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Fri, 13 Mar 2026 11:31:20 +0800 (CST) From: Cunyuan Liu To: liviu.dudau@arm.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org Cc: neil.armstrong@linaro.org, heiko@sntech.de, marex@nabladev.com, dev@kael-k.io, prabhakar.mahadev-lad.rj@bp.renesas.com, andre.przywara@arm.com, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, cix-kernel-upstream@cixtech.com, Cunyuan Liu Subject: [PATCH v2 3/3] drm/komeda: Add support for Arm China Linlon-D6 Date: Fri, 13 Mar 2026 11:31:19 +0800 Message-ID: <20260313033119.33686-4-cunyuan.liu@cixtech.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260313033119.33686-1-cunyuan.liu@cixtech.com> References: <20260313033119.33686-1-cunyuan.liu@cixtech.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: TY2PEPF0000AB83:EE_|KL1PR06MB6942:EE_ Content-Type: text/plain X-MS-Office365-Filtering-Correlation-Id: 77c9a427-afda-4404-d809-08de80b0ff19 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Ip=[222.71.101.198]; Helo=[smtprelay.cixcomputing.com] X-MS-Exchange-CrossTenant-AuthSource: TY2PEPF0000AB83.apcprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: KL1PR06MB6942 X-Mailman-Approved-At: Fri, 13 Mar 2026 08:25:02 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Arm China Linlon-D6 is register-compatible with the Mali-D71 display pipeline for the purpose of basic modesetting. On Linlon-D6, the PRODUCT_ID register is located at the same offset as on Mali-D71 and reports 0x0060. The IP also exposes the same Komeda top-level block layout expected by the existing d71_identify() probing flow, so we can reuse the D71 function table to bring up the display engine. Reviewed-by: Liviu Dudau Signed-off-by: Cunyuan Liu --- drivers/gpu/drm/arm/display/include/malidp_product.h | 1 + drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c | 1 + drivers/gpu/drm/arm/display/komeda/komeda_drv.c | 1 + 3 files changed, 3 insertions(+) diff --git a/drivers/gpu/drm/arm/display/include/malidp_product.h b/drivers/gpu/drm/arm/display/include/malidp_product.h index 16a8a2c22c42..6f954bcdf40e 100644 --- a/drivers/gpu/drm/arm/display/include/malidp_product.h +++ b/drivers/gpu/drm/arm/display/include/malidp_product.h @@ -20,6 +20,7 @@ /* Mali-display product IDs */ #define MALIDP_D71_PRODUCT_ID 0x0071 #define MALIDP_D32_PRODUCT_ID 0x0032 +#define LINLONDP_D6_PRODUCT_ID 0x0060 union komeda_config_id { struct { diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c b/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c index 80973975bfdb..f105e3a2dce2 100644 --- a/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c +++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c @@ -628,6 +628,7 @@ d71_identify(u32 __iomem *reg_base, struct komeda_chip_info *chip) switch (product_id) { case MALIDP_D71_PRODUCT_ID: case MALIDP_D32_PRODUCT_ID: + case LINLONDP_D6_PRODUCT_ID: funcs = &d71_chip_funcs; break; default: diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c index 358c1512b087..4bb5f250e95e 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c @@ -104,6 +104,7 @@ static int komeda_platform_probe(struct platform_device *pdev) static const struct of_device_id komeda_of_match[] = { { .compatible = "arm,mali-d71", .data = d71_identify, }, { .compatible = "arm,mali-d32", .data = d71_identify, }, + { .compatible = "armchina,linlon-d6", .data = d71_identify, }, {}, }; -- 2.53.0