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X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Jan 2026 09:54:19.8807 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4fa4bc70-ae6a-4cd4-c245-08de54e5382f X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.23.194];Helo=[lewvzet200.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF00022570.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR10MB4767 Content-Type: text/plain; charset="utf-8" TI's AM62P SoC contains two instances of the TI Keystone Display SubSystem (DSS), each with two video ports and two video planes. These instances support up to three independent video streams through OLDI, DPI, and DSI interfaces. The OLDI interfaces utilizes two OLDI transmitters OLDI0 and OLDI1. DSS0 (first instance) supports: - With respect to OLDI Tx interfaces, DSS0 instance can either drive both OLDI0 Tx and OLDI1 Tx together (e.g. dual link mode or clone mode) or can only drive OLDI0 Tx in single link mode with OLDI1 being utilized by DSS1 or left unused. - DPI output from video port 2. DSS1 (second instance) supports: - With respect to OLDI Tx interfaces, DSS1 instance can only drive OLDI1 Tx given DSS0 is not utilizing that as described above. - DSI controller output from video port 2. The two OLDI transmitters can be configured in clone mode to drive a pair of identical OLDI single-link displays. DPI outputs from DSS0 VP2, DSS1 VP1, and DSS1 VP2 are multiplexed, allowing only one DPI output at a time. Add the compatible string "ti,am62p-dss" and update related description accordingly. AM62P has different power domains for DSS and OLDI compared to other Keystone SoCs. DSS0 can have up to 3 power-domains for DSS0, OLDI0 and OLDI1, and DSS1 can have up to 2 power-domains for DSS1 and OLDI1. Signed-off-by: Swamil Jain --- .../bindings/display/ti/ti,am65x-dss.yaml | 37 ++++++++++++++++++- 1 file changed, 35 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml= b/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml index 38fcee91211e..b1cec5383160 100644 --- a/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml +++ b/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml @@ -24,6 +24,19 @@ description: | DPI signals are also routed internally to DSI Tx controller present with= in the SoC. Due to clocking limitations only one of the interface i.e. either D= SI or DPI can be used at once. + The AM62P has two instances of TI Keystone Display SubSystem, each with = two + video ports and two video planes. These instances can support up to 3 + independent video streams through OLDI, DPI, and DSI interfaces. + DSS0 (first instance) supports: + - Two OLDI TXes on video port 1, configurable in dual-link or + single link clone mode + - DPI output on video port 2 + DSS1 (second instance) supports: + - One OLDI TX on video port 1 (single-link mode only) + - DSI controller output on video port 2 + The two OLDI TXes can be configured in clone mode to drive a pair of + identical OLDI single-link displays. DPI outputs from DSS0 VP2, DSS1 VP1, + and DSS1 VP2 are muxed, allowing only one DPI output at a time. =20 properties: compatible: @@ -31,6 +44,7 @@ properties: - ti,am625-dss - ti,am62a7-dss - ti,am62l-dss + - ti,am62p-dss - ti,am65x-dss =20 reg: @@ -81,8 +95,13 @@ properties: maxItems: 1 =20 power-domains: - maxItems: 1 - description: phandle to the associated power domain + minItems: 1 + description: + phandle to the associated power domain(s). + items: + - description: DSS controller power domain + - description: OLDI0 power domain + - description: OLDI1 power domain =20 dma-coherent: true =20 @@ -196,6 +215,20 @@ allOf: properties: endpoint@1: false =20 + - if: + properties: + compatible: + contains: + const: ti,am62p-dss + then: + properties: + power-domains: + maxItems: 3 + else: + properties: + power-domains: + maxItems: 1 + required: - compatible - reg From nobody Sat Feb 7 06:21:21 2026 Received: from CO1PR03CU002.outbound.protection.outlook.com (mail-westus2azhn15010053.outbound.protection.outlook.com [52.102.136.53]) (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 02CF435E552; 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X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Jan 2026 09:54:26.0724 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7983504b-1778-42df-9e1b-08de54e53bd9 X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.21.195];Helo=[flwvzet201.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF00003AE5.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM3PR10MB7911 Content-Type: text/plain; charset="utf-8" From: Devarsh Thakkar Some SoC's such as AM62P have dedicated power domains for OLDI which need to be powered on separately along with display controller. So during driver probe, power up all attached PM domains enumerated in devicetree node for DSS. This also prepares base to add display support for AM62P. Tested-by: Michael Walle Signed-off-by: Devarsh Thakkar [j-choudhary@ti.com: fix PM call sequence causing kernel crash in OLDI] Signed-off-by: Jayesh Choudhary Signed-off-by: Swamil Jain Reviewed-by: Tomi Valkeinen --- drivers/gpu/drm/tidss/tidss_drv.c | 82 +++++++++++++++++++++++++++++-- drivers/gpu/drm/tidss/tidss_drv.h | 4 ++ 2 files changed, 82 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/tidss/tidss_drv.c b/drivers/gpu/drm/tidss/tids= s_drv.c index 1c8cc18bc53c..93e0c34c73aa 100644 --- a/drivers/gpu/drm/tidss/tidss_drv.c +++ b/drivers/gpu/drm/tidss/tidss_drv.c @@ -8,6 +8,7 @@ #include #include #include +#include #include =20 #include @@ -107,6 +108,68 @@ static const struct drm_driver tidss_driver =3D { .minor =3D 0, }; =20 +static void tidss_detach_pm_domains(struct tidss_device *tidss) +{ + int i; + + if (tidss->num_domains <=3D 1) + return; + + for (i =3D 0; i < tidss->num_domains; i++) { + if (!IS_ERR_OR_NULL(tidss->pd_link[i])) + device_link_del(tidss->pd_link[i]); + if (!IS_ERR_OR_NULL(tidss->pd_dev[i])) + dev_pm_domain_detach(tidss->pd_dev[i], true); + tidss->pd_dev[i] =3D NULL; + tidss->pd_link[i] =3D NULL; + } +} + +static int tidss_attach_pm_domains(struct tidss_device *tidss) +{ + struct device *dev =3D tidss->dev; + int i; + int ret; + struct platform_device *pdev =3D to_platform_device(dev); + struct device_node *np =3D pdev->dev.of_node; + + tidss->num_domains =3D of_count_phandle_with_args(np, "power-domains", + "#power-domain-cells"); + if (tidss->num_domains <=3D 1) + return 0; + + tidss->pd_dev =3D devm_kmalloc_array(dev, tidss->num_domains, + sizeof(*tidss->pd_dev), GFP_KERNEL); + if (!tidss->pd_dev) + return -ENOMEM; + + tidss->pd_link =3D devm_kmalloc_array(dev, tidss->num_domains, + sizeof(*tidss->pd_link), GFP_KERNEL); + if (!tidss->pd_link) + return -ENOMEM; + + for (i =3D 0; i < tidss->num_domains; i++) { + tidss->pd_dev[i] =3D dev_pm_domain_attach_by_id(dev, i); + if (IS_ERR(tidss->pd_dev[i])) { + ret =3D PTR_ERR(tidss->pd_dev[i]); + goto fail; + } + + tidss->pd_link[i] =3D device_link_add(dev, tidss->pd_dev[i], + DL_FLAG_STATELESS | + DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE); + if (!tidss->pd_link[i]) { + ret =3D -EINVAL; + goto fail; + } + } + + return 0; +fail: + tidss_detach_pm_domains(tidss); + return ret; +} + static int tidss_probe(struct platform_device *pdev) { struct device *dev =3D &pdev->dev; @@ -129,15 +192,21 @@ static int tidss_probe(struct platform_device *pdev) =20 spin_lock_init(&tidss->irq_lock); =20 + ret =3D tidss_attach_pm_domains(tidss); + if (ret < 0) + return dev_err_probe(dev, ret, "failed to attach power domains\n"); + ret =3D dispc_init(tidss); if (ret) { - dev_err(dev, "failed to initialize dispc: %d\n", ret); - return ret; + dev_err_probe(dev, ret, "failed to initialize dispc\n"); + goto err_detach_pm_domains; } =20 ret =3D tidss_oldi_init(tidss); - if (ret) - return dev_err_probe(dev, ret, "failed to init OLDI\n"); + if (ret) { + dev_err_probe(dev, ret, "failed to init OLDI\n"); + goto err_detach_pm_domains; + } =20 pm_runtime_enable(dev); =20 @@ -205,6 +274,9 @@ static int tidss_probe(struct platform_device *pdev) =20 tidss_oldi_deinit(tidss); =20 +err_detach_pm_domains: + tidss_detach_pm_domains(tidss); + return ret; } =20 @@ -232,6 +304,8 @@ static void tidss_remove(struct platform_device *pdev) /* devm allocated dispc goes away with the dev so mark it NULL */ dispc_remove(tidss); =20 + tidss_detach_pm_domains(tidss); + dev_dbg(dev, "%s done\n", __func__); } =20 diff --git a/drivers/gpu/drm/tidss/tidss_drv.h b/drivers/gpu/drm/tidss/tids= s_drv.h index e1c1f41d8b4b..6625b989b815 100644 --- a/drivers/gpu/drm/tidss/tidss_drv.h +++ b/drivers/gpu/drm/tidss/tidss_drv.h @@ -41,6 +41,10 @@ struct tidss_device { /* protects the irq masks field and irqenable/irqstatus registers */ spinlock_t irq_lock; dispc_irq_t irq_mask; /* enabled irqs */ + + int num_domains; /* Count of PM domains to be handled */ + struct device **pd_dev; + struct device_link **pd_link; }; =20 #define to_tidss(__dev) container_of(__dev, struct tidss_device, ddev) From nobody Sat Feb 7 06:21:21 2026 Received: from BL0PR03CU003.outbound.protection.outlook.com (mail-eastusazhn15012016.outbound.protection.outlook.com [52.102.137.16]) (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 3F7693587CE; 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X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Jan 2026 09:54:33.6348 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c1c585cd-2789-43ae-ee57-08de54e5405b X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.21.195];Helo=[flwvzet201.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF00003AE5.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA3PR10MB8492 Content-Type: text/plain; charset="utf-8" The DSS controller on TI's AM62P SoC features two instances of the TI DSS. Each DSS instance supports two video ports, similar to the DSS controller found on the TI AM62X SoC. This allows three independent video streams to be supported: OLDI, DPI, and DSI. Since the DSS instances on AM62P are architecturally similar to those on the AM62X DSS controller, the existing dispc_am625_feats configuration can be reused for the AM62P DSS support. This patch adds the necessary device tree compatibility entry for "ti,am62p-dss" in the tidss driver, pointing to dispc_am625_feats, thereby enabling DSS support on AM62P devices. Reviewed-by: Tomi Valkeinen Signed-off-by: Swamil Jain --- drivers/gpu/drm/tidss/tidss_drv.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/tidss/tidss_drv.c b/drivers/gpu/drm/tidss/tids= s_drv.c index 93e0c34c73aa..ff6d0adf89e8 100644 --- a/drivers/gpu/drm/tidss/tidss_drv.c +++ b/drivers/gpu/drm/tidss/tidss_drv.c @@ -319,6 +319,7 @@ static const struct of_device_id tidss_of_table[] =3D { { .compatible =3D "ti,am625-dss", .data =3D &dispc_am625_feats, }, { .compatible =3D "ti,am62a7-dss", .data =3D &dispc_am62a7_feats, }, { .compatible =3D "ti,am62l-dss", .data =3D &dispc_am62l_feats, }, + { .compatible =3D "ti,am62p-dss", .data =3D &dispc_am625_feats, }, { .compatible =3D "ti,am65x-dss", .data =3D &dispc_am65x_feats, }, { .compatible =3D "ti,j721e-dss", .data =3D &dispc_j721e_feats, }, { }