diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c')
-rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c new file mode 100644 index 000000000000..52f2c01349e3 --- /dev/null +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c @@ -0,0 +1,126 @@ +/* + * Copyright 2015 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: AMD + * + */ + +#include <drm/drm_crtc.h> + +#include "amdgpu.h" +#include "amdgpu_dm.h" +#include "dc.h" + +enum amdgpu_dm_pipe_crc_source { + AMDGPU_DM_PIPE_CRC_SOURCE_NONE = 0, + AMDGPU_DM_PIPE_CRC_SOURCE_AUTO, + AMDGPU_DM_PIPE_CRC_SOURCE_MAX, + AMDGPU_DM_PIPE_CRC_SOURCE_INVALID = -1, +}; + +static enum amdgpu_dm_pipe_crc_source dm_parse_crc_source(const char *source) +{ + if (!source || !strcmp(source, "none")) + return AMDGPU_DM_PIPE_CRC_SOURCE_NONE; + if (!strcmp(source, "auto")) + return AMDGPU_DM_PIPE_CRC_SOURCE_AUTO; + + return AMDGPU_DM_PIPE_CRC_SOURCE_INVALID; +} + +int amdgpu_dm_crtc_set_crc_source(struct drm_crtc *crtc, const char *src_name, + size_t *values_cnt) +{ + struct dm_crtc_state *crtc_state = to_dm_crtc_state(crtc->state); + struct dc_stream_state *stream_state = crtc_state->stream; + + enum amdgpu_dm_pipe_crc_source source = dm_parse_crc_source(src_name); + + if (source < 0) { + DRM_DEBUG_DRIVER("Unknown CRC source %s for CRTC%d\n", + src_name, crtc->index); + return -EINVAL; + } + + /* When enabling CRC, we should also disable dithering. */ + if (source == AMDGPU_DM_PIPE_CRC_SOURCE_AUTO) { + if (dc_stream_configure_crc(stream_state->ctx->dc, + stream_state, + true, true)) { + crtc_state->crc_enabled = true; + dc_stream_set_dither_option(stream_state, + DITHER_OPTION_TRUN8); + } + else + return -EINVAL; + } else { + if (dc_stream_configure_crc(stream_state->ctx->dc, + stream_state, + false, false)) { + crtc_state->crc_enabled = false; + dc_stream_set_dither_option(stream_state, + DITHER_OPTION_DEFAULT); + } + else + return -EINVAL; + } + + *values_cnt = 3; + /* Reset crc_skipped on dm state */ + crtc_state->crc_skip_count = 0; + return 0; +} + +/** + * amdgpu_dm_crtc_handle_crc_irq: Report to DRM the CRC on given CRTC. + * @crtc: DRM CRTC object. + * + * This function should be called at the end of a vblank, when the fb has been + * fully processed through the pipe. + */ +void amdgpu_dm_crtc_handle_crc_irq(struct drm_crtc *crtc) +{ + struct dm_crtc_state *crtc_state = to_dm_crtc_state(crtc->state); + struct dc_stream_state *stream_state = crtc_state->stream; + uint32_t crcs[3]; + + /* Early return if CRC capture is not enabled. */ + if (!crtc_state->crc_enabled) + return; + + /* + * Since flipping and crc enablement happen asynchronously, we - more + * often than not - will be returning an 'uncooked' crc on first frame. + * Probably because hw isn't ready yet. For added security, skip the + * first two CRC values. + */ + if (crtc_state->crc_skip_count < 2) { + crtc_state->crc_skip_count += 1; + return; + } + + if (!dc_stream_get_crc(stream_state->ctx->dc, stream_state, + &crcs[0], &crcs[1], &crcs[2])) + return; + + drm_crtc_add_crc_entry(crtc, true, + drm_crtc_accurate_vblank_count(crtc), crcs); +} |