From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0B55A47791; Mon, 8 Jan 2024 15:10:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ZEgb6dNs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 512BDC433C7; Mon, 8 Jan 2024 15:10:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1704726618; bh=N0QgM6qohhDyIDzK8puCCPNX8CTTWkGfENMPFBVbImk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZEgb6dNsH7cLj3/imPq1cn21nEie/gCHDUibH89RCCuQLvEsGc+bIT+A5aP2jwM/S WvbyPoyk1jaEnh9zwPg5rv/JxPuRTDV6IQiXrjwJ/EqprrmCWqp+EQd1JbRaWZNhcC Go8eePN5JsgAH9SJzAvrCgFZ4QfA0RshKsqjlP88= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Daniel Wheeler , Jerry Zuo , Rodrigo Siqueira , Wade Wang , Wayne Lin , Alex Deucher Subject: [PATCH 6.6 008/124] drm/amd/display: pbn_div need be updated for hotplug event Date: Mon, 8 Jan 2024 16:07:14 +0100 Message-ID: <20240108150603.347576028@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240108150602.976232871@linuxfoundation.org> References: <20240108150602.976232871@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Wayne Lin commit 9cdef4f720376ef0fb0febce1ed2377c19e531f9 upstream. link_rate sometime will be changed when DP MST connector hotplug, so pbn_div also need be updated; otherwise, it will mismatch with link_rate, causes no output in external monitor. This is a backport to 6.7 and older. Cc: stable@vger.kernel.org Tested-by: Daniel Wheeler Reviewed-by: Jerry Zuo Acked-by: Rodrigo Siqueira Signed-off-by: Wade Wang Signed-off-by: Wayne Lin Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -6868,8 +6868,7 @@ static int dm_encoder_helper_atomic_chec if (IS_ERR(mst_state)) return PTR_ERR(mst_state); - if (!mst_state->pbn_div) - mst_state->pbn_div = dm_mst_get_pbn_divider(aconnector->mst_root->dc_link); + mst_state->pbn_div = dm_mst_get_pbn_divider(aconnector->mst_root->dc_link); if (!state->duplicated) { int max_bpc = conn_state->max_requested_bpc;