2 * Copyright 2015 Advanced Micro Devices, Inc.
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5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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26 #include <drm/drm_crtc.h>
29 #include "amdgpu_dm.h"
32 enum amdgpu_dm_pipe_crc_source {
33 AMDGPU_DM_PIPE_CRC_SOURCE_NONE = 0,
34 AMDGPU_DM_PIPE_CRC_SOURCE_AUTO,
35 AMDGPU_DM_PIPE_CRC_SOURCE_MAX,
36 AMDGPU_DM_PIPE_CRC_SOURCE_INVALID = -1,
39 static enum amdgpu_dm_pipe_crc_source dm_parse_crc_source(const char *source)
41 if (!source || !strcmp(source, "none"))
42 return AMDGPU_DM_PIPE_CRC_SOURCE_NONE;
43 if (!strcmp(source, "auto"))
44 return AMDGPU_DM_PIPE_CRC_SOURCE_AUTO;
46 return AMDGPU_DM_PIPE_CRC_SOURCE_INVALID;
50 amdgpu_dm_crtc_verify_crc_source(struct drm_crtc *crtc, const char *src_name,
53 enum amdgpu_dm_pipe_crc_source source = dm_parse_crc_source(src_name);
56 DRM_DEBUG_DRIVER("Unknown CRC source %s for CRTC%d\n",
57 src_name, crtc->index);
65 int amdgpu_dm_crtc_set_crc_source(struct drm_crtc *crtc, const char *src_name)
67 struct dm_crtc_state *crtc_state = to_dm_crtc_state(crtc->state);
68 struct dc_stream_state *stream_state = crtc_state->stream;
70 enum amdgpu_dm_pipe_crc_source source = dm_parse_crc_source(src_name);
73 DRM_DEBUG_DRIVER("Unknown CRC source %s for CRTC%d\n",
74 src_name, crtc->index);
78 /* When enabling CRC, we should also disable dithering. */
79 if (source == AMDGPU_DM_PIPE_CRC_SOURCE_AUTO) {
80 if (dc_stream_configure_crc(stream_state->ctx->dc,
83 crtc_state->crc_enabled = true;
84 dc_stream_set_dither_option(stream_state,
90 if (dc_stream_configure_crc(stream_state->ctx->dc,
93 crtc_state->crc_enabled = false;
94 dc_stream_set_dither_option(stream_state,
95 DITHER_OPTION_DEFAULT);
101 /* Reset crc_skipped on dm state */
102 crtc_state->crc_skip_count = 0;
107 * amdgpu_dm_crtc_handle_crc_irq: Report to DRM the CRC on given CRTC.
108 * @crtc: DRM CRTC object.
110 * This function should be called at the end of a vblank, when the fb has been
111 * fully processed through the pipe.
113 void amdgpu_dm_crtc_handle_crc_irq(struct drm_crtc *crtc)
115 struct dm_crtc_state *crtc_state;
116 struct dc_stream_state *stream_state;
122 crtc_state = to_dm_crtc_state(crtc->state);
123 stream_state = crtc_state->stream;
125 /* Early return if CRC capture is not enabled. */
126 if (!crtc_state->crc_enabled)
130 * Since flipping and crc enablement happen asynchronously, we - more
131 * often than not - will be returning an 'uncooked' crc on first frame.
132 * Probably because hw isn't ready yet. For added security, skip the
133 * first two CRC values.
135 if (crtc_state->crc_skip_count < 2) {
136 crtc_state->crc_skip_count += 1;
140 if (!dc_stream_get_crc(stream_state->ctx->dc, stream_state,
141 &crcs[0], &crcs[1], &crcs[2]))
144 drm_crtc_add_crc_entry(crtc, true,
145 drm_crtc_accurate_vblank_count(crtc), crcs);