[Intel-gfx] [PATCH i-g-t 1/7] igt: lib/igt_crc: Split out CRC functionality
Arkadiusz Hiler
arkadiusz.hiler at intel.com
Mon Jul 17 13:50:27 UTC 2017
On Thu, Jul 06, 2017 at 05:14:18PM +0100, Liviu Dudau wrote:
> From: Brian Starkey <brian.starkey at arm.com>
>
> Separate out the CRC code for better compartmentalisation. Should ease
> the addition of more/different CRC sources in the future.
>
> Signed-off-by: Brian Starkey <brian.starkey at arm.com>
> Signed-off-by: Liviu Dudau <liviu.dudau at arm.com>
>
> ---
> lib/Makefile.sources | 2 +
> lib/igt_chamelium.h | 1 +
> lib/igt_crc.c | 563 ++++++++++++++++++++++++++++++++++++++
> lib/igt_crc.h | 125 +++++++++
> lib/igt_debugfs.c | 547 ------------------------------------
> lib/igt_debugfs.h | 81 ------
> tests/chamelium.c | 1 +
> tests/kms_atomic_transition.c | 1 +
> tests/kms_ccs.c | 1 +
> tests/kms_chv_cursor_fail.c | 1 +
> tests/kms_crtc_background_color.c | 1 +
> tests/kms_cursor_crc.c | 1 +
> tests/kms_cursor_legacy.c | 1 +
> tests/kms_draw_crc.c | 1 +
> tests/kms_fbc_crc.c | 1 +
> tests/kms_flip_tiling.c | 1 +
> tests/kms_frontbuffer_tracking.c | 1 +
> tests/kms_mmap_write_crc.c | 1 +
> tests/kms_mmio_vs_cs_flip.c | 1 +
> tests/kms_pipe_color.c | 1 +
> tests/kms_pipe_crc_basic.c | 1 +
> tests/kms_plane.c | 1 +
> tests/kms_plane_lowres.c | 1 +
> tests/kms_plane_multiple.c | 1 +
> tests/kms_plane_scaling.c | 1 +
> tests/kms_pwrite_crc.c | 1 +
> tests/kms_rotation_crc.c | 1 +
> tests/kms_universal_plane.c | 1 +
> tools/intel_display_crc.c | 1 +
> 29 files changed, 714 insertions(+), 628 deletions(-)
> create mode 100644 lib/igt_crc.c
> create mode 100644 lib/igt_crc.h
>
> diff --git a/lib/Makefile.sources b/lib/Makefile.sources
> index 53fdb54c..cfba15c9 100644
> --- a/lib/Makefile.sources
> +++ b/lib/Makefile.sources
> @@ -11,6 +11,8 @@ lib_source_list = \
> igt_debugfs.h \
> igt_aux.c \
> igt_aux.h \
> + igt_crc.c \
> + igt_crc.h \
> igt_edid_template.h \
> igt_gt.c \
> igt_gt.h \
> diff --git a/lib/igt_chamelium.h b/lib/igt_chamelium.h
> index 81322ad2..ea5abc2e 100644
> --- a/lib/igt_chamelium.h
> +++ b/lib/igt_chamelium.h
> @@ -31,6 +31,7 @@
> #endif
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include <stdbool.h>
>
> struct chamelium;
> diff --git a/lib/igt_crc.c b/lib/igt_crc.c
> new file mode 100644
> index 00000000..91a0b5a8
> --- /dev/null
> +++ b/lib/igt_crc.c
> @@ -0,0 +1,563 @@
> +/*
> + * Copyright © 2013 Intel Corporation
> + *
> + * 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 (including the next
> + * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
> + *
> + */
> +#include <dirent.h>
> +#include <errno.h>
> +#include <fcntl.h>
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <string.h>
> +#include <sys/stat.h>
> +#include <sys/types.h>
> +
> +#include "igt_aux.h"
> +#include "igt_crc.h"
> +#include "igt_core.h"
> +#include "igt_debugfs.h"
> +#include "igt_kms.h"
> +
> +/**
> + * igt_assert_crc_equal:
> + * @a: first pipe CRC value
> + * @b: second pipe CRC value
> + *
> + * Compares two CRC values and fails the testcase if they don't match with
> + * igt_fail(). Note that due to CRC collisions CRC based testcase can only
> + * assert that CRCs match, never that they are different. Otherwise there might
> + * be random testcase failures when different screen contents end up with the
> + * same CRC by chance.
> + */
> +void igt_assert_crc_equal(const igt_crc_t *a, const igt_crc_t *b)
> +{
> + int i;
> +
> + for (i = 0; i < a->n_words; i++)
> + igt_assert_eq_u32(a->crc[i], b->crc[i]);
> +}
> +
> +/**
> + * igt_crc_to_string:
> + * @crc: pipe CRC value to print
> + *
> + * This formats @crc into a string buffer which is owned by igt_crc_to_string().
> + * The next call will override the buffer again, which makes this multithreading
> + * unsafe.
> + *
> + * This should only ever be used for diagnostic debug output.
> + */
> +char *igt_crc_to_string(igt_crc_t *crc)
Noticed that the doc is out of sync with how the function actually
works. Sending a patch to fix that.
Other than that LGTM.
--
Cheers,
Arek
> +{
> + int i;
> + char buf[128] = { 0 };
> +
> + for (i = 0; i < crc->n_words; i++)
> + sprintf(buf + strlen(buf), "%08x ", crc->crc[i]);
> +
> + return strdup(buf);
> +}
> +
> +#define MAX_CRC_ENTRIES 10
> +#define MAX_LINE_LEN (10 + 11 * MAX_CRC_ENTRIES + 1)
> +
> +/* (6 fields, 8 chars each, space separated (5) + '\n') */
> +#define LEGACY_LINE_LEN (6 * 8 + 5 + 1)
> +
> +struct _igt_pipe_crc {
> + int fd;
> + int dir;
> + int ctl_fd;
> + int crc_fd;
> + int flags;
> + bool is_legacy;
> +
> + enum pipe pipe;
> + enum intel_pipe_crc_source source;
> +};
> +
> +static const char *pipe_crc_sources[] = {
> + "none",
> + "plane1",
> + "plane2",
> + "pf",
> + "pipe",
> + "TV",
> + "DP-B",
> + "DP-C",
> + "DP-D",
> + "auto"
> +};
> +
> +static const char *pipe_crc_source_name(enum intel_pipe_crc_source source)
> +{
> + return pipe_crc_sources[source];
> +}
> +
> +static bool igt_pipe_crc_do_start(igt_pipe_crc_t *pipe_crc)
> +{
> + char buf[64];
> +
> + /* Stop first just to make sure we don't have lingering state left. */
> + igt_pipe_crc_stop(pipe_crc);
> +
> + if (pipe_crc->is_legacy)
> + sprintf(buf, "pipe %s %s", kmstest_pipe_name(pipe_crc->pipe),
> + pipe_crc_source_name(pipe_crc->source));
> + else
> + sprintf(buf, "%s", pipe_crc_source_name(pipe_crc->source));
> +
> + igt_assert_eq(write(pipe_crc->ctl_fd, buf, strlen(buf)), strlen(buf));
> +
> + if (!pipe_crc->is_legacy) {
> + int err;
> +
> + sprintf(buf, "crtc-%d/crc/data", pipe_crc->pipe);
> + err = 0;
> +
> + pipe_crc->crc_fd = openat(pipe_crc->dir, buf, pipe_crc->flags);
> + if (pipe_crc->crc_fd < 0)
> + err = -errno;
> +
> + if (err == -EINVAL)
> + return false;
> +
> + igt_assert_eq(err, 0);
> + }
> +
> + errno = 0;
> + return true;
> +}
> +
> +static void igt_pipe_crc_pipe_off(int fd, enum pipe pipe)
> +{
> + char buf[32];
> +
> + sprintf(buf, "pipe %s none", kmstest_pipe_name(pipe));
> + igt_assert_eq(write(fd, buf, strlen(buf)), strlen(buf));
> +}
> +
> +static void igt_pipe_crc_reset(int drm_fd)
> +{
> + struct dirent *dirent;
> + const char *cmd = "none";
> + bool done = false;
> + DIR *dir;
> + int fdir;
> + int fd;
> +
> + fdir = igt_debugfs_dir(drm_fd);
> + if (fdir < 0)
> + return;
> +
> + dir = fdopendir(fdir);
> + if (!dir) {
> + close(fdir);
> + return;
> + }
> +
> + while ((dirent = readdir(dir))) {
> + char buf[128];
> +
> + if (strcmp(dirent->d_name, "crtc-") != 0)
> + continue;
> +
> + sprintf(buf, "%s/crc/control", dirent->d_name);
> + fd = openat(fdir, buf, O_WRONLY);
> + if (fd < 0)
> + continue;
> +
> + igt_assert_eq(write(fd, cmd, strlen(cmd)), strlen(cmd));
> + close(fd);
> +
> + done = true;
> + }
> + closedir(dir);
> +
> + if (!done) {
> + fd = openat(fdir, "i915_display_crtc_ctl", O_WRONLY);
> + if (fd != -1) {
> + igt_pipe_crc_pipe_off(fd, PIPE_A);
> + igt_pipe_crc_pipe_off(fd, PIPE_B);
> + igt_pipe_crc_pipe_off(fd, PIPE_C);
> +
> + close(fd);
> + }
> + }
> +
> + close(fdir);
> +}
> +
> +static void pipe_crc_exit_handler(int sig)
> +{
> + struct dirent *dirent;
> + char buf[128];
> + DIR *dir;
> + int fd;
> +
> + dir = opendir("/dev/dri");
> + if (!dir)
> + return;
> +
> + /*
> + * Try to reset CRC capture for all DRM devices, this is only needed
> + * for the legacy CRC ABI and can be completely removed once the
> + * legacy codepaths are removed.
> + */
> + while ((dirent = readdir(dir))) {
> + if (strncmp(dirent->d_name, "card", 4) != 0)
> + continue;
> +
> + sprintf(buf, "/dev/dri/%s", dirent->d_name);
> + fd = open(buf, O_WRONLY);
> +
> + igt_pipe_crc_reset(fd);
> +
> + close(fd);
> + }
> + closedir(dir);
> +}
> +
> +/**
> + * igt_require_pipe_crc:
> + *
> + * Convenience helper to check whether pipe CRC capturing is supported by the
> + * kernel. Uses igt_skip to automatically skip the test/subtest if this isn't
> + * the case.
> + */
> +void igt_require_pipe_crc(int fd)
> +{
> + const char *cmd = "pipe A none";
> + int ctl, written;
> +
> + ctl = igt_debugfs_open(fd, "crtc-0/crc/control", O_RDONLY);
> + if (ctl < 0) {
> + ctl = igt_debugfs_open(fd, "i915_display_crc_ctl", O_WRONLY);
> + igt_require_f(ctl,
> + "No display_crc_ctl found, kernel too old\n");
> +
> + written = write(ctl, cmd, strlen(cmd));
> + igt_require_f(written < 0,
> + "CRCs not supported on this platform\n");
> + }
> + close(ctl);
> +}
> +
> +static igt_pipe_crc_t *
> +pipe_crc_new(int fd, enum pipe pipe, enum intel_pipe_crc_source source, int flags)
> +{
> + igt_pipe_crc_t *pipe_crc;
> + char buf[128];
> + int debugfs;
> +
> + debugfs = igt_debugfs_dir(fd);
> + igt_assert(debugfs != -1);
> +
> + igt_install_exit_handler(pipe_crc_exit_handler);
> +
> + pipe_crc = calloc(1, sizeof(struct _igt_pipe_crc));
> +
> + sprintf(buf, "crtc-%d/crc/control", pipe);
> + pipe_crc->ctl_fd = openat(debugfs, buf, O_WRONLY);
> + if (pipe_crc->ctl_fd == -1) {
> + pipe_crc->ctl_fd = openat(debugfs,
> + "i915_display_crc_ctl", O_WRONLY);
> + igt_assert(pipe_crc->ctl_fd != -1);
> + pipe_crc->is_legacy = true;
> + }
> +
> + if (pipe_crc->is_legacy) {
> + sprintf(buf, "i915_pipe_%s_crc", kmstest_pipe_name(pipe));
> + pipe_crc->crc_fd = openat(debugfs, buf, flags);
> + igt_assert(pipe_crc->crc_fd != -1);
> + igt_debug("Using legacy frame CRC ABI\n");
> + } else {
> + pipe_crc->crc_fd = -1;
> + igt_debug("Using generic frame CRC ABI\n");
> + }
> +
> + pipe_crc->fd = fd;
> + pipe_crc->dir = debugfs;
> + pipe_crc->pipe = pipe;
> + pipe_crc->source = source;
> + pipe_crc->flags = flags;
> +
> + return pipe_crc;
> +}
> +
> +/**
> + * igt_pipe_crc_new:
> + * @pipe: display pipe to use as source
> + * @source: CRC tap point to use as source
> + *
> + * This sets up a new pipe CRC capture object for the given @pipe and @source
> + * in blocking mode.
> + *
> + * Returns: A pipe CRC object for the given @pipe and @source. The library
> + * assumes that the source is always available since recent kernels support at
> + * least INTEL_PIPE_CRC_SOURCE_AUTO everywhere.
> + */
> +igt_pipe_crc_t *
> +igt_pipe_crc_new(int fd, enum pipe pipe, enum intel_pipe_crc_source source)
> +{
> + return pipe_crc_new(fd, pipe, source, O_RDONLY);
> +}
> +
> +/**
> + * igt_pipe_crc_new_nonblock:
> + * @pipe: display pipe to use as source
> + * @source: CRC tap point to use as source
> + *
> + * This sets up a new pipe CRC capture object for the given @pipe and @source
> + * in nonblocking mode.
> + *
> + * Returns: A pipe CRC object for the given @pipe and @source. The library
> + * assumes that the source is always available since recent kernels support at
> + * least INTEL_PIPE_CRC_SOURCE_AUTO everywhere.
> + */
> +igt_pipe_crc_t *
> +igt_pipe_crc_new_nonblock(int fd, enum pipe pipe, enum intel_pipe_crc_source source)
> +{
> + return pipe_crc_new(fd, pipe, source, O_RDONLY | O_NONBLOCK);
> +}
> +
> +/**
> + * igt_pipe_crc_free:
> + * @pipe_crc: pipe CRC object
> + *
> + * Frees all resources associated with @pipe_crc.
> + */
> +void igt_pipe_crc_free(igt_pipe_crc_t *pipe_crc)
> +{
> + if (!pipe_crc)
> + return;
> +
> + close(pipe_crc->ctl_fd);
> + close(pipe_crc->crc_fd);
> + close(pipe_crc->dir);
> + free(pipe_crc);
> +}
> +
> +static bool pipe_crc_init_from_string(igt_pipe_crc_t *pipe_crc, igt_crc_t *crc,
> + const char *line)
> +{
> + int n, i;
> + const char *buf;
> +
> + if (pipe_crc->is_legacy) {
> + crc->has_valid_frame = true;
> + crc->n_words = 5;
> + n = sscanf(line, "%8u %8x %8x %8x %8x %8x", &crc->frame,
> + &crc->crc[0], &crc->crc[1], &crc->crc[2],
> + &crc->crc[3], &crc->crc[4]);
> + return n == 6;
> + }
> +
> + if (strncmp(line, "XXXXXXXXXX", 10) == 0)
> + crc->has_valid_frame = false;
> + else {
> + crc->has_valid_frame = true;
> + crc->frame = strtoul(line, NULL, 16);
> + }
> +
> + buf = line + 10;
> + for (i = 0; *buf != '\n'; i++, buf += 11)
> + crc->crc[i] = strtoul(buf, NULL, 16);
> +
> + crc->n_words = i;
> +
> + return true;
> +}
> +
> +static int read_crc(igt_pipe_crc_t *pipe_crc, igt_crc_t *out)
> +{
> + ssize_t bytes_read;
> + char buf[MAX_LINE_LEN + 1];
> + size_t read_len;
> +
> + if (pipe_crc->is_legacy)
> + read_len = LEGACY_LINE_LEN;
> + else
> + read_len = MAX_LINE_LEN;
> +
> + igt_set_timeout(5, "CRC reading");
> + bytes_read = read(pipe_crc->crc_fd, &buf, read_len);
> + igt_reset_timeout();
> +
> + if (bytes_read < 0 && errno == EAGAIN)
> + igt_assert(pipe_crc->flags & O_NONBLOCK);
> +
> + if (bytes_read < 0)
> + bytes_read = 0;
> +
> + buf[bytes_read] = '\0';
> +
> + if (bytes_read && !pipe_crc_init_from_string(pipe_crc, out, buf))
> + return -EINVAL;
> +
> + return bytes_read;
> +}
> +
> +static void read_one_crc(igt_pipe_crc_t *pipe_crc, igt_crc_t *out)
> +{
> + while (read_crc(pipe_crc, out) == 0)
> + usleep(1000);
> +}
> +
> +/**
> + * igt_pipe_crc_start:
> + * @pipe_crc: pipe CRC object
> + *
> + * Starts the CRC capture process on @pipe_crc.
> + */
> +void igt_pipe_crc_start(igt_pipe_crc_t *pipe_crc)
> +{
> + igt_crc_t crc;
> +
> + igt_assert(igt_pipe_crc_do_start(pipe_crc));
> +
> + if (pipe_crc->is_legacy) {
> + /*
> + * For some no yet identified reason, the first CRC is
> + * bonkers. So let's just wait for the next vblank and read
> + * out the buggy result.
> + *
> + * On CHV sometimes the second CRC is bonkers as well, so
> + * don't trust that one either.
> + */
> + read_one_crc(pipe_crc, &crc);
> + read_one_crc(pipe_crc, &crc);
> + }
> +}
> +
> +/**
> + * igt_pipe_crc_stop:
> + * @pipe_crc: pipe CRC object
> + *
> + * Stops the CRC capture process on @pipe_crc.
> + */
> +void igt_pipe_crc_stop(igt_pipe_crc_t *pipe_crc)
> +{
> + char buf[32];
> +
> + if (pipe_crc->is_legacy) {
> + sprintf(buf, "pipe %s none", kmstest_pipe_name(pipe_crc->pipe));
> + igt_assert_eq(write(pipe_crc->ctl_fd, buf, strlen(buf)),
> + strlen(buf));
> + } else {
> + close(pipe_crc->crc_fd);
> + pipe_crc->crc_fd = -1;
> + }
> +}
> +
> +/**
> + * igt_pipe_crc_get_crcs:
> + * @pipe_crc: pipe CRC object
> + * @n_crcs: number of CRCs to capture
> + * @out_crcs: buffer pointer for the captured CRC values
> + *
> + * Read up to @n_crcs from @pipe_crc. This function does not block, and will
> + * return early if not enough CRCs can be captured, if @pipe_crc has been
> + * opened using igt_pipe_crc_new_nonblock(). It will block until @n_crcs are
> + * retrieved if @pipe_crc has been opened using igt_pipe_crc_new(). @out_crcs is
> + * alloced by this function and must be released with free() by the caller.
> + *
> + * Callers must start and stop the capturing themselves by calling
> + * igt_pipe_crc_start() and igt_pipe_crc_stop(). For one-shot CRC collecting
> + * look at igt_pipe_crc_collect_crc().
> + *
> + * Returns:
> + * The number of CRCs captured. Should be equal to @n_crcs in blocking mode, but
> + * can be less (even zero) in non-blocking mode.
> + */
> +int
> +igt_pipe_crc_get_crcs(igt_pipe_crc_t *pipe_crc, int n_crcs,
> + igt_crc_t **out_crcs)
> +{
> + igt_crc_t *crcs;
> + int n = 0;
> +
> + crcs = calloc(n_crcs, sizeof(igt_crc_t));
> +
> + do {
> + igt_crc_t *crc = &crcs[n];
> + int ret;
> +
> + ret = read_crc(pipe_crc, crc);
> + if (ret < 0)
> + continue;
> + if (ret == 0)
> + break;
> +
> + n++;
> + } while (n < n_crcs);
> +
> + *out_crcs = crcs;
> + return n;
> +}
> +
> +static void crc_sanity_checks(igt_crc_t *crc)
> +{
> + int i;
> + bool all_zero = true;
> +
> + for (i = 0; i < crc->n_words; i++) {
> + igt_warn_on_f(crc->crc[i] == 0xffffffff,
> + "Suspicious CRC: it looks like the CRC "
> + "read back was from a register in a powered "
> + "down well\n");
> + if (crc->crc[i])
> + all_zero = false;
> + }
> +
> + igt_warn_on_f(all_zero, "Suspicious CRC: All values are 0.\n");
> +}
> +
> +/**
> + * igt_pipe_crc_collect_crc:
> + * @pipe_crc: pipe CRC object
> + * @out_crc: buffer for the captured CRC values
> + *
> + * Read a single CRC from @pipe_crc. This function blocks until the CRC is
> + * retrieved, irrespective of whether @pipe_crc has been opened with
> + * igt_pipe_crc_new() or igt_pipe_crc_new_nonblock(). @out_crc must be
> + * allocated by the caller.
> + *
> + * This function takes care of the pipe_crc book-keeping, it will start/stop
> + * the collection of the CRC.
> + *
> + * This function also calls the interactive debug with the "crc" domain, so you
> + * can make use of this feature to actually see the screen that is being CRC'd.
> + *
> + * For continuous CRC collection look at igt_pipe_crc_start(),
> + * igt_pipe_crc_get_crcs() and igt_pipe_crc_stop().
> + */
> +void igt_pipe_crc_collect_crc(igt_pipe_crc_t *pipe_crc, igt_crc_t *out_crc)
> +{
> + igt_debug_wait_for_keypress("crc");
> +
> + igt_pipe_crc_start(pipe_crc);
> + read_one_crc(pipe_crc, out_crc);
> + igt_pipe_crc_stop(pipe_crc);
> +
> + crc_sanity_checks(out_crc);
> +}
> +
> diff --git a/lib/igt_crc.h b/lib/igt_crc.h
> new file mode 100644
> index 00000000..b0623baf
> --- /dev/null
> +++ b/lib/igt_crc.h
> @@ -0,0 +1,125 @@
> +/*
> + * Copyright © 2013 Intel Corporation
> + *
> + * 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 (including the next
> + * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
> + *
> + * # Pipe CRC Support
> + *
> + * This library wraps up the kernel's support for capturing pipe CRCs into a
> + * neat and tidy package. For the detailed usage see all the functions which
> + * work on #igt_pipe_crc_t. This is supported on all platforms and outputs.
> + *
> + * Actually using pipe CRCs to write modeset tests is a bit tricky though, so
> + * there is no way to directly check a CRC: Both the details of the plane
> + * blending, color correction and other hardware and how exactly the CRC is
> + * computed at each tap point vary by hardware generation and are not disclosed.
> + *
> + * The only way to use #igt_crc_t CRCs therefore is to compare CRCs among each
> + * another either for equality or difference. Otherwise CRCs must be treated as
> + * completely opaque values. Note that not even CRCs from different pipes or tap
> + * points on the same platform can be compared. Hence only use
> + * igt_assert_crc_equal() to inspect CRC values captured by the same
> + * #igt_pipe_crc_t object.
> + */
> +
> +#ifndef __IGT_CRC_H__
> +#define __IGT_CRC_H__
> +
> +#include <stdbool.h>
> +#include <stdint.h>
> +
> +enum pipe;
> +
> +/**
> + * igt_pipe_crc_t:
> + *
> + * Pipe CRC support structure. Needs to be allocated and set up with
> + * igt_pipe_crc_new() for a specific pipe and pipe CRC source value.
> + */
> +typedef struct _igt_pipe_crc igt_pipe_crc_t;
> +
> +#define DRM_MAX_CRC_NR 10
> +/**
> + * igt_crc_t:
> + * @frame: frame number of the capture CRC
> + * @n_words: internal field, don't access
> + * @crc: internal field, don't access
> + *
> + * Pipe CRC value. All other members than @frame are private and should not be
> + * inspected by testcases.
> + */
> +typedef struct {
> + uint32_t frame;
> + bool has_valid_frame;
> + int n_words;
> + uint32_t crc[DRM_MAX_CRC_NR];
> +} igt_crc_t;
> +
> +/**
> + * intel_pipe_crc_source:
> + * @INTEL_PIPE_CRC_SOURCE_NONE: No source
> + * @INTEL_PIPE_CRC_SOURCE_PLANE1: Plane 1
> + * @INTEL_PIPE_CRC_SOURCE_PLANE2: Plane 2
> + * @INTEL_PIPE_CRC_SOURCE_PF: Panel Filter
> + * @INTEL_PIPE_CRC_SOURCE_PIPE: Pipe
> + * @INTEL_PIPE_CRC_SOURCE_TV: TV
> + * @INTEL_PIPE_CRC_SOURCE_DP_B: DisplayPort B
> + * @INTEL_PIPE_CRC_SOURCE_DP_C: DisplayPort C
> + * @INTEL_PIPE_CRC_SOURCE_DP_D: DisplayPort D
> + * @INTEL_PIPE_CRC_SOURCE_AUTO: Automatic source selection
> + * @INTEL_PIPE_CRC_SOURCE_MAX: Number of available sources
> + *
> + * Enumeration of all supported pipe CRC sources. Not all platforms and all
> + * outputs support all of them. Generic tests should just use
> + * INTEL_PIPE_CRC_SOURCE_AUTO. It should always map to an end-of-pipe CRC
> + * suitable for checking planes, cursor, color correction and any other
> + * output-agnostic features.
> + */
> +enum intel_pipe_crc_source {
> + INTEL_PIPE_CRC_SOURCE_NONE,
> + INTEL_PIPE_CRC_SOURCE_PLANE1,
> + INTEL_PIPE_CRC_SOURCE_PLANE2,
> + INTEL_PIPE_CRC_SOURCE_PF,
> + INTEL_PIPE_CRC_SOURCE_PIPE,
> + INTEL_PIPE_CRC_SOURCE_TV,
> + INTEL_PIPE_CRC_SOURCE_DP_B,
> + INTEL_PIPE_CRC_SOURCE_DP_C,
> + INTEL_PIPE_CRC_SOURCE_DP_D,
> + INTEL_PIPE_CRC_SOURCE_AUTO,
> + INTEL_PIPE_CRC_SOURCE_MAX,
> +};
> +
> +void igt_assert_crc_equal(const igt_crc_t *a, const igt_crc_t *b);
> +char *igt_crc_to_string(igt_crc_t *crc);
> +
> +void igt_require_pipe_crc(int fd);
> +igt_pipe_crc_t *
> +igt_pipe_crc_new(int fd, enum pipe pipe, enum intel_pipe_crc_source source);
> +igt_pipe_crc_t *
> +igt_pipe_crc_new_nonblock(int fd, enum pipe pipe, enum intel_pipe_crc_source source);
> +void igt_pipe_crc_free(igt_pipe_crc_t *pipe_crc);
> +void igt_pipe_crc_start(igt_pipe_crc_t *pipe_crc);
> +void igt_pipe_crc_stop(igt_pipe_crc_t *pipe_crc);
> +__attribute__((warn_unused_result))
> +int igt_pipe_crc_get_crcs(igt_pipe_crc_t *pipe_crc, int n_crcs,
> + igt_crc_t **out_crcs);
> +void igt_pipe_crc_collect_crc(igt_pipe_crc_t *pipe_crc, igt_crc_t *out_crc);
> +
> +#endif /* __IGT_CRC_H__ */
> diff --git a/lib/igt_debugfs.c b/lib/igt_debugfs.c
> index 80f25c61..e08b7ae8 100644
> --- a/lib/igt_debugfs.c
> +++ b/lib/igt_debugfs.c
> @@ -51,24 +51,6 @@
> * basic functions to access debugfs files with e.g. igt_debugfs_open() it also
> * provides higher-level wrappers for some debugfs features.
> *
> - * # Pipe CRC Support
> - *
> - * This library wraps up the kernel's support for capturing pipe CRCs into a
> - * neat and tidy package. For the detailed usage see all the functions which
> - * work on #igt_pipe_crc_t. This is supported on all platforms and outputs.
> - *
> - * Actually using pipe CRCs to write modeset tests is a bit tricky though, so
> - * there is no way to directly check a CRC: Both the details of the plane
> - * blending, color correction and other hardware and how exactly the CRC is
> - * computed at each tap point vary by hardware generation and are not disclosed.
> - *
> - * The only way to use #igt_crc_t CRCs therefore is to compare CRCs among each
> - * another either for equality or difference. Otherwise CRCs must be treated as
> - * completely opaque values. Note that not even CRCs from different pipes or tap
> - * points on the same platform can be compared. Hence only use
> - * igt_assert_crc_equal() to inspect CRC values captured by the same
> - * #igt_pipe_crc_t object.
> - *
> * # Other debugfs interface wrappers
> *
> * This covers the miscellaneous debugfs interface wrappers:
> @@ -277,235 +259,6 @@ bool igt_debugfs_search(int device, const char *filename, const char *substring)
> return matched;
> }
>
> -/*
> - * Pipe CRC
> - */
> -
> -/**
> - * igt_assert_crc_equal:
> - * @a: first pipe CRC value
> - * @b: second pipe CRC value
> - *
> - * Compares two CRC values and fails the testcase if they don't match with
> - * igt_fail(). Note that due to CRC collisions CRC based testcase can only
> - * assert that CRCs match, never that they are different. Otherwise there might
> - * be random testcase failures when different screen contents end up with the
> - * same CRC by chance.
> - */
> -void igt_assert_crc_equal(const igt_crc_t *a, const igt_crc_t *b)
> -{
> - int i;
> -
> - for (i = 0; i < a->n_words; i++)
> - igt_assert_eq_u32(a->crc[i], b->crc[i]);
> -}
> -
> -/**
> - * igt_crc_to_string:
> - * @crc: pipe CRC value to print
> - *
> - * This formats @crc into a string buffer which is owned by igt_crc_to_string().
> - * The next call will override the buffer again, which makes this multithreading
> - * unsafe.
> - *
> - * This should only ever be used for diagnostic debug output.
> - */
> -char *igt_crc_to_string(igt_crc_t *crc)
> -{
> - int i;
> - char buf[128] = { 0 };
> -
> - for (i = 0; i < crc->n_words; i++)
> - sprintf(buf + strlen(buf), "%08x ", crc->crc[i]);
> -
> - return strdup(buf);
> -}
> -
> -#define MAX_CRC_ENTRIES 10
> -#define MAX_LINE_LEN (10 + 11 * MAX_CRC_ENTRIES + 1)
> -
> -/* (6 fields, 8 chars each, space separated (5) + '\n') */
> -#define LEGACY_LINE_LEN (6 * 8 + 5 + 1)
> -
> -struct _igt_pipe_crc {
> - int fd;
> - int dir;
> - int ctl_fd;
> - int crc_fd;
> - int flags;
> - bool is_legacy;
> -
> - enum pipe pipe;
> - enum intel_pipe_crc_source source;
> -};
> -
> -static const char *pipe_crc_sources[] = {
> - "none",
> - "plane1",
> - "plane2",
> - "pf",
> - "pipe",
> - "TV",
> - "DP-B",
> - "DP-C",
> - "DP-D",
> - "auto"
> -};
> -
> -static const char *pipe_crc_source_name(enum intel_pipe_crc_source source)
> -{
> - return pipe_crc_sources[source];
> -}
> -
> -static bool igt_pipe_crc_do_start(igt_pipe_crc_t *pipe_crc)
> -{
> - char buf[64];
> -
> - /* Stop first just to make sure we don't have lingering state left. */
> - igt_pipe_crc_stop(pipe_crc);
> -
> - if (pipe_crc->is_legacy)
> - sprintf(buf, "pipe %s %s", kmstest_pipe_name(pipe_crc->pipe),
> - pipe_crc_source_name(pipe_crc->source));
> - else
> - sprintf(buf, "%s", pipe_crc_source_name(pipe_crc->source));
> -
> - igt_assert_eq(write(pipe_crc->ctl_fd, buf, strlen(buf)), strlen(buf));
> -
> - if (!pipe_crc->is_legacy) {
> - int err;
> -
> - sprintf(buf, "crtc-%d/crc/data", pipe_crc->pipe);
> - err = 0;
> -
> - pipe_crc->crc_fd = openat(pipe_crc->dir, buf, pipe_crc->flags);
> - if (pipe_crc->crc_fd < 0)
> - err = -errno;
> -
> - if (err == -EINVAL)
> - return false;
> -
> - igt_assert_eq(err, 0);
> - }
> -
> - errno = 0;
> - return true;
> -}
> -
> -static void igt_pipe_crc_pipe_off(int fd, enum pipe pipe)
> -{
> - char buf[32];
> -
> - sprintf(buf, "pipe %s none", kmstest_pipe_name(pipe));
> - igt_assert_eq(write(fd, buf, strlen(buf)), strlen(buf));
> -}
> -
> -static void igt_pipe_crc_reset(int drm_fd)
> -{
> - struct dirent *dirent;
> - const char *cmd = "none";
> - bool done = false;
> - DIR *dir;
> - int fdir;
> - int fd;
> -
> - fdir = igt_debugfs_dir(drm_fd);
> - if (fdir < 0)
> - return;
> -
> - dir = fdopendir(fdir);
> - if (!dir) {
> - close(fdir);
> - return;
> - }
> -
> - while ((dirent = readdir(dir))) {
> - char buf[128];
> -
> - if (strcmp(dirent->d_name, "crtc-") != 0)
> - continue;
> -
> - sprintf(buf, "%s/crc/control", dirent->d_name);
> - fd = openat(fdir, buf, O_WRONLY);
> - if (fd < 0)
> - continue;
> -
> - igt_assert_eq(write(fd, cmd, strlen(cmd)), strlen(cmd));
> - close(fd);
> -
> - done = true;
> - }
> - closedir(dir);
> -
> - if (!done) {
> - fd = openat(fdir, "i915_display_crtc_ctl", O_WRONLY);
> - if (fd != -1) {
> - igt_pipe_crc_pipe_off(fd, PIPE_A);
> - igt_pipe_crc_pipe_off(fd, PIPE_B);
> - igt_pipe_crc_pipe_off(fd, PIPE_C);
> -
> - close(fd);
> - }
> - }
> -
> - close(fdir);
> -}
> -
> -static void pipe_crc_exit_handler(int sig)
> -{
> - struct dirent *dirent;
> - char buf[128];
> - DIR *dir;
> - int fd;
> -
> - dir = opendir("/dev/dri");
> - if (!dir)
> - return;
> -
> - /*
> - * Try to reset CRC capture for all DRM devices, this is only needed
> - * for the legacy CRC ABI and can be completely removed once the
> - * legacy codepaths are removed.
> - */
> - while ((dirent = readdir(dir))) {
> - if (strncmp(dirent->d_name, "card", 4) != 0)
> - continue;
> -
> - sprintf(buf, "/dev/dri/%s", dirent->d_name);
> - fd = open(buf, O_WRONLY);
> -
> - igt_pipe_crc_reset(fd);
> -
> - close(fd);
> - }
> - closedir(dir);
> -}
> -
> -/**
> - * igt_require_pipe_crc:
> - *
> - * Convenience helper to check whether pipe CRC capturing is supported by the
> - * kernel. Uses igt_skip to automatically skip the test/subtest if this isn't
> - * the case.
> - */
> -void igt_require_pipe_crc(int fd)
> -{
> - const char *cmd = "pipe A none";
> - int ctl, written;
> -
> - ctl = igt_debugfs_open(fd, "crtc-0/crc/control", O_RDONLY);
> - if (ctl < 0) {
> - ctl = igt_debugfs_open(fd, "i915_display_crc_ctl", O_WRONLY);
> - igt_require_f(ctl,
> - "No display_crc_ctl found, kernel too old\n");
> -
> - written = write(ctl, cmd, strlen(cmd));
> - igt_require_f(written < 0,
> - "CRCs not supported on this platform\n");
> - }
> - close(ctl);
> -}
> -
> static void igt_hpd_storm_exit_handler(int sig)
> {
> int fd = drm_open_driver_master(DRIVER_INTEL);
> @@ -627,306 +380,6 @@ void igt_require_hpd_storm_ctl(int drm_fd)
> close(fd);
> }
>
> -static igt_pipe_crc_t *
> -pipe_crc_new(int fd, enum pipe pipe, enum intel_pipe_crc_source source, int flags)
> -{
> - igt_pipe_crc_t *pipe_crc;
> - char buf[128];
> - int debugfs;
> -
> - debugfs = igt_debugfs_dir(fd);
> - igt_assert(debugfs != -1);
> -
> - igt_install_exit_handler(pipe_crc_exit_handler);
> -
> - pipe_crc = calloc(1, sizeof(struct _igt_pipe_crc));
> -
> - sprintf(buf, "crtc-%d/crc/control", pipe);
> - pipe_crc->ctl_fd = openat(debugfs, buf, O_WRONLY);
> - if (pipe_crc->ctl_fd == -1) {
> - pipe_crc->ctl_fd = openat(debugfs,
> - "i915_display_crc_ctl", O_WRONLY);
> - igt_assert(pipe_crc->ctl_fd != -1);
> - pipe_crc->is_legacy = true;
> - }
> -
> - if (pipe_crc->is_legacy) {
> - sprintf(buf, "i915_pipe_%s_crc", kmstest_pipe_name(pipe));
> - pipe_crc->crc_fd = openat(debugfs, buf, flags);
> - igt_assert(pipe_crc->crc_fd != -1);
> - igt_debug("Using legacy frame CRC ABI\n");
> - } else {
> - pipe_crc->crc_fd = -1;
> - igt_debug("Using generic frame CRC ABI\n");
> - }
> -
> - pipe_crc->fd = fd;
> - pipe_crc->dir = debugfs;
> - pipe_crc->pipe = pipe;
> - pipe_crc->source = source;
> - pipe_crc->flags = flags;
> -
> - return pipe_crc;
> -}
> -
> -/**
> - * igt_pipe_crc_new:
> - * @pipe: display pipe to use as source
> - * @source: CRC tap point to use as source
> - *
> - * This sets up a new pipe CRC capture object for the given @pipe and @source
> - * in blocking mode.
> - *
> - * Returns: A pipe CRC object for the given @pipe and @source. The library
> - * assumes that the source is always available since recent kernels support at
> - * least INTEL_PIPE_CRC_SOURCE_AUTO everywhere.
> - */
> -igt_pipe_crc_t *
> -igt_pipe_crc_new(int fd, enum pipe pipe, enum intel_pipe_crc_source source)
> -{
> - return pipe_crc_new(fd, pipe, source, O_RDONLY);
> -}
> -
> -/**
> - * igt_pipe_crc_new_nonblock:
> - * @pipe: display pipe to use as source
> - * @source: CRC tap point to use as source
> - *
> - * This sets up a new pipe CRC capture object for the given @pipe and @source
> - * in nonblocking mode.
> - *
> - * Returns: A pipe CRC object for the given @pipe and @source. The library
> - * assumes that the source is always available since recent kernels support at
> - * least INTEL_PIPE_CRC_SOURCE_AUTO everywhere.
> - */
> -igt_pipe_crc_t *
> -igt_pipe_crc_new_nonblock(int fd, enum pipe pipe, enum intel_pipe_crc_source source)
> -{
> - return pipe_crc_new(fd, pipe, source, O_RDONLY | O_NONBLOCK);
> -}
> -
> -/**
> - * igt_pipe_crc_free:
> - * @pipe_crc: pipe CRC object
> - *
> - * Frees all resources associated with @pipe_crc.
> - */
> -void igt_pipe_crc_free(igt_pipe_crc_t *pipe_crc)
> -{
> - if (!pipe_crc)
> - return;
> -
> - close(pipe_crc->ctl_fd);
> - close(pipe_crc->crc_fd);
> - close(pipe_crc->dir);
> - free(pipe_crc);
> -}
> -
> -static bool pipe_crc_init_from_string(igt_pipe_crc_t *pipe_crc, igt_crc_t *crc,
> - const char *line)
> -{
> - int n, i;
> - const char *buf;
> -
> - if (pipe_crc->is_legacy) {
> - crc->has_valid_frame = true;
> - crc->n_words = 5;
> - n = sscanf(line, "%8u %8x %8x %8x %8x %8x", &crc->frame,
> - &crc->crc[0], &crc->crc[1], &crc->crc[2],
> - &crc->crc[3], &crc->crc[4]);
> - return n == 6;
> - }
> -
> - if (strncmp(line, "XXXXXXXXXX", 10) == 0)
> - crc->has_valid_frame = false;
> - else {
> - crc->has_valid_frame = true;
> - crc->frame = strtoul(line, NULL, 16);
> - }
> -
> - buf = line + 10;
> - for (i = 0; *buf != '\n'; i++, buf += 11)
> - crc->crc[i] = strtoul(buf, NULL, 16);
> -
> - crc->n_words = i;
> -
> - return true;
> -}
> -
> -static int read_crc(igt_pipe_crc_t *pipe_crc, igt_crc_t *out)
> -{
> - ssize_t bytes_read;
> - char buf[MAX_LINE_LEN + 1];
> - size_t read_len;
> -
> - if (pipe_crc->is_legacy)
> - read_len = LEGACY_LINE_LEN;
> - else
> - read_len = MAX_LINE_LEN;
> -
> - igt_set_timeout(5, "CRC reading");
> - bytes_read = read(pipe_crc->crc_fd, &buf, read_len);
> - igt_reset_timeout();
> -
> - if (bytes_read < 0 && errno == EAGAIN)
> - igt_assert(pipe_crc->flags & O_NONBLOCK);
> -
> - if (bytes_read < 0)
> - bytes_read = 0;
> -
> - buf[bytes_read] = '\0';
> -
> - if (bytes_read && !pipe_crc_init_from_string(pipe_crc, out, buf))
> - return -EINVAL;
> -
> - return bytes_read;
> -}
> -
> -static void read_one_crc(igt_pipe_crc_t *pipe_crc, igt_crc_t *out)
> -{
> - while (read_crc(pipe_crc, out) == 0)
> - usleep(1000);
> -}
> -
> -/**
> - * igt_pipe_crc_start:
> - * @pipe_crc: pipe CRC object
> - *
> - * Starts the CRC capture process on @pipe_crc.
> - */
> -void igt_pipe_crc_start(igt_pipe_crc_t *pipe_crc)
> -{
> - igt_crc_t crc;
> -
> - igt_assert(igt_pipe_crc_do_start(pipe_crc));
> -
> - if (pipe_crc->is_legacy) {
> - /*
> - * For some no yet identified reason, the first CRC is
> - * bonkers. So let's just wait for the next vblank and read
> - * out the buggy result.
> - *
> - * On CHV sometimes the second CRC is bonkers as well, so
> - * don't trust that one either.
> - */
> - read_one_crc(pipe_crc, &crc);
> - read_one_crc(pipe_crc, &crc);
> - }
> -}
> -
> -/**
> - * igt_pipe_crc_stop:
> - * @pipe_crc: pipe CRC object
> - *
> - * Stops the CRC capture process on @pipe_crc.
> - */
> -void igt_pipe_crc_stop(igt_pipe_crc_t *pipe_crc)
> -{
> - char buf[32];
> -
> - if (pipe_crc->is_legacy) {
> - sprintf(buf, "pipe %s none", kmstest_pipe_name(pipe_crc->pipe));
> - igt_assert_eq(write(pipe_crc->ctl_fd, buf, strlen(buf)),
> - strlen(buf));
> - } else {
> - close(pipe_crc->crc_fd);
> - pipe_crc->crc_fd = -1;
> - }
> -}
> -
> -/**
> - * igt_pipe_crc_get_crcs:
> - * @pipe_crc: pipe CRC object
> - * @n_crcs: number of CRCs to capture
> - * @out_crcs: buffer pointer for the captured CRC values
> - *
> - * Read up to @n_crcs from @pipe_crc. This function does not block, and will
> - * return early if not enough CRCs can be captured, if @pipe_crc has been
> - * opened using igt_pipe_crc_new_nonblock(). It will block until @n_crcs are
> - * retrieved if @pipe_crc has been opened using igt_pipe_crc_new(). @out_crcs is
> - * alloced by this function and must be released with free() by the caller.
> - *
> - * Callers must start and stop the capturing themselves by calling
> - * igt_pipe_crc_start() and igt_pipe_crc_stop(). For one-shot CRC collecting
> - * look at igt_pipe_crc_collect_crc().
> - *
> - * Returns:
> - * The number of CRCs captured. Should be equal to @n_crcs in blocking mode, but
> - * can be less (even zero) in non-blocking mode.
> - */
> -int
> -igt_pipe_crc_get_crcs(igt_pipe_crc_t *pipe_crc, int n_crcs,
> - igt_crc_t **out_crcs)
> -{
> - igt_crc_t *crcs;
> - int n = 0;
> -
> - crcs = calloc(n_crcs, sizeof(igt_crc_t));
> -
> - do {
> - igt_crc_t *crc = &crcs[n];
> - int ret;
> -
> - ret = read_crc(pipe_crc, crc);
> - if (ret < 0)
> - continue;
> - if (ret == 0)
> - break;
> -
> - n++;
> - } while (n < n_crcs);
> -
> - *out_crcs = crcs;
> - return n;
> -}
> -
> -static void crc_sanity_checks(igt_crc_t *crc)
> -{
> - int i;
> - bool all_zero = true;
> -
> - for (i = 0; i < crc->n_words; i++) {
> - igt_warn_on_f(crc->crc[i] == 0xffffffff,
> - "Suspicious CRC: it looks like the CRC "
> - "read back was from a register in a powered "
> - "down well\n");
> - if (crc->crc[i])
> - all_zero = false;
> - }
> -
> - igt_warn_on_f(all_zero, "Suspicious CRC: All values are 0.\n");
> -}
> -
> -/**
> - * igt_pipe_crc_collect_crc:
> - * @pipe_crc: pipe CRC object
> - * @out_crc: buffer for the captured CRC values
> - *
> - * Read a single CRC from @pipe_crc. This function blocks until the CRC is
> - * retrieved, irrespective of whether @pipe_crc has been opened with
> - * igt_pipe_crc_new() or igt_pipe_crc_new_nonblock(). @out_crc must be
> - * allocated by the caller.
> - *
> - * This function takes care of the pipe_crc book-keeping, it will start/stop
> - * the collection of the CRC.
> - *
> - * This function also calls the interactive debug with the "crc" domain, so you
> - * can make use of this feature to actually see the screen that is being CRC'd.
> - *
> - * For continuous CRC collection look at igt_pipe_crc_start(),
> - * igt_pipe_crc_get_crcs() and igt_pipe_crc_stop().
> - */
> -void igt_pipe_crc_collect_crc(igt_pipe_crc_t *pipe_crc, igt_crc_t *out_crc)
> -{
> - igt_debug_wait_for_keypress("crc");
> -
> - igt_pipe_crc_start(pipe_crc);
> - read_one_crc(pipe_crc, out_crc);
> - igt_pipe_crc_stop(pipe_crc);
> -
> - crc_sanity_checks(out_crc);
> -}
> -
> /*
> * Drop caches
> */
> diff --git a/lib/igt_debugfs.h b/lib/igt_debugfs.h
> index 7b846a83..01a5ee07 100644
> --- a/lib/igt_debugfs.h
> +++ b/lib/igt_debugfs.h
> @@ -29,8 +29,6 @@
> #include <stdint.h>
> #include <stdio.h>
>
> -enum pipe;
> -
> const char *igt_debugfs_mount(void);
>
> int igt_debugfs_dir(int device);
> @@ -50,85 +48,6 @@ bool igt_debugfs_search(int fd, const char *filename, const char *substring);
> #define igt_debugfs_read(fd, filename, buf) \
> __igt_debugfs_read(fd, (filename), (buf), sizeof(buf))
>
> -/*
> - * Pipe CRC
> - */
> -
> -/**
> - * igt_pipe_crc_t:
> - *
> - * Pipe CRC support structure. Needs to be allocated and set up with
> - * igt_pipe_crc_new() for a specific pipe and pipe CRC source value.
> - */
> -typedef struct _igt_pipe_crc igt_pipe_crc_t;
> -
> -#define DRM_MAX_CRC_NR 10
> -/**
> - * igt_crc_t:
> - * @frame: frame number of the capture CRC
> - * @n_words: internal field, don't access
> - * @crc: internal field, don't access
> - *
> - * Pipe CRC value. All other members than @frame are private and should not be
> - * inspected by testcases.
> - */
> -typedef struct {
> - uint32_t frame;
> - bool has_valid_frame;
> - int n_words;
> - uint32_t crc[DRM_MAX_CRC_NR];
> -} igt_crc_t;
> -
> -/**
> - * intel_pipe_crc_source:
> - * @INTEL_PIPE_CRC_SOURCE_NONE: No source
> - * @INTEL_PIPE_CRC_SOURCE_PLANE1: Plane 1
> - * @INTEL_PIPE_CRC_SOURCE_PLANE2: Plane 2
> - * @INTEL_PIPE_CRC_SOURCE_PF: Panel Filter
> - * @INTEL_PIPE_CRC_SOURCE_PIPE: Pipe
> - * @INTEL_PIPE_CRC_SOURCE_TV: TV
> - * @INTEL_PIPE_CRC_SOURCE_DP_B: DisplayPort B
> - * @INTEL_PIPE_CRC_SOURCE_DP_C: DisplayPort C
> - * @INTEL_PIPE_CRC_SOURCE_DP_D: DisplayPort D
> - * @INTEL_PIPE_CRC_SOURCE_AUTO: Automatic source selection
> - * @INTEL_PIPE_CRC_SOURCE_MAX: Number of available sources
> - *
> - * Enumeration of all supported pipe CRC sources. Not all platforms and all
> - * outputs support all of them. Generic tests should just use
> - * INTEL_PIPE_CRC_SOURCE_AUTO. It should always map to an end-of-pipe CRC
> - * suitable for checking planes, cursor, color correction and any other
> - * output-agnostic features.
> - */
> -enum intel_pipe_crc_source {
> - INTEL_PIPE_CRC_SOURCE_NONE,
> - INTEL_PIPE_CRC_SOURCE_PLANE1,
> - INTEL_PIPE_CRC_SOURCE_PLANE2,
> - INTEL_PIPE_CRC_SOURCE_PF,
> - INTEL_PIPE_CRC_SOURCE_PIPE,
> - INTEL_PIPE_CRC_SOURCE_TV,
> - INTEL_PIPE_CRC_SOURCE_DP_B,
> - INTEL_PIPE_CRC_SOURCE_DP_C,
> - INTEL_PIPE_CRC_SOURCE_DP_D,
> - INTEL_PIPE_CRC_SOURCE_AUTO,
> - INTEL_PIPE_CRC_SOURCE_MAX,
> -};
> -
> -void igt_assert_crc_equal(const igt_crc_t *a, const igt_crc_t *b);
> -char *igt_crc_to_string(igt_crc_t *crc);
> -
> -void igt_require_pipe_crc(int fd);
> -igt_pipe_crc_t *
> -igt_pipe_crc_new(int fd, enum pipe pipe, enum intel_pipe_crc_source source);
> -igt_pipe_crc_t *
> -igt_pipe_crc_new_nonblock(int fd, enum pipe pipe, enum intel_pipe_crc_source source);
> -void igt_pipe_crc_free(igt_pipe_crc_t *pipe_crc);
> -void igt_pipe_crc_start(igt_pipe_crc_t *pipe_crc);
> -void igt_pipe_crc_stop(igt_pipe_crc_t *pipe_crc);
> -__attribute__((warn_unused_result))
> -int igt_pipe_crc_get_crcs(igt_pipe_crc_t *pipe_crc, int n_crcs,
> - igt_crc_t **out_crcs);
> -void igt_pipe_crc_collect_crc(igt_pipe_crc_t *pipe_crc, igt_crc_t *out_crc);
> -
> void igt_hpd_storm_set_threshold(int fd, unsigned int threshold);
> void igt_hpd_storm_reset(int fd);
> bool igt_hpd_storm_detected(int fd);
> diff --git a/tests/chamelium.c b/tests/chamelium.c
> index b412c6a7..9b0424d1 100644
> --- a/tests/chamelium.c
> +++ b/tests/chamelium.c
> @@ -26,6 +26,7 @@
>
> #include "config.h"
> #include "igt.h"
> +#include "igt_crc.h"
>
> #include <fcntl.h>
> #include <string.h>
> diff --git a/tests/kms_atomic_transition.c b/tests/kms_atomic_transition.c
> index ba5cd4d6..37de838f 100644
> --- a/tests/kms_atomic_transition.c
> +++ b/tests/kms_atomic_transition.c
> @@ -22,6 +22,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include "drmtest.h"
> #include "sw_sync.h"
> #include <errno.h>
> diff --git a/tests/kms_ccs.c b/tests/kms_ccs.c
> index 29d676af..66bd0f29 100644
> --- a/tests/kms_ccs.c
> +++ b/tests/kms_ccs.c
> @@ -23,6 +23,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
>
> IGT_TEST_DESCRIPTION("Test render compression (RC), in which the main surface "
> "is complemented by a color control surface (CCS) that "
> diff --git a/tests/kms_chv_cursor_fail.c b/tests/kms_chv_cursor_fail.c
> index 3e74df11..b02958bd 100644
> --- a/tests/kms_chv_cursor_fail.c
> +++ b/tests/kms_chv_cursor_fail.c
> @@ -23,6 +23,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include <errno.h>
> #include <limits.h>
> #include <stdbool.h>
> diff --git a/tests/kms_crtc_background_color.c b/tests/kms_crtc_background_color.c
> index e12e1634..3bcabcac 100644
> --- a/tests/kms_crtc_background_color.c
> +++ b/tests/kms_crtc_background_color.c
> @@ -23,6 +23,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include <math.h>
>
>
> diff --git a/tests/kms_cursor_crc.c b/tests/kms_cursor_crc.c
> index 4c5e00c0..4693e9f4 100644
> --- a/tests/kms_cursor_crc.c
> +++ b/tests/kms_cursor_crc.c
> @@ -23,6 +23,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include <errno.h>
> #include <limits.h>
> #include <stdbool.h>
> diff --git a/tests/kms_cursor_legacy.c b/tests/kms_cursor_legacy.c
> index 8180b043..505e3f9d 100644
> --- a/tests/kms_cursor_legacy.c
> +++ b/tests/kms_cursor_legacy.c
> @@ -27,6 +27,7 @@
> #include <sys/poll.h>
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include "igt_rand.h"
> #include "igt_stats.h"
>
> diff --git a/tests/kms_draw_crc.c b/tests/kms_draw_crc.c
> index c57d3a35..8cb4e147 100644
> --- a/tests/kms_draw_crc.c
> +++ b/tests/kms_draw_crc.c
> @@ -25,6 +25,7 @@
> /* This program tests whether the igt_draw library actually works. */
>
> #include "igt.h"
> +#include "igt_crc.h"
>
> #define MAX_CONNECTORS 32
>
> diff --git a/tests/kms_fbc_crc.c b/tests/kms_fbc_crc.c
> index 7964e052..10656b89 100644
> --- a/tests/kms_fbc_crc.c
> +++ b/tests/kms_fbc_crc.c
> @@ -23,6 +23,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include <errno.h>
> #include <stdbool.h>
> #include <stdio.h>
> diff --git a/tests/kms_flip_tiling.c b/tests/kms_flip_tiling.c
> index 5aae29a8..8e1a2fb4 100644
> --- a/tests/kms_flip_tiling.c
> +++ b/tests/kms_flip_tiling.c
> @@ -25,6 +25,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include <errno.h>
> #include <stdbool.h>
> #include <stdio.h>
> diff --git a/tests/kms_frontbuffer_tracking.c b/tests/kms_frontbuffer_tracking.c
> index c24e4a81..4af5e006 100644
> --- a/tests/kms_frontbuffer_tracking.c
> +++ b/tests/kms_frontbuffer_tracking.c
> @@ -25,6 +25,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include "igt_sysfs.h"
> #include <sys/types.h>
> #include <sys/stat.h>
> diff --git a/tests/kms_mmap_write_crc.c b/tests/kms_mmap_write_crc.c
> index e5f089f6..79efa792 100644
> --- a/tests/kms_mmap_write_crc.c
> +++ b/tests/kms_mmap_write_crc.c
> @@ -31,6 +31,7 @@
> #include <string.h>
>
> #include "drmtest.h"
> +#include "igt_crc.h"
> #include "igt_debugfs.h"
> #include "igt_kms.h"
> #include "intel_chipset.h"
> diff --git a/tests/kms_mmio_vs_cs_flip.c b/tests/kms_mmio_vs_cs_flip.c
> index fa947d9c..ee1d202a 100644
> --- a/tests/kms_mmio_vs_cs_flip.c
> +++ b/tests/kms_mmio_vs_cs_flip.c
> @@ -22,6 +22,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include <errno.h>
> #include <stdbool.h>
> #include <stdio.h>
> diff --git a/tests/kms_pipe_color.c b/tests/kms_pipe_color.c
> index a3100fae..389fb3de 100644
> --- a/tests/kms_pipe_color.c
> +++ b/tests/kms_pipe_color.c
> @@ -28,6 +28,7 @@
> #include "drm.h"
> #include "drmtest.h"
> #include "igt.h"
> +#include "igt_crc.h"
>
> IGT_TEST_DESCRIPTION("Test Color Features at Pipe level");
>
> diff --git a/tests/kms_pipe_crc_basic.c b/tests/kms_pipe_crc_basic.c
> index 35adddba..38da3a42 100644
> --- a/tests/kms_pipe_crc_basic.c
> +++ b/tests/kms_pipe_crc_basic.c
> @@ -23,6 +23,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include "igt_sysfs.h"
> #include <errno.h>
> #include <stdbool.h>
> diff --git a/tests/kms_plane.c b/tests/kms_plane.c
> index 1d92a62b..2fa58e8f 100644
> --- a/tests/kms_plane.c
> +++ b/tests/kms_plane.c
> @@ -25,6 +25,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include <errno.h>
> #include <stdbool.h>
> #include <stdio.h>
> diff --git a/tests/kms_plane_lowres.c b/tests/kms_plane_lowres.c
> index ee39759c..a4e37275 100644
> --- a/tests/kms_plane_lowres.c
> +++ b/tests/kms_plane_lowres.c
> @@ -23,6 +23,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include "drmtest.h"
> #include <errno.h>
> #include <stdbool.h>
> diff --git a/tests/kms_plane_multiple.c b/tests/kms_plane_multiple.c
> index f6c62235..1b60a067 100644
> --- a/tests/kms_plane_multiple.c
> +++ b/tests/kms_plane_multiple.c
> @@ -23,6 +23,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include "drmtest.h"
> #include <errno.h>
> #include <stdbool.h>
> diff --git a/tests/kms_plane_scaling.c b/tests/kms_plane_scaling.c
> index 1457894a..d554f27f 100644
> --- a/tests/kms_plane_scaling.c
> +++ b/tests/kms_plane_scaling.c
> @@ -23,6 +23,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include <math.h>
>
>
> diff --git a/tests/kms_pwrite_crc.c b/tests/kms_pwrite_crc.c
> index ee895db6..f1e6f023 100644
> --- a/tests/kms_pwrite_crc.c
> +++ b/tests/kms_pwrite_crc.c
> @@ -23,6 +23,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include <errno.h>
> #include <limits.h>
> #include <stdbool.h>
> diff --git a/tests/kms_rotation_crc.c b/tests/kms_rotation_crc.c
> index 83e37f12..fa361100 100644
> --- a/tests/kms_rotation_crc.c
> +++ b/tests/kms_rotation_crc.c
> @@ -23,6 +23,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include <math.h>
>
> #define MAX_FENCES 32
> diff --git a/tests/kms_universal_plane.c b/tests/kms_universal_plane.c
> index 31f07804..14300b7a 100644
> --- a/tests/kms_universal_plane.c
> +++ b/tests/kms_universal_plane.c
> @@ -22,6 +22,7 @@
> */
>
> #include "igt.h"
> +#include "igt_crc.h"
> #include <errno.h>
> #include <stdbool.h>
> #include <stdio.h>
> diff --git a/tools/intel_display_crc.c b/tools/intel_display_crc.c
> index d1b28ea7..104f432f 100644
> --- a/tools/intel_display_crc.c
> +++ b/tools/intel_display_crc.c
> @@ -30,6 +30,7 @@
> #include <unistd.h>
>
> #include "igt_core.h"
> +#include "igt_crc.h"
> #include "igt_debugfs.h"
> #include "igt_kms.h"
>
> --
> 2.13.1
>
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