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client-ip=165.204.84.17; helo=satlexmb07.amd.com; pr=C Received: from satlexmb07.amd.com (165.204.84.17) by BN3PEPF0000B077.mail.protection.outlook.com (10.167.243.122) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9564.3 via Frontend Transport; Fri, 23 Jan 2026 11:12:54 +0000 Received: from vijendar-linux.amd.com (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Fri, 23 Jan 2026 05:12:51 -0600 From: Vijendar Mukunda To: CC: , , , , , , , Vijendar Mukunda Subject: [PATCH V3 2/2] soundwire: amd: refactor bandwidth calculation logic Date: Fri, 23 Jan 2026 16:41:32 +0530 Message-ID: <20260123111233.3649153-3-Vijendar.Mukunda@amd.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20260123111233.3649153-1-Vijendar.Mukunda@amd.com> References: <20260123111233.3649153-1-Vijendar.Mukunda@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: satlexmb08.amd.com (10.181.42.217) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN3PEPF0000B077:EE_|SN7PR12MB6714:EE_ X-MS-Office365-Filtering-Correlation-Id: 79f952af-9fb3-4143-c075-08de5a705b1d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|1800799024|82310400026|376014; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Jan 2026 11:12:54.4275 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 79f952af-9fb3-4143-c075-08de5a705b1d X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN3PEPF0000B077.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB6714 Content-Type: text/plain; charset="utf-8" For current platforms(ACP6.3/ACP7.0/ACP7.1/ACP7.2), AMD SoundWire manager doesn't have banked registers for data port programming on Manager's side. Need to use fixed block offsets, hstart & hstop for manager ports. Earlier amd manager driver has support for 12MHz as a bus clock frequency with frame size as 50 x 10 with fixed block offset mapping based on port number. Got a requirement to support 6MHz bus clock frequency with different frame shapes 50 x 10 and 125 x 2. For current platforms, amd manager driver supports only two bus clock frequencies(12MHz & 6MHz). Refactor bandwidth logic to support different bus clock frequencies. Signed-off-by: Vijendar Mukunda --- drivers/soundwire/amd_manager.c | 57 ++++++++++++++++++++++++++++--- include/linux/soundwire/sdw_amd.h | 4 +++ 2 files changed, 57 insertions(+), 4 deletions(-) diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manage= r.c index ee3c37a5a48b..954e3cb3286f 100644 --- a/drivers/soundwire/amd_manager.c +++ b/drivers/soundwire/amd_manager.c @@ -480,12 +480,16 @@ static u32 amd_sdw_read_ping_status(struct sdw_bus *b= us) =20 static int amd_sdw_compute_params(struct sdw_bus *bus, struct sdw_stream_r= untime *stream) { + struct amd_sdw_manager *amd_manager =3D to_amd_sdw(bus); struct sdw_transport_data t_data =3D {0}; struct sdw_master_runtime *m_rt; struct sdw_port_runtime *p_rt; struct sdw_bus_params *b_params =3D &bus->params; int port_bo, hstart, hstop, sample_int; - unsigned int rate, bps; + unsigned int rate, bps, channels; + int stream_slot_size, max_slots; + static int next_offset[AMD_SDW_MAX_MANAGER_COUNT] =3D {1}; + unsigned int inst_id =3D amd_manager->instance; =20 port_bo =3D 0; hstart =3D 1; @@ -496,11 +500,51 @@ static int amd_sdw_compute_params(struct sdw_bus *bus= , struct sdw_stream_runtime list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) { rate =3D m_rt->stream->params.rate; bps =3D m_rt->stream->params.bps; + channels =3D m_rt->stream->params.ch_count; sample_int =3D (bus->params.curr_dr_freq / rate); + + /* Compute slots required for this stream dynamically */ + stream_slot_size =3D bps * channels; + list_for_each_entry(p_rt, &m_rt->port_list, port_node) { - port_bo =3D (p_rt->num * 64) + 1; - dev_dbg(bus->dev, "p_rt->num=3D%d hstart=3D%d hstop=3D%d port_bo=3D%d\n= ", - p_rt->num, hstart, hstop, port_bo); + if (p_rt->num >=3D amd_manager->max_ports) { + dev_err(bus->dev, "Port %d exceeds max ports %d\n", + p_rt->num, amd_manager->max_ports); + return -EINVAL; + } + + if (!amd_manager->port_offset_map[p_rt->num]) { + /* + * port block offset calculation for 6MHz bus clock frequency with + * different frame sizes 50 x 10 and 125 x 2 + */ + if (bus->params.curr_dr_freq =3D=3D 12000000) { + max_slots =3D bus->params.row * (bus->params.col - 1); + if (next_offset[inst_id] + stream_slot_size <=3D + (max_slots - 1)) { + amd_manager->port_offset_map[p_rt->num] =3D + next_offset[inst_id]; + next_offset[inst_id] +=3D stream_slot_size; + } else { + dev_err(bus->dev, + "No space for port %d\n", p_rt->num); + return -ENOMEM; + } + } else { + /* + * port block offset calculation for 12MHz bus clock + * frequency + */ + amd_manager->port_offset_map[p_rt->num] =3D + (p_rt->num * 64) + 1; + } + } + port_bo =3D amd_manager->port_offset_map[p_rt->num]; + dev_dbg(bus->dev, + "Port=3D%d hstart=3D%d hstop=3D%d port_bo=3D%d slots=3D%d max_ports=3D= %d\n", + p_rt->num, hstart, hstop, port_bo, stream_slot_size, + amd_manager->max_ports); + sdw_fill_xport_params(&p_rt->transport_params, p_rt->num, false, SDW_BLK_GRP_CNT_1, sample_int, port_bo, port_bo >> 8, hstart, hstop, @@ -1093,6 +1137,11 @@ static int amd_sdw_manager_probe(struct platform_dev= ice *pdev) default: return -EINVAL; } + amd_manager->max_ports =3D amd_manager->num_dout_ports + amd_manager->num= _din_ports; + amd_manager->port_offset_map =3D devm_kcalloc(dev, amd_manager->max_ports, + sizeof(int), GFP_KERNEL); + if (!amd_manager->port_offset_map) + return -ENOMEM; =20 prop =3D &amd_manager->bus.prop; prop->mclk_freq =3D AMD_SDW_BUS_BASE_FREQ; diff --git a/include/linux/soundwire/sdw_amd.h b/include/linux/soundwire/sd= w_amd.h index fe31773d5210..470360a2723c 100644 --- a/include/linux/soundwire/sdw_amd.h +++ b/include/linux/soundwire/sdw_amd.h @@ -66,8 +66,10 @@ struct sdw_amd_dai_runtime { * @status: peripheral devices status array * @num_din_ports: number of input ports * @num_dout_ports: number of output ports + * @max_ports: total number of input ports and output ports * @cols_index: Column index in frame shape * @rows_index: Rows index in frame shape + * @port_offset_map: dynamic array to map port block offset * @instance: SoundWire manager instance * @quirks: SoundWire manager quirks * @wake_en_mask: wake enable mask per SoundWire manager @@ -92,10 +94,12 @@ struct amd_sdw_manager { =20 int num_din_ports; int num_dout_ports; + int max_ports; =20 int cols_index; int rows_index; =20 + int *port_offset_map; u32 instance; u32 quirks; u32 wake_en_mask; --=20 2.45.2