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(unknown [61.154.14.86]) by smtp.qiye.163.com (Hmail) with ESMTP id 481c5dbc2; Thu, 30 Jul 2026 11:27:56 +0800 (GMT+08:00) From: Damon Ding To: Andrzej Hajda , Neil Armstrong , Robert Foss , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Heiko Stuebner , Andy Yan Cc: Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Luca Ceresoli , Dmitry Baryshkov , Marek Szyprowski , Sebastian Reichel , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Damon Ding Subject: [PATCH v1 0/7] Add HPD support for Rockchip Analogix DP Date: Thu, 30 Jul 2026 11:27:37 +0800 Message-Id: <20260730032744.381566-1-damon.ding@rock-chips.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-HM-Tid: 0a9fb1107efc03a8kunm040f79123746ca X-HM-MType: 1 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFITzdXWRgWCB1ZQUpXWS1ZQUlXWQ8JGhUIEh9ZQVkaSxlPVhpDQkNIQk1NS0kdHVYVFA kWGhdVEwETFhoSFyQUDg9ZV1kYEgtZQVlNSlVKTk9VSk9VQ01ZV1kWGg8SFR0UWUFZT0tIVUpLSU 9PT0hVSktLVUpCS0tZBg++ DKIM-Signature: a=rsa-sha256; b=M5jPIv6UdHfbkWzCY96X6Pj0bLzAEZZRcyH61ovgYl9m3kd9ON0PPhp7nVeMAfIbeNn3EgNmfjz0Hv1QAsxV2LWOi+rNXJD6QDNCo+8Gga3dnOGM+R/mSBJm7XUcsZM5LPZ9SeLeyfS4nHe78t5M+QzivXqdBrCvm24vY5aGM4o=; c=relaxed/relaxed; s=default; d=rock-chips.com; v=1; bh=2DTb8Z0TivZDfrZk89jRLneek8ISpVFxvHsaLnCrg2Q=; h=date:mime-version:subject:message-id:from; This series improves the HPD (Hotplug Detect) interrupt handling in the Analogix DP driver to enable reliable native HPD pin detection on Rockchip platforms, and introduces platform-specific HPD detection schemes with fine-grained interrupt control. On Rockchip platforms, the Analogix DP native HPD pin IRQ requires the DP controller to remain powered, clocked and initialized to generate plug/unplug interrupts. The previous driver enabled/disabled IRQ during bridge enable/disable, which left no HPD detection when the display pipeline was inactive. Additionally, the interrupt mute/unmute/clear routines operated on all HPD interrupt bits unconditionally, lacking the granularity needed for per-event control. The series reorganizes IRQ and pm_runtime management into bind/unbind, converts the interrupt type detection to a bitmask-based scheme for fine-grained mute/unmute/clear operations, and configures Rockchip platforms to use the HOTPLUG_CHG interrupt with a 2ms HPD deglitch setting, which provides better stability than the PLUG + HPD_LOST pair. Tested on RK3576 with both native HPD pin and GPIO HPD configurations. Native HPD pin mode: &edp { status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&edp_txm0_pins>; }; GPIO HPD mode: &edp { status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&edp0_hpd>; hpd-gpios = <&gpio4 RK_PC1 GPIO_ACTIVE_HIGH>; }; &pinctrl { edp { edp0_hpd: edp0-hpd { rockchip,pins = <4 RK_PC1 0 &pcfg_pull_none>; }; }; }; Both configurations detect cable plug/unplug events correctly. Patch 1: Move enable_irq()/disable_irq() to bind/unbind and hold a pm_runtime reference for Rockchip native HPD pin mode. Patch 2: Convert analogix_dp_get_irq_type() to return a u32 bitmask instead of an enum, accumulating all pending interrupt flags. Patch 3: Extend mute/unmute helpers to accept an irq_type bitmask for per-event interrupt masking. Patch 4: Extend clear_hotplug_interrupts() to accept an irq_type bitmask for per-event pending interrupt clearing. Patch 5: Simplify analogix_dp_config_interrupt() by removing redundant local macros and leveraging the unmute helper. Patch 6: Configure Rockchip platforms to use HOTPLUG_CHG interrupt with 2ms HPD deglitch; other platforms keep PLUG + HPD_LOST pair. Patch 7: Skip native HPD interrupt register operations for GPIO HPD mode, where hotplug is detected through an external GPIO. Damon Ding (7): drm/bridge: analogix_dp: Manage pm runtime and IRQ for native HPD pin detection drm/bridge: analogix_dp: Return bitmask from analogix_dp_get_irq_type() drm/bridge: analogix_dp: Extend mute/unmute HPD interrupts to accept irq bitmask drm/bridge: analogix_dp: Extend clear_hotplug_interrupts to accept IRQ bitmask drm/bridge: analogix_dp: Simplify analogix_dp_config_interrupt() drm/bridge: analogix_dp: Use platform-specific HPD detection scheme drm/bridge: analogix_dp: Skip native HPD interrupt ops for GPIO HPD .../drm/bridge/analogix/analogix_dp_core.c | 46 ++++-- .../drm/bridge/analogix/analogix_dp_core.h | 10 +- .../gpu/drm/bridge/analogix/analogix_dp_reg.c | 146 ++++++++++++------ 3 files changed, 134 insertions(+), 68 deletions(-) -- 2.34.1