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a=ed25519-sha256; t=1786176472; l=8700; i=mohit.dsor@oss.qualcomm.com; s=20260808; h=from:subject:message-id; bh=Fjxr2GAzlm8AhbKBg7HjaqAi8WIvKtQmk9yk8SJh9ss=; b=YeLxGUKwkmOYCftPvNR8mH8Q0H65k1RkDPC3PKBAZU/LDrMLwnQdCNHlnd9j0VU+/KnPUh2hp bm0BIUwp2v2D6Be822I1koGgLSjnKkM3aDDOxE5nxeGx4Zy2RfTC2FX X-Developer-Key: i=mohit.dsor@oss.qualcomm.com; a=ed25519; pk=outHVBN53JhozDw1xkj3G1qrqqE5scMBP7M4WL3aHQQ= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODA4MDA2NSBTYWx0ZWRfX6mlCN85hwoer wxRswBXOvvkQOXKKJVK+Ug7N0Uw8gRUdj5sQ603IqH+wXpiX0B55/hGPkY77oLJWgyGzjX8TBHS e+y29yXXdUmdCn4NRFjfHwPJyJx/ZGFJNlNMZwUEpA9GR6HkxR5y69TyVQ3mdQWdUgbtkGdyGMU CHtyIB0z72GwrnDMrtjVgKTEFgjKqE1xoUwe2aRZou2x0RvMQH6ZvGluriyAGMTTcmlnV1xo6W5 9anBe036PtSc9gt2eRkN6Czo4d+JJdf1PkTEVIe+sGi5Bm4eCV8kvyhBWuvHUJLiphtBq4U4dAs 4HfIduwk04AGPX82jU+uM6lP71sajyT3GRTdwhs0CzN69uMfetgbaLqlloxxyVon6TewOPU7Tdg T3HqY1wo+MroOZXQZxaBEJ1sIlJem7VRcFkxxQBti5Onj5/drIRuYUKRI4t1C866y3Ydx2kp7uY kXlZtOY3HGYi6TtracQ== X-Proofpoint-GUID: z9qw5cdur-6TR18Ql2t5KwZMsEkFw5tu X-Proofpoint-ORIG-GUID: z9qw5cdur-6TR18Ql2t5KwZMsEkFw5tu X-Authority-Analysis: v=2.4 cv=ebgNubEH c=1 sm=1 tr=0 ts=6a76e3e0 cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=Kz8-B0t5AAAA:8 a=QyXUC8HyAAAA:8 a=KKAkSRfTAAAA:8 a=P1BnusSwAAAA:8 a=pGLkceISAAAA:8 a=P-IC7800AAAA:8 a=e5mUnYsNAAAA:8 a=zeht-xdHoPxp13dTMxwA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=iS9zxrgQBfv6-_F4QbHw:22 a=RuZk68QooNbwfxovefhk:22 a=cvBusfyB2V15izCimMoJ:22 a=D0XLA9XvdZm18NrgonBM:22 a=d3PnA9EDa4IxuAV0gXij:22 a=Vxmtnl_E_bksehYqCbjh:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwODA4MDA2NSBTYWx0ZWRfX2ZWTCUiriPzO 5PzyzhHlfhF6XYEZotFwNTKMJWz4aVi6Km6zTI2GP4HYTg5+DrabRu4kIP02ECVLW/5TTbhr36j k7MPVkirefAs3WpVUH2TtNwOqfenMoc= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-08_03,2026-08-07_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 spamscore=0 bulkscore=0 lowpriorityscore=0 clxscore=1015 adultscore=0 phishscore=0 malwarescore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608080065 This series introduces: - A device tree binding YAML file describing the hardware - A new DRM bridge driver implementing the basic functionality LT9611C(EX/UXD) is an I2C-controlled chip that Receiver signal/dual port mipi dsi and output hdmi, differences in hardware features: - LT9611C: supports 1-port mipi dsi to hdmi 1.4 - LT9611EX: supports 2-port mipi dsi to hdmi 1.4 - LT9611UXD: supports 2-port mipi dsi to hdmi 1.4/2.0 Changes in v10: - Fix lt9611c_block_erase: check return value of read_poll_timeout to avoid writing to un-erased flash - Fix NULL dereference: check i2c_get_match_data() return value before dereferencing - Fix irq handler: return IRQ_NONE when BIT(0) is not set - Fix devm_drm_bridge_add: check and propagate error return - Fix use-after-free in remove: call disable_irq() before cancel_work_sync() - Fix bridge/regulator ordering in remove: use drm_bridge_add/drm_bridge_remove explicitly so bridge is unregistered before regulators are disabled - Promote firmware upgrade success log from dev_dbg to dev_info - Link to v9: https://lore.kernel.org/lkml/20260804-lt9611c-v7-v9-0-3423a76856d3@oss.qualcomm.com/ Changes in v9: - Use regmap_bulk_write for 4-byte header write in read_write_flow - Replace while(1) loop with read_poll_timeout in lt9611c_block_erase; read_flash_reg_status now returns unsigned int - Fix unchecked regmap_read in lt9611c_upgrade_result; return -EIO on CRC mismatch - Add struct lt9611c_chip_data with chip_type and max_tmds_rate; fix i2c_device_id table driver_data to use chip data pointers - Use put_unaligned_be16() to replace manual high/low byte splits in lt9611c_video_setup - Extract lt9611c_write_infoframe() and lt9611c_clear_infoframe() helpers; consolidate 6 infoframe functions into 2 helpers - Remove lt9611c_hdmi_audio_startup and its bridge_funcs entry - Remove hpd_enable callback from bridge_funcs - Fix scoped_guard(mutex) deadlock in audio_prepare: release lock before calling drm_atomic_helper_connector_hdmi_update_audio_infoframe() - Fix probe order: lt9611c_reset() before enable_irq() - Fix remove(): remove disable_irq() (IRQ is devm_request_threaded_irq-managed) - Fix bridge_suspend() unwind: on regulator_bulk_disable failure, de-assert reset and re-enable IRQ - Move devm_drm_bridge_add to after both DSI attaches; remove cancel_work_sync from err_remove_bridge label - Move request_firmware outside mcu_lock in lt9611c_firmware_upgrade; lock only wraps hardware access - Re-read lt9611c->fw_version after successful firmware_store upgrade - Rename ocm_lock to mcu_lock throughout - Use goto err_put_dsi1 to eliminate duplicate DSI cleanup in probe error path - Fix mcu_lock comment to correctly describe what it protects - dt-binding: add if:then: block to disallow port@1 when compatible is lontium,lt9611c - Rename sysfs ABI doc to sysfs-driver-lontium; rename sysfs attribute from lt9611c_firmware to firmware - Kconfig: add I2C to depends on to satisfy REGMAP_I2C dependency - Link to v8: https://lore.kernel.org/lkml/20260728-lt9611c-v7-v8-0-bda216bfaf37@oss.qualcomm.com/ Changes in v8: - Refactor lt9611c_read_write_flow() to take a struct lt9611c_cmd parameter with an embedded struct lt9611c_cmd_hdr (func, type, seq, sep) and optional data payload, eliminating raw byte arrays at call sites - Add LT9611C_CMD_HDR_SIZE, LT9611C_EDID_BUF_SIZE constants to replace magic numbers - Use container_of_const() in bridge_to_lt9611c_const() - Remove obvious /*read only*/ comment - Use unsigned long cast instead of uintptr_t for chip type initialization - Replace memset + memcpy with memcpy + memset for CRC buffer preparation - Add ABI documentation for lt9611c_firmware sysfs attribute - Fix Kconfig help text to proper prose within line limits - Add disable_irq() before cancel_work_sync() in lt9611c_remove() - Add cancel_work_sync() in lt9611c_bridge_suspend() - Inline lt9611c_gpio_init() into probe - Use of_drm_get_bridge_by_endpoint() instead of drm_of_find_panel_or_bridge() + drm_bridge_get() - Return error if LT9611C (single DSI only) is configured with dual DSI in device tree - Move HPD status read_write_flow call from IRQ handler to lt9611c_hpd_work workqueue - Removed second lt9611_reset call from probe as not needed - Add struct lt9611c_rsp symmetric to struct lt9611c_cmd — both embed struct lt9611c_cmd_hdr - Link to v7: https://lore.kernel.org/lkml/20260716-lt9611c-v7-v7-0-7553a14735fc@oss.qualcomm.com/ Changes in v7: - Use i2c_get_match_data() for chip type initialization - Implement hdmi_write_hdmi_infoframe/hdmi_clear_hdmi_infoframe - Use drm_atomic_commit in bridge callbacks - Removing redundant lt9611c_reset() call and cleanup in probe error path - Populate bridge.vendor and bridge.product - implement hpd_enable callback - fix DT parsing and bridge refcount - Removed pre_enable and post_disable callbacks, it was affecting hpd as regulator was disabled - Changed reset gpio enablement and lt9611c_reset api. - Link to v6: https://lore.kernel.org/all/20260508134009.4582-1-syyang@lontium.com/ Changes in v6: - dt-binding: 1. sorted the compatible list alphabetically. [Dmitry] - Link to v5: https://lore.kernel.org/lkml/20260507024214.97708-1-syyang@lontium.com/ Changes in v5: - drm/bridge: 1. use #define FW_FILE "Lontium/lt9611c_fw.bin" to match linux-firmware [Dmitry] 2. add atomic state management - Link to v4: https://lore.kernel.org/lkml/20260506095100.78998-1-syyang@lontium.com/ Changes in v4: - dt-binding: 1. fix commit message [Krzysztof] - drm/bridge: 1. use lt9611c_fw.bin [Dmitry] 3. use enum lt9611_chip_type 4. remove *fw from the lt9611c struct 5. use read_poll_timeout and -ETIMEDOUT 6. replace mutex_lock with guard(mutex) in some places 7. switch to ARRAY_SIZE instead of specifying lengths directly 8. use dev_err_probe 9. add clear functions for AVI and audio infoframes 10. add DRM_BRIDGE_OP_HDMI and remove .hpd_notify 11. replace "GPL v2" with "GPL" - Link to v3: https://lore.kernel.org/lkml/20260420061644.1251070-1-syyang@lontium.com/ Changes in v3: - dt-binding: 1. lt9611c(ex/uxd) content merged into lontium,lt9611.yaml - drm/bridge: 1. Drop the licence text, only use SPDX header 2. Sort the headers 3. Use library functions for crc8 4. Use paged writes as implemented for LT9611C(EX/UXD) 5. Use HDMI audio helpers 6. Replace devm_kzalloc with devm_drm_bridge_alloc 7. Remove extra kthread - Link to v1: https://lore.kernel.org/lkml/20250903123825.1721443-1-syyang@lontium.com/ Changes in v2: 1. Forget modify code, operation error, Please disregard this submit. Changes in v1: - dt-binding: 1. Submit the first version of the code. - drm/bridge: 1. Submit the first version of the code. Signed-off-by: Mohit Dsor --- To: Andrzej Hajda To: Neil Armstrong To: Robert Foss To: Laurent Pinchart To: Jonas Karlman To: Jernej Skrabec To: Luca Ceresoli To: Maarten Lankhorst To: Maxime Ripard To: Thomas Zimmermann To: David Airlie To: Simona Vetter To: Rob Herring To: Krzysztof Kozlowski To: Conor Dooley To: Vinod Koul Cc: dri-devel@lists.freedesktop.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org --- Sunyun Yang (2): dt-bindings: bridge: Add Lontium LT9611C(EX/UXD) MIPI DSI to HDMI driver drm/bridge: Add Lontium LT9611C(EX/UXD) MIPI DSI to HDMI driver Documentation/ABI/testing/sysfs-lontium-firmware | 10 + .../bindings/display/bridge/lontium,lt9611.yaml | 18 +- drivers/gpu/drm/bridge/Kconfig | 18 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/lontium-lt9611c.c | 1283 ++++++++++++++++++++ 5 files changed, 1328 insertions(+), 2 deletions(-) --- base-commit: 34e27b90552acf21bd73aac395667c8aae6da480 change-id: 20260708-lt9611c-v7-ff76b2d1bf5f Best regards, -- Mohit Dsor