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d="scan'208";a="85488281" Received: from kunal-x299-aorus-gaming-3-pro.iind.intel.com ([10.190.239.13]) by fmviesa002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Aug 2024 11:02:29 -0700 From: Kunal Joshi To: igt-dev@lists.freedesktop.org Cc: Kunal Joshi Subject: [PATCH i-g-t 02/14] lib/igt_kms: add helper to get current link rate/ lane count for connector Date: Sun, 25 Aug 2024 23:44:12 +0530 Message-Id: <20240825181424.4034541-3-kunal1.joshi@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240825181424.4034541-1-kunal1.joshi@intel.com> References: <20240825181424.4034541-1-kunal1.joshi@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: igt-dev@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development mailing list for IGT GPU Tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: igt-dev-bounces@lists.freedesktop.org Sender: "igt-dev" i915_dp_force_(lane_count/link_rate) debugfs files expoose current link rate/lane count for connector.add helper to get current link rate/ lane count for connector Signed-off-by: Kunal Joshi --- lib/igt_kms.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++ lib/igt_kms.h | 2 ++ 2 files changed, 60 insertions(+) diff --git a/lib/igt_kms.c b/lib/igt_kms.c index dd530dbab..4ef7f4d7f 100644 --- a/lib/igt_kms.c +++ b/lib/igt_kms.c @@ -6705,3 +6705,61 @@ int get_num_scalers(igt_display_t *display, enum pipe pipe) return num_scalers; } + +/** + * igt_get_dp_link_rate_set_for_output: + * @drm_fd: A drm file descriptor + * @output: Target output + * + * Returns: Link rate set for the output. + */ +enum dp_link_rate igt_get_dp_link_rate_set_for_output(int drm_fd, igt_output_t *output) +{ + char buf[512]; + int dir, res; + int link_rate; + + igt_require_f(output->name, "Invalid output"); + dir = igt_debugfs_connector_dir(drm_fd, output->name, O_RDONLY); + igt_assert_f(dir >= 0, "Failed to open debugfs dir for connector %s\n", + igt_output_name(output)); + res = igt_debugfs_simple_read(dir, "i915_dp_force_link_rate", buf, sizeof(buf)); + close(dir); + igt_require(res > 0); + + if (strstr(buf, "[auto]")) + igt_assert(sscanf(strstr(buf, "*") - 6, "%d", &link_rate) == 1); + else + igt_assert(sscanf(strstr(buf, "[") + 1, "%d", &link_rate) == 1); + + return link_rate; +} + +/** + * igt_get_dp_lane_count_set_for_output: + * @drm_fd: A drm file descriptor + * @output: Target output + * + * Returns: Lane count set for the output. + */ +enum dp_lane_count igt_get_dp_lane_count_set_for_output(int drm_fd, igt_output_t *output) +{ + char buf[512]; + int dir, res; + int lane_count; + + igt_require_f(output->name, "Invalid output"); + dir = igt_debugfs_connector_dir(drm_fd, output->name, O_RDONLY); + igt_assert_f(dir >= 0, "Failed to open debugfs dir for connector %s\n", + igt_output_name(output)); + res = igt_debugfs_simple_read(dir, "i915_dp_force_lane_count", buf, sizeof(buf)); + close(dir); + igt_require(res > 0); + + if (strstr(buf, "[auto]")) + igt_assert(sscanf(strstr(buf, "*") - 2, "%d", &lane_count) == 1); + else + igt_assert(sscanf(strstr(buf, "[") + 1, "%d", &lane_count) == 1); + + return lane_count; +} diff --git a/lib/igt_kms.h b/lib/igt_kms.h index 999921f9f..9d42a2b35 100644 --- a/lib/igt_kms.h +++ b/lib/igt_kms.h @@ -1247,5 +1247,7 @@ 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(igt_display_t *display, enum pipe pipe); +enum dp_link_rate igt_get_dp_link_rate_set_for_output(int drm_fd, igt_output_t *output); +enum dp_lane_count igt_get_dp_lane_count_set_for_output(int drm_fd, igt_output_t *output); #endif /* __IGT_KMS_H__ */ -- 2.43.0