| // Copyright 2019 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "usage_pixel_format_cost.h" |
| |
| #include <fuchsia/sysmem/c/fidl.h> |
| #include <lib/image-format/image_format.h> |
| #include <zircon/assert.h> |
| |
| #include <list> |
| #include <map> |
| |
| #include <ddk/platform-defs.h> |
| |
| namespace sysmem_driver { |
| |
| namespace { |
| |
| // The local Platform definition is different than the PID(s) in platform-defs.h |
| // in that this local enum includes values that can be used as catch-all for any |
| // PID in a set of PIDs, typically named with a _GENERIC suffix. |
| // |
| // Membership of a PID in a more _GENERIC category is via the next_platform |
| // field. |
| // |
| // Some values of this enum are 1:1 with specific PID values, while others are |
| // essentially more generic categories (groupings) of PID values. This allows |
| // an entry for a more-specific Platform value to effectively share entries of |
| // a more-generic Platform value. |
| enum Platform { |
| kPlatform_None, |
| kPlatform_Generic, |
| kPlatform_Arm_Mali, |
| kPlatform_Amlogic_Generic, |
| kPlatform_Amlogic_S912, |
| kPlatform_Amlogic_S905D2, |
| kPlatform_Amlogic_T931, |
| }; |
| |
| constexpr uint64_t MakeVidPidKey(uint32_t vid, uint32_t pid) { |
| return (static_cast<uint64_t>(vid) << 32) | pid; |
| } |
| |
| // Map from PID (platform id) to Platform value. |
| const std::map<uint64_t, Platform> kPlatformTranslation = { |
| {MakeVidPidKey(PDEV_VID_AMLOGIC, PDEV_PID_AMLOGIC_S912), kPlatform_Amlogic_S912}, |
| {MakeVidPidKey(PDEV_VID_AMLOGIC, PDEV_PID_AMLOGIC_S905D2), kPlatform_Amlogic_S905D2}, |
| {MakeVidPidKey(PDEV_VID_AMLOGIC, PDEV_PID_AMLOGIC_T931), kPlatform_Amlogic_T931}, |
| }; |
| |
| // A UsagePixelFormatCostEntry with more query usage bits in |
| // required_buffer_usage_bits is considered a closer match. |
| // |
| // If two UsagePixelFormatCostEntry(s) have equal number of corresponding usage |
| // bits in required_buffer_usage_bits, the entry occurring first in the overall |
| // effective list of CostEntry(s) for the PID is preferred. This causes any |
| // later-listed otherwise-equally-close-match to be ignored. |
| struct UsagePixelFormatCostEntry { |
| // The query's pixel_format must match for this entry to be considered. |
| const fuchsia_sysmem_PixelFormat pixel_format; |
| // A query's usage bits must contain all these usage bits for this entry to |
| // be considered. |
| const fuchsia_sysmem_BufferUsage required_buffer_usage_bits; |
| // First the entry that's the best match for the GetCost() query is |
| // determined. If this entry is selected as the best match for the query, |
| // this is the cost returned by GetCost(). |
| const double cost; |
| }; |
| |
| struct PlatformCostsEntry { |
| // platform |
| const Platform platform; |
| // The next_platform can be kPlatform_None in which case the effective |
| // overall list is terminated, or next_pid can chain into another Platform |
| // enum value which will be considered part of this platform's list. In |
| // this way, more specific Platform values can chain into less-specific |
| // platform values. |
| const Platform next_platform; |
| |
| const std::list<const UsagePixelFormatCostEntry> costs; |
| }; |
| |
| const std::list<const UsagePixelFormatCostEntry> kArm_Mali_Cost_Entries = { |
| // AFBC always preferred when supported. |
| { |
| // .pixel_format |
| { |
| // .type |
| fuchsia_sysmem_PixelFormatType_BGRA32, |
| // .has_format_modifier |
| true, |
| // .format_modifier.value |
| {fuchsia_sysmem_FORMAT_MODIFIER_ARM_AFBC_16x16}, |
| }, |
| // .required_buffer_usage_bits |
| { |
| // .none |
| 0, |
| // .cpu |
| 0, |
| // .vulkan |
| 0, |
| // .display |
| 0, |
| // .video |
| 0, |
| }, |
| // .cost |
| 1000.0L, |
| }, |
| { |
| // .pixel_format |
| { |
| // .type |
| fuchsia_sysmem_PixelFormatType_R8G8B8A8, |
| // .has_format_modifier |
| true, |
| // .format_modifier.value |
| {fuchsia_sysmem_FORMAT_MODIFIER_ARM_AFBC_16x16}, |
| }, |
| // .required_buffer_usage_bits |
| { |
| // .none |
| 0, |
| // .cpu |
| 0, |
| // .vulkan |
| 0, |
| // .display |
| 0, |
| // .video |
| 0, |
| }, |
| // .cost |
| 1000.0L, |
| }, |
| { |
| // .pixel_format |
| { |
| // .type |
| fuchsia_sysmem_PixelFormatType_BGRA32, |
| // .has_format_modifier |
| true, |
| // .format_modifier.value |
| {fuchsia_sysmem_FORMAT_MODIFIER_ARM_AFBC_32x8}, |
| }, |
| // .required_buffer_usage_bits |
| { |
| // .none |
| 0, |
| // .cpu |
| 0, |
| // .vulkan |
| 0, |
| // .display |
| 0, |
| // .video |
| 0, |
| }, |
| // .cost |
| 1000.0L, |
| }, |
| { |
| // .pixel_format |
| { |
| // .type |
| fuchsia_sysmem_PixelFormatType_R8G8B8A8, |
| // .has_format_modifier |
| true, |
| // .format_modifier.value |
| {fuchsia_sysmem_FORMAT_MODIFIER_ARM_AFBC_32x8}, |
| }, |
| // .required_buffer_usage_bits |
| { |
| // .none |
| 0, |
| // .cpu |
| 0, |
| // .vulkan |
| 0, |
| // .display |
| 0, |
| // .video |
| 0, |
| }, |
| // .cost |
| 1000.0L, |
| }, |
| }; |
| |
| const PlatformCostsEntry kArm_Mali_Costs = { |
| .platform = kPlatform_Arm_Mali, |
| .next_platform = kPlatform_Generic, |
| .costs = kArm_Mali_Cost_Entries, |
| }; |
| |
| const std::list<const UsagePixelFormatCostEntry> kAmlogic_Generic_Cost_Entries = { |
| // NV12 weakly preferred for videoUsageHwDecoder. |
| { |
| // .pixel_format |
| { |
| // .type |
| fuchsia_sysmem_PixelFormatType_NV12, |
| // .has_format_modifier |
| false, |
| // .format_modifier.value |
| {fuchsia_sysmem_FORMAT_MODIFIER_NONE}, |
| }, |
| // .required_buffer_usage_bits |
| { |
| // .none |
| 0, |
| // .cpu |
| 0, |
| // .vulkan |
| 0, |
| // .display |
| 0, |
| // .video |
| fuchsia_sysmem_videoUsageHwDecoder, |
| }, |
| // .cost |
| 100.0L, |
| }, |
| }; |
| |
| // These costs are expected to be true on every platform. |
| const std::list<const UsagePixelFormatCostEntry> kGeneric_Cost_Entries = { |
| { |
| // .pixel_format |
| { |
| // .type |
| fuchsia_sysmem_PixelFormatType_BGRA32, |
| // .has_format_modifier |
| true, |
| // .format_modifier.value |
| {fuchsia_sysmem_FORMAT_MODIFIER_INTEL_I915_X_TILED}, |
| }, |
| // .required_buffer_usage_bits |
| { |
| // .none |
| 0, |
| // .cpu |
| 0, |
| // .vulkan |
| 0, |
| // .display |
| 0, |
| // .video |
| 0, |
| }, |
| // .cost |
| 1000.0L, |
| }, |
| { |
| // .pixel_format |
| { |
| // .type |
| fuchsia_sysmem_PixelFormatType_BGRA32, |
| // .has_format_modifier |
| true, |
| // .format_modifier.value |
| {fuchsia_sysmem_FORMAT_MODIFIER_INTEL_I915_YF_TILED}, |
| }, |
| // .required_buffer_usage_bits |
| { |
| // .none |
| 0, |
| // .cpu |
| 0, |
| // .vulkan |
| 0, |
| // .display |
| 0, |
| // .video |
| 0, |
| }, |
| // .cost |
| 1000.0L, |
| }, |
| { |
| // .pixel_format |
| { |
| // .type |
| fuchsia_sysmem_PixelFormatType_BGRA32, |
| // .has_format_modifier |
| true, |
| // .format_modifier.value |
| {fuchsia_sysmem_FORMAT_MODIFIER_INTEL_I915_Y_TILED}, |
| }, |
| // .required_buffer_usage_bits |
| { |
| // .none |
| 0, |
| // .cpu |
| 0, |
| // .vulkan |
| 0, |
| // .display |
| 0, |
| // .video |
| 0, |
| }, |
| // .cost |
| 1000.0L, |
| }, |
| { |
| // .pixel_format |
| { |
| // .type |
| fuchsia_sysmem_PixelFormatType_R8G8B8A8, |
| // .has_format_modifier |
| true, |
| // .format_modifier.value |
| {fuchsia_sysmem_FORMAT_MODIFIER_INTEL_I915_X_TILED}, |
| }, |
| // .required_buffer_usage_bits |
| { |
| // .none |
| 0, |
| // .cpu |
| 0, |
| // .vulkan |
| 0, |
| // .display |
| 0, |
| // .video |
| 0, |
| }, |
| // .cost |
| 1000.0L, |
| }, |
| { |
| // .pixel_format |
| { |
| // .type |
| fuchsia_sysmem_PixelFormatType_R8G8B8A8, |
| // .has_format_modifier |
| true, |
| // .format_modifier.value |
| {fuchsia_sysmem_FORMAT_MODIFIER_INTEL_I915_YF_TILED}, |
| }, |
| // .required_buffer_usage_bits |
| { |
| // .none |
| 0, |
| // .cpu |
| 0, |
| // .vulkan |
| 0, |
| // .display |
| 0, |
| // .video |
| 0, |
| }, |
| // .cost |
| 1000.0L, |
| }, |
| { |
| // .pixel_format |
| { |
| // .type |
| fuchsia_sysmem_PixelFormatType_R8G8B8A8, |
| // .has_format_modifier |
| true, |
| // .format_modifier.value |
| {fuchsia_sysmem_FORMAT_MODIFIER_INTEL_I915_Y_TILED}, |
| }, |
| // .required_buffer_usage_bits |
| { |
| // .none |
| 0, |
| // .cpu |
| 0, |
| // .vulkan |
| 0, |
| // .display |
| 0, |
| // .video |
| 0, |
| }, |
| // .cost |
| 1000.0L, |
| }, |
| }; |
| |
| const PlatformCostsEntry kAmlogic_Generic_Costs = { |
| .platform = kPlatform_Amlogic_Generic, |
| .next_platform = kPlatform_Arm_Mali, |
| .costs = kAmlogic_Generic_Cost_Entries, |
| }; |
| |
| // kAmlogic_S912_Cost_Entries will go here. |
| |
| const PlatformCostsEntry kAmlogic_S912_Costs = { |
| .platform = kPlatform_Amlogic_S912, |
| .next_platform = kPlatform_Amlogic_Generic, |
| .costs = std::list<const UsagePixelFormatCostEntry>(), |
| }; |
| |
| // kAmlogic_S905D2_Cost_Entries will go here. |
| |
| const PlatformCostsEntry kAmlogic_S905D2_Costs = { |
| .platform = kPlatform_Amlogic_S905D2, |
| .next_platform = kPlatform_Amlogic_Generic, |
| .costs = std::list<const UsagePixelFormatCostEntry>(), |
| }; |
| |
| // kAmlogic_T931_Cost_Entries will go here. |
| |
| const PlatformCostsEntry kAmlogic_T931_Costs = { |
| .platform = kPlatform_Amlogic_T931, |
| .next_platform = kPlatform_Amlogic_Generic, |
| .costs = std::list<const UsagePixelFormatCostEntry>(), |
| }; |
| |
| const PlatformCostsEntry kGeneric_Costs = { |
| .platform = kPlatform_Generic, |
| .next_platform = kPlatform_None, |
| .costs = kGeneric_Cost_Entries, |
| }; |
| |
| const std::map<Platform, const PlatformCostsEntry*> kPlatformCosts = { |
| {kPlatform_Generic, &kGeneric_Costs}, |
| {kPlatform_Arm_Mali, &kArm_Mali_Costs}, |
| {kPlatform_Amlogic_Generic, &kAmlogic_Generic_Costs}, |
| {kPlatform_Amlogic_S912, &kAmlogic_S912_Costs}, |
| {kPlatform_Amlogic_S905D2, &kAmlogic_S905D2_Costs}, |
| {kPlatform_Amlogic_T931, &kAmlogic_T931_Costs}, |
| }; |
| |
| const double kDefaultCost = std::numeric_limits<double>::max(); |
| |
| Platform FindPlatform(uint32_t pdev_device_info_vid, uint32_t pdev_device_info_pid) { |
| auto iter = kPlatformTranslation.find(MakeVidPidKey(pdev_device_info_vid, pdev_device_info_pid)); |
| if (iter == kPlatformTranslation.end()) { |
| return kPlatform_Generic; |
| } |
| return iter->second; |
| } |
| |
| const PlatformCostsEntry* FindPlatformCosts(Platform platform) { |
| if (platform == kPlatform_None) { |
| return nullptr; |
| } |
| auto iter = kPlatformCosts.find(platform); |
| if (iter == kPlatformCosts.end()) { |
| return nullptr; |
| } |
| return iter->second; |
| } |
| |
| // |a| to check |
| // |r| required bits |
| bool HasAllRequiredBits(uint32_t a, uint32_t r) { return (r & a) == r; } |
| |
| // |a| to check |
| // |r| required bits |
| bool HasAllRequiredUsageBits(const fuchsia_sysmem_BufferUsage& a, |
| const fuchsia_sysmem_BufferUsage& r) { |
| return HasAllRequiredBits(a.cpu, r.cpu) && HasAllRequiredBits(a.vulkan, r.vulkan) && |
| HasAllRequiredBits(a.display, r.display) && HasAllRequiredBits(a.video, r.video); |
| } |
| |
| uint32_t SharedBitsCount(uint32_t a, uint32_t b) { |
| uint32_t set_in_both = a & b; |
| |
| // TODO(dustingreen): Consider using popcount intrinsic (or equivalent). |
| uint32_t count = 0; |
| for (uint32_t i = 0; i < sizeof(uint32_t) * 8; ++i) { |
| if (set_in_both & (1 << i)) { |
| ++count; |
| } |
| } |
| |
| return count; |
| } |
| |
| uint32_t SharedUsageBitsCount(const fuchsia_sysmem_BufferUsage& a, |
| const fuchsia_sysmem_BufferUsage& b) { |
| return SharedBitsCount(a.cpu, b.cpu) + SharedBitsCount(a.vulkan, b.vulkan) + |
| SharedBitsCount(a.display, b.display) + SharedBitsCount(a.video, b.video); |
| } |
| |
| // This comparison has nothing to do with the cost of a or cost of b. This is |
| // only about finding the best-match UsagePixelFormatCostEntry for the given |
| // query. |
| // |
| // |constraints| the query's constraints |
| // |
| // |image_format_constraints_index| the query's image_format_constraints_index |
| // |
| // |a| the new UsagePixelFormatCostEntry to consider |
| // |
| // |b| the existing UsagePixelFormatCostEntry that a is being compared against |
| bool IsBetterMatch(const fuchsia_sysmem_BufferCollectionConstraints* constraints, |
| uint32_t image_format_constraints_index, const UsagePixelFormatCostEntry* a, |
| const UsagePixelFormatCostEntry* b) { |
| ZX_DEBUG_ASSERT(constraints); |
| ZX_DEBUG_ASSERT(a); |
| ZX_DEBUG_ASSERT(image_format_constraints_index < constraints->image_format_constraints_count); |
| // We intentionally allow b to be nullptr. |
| |
| if (!ImageFormatIsPixelFormatEqual( |
| a->pixel_format, |
| constraints->image_format_constraints[image_format_constraints_index].pixel_format)) |
| return false; |
| |
| const fuchsia_sysmem_BufferUsage& usage = constraints->usage; |
| if (!HasAllRequiredUsageBits(usage, a->required_buffer_usage_bits)) { |
| return false; |
| } |
| ZX_DEBUG_ASSERT(HasAllRequiredUsageBits(usage, a->required_buffer_usage_bits)); |
| // We intentionally allow b to be nullptr. |
| if (b == nullptr) { |
| return true; |
| } |
| ZX_DEBUG_ASSERT(HasAllRequiredUsageBits(usage, b->required_buffer_usage_bits)); |
| uint32_t a_shared_bits = SharedUsageBitsCount(usage, a->required_buffer_usage_bits); |
| uint32_t b_shared_bits = SharedUsageBitsCount(usage, b->required_buffer_usage_bits); |
| return a_shared_bits > b_shared_bits; |
| } |
| |
| double GetCostInternal(const fuchsia_sysmem_BufferCollectionConstraints* constraints, |
| uint32_t image_format_constraints_index, Platform platform) { |
| const PlatformCostsEntry* platform_costs = FindPlatformCosts(platform); |
| if (!platform_costs) { |
| return kDefaultCost; |
| } |
| const UsagePixelFormatCostEntry* best_match = nullptr; |
| while (platform_costs) { |
| for (const UsagePixelFormatCostEntry& cost : platform_costs->costs) { |
| if (IsBetterMatch(constraints, image_format_constraints_index, &cost, best_match)) { |
| best_match = &cost; |
| } |
| } |
| platform_costs = FindPlatformCosts(platform_costs->next_platform); |
| } |
| if (!best_match) { |
| return kDefaultCost; |
| } |
| ZX_DEBUG_ASSERT(best_match); |
| return best_match->cost; |
| } |
| |
| double GetCost(uint32_t pdev_device_info_vid, uint32_t pdev_device_info_pid, |
| const fuchsia_sysmem_BufferCollectionConstraints* constraints, |
| uint32_t image_format_constraints_index) { |
| Platform platform = FindPlatform(pdev_device_info_vid, pdev_device_info_pid); |
| if (platform == kPlatform_None) { |
| return kDefaultCost; |
| } |
| return GetCostInternal(constraints, image_format_constraints_index, platform); |
| } |
| |
| } // namespace |
| |
| int32_t UsagePixelFormatCost::Compare(uint32_t pdev_device_info_vid, uint32_t pdev_device_info_pid, |
| const fuchsia_sysmem_BufferCollectionConstraints* constraints, |
| uint32_t image_format_constraints_index_a, |
| uint32_t image_format_constraints_index_b) { |
| double cost_a = GetCost(pdev_device_info_vid, pdev_device_info_pid, constraints, |
| image_format_constraints_index_a); |
| double cost_b = GetCost(pdev_device_info_vid, pdev_device_info_pid, constraints, |
| image_format_constraints_index_b); |
| |
| if (cost_a < cost_b) { |
| return -1; |
| } else if (cost_a > cost_b) { |
| return 1; |
| } else { |
| return 0; |
| } |
| } |
| |
| } // namespace sysmem_driver |
