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(unknown [61.154.14.86]) by smtp.qiye.163.com (Hmail) with ESMTP id 4f5398e40; Mon, 28 Sep 2026 16:15:02 +0800 (GMT+08:00) From: Damon Ding To: Andrzej Hajda , Neil Armstrong , Robert Foss , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jingoo Han , Inki Dae , Seung-Woo Kim , Kyungmin Park , Krzysztof Kozlowski , Peter Griffin , Alim Akhtar , Heiko Stuebner Cc: Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Luca Ceresoli , Dmitry Baryshkov , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, Damon Ding Subject: [PATCH v3 01/14] drm/bridge: analogix_dp: Return bitmask from analogix_dp_get_irq_type() Date: Mon, 28 Sep 2026 16:14:05 +0800 Message-Id: <20260928081418.3605775-2-damon.ding@rock-chips.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260928081418.3605775-1-damon.ding@rock-chips.com> References: <20260928081418.3605775-1-damon.ding@rock-chips.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-HM-Tid: 0aa0e714eaeb03a8kunm323e2b5437cf01 X-HM-MType: 1 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFITzdXWRgWCB1ZQUpXWS1ZQUlXWQ8JGhUIEh9ZQVkaSUlIVkJCT0pPHx1IHkJIS1YVFA kWGhdVEwETFhoSFyQUDg9ZV1kYEgtZQVlNSlVKTk9VSk9VQ01ZV1kWGg8SFR0UWUFZT0tIVUpLSU JDQ0xVSktLVUtZBg++ DKIM-Signature: a=rsa-sha256; b=e9rUnIUnggVntlM+VCCn3Pgkdao9uZAva/eyhDYkS+mpJG9kvFVs+UQiHBHj9uanrY95E6qMpW1TWQN2yXUCRx3lCupYRaGdilL+QImZUX58j6Nf8p1gib6hDpwyGY27P3ZS378dJuT2MjFTMCcmDRplArlaJ9yRXcHWo+75Yjw=; s=default; c=relaxed/relaxed; d=rock-chips.com; v=1; bh=fTbtcGZ0NiXRdk++xUkHW9KoNxxGSWE+RUMF8C782Oc=; h=date:mime-version:subject:message-id:from; X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260928_011514_545199_7C4567AA X-CRM114-Status: GOOD ( 14.36 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Analogix DP controllers support two sets of interrupts for hotplug detection: HOTPLUG_CHG, and the pair PLUG / HPD_LOST. The current driver logic relies on PLUG/HPD_LOST and does not consume HOTPLUG_CHG, nor does it check for INT_HPD for IRQ_HPD events. The existing analogix_dp_get_irq_type() returns on the first matched interrupt flag. This causes the hardirq handler to unconditionally mute all HPD interrupts, including HOTPLUG_CHG and INT_HPD, creating a limitation for future extensions. To prepare fine-grained interrupt handling, convert the return type from enum dp_irq_type to a u32 bitmask. Accumulate all pending interrupt flags instead of returning early, and add detection for DP_IRQ_TYPE_IRQ_HPD. Remove DP_IRQ_TYPE_UNKNOWN sentinel; use zero to indicate no pending interrupts, which simplifies code and facilitates future extension for additional interrupt types. Signed-off-by: Damon Ding --- .../gpu/drm/bridge/analogix/analogix_dp_core.c | 8 ++++---- .../gpu/drm/bridge/analogix/analogix_dp_core.h | 4 ++-- .../gpu/drm/bridge/analogix/analogix_dp_reg.c | 18 ++++++++++-------- 3 files changed, 16 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 6df6963740d2..079f2f01f33b 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -701,10 +701,10 @@ static irqreturn_t analogix_dp_hardirq(int irq, void *arg) { struct analogix_dp_device *dp = arg; irqreturn_t ret = IRQ_NONE; - enum dp_irq_type irq_type; + u32 irq_type; irq_type = analogix_dp_get_irq_type(dp); - if (irq_type != DP_IRQ_TYPE_UNKNOWN) { + if (irq_type) { analogix_dp_mute_hpd_interrupt(dp); ret = IRQ_WAKE_THREAD; } @@ -715,7 +715,7 @@ static irqreturn_t analogix_dp_hardirq(int irq, void *arg) static irqreturn_t analogix_dp_irq_thread(int irq, void *arg) { struct analogix_dp_device *dp = arg; - enum dp_irq_type irq_type; + u32 irq_type; irq_type = analogix_dp_get_irq_type(dp); if (irq_type & DP_IRQ_TYPE_HP_CABLE_IN || @@ -725,7 +725,7 @@ static irqreturn_t analogix_dp_irq_thread(int irq, void *arg) drm_helper_hpd_irq_event(dp->drm_dev); } - if (irq_type != DP_IRQ_TYPE_UNKNOWN) { + if (irq_type) { analogix_dp_clear_hotplug_interrupts(dp); analogix_dp_unmute_hpd_interrupt(dp); } diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h index 4560597604ad..3f40d95757c5 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h @@ -120,7 +120,7 @@ enum dp_irq_type { DP_IRQ_TYPE_HP_CABLE_IN = BIT(0), DP_IRQ_TYPE_HP_CABLE_OUT = BIT(1), DP_IRQ_TYPE_HP_CHANGE = BIT(2), - DP_IRQ_TYPE_UNKNOWN = BIT(3), + DP_IRQ_TYPE_IRQ_HPD = BIT(3), }; struct video_info { @@ -195,7 +195,7 @@ void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp, int analogix_dp_init_analog_func(struct analogix_dp_device *dp); void analogix_dp_init_hpd(struct analogix_dp_device *dp); void analogix_dp_force_hpd(struct analogix_dp_device *dp); -enum dp_irq_type analogix_dp_get_irq_type(struct analogix_dp_device *dp); +u32 analogix_dp_get_irq_type(struct analogix_dp_device *dp); void analogix_dp_clear_hotplug_interrupts(struct analogix_dp_device *dp); void analogix_dp_reset_aux(struct analogix_dp_device *dp); void analogix_dp_init_aux(struct analogix_dp_device *dp); diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c index c1344a3f013a..49c1961e4326 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c @@ -412,8 +412,9 @@ void analogix_dp_force_hpd(struct analogix_dp_device *dp) writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_3); } -enum dp_irq_type analogix_dp_get_irq_type(struct analogix_dp_device *dp) +u32 analogix_dp_get_irq_type(struct analogix_dp_device *dp) { + u32 irq_type = 0; u32 reg; if (dp->hpd_gpiod) { @@ -425,17 +426,18 @@ enum dp_irq_type analogix_dp_get_irq_type(struct analogix_dp_device *dp) } else { /* Parse hotplug interrupt status register */ reg = readl(dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_4); - if (reg & PLUG) - return DP_IRQ_TYPE_HP_CABLE_IN; - + irq_type |= DP_IRQ_TYPE_HP_CABLE_IN; if (reg & HPD_LOST) - return DP_IRQ_TYPE_HP_CABLE_OUT; - + irq_type |= DP_IRQ_TYPE_HP_CABLE_OUT; if (reg & HOTPLUG_CHG) - return DP_IRQ_TYPE_HP_CHANGE; + irq_type |= DP_IRQ_TYPE_HP_CHANGE; + + reg = readl(dp->reg_base + ANALOGIX_DP_INT_STA); + if (reg & INT_HPD) + irq_type |= DP_IRQ_TYPE_IRQ_HPD; - return DP_IRQ_TYPE_UNKNOWN; + return irq_type; } } -- 2.34.1