[PATCH 1/2] lib/igt_kms: add helpers for big joiner debugfs
Modem, Bhanuprakash
bhanuprakash.modem at intel.com
Wed Jan 17 18:16:30 UTC 2024
On 10-01-2024 05:09 pm, Kunal Joshi wrote:
> From: Swati Sharma <swati2.sharma at intel.com>
>
> Add helpers for big joiner debugfs.
>
> Signed-off-by: Swati Sharma <swati2.sharma at intel.com>
> Signed-off-by: Kunal Joshi <kunal1.joshi at intel.com>
> ---
> lib/igt_kms.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++
> lib/igt_kms.h | 3 +++
> 2 files changed, 78 insertions(+)
>
> diff --git a/lib/igt_kms.c b/lib/igt_kms.c
> index e4dea1a60..0208eccc4 100644
> --- a/lib/igt_kms.c
> +++ b/lib/igt_kms.c
> @@ -6368,3 +6368,78 @@ int get_num_scalers(int drm_fd, enum pipe pipe)
>
> return num_scalers;
> }
> +
> +static int write_bigjoiner_debugfs(int drmfd, char *connector_name, const char *file_name,
> + const char *write_buf)
IMHO, we need to drop this static function and move the logic to
igt_force_bigjoiner_enable()
> +{
> + int debugfs_fd = igt_debugfs_dir(drmfd);
> + int len = strlen(write_buf);
> + int ret;
> + char file_path[128] = {0};
> +
> + sprintf(file_path, "%s/%s", connector_name, file_name);
> +
> + ret = igt_sysfs_write(debugfs_fd, file_path, write_buf, len);
> +
> + close(debugfs_fd);
> +
> + if (ret > 0)
> + return 0;
> +
> + return ret;
> +}
> +
> +static bool check_bigjoiner_debugfs(int drmfd, char *connector_name,
> + const char *check_str)
we need to drop this static function and move the logic to
igt_is_force_bigjoiner_enabled()
> +{
> + char file_name[128] = {0};
> + char buf[512];
> +
> + sprintf(file_name, "%s/i915_bigjoiner_force_enable", connector_name);
> +
> + igt_debugfs_read(drmfd, file_name, buf);
> +
> + return strstr(buf, check_str);
> +}
> +
> +/**
> + * igt_is_force_bigjoiner_enabled:
> + * @drmfd: A drm file descriptor
> + * @connector_name: Name of the libdrm connector we're going to use
> + *
> + * Returns: True if Big Joiner is force enabled (via debugfs) for the given connector,
> + * false otherwise.
> + */
> +bool igt_is_force_bigjoiner_enabled(int drmfd, char *connector_name)
> +{
> + return check_bigjoiner_debugfs(drmfd, connector_name, "Bigjoiner enable: 1");
> +}
> +
> +/**
> + * igt_force_bigjoiner_enable:
> + * @drmfd: A drm file descriptor
> + * @connector_name: Name of the libdrm connector we're going to use
> + *
> + * Returns: 0 on success or negative error code, in case of failure.
> + */
> +int igt_force_bigjoiner_enable(int drmfd, char *connector_name, bool enable)
> +{
> + return write_bigjoiner_debugfs(drmfd, connector_name, "i915_bigjoiner_force_enable", enable ? "1" : "0");
> +}
> +
> +/**
> + * igt_get_bigjoiner_debugfs_fd:
Not understood the purpose of this helper.
igt_debugfs_connector_dir() will give the directory fd, then we can
perform igt_debugfs_simple_read() or igt_sysfs_write() with that fd.
- Bhanu
> + * @drmfd: A drm file descriptor
> + * @connector_name: Name of the libdrm connector we're going to use
> + *
> + * Returns: fd of the Big Joiner debugfs for the given connector,
> + * else returns -1.
> + */
> +int igt_get_bigjoiner_debugfs_fd(int drmfd, char *connector_name)
> +{
> + char file_name[128] = {0};
> +
> + sprintf(file_name, "%s/i915_bigjoiner_force_enable", connector_name);
> +
> + return openat(igt_debugfs_dir(drmfd), file_name, O_WRONLY);
> +}
> diff --git a/lib/igt_kms.h b/lib/igt_kms.h
> index b3882808b..2d000d54d 100644
> --- a/lib/igt_kms.h
> +++ b/lib/igt_kms.h
> @@ -1218,5 +1218,8 @@ bool intel_pipe_output_combo_valid(igt_display_t *display);
> bool igt_check_output_is_dp_mst(igt_output_t *output);
> int igt_get_dp_mst_connector_id(igt_output_t *output);
> int get_num_scalers(int drm_fd, enum pipe pipe);
> +bool igt_is_force_bigjoiner_enabled(int drmfd, char *connector_name);
> +int igt_force_bigjoiner_enable(int drmfd, char *connector_name, bool enable);
> +int igt_get_bigjoiner_debugfs_fd(int drmfd, char *connector_name);
>
> #endif /* __IGT_KMS_H__ */
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