| // Copyright 2023 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 "src/graphics/display/lib/edid/timings.h" |
| |
| #include <lib/stdcompat/span.h> |
| |
| #include <gtest/gtest.h> |
| |
| #include "src/graphics/display/lib/api-types-cpp/display-timing.h" |
| |
| namespace edid { |
| |
| namespace { |
| |
| TEST(EdidTimingParams, Progressive) { |
| constexpr display::DisplayTiming kExpected = { |
| .horizontal_active_px = 0x0f'0f, |
| .horizontal_front_porch_px = 0x0a'0a, |
| .horizontal_sync_width_px = 0x01'01, |
| .horizontal_back_porch_px = 0x02'02, |
| .vertical_active_lines = 0x0b'0b, |
| .vertical_front_porch_lines = 0x03'03, |
| .vertical_sync_width_lines = 0x04'04, |
| .vertical_back_porch_lines = 0x05'05, |
| .pixel_clock_frequency_khz = 0x1f'1f'1f, |
| .fields_per_frame = display::FieldsPerFrame::kProgressive, |
| .hsync_polarity = display::SyncPolarity::kPositive, |
| .vsync_polarity = display::SyncPolarity::kPositive, |
| .vblank_alternates = false, |
| .pixel_repetition = 0, |
| }; |
| constexpr timing_params_t kEdidTimingParams = { |
| .pixel_freq_khz = 0x1f'1f'1f, |
| .horizontal_addressable = 0x0f'0f, |
| .horizontal_front_porch = 0x0a'0a, |
| .horizontal_sync_pulse = 0x01'01, |
| .horizontal_blanking = 0x0d'0d, |
| .vertical_addressable = 0x0b'0b, |
| .vertical_front_porch = 0x03'03, |
| .vertical_sync_pulse = 0x04'04, |
| .vertical_blanking = 0x0c'0c, |
| .flags = timing_params_t::kPositiveHsync | timing_params_t::kPositiveVsync, |
| // Calculated from the values above: |
| // Htotal = Hactive + Hblank = 0x1c'1c, |
| // Vtotal = Vactive + Vblank = 0x17'17, |
| // Field refresh rate = Pixel Freq (Hz) / (Htotal * Vtotal) = 47.9501 Hz |
| .vertical_refresh_e2 = 4795, |
| }; |
| |
| const display::DisplayTiming display_timing = ToDisplayTiming(kEdidTimingParams); |
| EXPECT_EQ(kExpected, display_timing); |
| |
| const int vertical_refresh_rate_centihertz = |
| (display_timing.vertical_field_refresh_rate_millihertz() + 5) / 10; |
| EXPECT_EQ(vertical_refresh_rate_centihertz, |
| static_cast<int>(kEdidTimingParams.vertical_refresh_e2)); |
| } |
| |
| TEST(EdidTimingParams, Interlaced) { |
| constexpr display::DisplayTiming kExpected = { |
| .horizontal_active_px = 0x0f'0f, |
| .horizontal_front_porch_px = 0x0a'0a, |
| .horizontal_sync_width_px = 0x01'01, |
| .horizontal_back_porch_px = 0x02'02, |
| .vertical_active_lines = 0x0b'0b, |
| .vertical_front_porch_lines = 0x03'03, |
| .vertical_sync_width_lines = 0x04'04, |
| .vertical_back_porch_lines = 0x05'05, |
| .pixel_clock_frequency_khz = 0x1f'1f'1f, |
| .fields_per_frame = display::FieldsPerFrame::kInterlaced, |
| .hsync_polarity = display::SyncPolarity::kPositive, |
| .vsync_polarity = display::SyncPolarity::kPositive, |
| .vblank_alternates = true, |
| .pixel_repetition = 0, |
| }; |
| constexpr timing_params_t kEdidTimingParams = { |
| .pixel_freq_khz = 0x1f'1f'1f, |
| .horizontal_addressable = 0x0f'0f, |
| .horizontal_front_porch = 0x0a'0a, |
| .horizontal_sync_pulse = 0x01'01, |
| .horizontal_blanking = 0x0d'0d, |
| .vertical_addressable = 0x0b'0b, |
| .vertical_front_porch = 0x03'03, |
| .vertical_sync_pulse = 0x04'04, |
| .vertical_blanking = 0x0c'0c, |
| .flags = timing_params_t::kInterlaced | timing_params_t::kPositiveHsync | |
| timing_params_t::kPositiveVsync | timing_params_t::kAlternatingVblank, |
| // Calculated from the values above: |
| // Htotal = Hactive + Hblank = 0x1c'1c, |
| // Vtotal = Vactive + Vblank * 2 + 1 = 0x23'24 |
| // Field refresh rate = Pixel Freq (Hz) / (Htotal * Vtotal) = 63.0131 Hz |
| .vertical_refresh_e2 = 63'01, |
| }; |
| |
| const display::DisplayTiming display_timing = ToDisplayTiming(kEdidTimingParams); |
| EXPECT_EQ(kExpected, display_timing); |
| |
| const int vertical_refresh_rate_centihertz = |
| (display_timing.vertical_field_refresh_rate_millihertz() + 5) / 10; |
| EXPECT_EQ(vertical_refresh_rate_centihertz, |
| static_cast<int>(kEdidTimingParams.vertical_refresh_e2)); |
| } |
| |
| TEST(EdidTimingParams, PolarityMapping) { |
| // Verify Hsync / Vsync polarities are correctly mapped. |
| { |
| constexpr display::DisplayTiming kExpected = { |
| .horizontal_active_px = 0x0f'0f, |
| .horizontal_front_porch_px = 0x0a'0a, |
| .horizontal_sync_width_px = 0x01'01, |
| .horizontal_back_porch_px = 0x02'02, |
| .vertical_active_lines = 0x0b'0b, |
| .vertical_front_porch_lines = 0x03'03, |
| .vertical_sync_width_lines = 0x04'04, |
| .vertical_back_porch_lines = 0x05'05, |
| .pixel_clock_frequency_khz = 0x1f'1f'1f, |
| .fields_per_frame = display::FieldsPerFrame::kInterlaced, |
| .hsync_polarity = display::SyncPolarity::kPositive, |
| .vsync_polarity = display::SyncPolarity::kNegative, |
| .vblank_alternates = true, |
| .pixel_repetition = 0, |
| }; |
| constexpr timing_params_t kEdidTimingParams = { |
| .pixel_freq_khz = 0x1f'1f'1f, |
| .horizontal_addressable = 0x0f'0f, |
| .horizontal_front_porch = 0x0a'0a, |
| .horizontal_sync_pulse = 0x01'01, |
| .horizontal_blanking = 0x0d'0d, |
| .vertical_addressable = 0x0b'0b, |
| .vertical_front_porch = 0x03'03, |
| .vertical_sync_pulse = 0x04'04, |
| .vertical_blanking = 0x0c'0c, |
| .flags = timing_params_t::kInterlaced | timing_params_t::kPositiveHsync | |
| timing_params_t::kAlternatingVblank, |
| // Calculated from the values above: |
| // Htotal = Hactive + Hblank = 0x1c'1c, |
| // Vtotal = Vactive + Vblank * 2 + 1 = 0x23'24 |
| // Field refresh rate = Pixel Freq (Hz) / (Htotal * Vtotal) = 63.0131 Hz |
| .vertical_refresh_e2 = 63'01, |
| }; |
| |
| const display::DisplayTiming display_timing = ToDisplayTiming(kEdidTimingParams); |
| EXPECT_EQ(kExpected, display_timing); |
| |
| const int vertical_refresh_rate_centihertz = |
| (display_timing.vertical_field_refresh_rate_millihertz() + 5) / 10; |
| EXPECT_EQ(vertical_refresh_rate_centihertz, |
| static_cast<int>(kEdidTimingParams.vertical_refresh_e2)); |
| } |
| { |
| constexpr display::DisplayTiming kExpected = { |
| .horizontal_active_px = 0x0f'0f, |
| .horizontal_front_porch_px = 0x0a'0a, |
| .horizontal_sync_width_px = 0x01'01, |
| .horizontal_back_porch_px = 0x02'02, |
| .vertical_active_lines = 0x0b'0b, |
| .vertical_front_porch_lines = 0x03'03, |
| .vertical_sync_width_lines = 0x04'04, |
| .vertical_back_porch_lines = 0x05'05, |
| .pixel_clock_frequency_khz = 0x1f'1f'1f, |
| .fields_per_frame = display::FieldsPerFrame::kInterlaced, |
| .hsync_polarity = display::SyncPolarity::kNegative, |
| .vsync_polarity = display::SyncPolarity::kPositive, |
| .vblank_alternates = true, |
| .pixel_repetition = 0, |
| }; |
| constexpr edid::timing_params_t kEdidTimingParams = { |
| .pixel_freq_khz = 0x1f'1f'1f, |
| .horizontal_addressable = 0x0f'0f, |
| .horizontal_front_porch = 0x0a'0a, |
| .horizontal_sync_pulse = 0x01'01, |
| .horizontal_blanking = 0x0d'0d, |
| .vertical_addressable = 0x0b'0b, |
| .vertical_front_porch = 0x03'03, |
| .vertical_sync_pulse = 0x04'04, |
| .vertical_blanking = 0x0c'0c, |
| .flags = timing_params_t::kInterlaced | timing_params_t::kPositiveVsync | |
| timing_params_t::kAlternatingVblank, |
| // Calculated from the values above: |
| // Htotal = Hactive + Hblank = 0x1c'1c, |
| // Vtotal = Vactive + Vblank * 2 + 1 = 0x23'24 |
| // Field refresh rate = Pixel Freq (Hz) / (Htotal * Vtotal) = 63.0131 Hz |
| .vertical_refresh_e2 = 63'01, |
| }; |
| |
| const display::DisplayTiming display_timing = ToDisplayTiming(kEdidTimingParams); |
| EXPECT_EQ(kExpected, display_timing); |
| |
| const int vertical_refresh_rate_centihertz = |
| (display_timing.vertical_field_refresh_rate_millihertz() + 5) / 10; |
| EXPECT_EQ(vertical_refresh_rate_centihertz, |
| static_cast<int>(kEdidTimingParams.vertical_refresh_e2)); |
| } |
| } |
| |
| } // namespace |
| |
| } // namespace edid |
