLE (1 << 4) |