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 BF730157E6A; Mon, 29 Jan 2024 17:11:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706548293; cv=none; b=ns4m8yn7FkrEBjHawVKRfQOaZFMQz091LlfIglGEGIaqSa8vNsvr9MVpi/Y1MqPjN+q2/MlGaI6nwzO2xFQms/AjOi/dRsF+U+i3OcNwy5OTlioqfUOFaRzKQJpkz1FtHETxM4rgauGvMgJA+HLWeq0w+g0UrAL6nOlKeGCtn4o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706548293; c=relaxed/simple; bh=zcf5lCtaWQz/HFDhvJJ97VH2N25ohuJzxjLjYCdxJas=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=rxd3nYsswhUxM5neFLq6LcJQXVAjHelh69UGlbyE+kJUakAzd6ap9itwccSpLEyngaLByp/4NK5djbVeSCgbucfpCTRGFJxIEQKvM0n9iK2FtmOOlb73hlglFiS8L8S9m2PINGryTyXuQWCVOlBtEIpmtyN71GsRw1ohxzAf7yQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=xA8XlH4O; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="xA8XlH4O" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 89A86C433A6; Mon, 29 Jan 2024 17:11:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1706548293; bh=zcf5lCtaWQz/HFDhvJJ97VH2N25ohuJzxjLjYCdxJas=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xA8XlH4O9SlfwmOOHri4V781sVJRhoAMsL3zuLiyZmwaMl4SgAmGEkpFQuuYpkahf cBiOBlUhL8zG4cUKpl295uzRJmNxqVuxpAzMEkpKwR+C0eIEudWnDOWVh1bSfL04Ca WOQZLKhPB0nxyvlXaYWX2l5OZicHQEmu24MnUwxQ= 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 6.1 075/185] drm/amd/display: pbn_div need be updated for hotplug event Date: Mon, 29 Jan 2024 09:04:35 -0800 Message-ID: <20240129170001.013123430@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240129165958.589924174@linuxfoundation.org> References: <20240129165958.589924174@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-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 @@ -6677,8 +6677,7 @@ 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_port->dc_link); + mst_state->pbn_div = dm_mst_get_pbn_divider(aconnector->mst_port->dc_link); if (!state->duplicated) { int max_bpc = conn_state->max_requested_bpc;