@@ -25,6 +25,7 @@
#include <inttypes.h>
#include <sys/stat.h>
#include <sys/mount.h>
+#include <dirent.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
@@ -247,6 +248,10 @@ bool igt_debugfs_search(const char *filename, const char *substring)
* Pipe CRC
*/
+#define CRC_DEFAULTS 0
+#define CRC_FORCE_LEGACY (1 << 0)
+#define CRC_NONBLOCK (1 << 1)
+
/**
* igt_assert_crc_equal:
* @a: first pipe CRC value
@@ -280,25 +285,23 @@ char *igt_crc_to_string(igt_crc_t *crc)
{
char buf[128];
- igt_assert_eq(crc->n_words, 5);
-
sprintf(buf, "%08x %08x %08x %08x %08x", crc->crc[0],
crc->crc[1], crc->crc[2], crc->crc[3], crc->crc[4]);
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 PIPE_CRC_LINE_LEN (6 * 8 + 5 + 1)
-/* account for \'0' */
-#define PIPE_CRC_BUFFER_LEN (PIPE_CRC_LINE_LEN + 1)
+#define LEGACY_LINE_LEN (6 * 8 + 5 + 1)
struct _igt_pipe_crc {
int ctl_fd;
int crc_fd;
- int line_len;
- int buffer_len;
int flags;
+ bool is_legacy;
enum pipe pipe;
enum intel_pipe_crc_source source;
@@ -319,23 +322,39 @@ static const char *pipe_crc_sources[] = {
static const char *pipe_crc_source_name(enum intel_pipe_crc_source source)
{
- return pipe_crc_sources[source];
+ return pipe_crc_sources[source];
}
static bool igt_pipe_crc_do_start(igt_pipe_crc_t *pipe_crc)
{
char buf[64];
+ int mode = O_RDONLY;
/* Stop first just to make sure we don't have lingering state left. */
igt_pipe_crc_stop(pipe_crc);
- sprintf(buf, "pipe %s %s", kmstest_pipe_name(pipe_crc->pipe),
- pipe_crc_source_name(pipe_crc->source));
+ 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));
+
errno = 0;
igt_assert_eq(write(pipe_crc->ctl_fd, buf, strlen(buf)), strlen(buf));
if (errno != 0)
return false;
+ if (!pipe_crc->is_legacy) {
+ sprintf(buf, "crtc-%d/crc/data", pipe_crc->pipe);
+ errno = 0;
+ if (pipe_crc->flags & CRC_NONBLOCK)
+ mode |= O_NONBLOCK;
+ pipe_crc->crc_fd = igt_debugfs_open(buf, mode);
+ if (pipe_crc->crc_fd == -1 && errno == EINVAL)
+ return false;
+ igt_assert_eq(errno, 0);
+ }
+
return true;
}
@@ -349,15 +368,38 @@ static void igt_pipe_crc_pipe_off(int fd, enum pipe pipe)
static void igt_pipe_crc_reset(void)
{
+ igt_debugfs_t *debugfs = __igt_debugfs_singleton();
int fd;
+ struct dirent *dirent;
+ char buf[128];
+ const char *cmd = "none";
+ DIR *dir;
fd = igt_debugfs_open("i915_display_crc_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);
+ }
- igt_pipe_crc_pipe_off(fd, PIPE_A);
- igt_pipe_crc_pipe_off(fd, PIPE_B);
- igt_pipe_crc_pipe_off(fd, PIPE_C);
+ dir = opendir(debugfs->dri_path);
+ if (dir) {
+ while ((dirent = readdir(dir))) {
+ if (strcmp(dirent->d_name, "crtc-") != 0)
+ continue;
- close(fd);
+ sprintf(buf, "%s/%s/crc/control", debugfs->dri_path,
+ dirent->d_name);
+ fd = open(buf, O_WRONLY);
+
+ igt_assert_eq(write(fd, cmd, strlen(cmd)), strlen(cmd));
+
+ close(fd);
+ }
+ closedir(dir);
+ }
}
static void pipe_crc_exit_handler(int sig)
@@ -379,13 +421,16 @@ void igt_require_pipe_crc(void)
size_t written;
int ret;
- ctl = igt_debugfs_fopen("i915_display_crc_ctl", "r+");
- igt_require_f(ctl,
- "No display_crc_ctl found, kernel too old\n");
- written = fwrite(cmd, 1, strlen(cmd), ctl);
- ret = fflush(ctl);
- igt_require_f((written == strlen(cmd) && ret == 0) || errno != ENODEV,
- "CRCs not supported on this platform\n");
+ ctl = igt_debugfs_fopen("crtc-0/crc/control", "r+");
+ if (!ctl) {
+ ctl = igt_debugfs_fopen("i915_display_crc_ctl", "r+");
+ igt_require_f(ctl,
+ "No display_crc_ctl found, kernel too old\n");
+ written = fwrite(cmd, 1, strlen(cmd), ctl);
+ ret = fflush(ctl);
+ igt_require_f((written == strlen(cmd) && ret == 0) || errno != ENODEV,
+ "CRCs not supported on this platform\n");
+ }
fclose(ctl);
}
@@ -395,20 +440,34 @@ pipe_crc_new(enum pipe pipe, enum intel_pipe_crc_source source, int flags)
{
igt_pipe_crc_t *pipe_crc;
char buf[128];
+ int mode = O_RDONLY;
igt_install_exit_handler(pipe_crc_exit_handler);
pipe_crc = calloc(1, sizeof(struct _igt_pipe_crc));
- pipe_crc->ctl_fd = igt_debugfs_open("i915_display_crc_ctl", O_WRONLY);
- igt_assert(pipe_crc->ctl_fd != -1);
+ if (!(flags & CRC_FORCE_LEGACY)) {
+ sprintf(buf, "crtc-%d/crc/control", pipe);
+ pipe_crc->ctl_fd = igt_debugfs_open(buf, O_WRONLY);
+ }
+
+ if (pipe_crc->ctl_fd == -1 || flags & CRC_FORCE_LEGACY) {
+ pipe_crc->ctl_fd = igt_debugfs_open("i915_display_crc_ctl",
+ O_WRONLY);
+ igt_assert(pipe_crc->ctl_fd != -1);
+ pipe_crc->is_legacy = true;
+ }
- sprintf(buf, "i915_pipe_%s_crc", kmstest_pipe_name(pipe));
- pipe_crc->crc_fd = igt_debugfs_open(buf, flags);
- igt_assert(pipe_crc->crc_fd != -1);
+ if (pipe_crc->is_legacy) {
+ sprintf(buf, "i915_pipe_%s_crc", kmstest_pipe_name(pipe));
+ if (flags & CRC_NONBLOCK)
+ mode |= O_NONBLOCK;
+ pipe_crc->crc_fd = igt_debugfs_open(buf, mode);
+ igt_assert(pipe_crc->crc_fd != -1);
+ } else {
+ pipe_crc->crc_fd = -1;
+ }
- pipe_crc->line_len = PIPE_CRC_LINE_LEN;
- pipe_crc->buffer_len = PIPE_CRC_BUFFER_LEN;
pipe_crc->pipe = pipe;
pipe_crc->source = source;
pipe_crc->flags = flags;
@@ -431,7 +490,7 @@ pipe_crc_new(enum pipe pipe, enum intel_pipe_crc_source source, int flags)
igt_pipe_crc_t *
igt_pipe_crc_new(enum pipe pipe, enum intel_pipe_crc_source source)
{
- return pipe_crc_new(pipe, source, O_RDONLY);
+ return pipe_crc_new(pipe, source, CRC_DEFAULTS);
}
/**
@@ -449,7 +508,43 @@ igt_pipe_crc_new(enum pipe pipe, enum intel_pipe_crc_source source)
igt_pipe_crc_t *
igt_pipe_crc_new_nonblock(enum pipe pipe, enum intel_pipe_crc_source source)
{
- return pipe_crc_new(pipe, source, O_RDONLY | O_NONBLOCK);
+ return pipe_crc_new(pipe, source, CRC_NONBLOCK);
+}
+
+/**
+ * igt_pipe_crc_new_legacy:
+ * @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. The old i915-specific ABI will be used.
+ *
+ * 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_legacy(enum pipe pipe,
+ enum intel_pipe_crc_source source)
+{
+ return pipe_crc_new(pipe, source, CRC_FORCE_LEGACY);
+}
+
+/**
+ * igt_pipe_crc_new_nonblock_legacy:
+ * @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. The old i915-specific ABI will be used.
+ *
+ * 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_legacy(enum pipe pipe,
+ enum intel_pipe_crc_source source)
+{
+ return pipe_crc_new(pipe, source, CRC_NONBLOCK | CRC_FORCE_LEGACY);
}
/**
@@ -468,34 +563,59 @@ void igt_pipe_crc_free(igt_pipe_crc_t *pipe_crc)
free(pipe_crc);
}
-static bool pipe_crc_init_from_string(igt_crc_t *crc, const char *line)
+static bool pipe_crc_init_from_string(igt_pipe_crc_t *pipe_crc, igt_crc_t *crc,
+ const char *line)
{
- int n;
+ 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 = 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;
+ 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[pipe_crc->buffer_len];
+ 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, pipe_crc->line_len);
+ 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);
+ igt_assert(pipe_crc->flags & CRC_NONBLOCK);
bytes_read = 0;
- } else {
- igt_assert_eq(bytes_read, pipe_crc->line_len);
}
buf[bytes_read] = '\0';
- if (bytes_read && !pipe_crc_init_from_string(out, buf))
+ if (bytes_read && !pipe_crc_init_from_string(pipe_crc, out, buf))
return -EINVAL;
return bytes_read;
@@ -519,15 +639,18 @@ void igt_pipe_crc_start(igt_pipe_crc_t *pipe_crc)
igt_assert(igt_pipe_crc_do_start(pipe_crc));
- /*
- * 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);
+ 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);
+ }
}
/**
@@ -540,8 +663,15 @@ void igt_pipe_crc_stop(igt_pipe_crc_t *pipe_crc)
{
char buf[32];
- sprintf(buf, "pipe %s none", kmstest_pipe_name(pipe_crc->pipe));
- igt_assert_eq(write(pipe_crc->ctl_fd, buf, strlen(buf)), strlen(buf));
+ 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;
+ }
}
/**
@@ -60,6 +60,7 @@ bool igt_debugfs_search(const char *filename, const char *substring);
*/
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
@@ -71,8 +72,9 @@ typedef struct _igt_pipe_crc igt_pipe_crc_t;
*/
typedef struct {
uint32_t frame;
+ bool has_valid_frame;
int n_words;
- uint32_t crc[5];
+ uint32_t crc[DRM_MAX_CRC_NR];
} igt_crc_t;
/**
@@ -117,6 +119,10 @@ igt_pipe_crc_t *
igt_pipe_crc_new(enum pipe pipe, enum intel_pipe_crc_source source);
igt_pipe_crc_t *
igt_pipe_crc_new_nonblock(enum pipe pipe, enum intel_pipe_crc_source source);
+igt_pipe_crc_t *
+igt_pipe_crc_new_legacy(enum pipe pipe, enum intel_pipe_crc_source source);
+igt_pipe_crc_t *
+igt_pipe_crc_new_nonblock_legacy(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);
@@ -58,10 +58,31 @@ static void test_bad_command(data_t *data, const char *cmd)
fclose(ctl);
}
+static void test_bad_source(data_t *data)
+{
+ FILE *f;
+ size_t written;
+ const char *source = "foo";
+
+ f = igt_debugfs_fopen("crtc-0/crc/control", "w");
+ igt_require(f);
+ written = fwrite(source, 1, strlen(source), f);
+ fflush(f);
+ igt_assert_eq(written, strlen(source));
+ igt_assert(!ferror(f));
+ igt_assert(!errno);
+ fclose(f);
+
+ f = igt_debugfs_fopen("crtc-0/crc/data", "w");
+ igt_assert(!f);
+ igt_assert_eq(errno, EINVAL);
+}
+
#define N_CRCS 3
#define TEST_SEQUENCE (1<<0)
#define TEST_NONBLOCK (1<<1)
+#define TEST_LEGACY (1<<2)
static int
test_read_crc_for_output(data_t *data, int pipe, igt_output_t *output,
@@ -104,10 +125,22 @@ test_read_crc_for_output(data_t *data, int pipe, igt_output_t *output,
igt_display_commit(display);
- if (flags & TEST_NONBLOCK)
- pipe_crc = igt_pipe_crc_new_nonblock(pipe, INTEL_PIPE_CRC_SOURCE_AUTO);
- else
- pipe_crc = igt_pipe_crc_new(pipe, INTEL_PIPE_CRC_SOURCE_AUTO);
+ if (flags & TEST_LEGACY) {
+ if (flags & TEST_NONBLOCK)
+ pipe_crc = igt_pipe_crc_new_nonblock_legacy(
+ pipe,
+ INTEL_PIPE_CRC_SOURCE_AUTO);
+ else
+ pipe_crc = igt_pipe_crc_new_legacy(pipe,
+ INTEL_PIPE_CRC_SOURCE_AUTO);
+ } else {
+ if (flags & TEST_NONBLOCK)
+ pipe_crc = igt_pipe_crc_new_nonblock(pipe,
+ INTEL_PIPE_CRC_SOURCE_AUTO);
+ else
+ pipe_crc = igt_pipe_crc_new(pipe,
+ INTEL_PIPE_CRC_SOURCE_AUTO);
+ }
igt_pipe_crc_start(pipe_crc);
@@ -143,9 +176,16 @@ test_read_crc_for_output(data_t *data, int pipe, igt_output_t *output,
for (j = 0; j < (n_crcs - 1); j++)
igt_assert_crc_equal(&crcs[j], &crcs[j + 1]);
- if (flags & TEST_SEQUENCE)
- for (j = 0; j < (n_crcs - 1); j++)
- igt_assert_eq(crcs[j].frame + 1, crcs[j + 1].frame);
+ if (flags & TEST_SEQUENCE) {
+ if (!crcs[0].has_valid_frame) {
+ igt_info("Skipping connector, its 'auto' source doesn't give us frame numbers.\n");
+ goto skip;
+ } else {
+ for (j = 0; j < (n_crcs - 1); j++)
+ igt_assert_eq(crcs[j].frame + 1,
+ crcs[j + 1].frame);
+ }
+ }
free(crcs);
igt_pipe_crc_free(pipe_crc);
@@ -156,6 +196,17 @@ test_read_crc_for_output(data_t *data, int pipe, igt_output_t *output,
}
return 1;
+
+skip:
+ if (crcs)
+ free(crcs);
+ igt_pipe_crc_free(pipe_crc);
+ igt_remove_fb(data->drm_fd, &data->fb);
+ igt_plane_set_fb(primary, NULL);
+
+ igt_output_set_pipe(output, PIPE_ANY);
+
+ return 0;
}
static void test_read_crc(data_t *data, int pipe, unsigned flags)
@@ -166,8 +217,10 @@ static void test_read_crc(data_t *data, int pipe, unsigned flags)
igt_skip_on(pipe >= data->display.n_pipes);
- for_each_connected_output(display, output) {
+ if (flags & TEST_LEGACY)
+ igt_require_intel(data->drm_fd);
+ for_each_connected_output(display, output) {
igt_info("%s: Testing connector %s using pipe %s\n",
igt_subtest_name(), igt_output_name(output),
kmstest_pipe_name(pipe));
@@ -178,6 +231,46 @@ static void test_read_crc(data_t *data, int pipe, unsigned flags)
igt_require_f(valid_connectors, "No connector found for pipe %i\n", pipe);
}
+static void test_read_crcs(data_t *data, unsigned flags)
+{
+ const char *postfix;
+
+ if (flags & TEST_LEGACY)
+ postfix = "-legacy";
+ else
+ postfix = "";
+
+ for (int i = 0; i < 3; i++) {
+ igt_subtest_f("read-crc-pipe-%c%s", 'A'+i, postfix)
+ test_read_crc(data, i, 0 | flags);
+
+ igt_subtest_f("read-crc-pipe-%c-frame-sequence%s", 'A'+i, postfix)
+ test_read_crc(data, i, TEST_SEQUENCE | flags);
+
+ igt_subtest_f("nonblocking-crc-pipe-%c%s", 'A'+i, postfix)
+ test_read_crc(data, i, TEST_NONBLOCK | flags);
+
+ igt_subtest_f("nonblocking-crc-pipe-%c-frame-sequence%s",
+ 'A'+i, postfix)
+ test_read_crc(data, i, TEST_SEQUENCE | TEST_NONBLOCK | flags);
+
+ igt_subtest_f("suspend-read-crc-pipe-%c%s", 'A'+i, postfix) {
+ igt_skip_on(i >= data->display.n_pipes);
+ igt_system_suspend_autoresume();
+
+ test_read_crc(data, i, flags);
+ }
+
+ igt_subtest_f("hang-read-crc-pipe-%c%s", 'A'+i, postfix) {
+ igt_hang_ring_t hang =
+ igt_hang_ring(data->drm_fd, I915_EXEC_RENDER);
+ test_read_crc(data, i, flags);
+ igt_post_hang_ring(data->drm_fd, hang);
+ test_read_crc(data, i, flags);
+ }
+ }
+}
+
data_t data = {0, };
igt_main
@@ -185,7 +278,7 @@ igt_main
igt_skip_on_simulation();
igt_fixture {
- data.drm_fd = drm_open_driver_master(DRIVER_INTEL);
+ data.drm_fd = drm_open_driver_master(DRIVER_ANY);
igt_enable_connectors();
@@ -196,47 +289,34 @@ igt_main
igt_display_init(&data.display, data.drm_fd);
}
- igt_subtest("bad-pipe")
+ igt_subtest("bad-source") {
+ test_bad_source(&data);
+ }
+
+ test_read_crcs(&data, 0);
+
+ igt_subtest("bad-pipe-legacy") {
+ igt_require_intel(data.drm_fd);
test_bad_command(&data, "pipe D none");
+ }
- igt_subtest("bad-source")
+ igt_subtest("bad-source-legacy") {
+ igt_require_intel(data.drm_fd);
test_bad_command(&data, "pipe A foo");
+ }
- igt_subtest("bad-nb-words-1")
+ igt_subtest("bad-nb-words-1-legacy") {
+ igt_require_intel(data.drm_fd);
test_bad_command(&data, "pipe foo");
+ }
- igt_subtest("bad-nb-words-3")
+ igt_subtest("bad-nb-words-3-legacy") {
+ igt_require_intel(data.drm_fd);
test_bad_command(&data, "pipe A none option");
-
- for (int i = 0; i < 3; i++) {
- igt_subtest_f("read-crc-pipe-%c", 'A'+i)
- test_read_crc(&data, i, 0);
-
- igt_subtest_f("read-crc-pipe-%c-frame-sequence", 'A'+i)
- test_read_crc(&data, i, TEST_SEQUENCE);
-
- igt_subtest_f("nonblocking-crc-pipe-%c", 'A'+i)
- test_read_crc(&data, i, TEST_NONBLOCK);
-
- igt_subtest_f("nonblocking-crc-pipe-%c-frame-sequence", 'A'+i)
- test_read_crc(&data, i, TEST_SEQUENCE | TEST_NONBLOCK);
-
- igt_subtest_f("suspend-read-crc-pipe-%c", 'A'+i) {
- igt_skip_on(i >= data.display.n_pipes);
- igt_system_suspend_autoresume();
-
- test_read_crc(&data, i, 0);
- }
-
- igt_subtest_f("hang-read-crc-pipe-%c", 'A'+i) {
- igt_hang_ring_t hang =
- igt_hang_ring(data.drm_fd, I915_EXEC_RENDER);
- test_read_crc(&data, i, 0);
- igt_post_hang_ring(data.drm_fd, hang);
- test_read_crc(&data, i, 0);
- }
}
+ test_read_crcs(&data, TEST_LEGACY);
+
igt_fixture {
igt_display_fini(&data.display);
}
The kernel has now a new debugfs ABI that can also allow capturing frame CRCs for drivers other than i915. Add alternative codepaths so the new ABI is used if the kernel is recent enough, and fall back to the legacy ABI if not. Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> --- lib/igt_debugfs.c | 236 +++++++++++++++++++++++++++++++++++---------- lib/igt_debugfs.h | 8 +- tests/kms_pipe_crc_basic.c | 162 +++++++++++++++++++++++-------- 3 files changed, 311 insertions(+), 95 deletions(-)