From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9178110E056 for ; Thu, 16 Nov 2023 05:01:13 +0000 (UTC) From: Bhanuprakash Modem To: igt-dev@lists.freedesktop.org Date: Thu, 16 Nov 2023 10:21:13 +0530 Message-Id: <20231116045113.1590173-2-bhanuprakash.modem@intel.com> In-Reply-To: <20231116045113.1590173-1-bhanuprakash.modem@intel.com> References: <20231116045113.1590173-1-bhanuprakash.modem@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [igt-dev] [i-g-t V3 2/2] lib/igt_kms: Read max dotclock info from i915_cdclk_info only List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: igt-dev-bounces@lists.freedesktop.org Sender: "igt-dev" List-ID: If fail to read 'i915_cdclk_info' debugfs, simply return max dotclock as 0, and no need to fallback to read from 'i915_frequency_info'. Cc: Ville Syrjälä Signed-off-by: Bhanuprakash Modem --- lib/igt_kms.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) diff --git a/lib/igt_kms.c b/lib/igt_kms.c index b2208ac54..13bb58dbd 100644 --- a/lib/igt_kms.c +++ b/lib/igt_kms.c @@ -6046,7 +6046,7 @@ bool igt_max_bpc_constraint(igt_display_t *display, enum pipe pipe, * @fd: A drm file descriptor * * Get the Max pixel clock frequency from intel specific debugfs - * "i915_frequency_info". + * "i915_cdclk_info". * * Returns: Max supported pixel clock frequency. */ @@ -6070,19 +6070,12 @@ int igt_get_max_dotclock(int fd) dir = igt_debugfs_dir(fd); igt_require(dir); - /* - * Display specific clock frequency info is moved to i915_cdclk_info, - * On older kernels if this debugfs is not found, fallback to read from - * i915_frequency_info. - */ res = igt_debugfs_simple_read(dir, "i915_cdclk_info", buf, sizeof(buf)); - if (res <= 0) - res = igt_debugfs_simple_read(dir, "i915_frequency_info", - buf, sizeof(buf)); close(dir); - igt_require(res > 0); + if (res <= 0) + return max_dotclock; igt_assert(s = strstr(buf, "Max pixel clock frequency:")); igt_assert_eq(sscanf(s, "Max pixel clock frequency: %d kHz", &max_dotclock), 1); -- 2.40.0