From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 61AE9103A9AB for ; Wed, 25 Mar 2026 11:08:09 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 00F0C10E858; Wed, 25 Mar 2026 11:08:09 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="MbfV3OIi"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3AFD310E84F; Wed, 25 Mar 2026 11:08:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1774436888; x=1805972888; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=9aPgqiVhvvaZPNa3Vdfecb+N5uBatxo4I89E4/5v7+0=; b=MbfV3OIiWirkCQrTCHGcNIzhQq82c1AhqwxqUVVQRp3pkk5iDJzlDNvx 6DXN+boteocwEC/KLT+rCvhK39DSTMDwTGEA4vvrr8stncbfkbsm94A54 cMv7lRRGsCVyGTHP7gctJ8W4VLbISJfaELXuCwP7gIlKqRU/1oml/j3DA Bu5VUImu4tX/XVgLekQ1bIvTV5LUljDU5nn+qkwCPuKEOS1IEDhTJfcX/ 3+10nVjh7k8PBtDbkVyEDrmXCqFKYfYJAbyrj2PJa6wDNkOeSKTziPory xYVWnFErcHr3rBRFD+mBZ/D2gqCMKWOTABS8e62dmDA+wa9Oq3ee/R3if A==; X-CSE-ConnectionGUID: ztI6vQ/3RUabLvDphOauKg== X-CSE-MsgGUID: LwYKq0AzQgmrxKvtAHrw3g== X-IronPort-AV: E=McAfee;i="6800,10657,11739"; a="93047506" X-IronPort-AV: E=Sophos;i="6.23,140,1770624000"; d="scan'208";a="93047506" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Mar 2026 04:08:08 -0700 X-CSE-ConnectionGUID: xNSEzrToQ8ObSe1dCKyloQ== X-CSE-MsgGUID: jXEDQubfRD+VzuQqgvp+pA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,140,1770624000"; d="scan'208";a="219798342" Received: from kandpal-x299-ud4-pro.iind.intel.com ([10.190.239.10]) by fmviesa006.fm.intel.com with ESMTP; 25 Mar 2026 04:08:06 -0700 From: Suraj Kandpal To: intel-xe@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Cc: sowmiya.s@intel.com, uma.shankar@intel.com, swati2.sharma@intel.com, chaitanya.kumar.borah@intel.com, arun.r.murthy@intel.com, Suraj Kandpal Subject: [PATCH v3 07/26] drm/i915/writeback: Add hook to check modes Date: Wed, 25 Mar 2026 16:37:25 +0530 Message-Id: <20260325110744.1096786-8-suraj.kandpal@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260325110744.1096786-1-suraj.kandpal@intel.com> References: <20260325110744.1096786-1-suraj.kandpal@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Add connector helper hooks to check if mode is valid or not. We add this restriction to make sure mode is 3840x2160 60Hz. Signed-off-by: Suraj Kandpal --- .../gpu/drm/i915/display/intel_writeback.c | 20 +++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_writeback.c b/drivers/gpu/drm/i915/display/intel_writeback.c index 852951933348..765f62fa38f8 100644 --- a/drivers/gpu/drm/i915/display/intel_writeback.c +++ b/drivers/gpu/drm/i915/display/intel_writeback.c @@ -59,6 +59,25 @@ intel_writeback_connector_alloc(struct intel_connector *connector) return 0; } +static enum drm_mode_status +intel_writeback_mode_valid(struct drm_connector *_connector, + const struct drm_display_mode *mode) +{ + int refresh_rate; + + if (mode->hdisplay > 3840) + return MODE_H_ILLEGAL; + + if (mode->vdisplay > 2160) + return MODE_V_ILLEGAL; + + refresh_rate = drm_mode_vrefresh(mode); + if (refresh_rate > 60) + return MODE_BAD; + + return MODE_OK; +} + static int intel_writeback_get_modes(struct drm_connector *connector) { return drm_add_modes_noedid(connector, 3840, 2160); @@ -76,6 +95,7 @@ const struct drm_connector_funcs conn_funcs = { static const struct drm_connector_helper_funcs conn_helper_funcs = { .get_modes = intel_writeback_get_modes, + .mode_valid = intel_writeback_mode_valid, }; int intel_writeback_init(struct intel_display *display) -- 2.34.1