On Fri, Dec 06, 2013 at 10:48:43AM +0100, Daniel Vetter wrote:
> No need to duplicate this all over the place.
> 
> Signed-off-by: Daniel Vetter <daniel.vet...@ffwll.ch>

(note that the use of buffered fopen/fwrite operations and the need to
flush the internal buffer could be just replaced with raw open/write and
was a left over from the initial implementation, but who cares).

Reviewed-by: Damien Lespiau <damien.lesp...@intel.com>

> ---
>  lib/igt_debugfs.c          | 18 ++++++++++++++++++
>  lib/igt_debugfs.h          |  1 +
>  tests/kms_cursor_crc.c     | 18 ++----------------
>  tests/kms_fbc_crc.c        | 14 +-------------
>  tests/kms_pipe_crc_basic.c | 25 ++++++++-----------------
>  5 files changed, 30 insertions(+), 46 deletions(-)
> 
> diff --git a/lib/igt_debugfs.c b/lib/igt_debugfs.c
> index 1ceaf59db11f..139be893f75b 100644
> --- a/lib/igt_debugfs.c
> +++ b/lib/igt_debugfs.c
> @@ -205,6 +205,24 @@ static void pipe_crc_exit_handler(int sig)
>       igt_pipe_crc_reset();
>  }
>  
> +void igt_pipe_crc_check(igt_debugfs_t *debugfs)
> +{
> +     const char *cmd = "pipe A none";
> +     FILE *ctl;
> +     size_t written;
> +     int ret;
> +
> +     ctl = igt_debugfs_fopen(debugfs, "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);
> +}
> +
>  igt_pipe_crc_t *
>  igt_pipe_crc_new(igt_debugfs_t *debugfs, int drm_fd, enum pipe pipe,
>                enum intel_pipe_crc_source source)
> diff --git a/lib/igt_debugfs.h b/lib/igt_debugfs.h
> index 40d9d28fd49b..393b5767adbe 100644
> --- a/lib/igt_debugfs.h
> +++ b/lib/igt_debugfs.h
> @@ -70,6 +70,7 @@ bool igt_crc_is_null(igt_crc_t *crc);
>  bool igt_crc_equal(igt_crc_t *a, igt_crc_t *b);
>  char *igt_crc_to_string(igt_crc_t *crc);
>  
> +void igt_pipe_crc_check(igt_debugfs_t *debugfs);
>  igt_pipe_crc_t *
>  igt_pipe_crc_new(igt_debugfs_t *debugfs, int drm_fd, enum pipe pipe,
>                enum intel_pipe_crc_source source);
> diff --git a/tests/kms_cursor_crc.c b/tests/kms_cursor_crc.c
> index b78ea7863585..d80695f67e2f 100644
> --- a/tests/kms_cursor_crc.c
> +++ b/tests/kms_cursor_crc.c
> @@ -53,7 +53,6 @@ typedef struct {
>       int drm_fd;
>       igt_debugfs_t debugfs;
>       drmModeRes *resources;
> -     FILE *ctl;
>       uint32_t fb_id[NUM_CURSOR_TYPES];
>       struct kmstest_fb fb[NUM_CURSOR_TYPES];
>       igt_pipe_crc_t **pipe_crc;
> @@ -333,23 +332,12 @@ igt_main
>       igt_skip_on_simulation();
>  
>       igt_fixture {
> -             size_t written;
> -             int ret;
> -             const char *cmd = "pipe A none";
> -
>               data.drm_fd = drm_open_any();
>  
>               igt_set_vt_graphics_mode();
>  
>               igt_debugfs_init(&data.debugfs);
> -             data.ctl = igt_debugfs_fopen(&data.debugfs,
> -                                          "i915_display_crc_ctl", "r+");
> -             igt_require_f(data.ctl,
> -                           "No display_crc_ctl found, kernel too old\n");
> -             written = fwrite(cmd, 1, strlen(cmd), data.ctl);
> -             ret = fflush(data.ctl);
> -             igt_require_f((written == strlen(cmd) && ret == 0) || errno != 
> ENODEV,
> -                           "CRCs not supported on this platform\n");
> +             igt_pipe_crc_check(&data.debugfs);
>  
>               display_init(&data);
>  
> @@ -376,8 +364,6 @@ igt_main
>       igt_subtest("cursor-black-invisible-offscreen")
>               run_test(&data, BLACK_INVISIBLE, false);
>  
> -     igt_fixture {
> +     igt_fixture
>               display_fini(&data);
> -             fclose(data.ctl);
> -     }
>  }
> diff --git a/tests/kms_fbc_crc.c b/tests/kms_fbc_crc.c
> index 7a7f3903667b..4cddd27428d0 100644
> --- a/tests/kms_fbc_crc.c
> +++ b/tests/kms_fbc_crc.c
> @@ -60,7 +60,6 @@ typedef struct {
>       int drm_fd;
>       igt_debugfs_t debugfs;
>       drmModeRes *resources;
> -     FILE *ctl;
>       igt_crc_t ref_crc[2];
>       igt_pipe_crc_t **pipe_crc;
>       drm_intel_bufmgr *bufmgr;
> @@ -485,9 +484,6 @@ igt_main
>       igt_skip_on_simulation();
>  
>       igt_fixture {
> -             size_t written;
> -             int ret;
> -             const char *cmd = "pipe A none";
>               char buf[64];
>               FILE *status;
>  
> @@ -497,14 +493,7 @@ igt_main
>               data.devid = intel_get_drm_devid(data.drm_fd);
>  
>               igt_debugfs_init(&data.debugfs);
> -             data.ctl = igt_debugfs_fopen(&data.debugfs,
> -                                          "i915_display_crc_ctl", "r+");
> -             igt_require_f(data.ctl,
> -                           "No display_crc_ctl found, kernel too old\n");
> -             written = fwrite(cmd, 1, strlen(cmd), data.ctl);
> -             ret = fflush(data.ctl);
> -             igt_require_f((written == strlen(cmd) && ret == 0) || errno != 
> ENODEV,
> -                           "CRCs not supported on this platform\n");
> +             igt_pipe_crc_check(&data.debugfs);
>  
>               status = igt_debugfs_fopen(&data.debugfs, "i915_fbc_status", 
> "r");
>               igt_require_f(status, "No i915_fbc_status found\n");
> @@ -532,6 +521,5 @@ igt_main
>       igt_fixture {
>               drm_intel_bufmgr_destroy(data.bufmgr);
>               display_fini(&data);
> -             fclose(data.ctl);
>       }
>  }
> diff --git a/tests/kms_pipe_crc_basic.c b/tests/kms_pipe_crc_basic.c
> index 0e793cdf617d..90d9b9404877 100644
> --- a/tests/kms_pipe_crc_basic.c
> +++ b/tests/kms_pipe_crc_basic.c
> @@ -45,18 +45,21 @@ typedef struct {
>       drmModeRes *resources;
>       int n_connectors;
>       connector_t *connectors;
> -     FILE *ctl;
>  } data_t;
>  
>  static void test_bad_command(data_t *data, const char *cmd)
>  {
> +     FILE *ctl;
>       size_t written;
>  
> -     written = fwrite(cmd, 1, strlen(cmd), data->ctl);
> -     fflush(data->ctl);
> +     ctl = igt_debugfs_fopen(&data->debugfs, "i915_display_crc_ctl", "r+");
> +     written = fwrite(cmd, 1, strlen(cmd), ctl);
> +     fflush(ctl);
>       igt_assert_cmpint(written, ==, (strlen(cmd)));
> -     igt_assert(ferror(data->ctl));
> +     igt_assert(ferror(ctl));
>       igt_assert_cmpint(errno, ==, EINVAL);
> +
> +     fclose(ctl);
>  }
>  
>  static void connector_init(data_t *data, connector_t *connector,
> @@ -214,10 +217,6 @@ igt_main
>       igt_skip_on_simulation();
>  
>       igt_fixture {
> -             size_t written;
> -             int ret;
> -             const char *cmd = "pipe A none";
> -
>               data.drm_fd = drm_open_any();
>  
>               igt_set_vt_graphics_mode();
> @@ -225,14 +224,7 @@ igt_main
>               display_init(&data);
>  
>               igt_debugfs_init(&data.debugfs);
> -             data.ctl = igt_debugfs_fopen(&data.debugfs,
> -                                          "i915_display_crc_ctl", "r+");
> -             igt_require_f(data.ctl,
> -                           "No display_crc_ctl found, kernel too old\n");
> -             written = fwrite(cmd, 1, strlen(cmd), data.ctl);
> -             ret = fflush(data.ctl);
> -             igt_require_f((written == strlen(cmd) && ret == 0) || errno != 
> ENODEV,
> -                           "CRCs not supported on this platform\n");
> +             igt_pipe_crc_check(&data.debugfs);
>       }
>  
>       igt_subtest("bad-pipe")
> @@ -257,6 +249,5 @@ igt_main
>  
>       igt_fixture {
>               display_fini(&data);
> -             fclose(data.ctl);
>       }
>  }
> -- 
> 1.8.4.3
> 
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