From patchwork Wed Aug 21 10:23:46 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Murthy, Arun R" X-Patchwork-Id: 13771212 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 714C0C5320E for ; Wed, 21 Aug 2024 10:33:39 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1836E10E8C9; Wed, 21 Aug 2024 10:33:39 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="c2ikDiqK"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1E5F710E8CE for ; Wed, 21 Aug 2024 10:33:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1724236419; x=1755772419; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=kzuQNPD78+hB4dBx4NvvULUgn1hhtSwNfgk6YeqegOE=; b=c2ikDiqK2PioFaMDKecv+Fm1Nsrrra7xpZMt0yKqsHL1FBIcCXiE32RY ReOHiJOcCrqUcG6JCqpFYkBkAC47QejoJQGZ/R02nNGmyKbG7ulsrpNVI Ggr2I5drCVM2qKfJ7mG8+bA9WsCyUZyDHwTDAgr7J9E/iMV2ySzaFalpU gfElrbssZCbd9vSyTI5GZOcma7CdjBnW2U734f613nql6Np/fV1u9Ud/X fRbgifCa2rRS5+97QXEMqBHhh/97HyM7l3iLes6RHu5yfrgyARG48ncXE 5/iqFc6AuDOXvLl0zyQfAk9Cakh7jBjr47WUzeEd6xtFGazkq7Dl5LQlI w==; X-CSE-ConnectionGUID: XFQnmVkQQEaHn8kj4rwufA== X-CSE-MsgGUID: F5rHfBrRThuKrhpIpiHFDw== X-IronPort-AV: E=McAfee;i="6700,10204,11170"; a="33155450" X-IronPort-AV: E=Sophos;i="6.10,164,1719903600"; d="scan'208";a="33155450" Received: from fmviesa004.fm.intel.com ([10.60.135.144]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Aug 2024 03:33:39 -0700 X-CSE-ConnectionGUID: fKxEMzecTR6UiuRU39gtiA== X-CSE-MsgGUID: wU1dJR51SAmL+2ErQlXhGA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,164,1719903600"; d="scan'208";a="65740606" Received: from srr4-3-linux-106-armuthy.iind.intel.com ([10.190.238.56]) by fmviesa004.fm.intel.com with ESMTP; 21 Aug 2024 03:33:36 -0700 From: Arun R Murthy To: intel-gfx@lists.freedesktop.org Cc: Arun R Murthy Subject: [PATCHv2 2/5] drm/i915/display: histogram interrupt handling Date: Wed, 21 Aug 2024 15:53:46 +0530 Message-Id: <20240821102349.3961986-3-arun.r.murthy@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240821102349.3961986-1-arun.r.murthy@intel.com> References: <20240821102349.3961986-1-arun.r.murthy@intel.com> MIME-Version: 1.0 X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Upon enabling histogram an interrupt is trigerred after the generation of the statistics. This patch registers the histogram interrupt and handles the interrupt. v2: Added intel_crtc backpointer to intel_histogram struct (Jani) Removed histogram_wq and instead use dev_priv->unodered_eq (Jani) Signed-off-by: Arun R Murthy --- .../gpu/drm/i915/display/intel_display_irq.c | 6 +- .../gpu/drm/i915/display/intel_histogram.c | 80 ++++++++++++++++++- .../gpu/drm/i915/display/intel_histogram.h | 3 + drivers/gpu/drm/i915/i915_reg.h | 5 +- 4 files changed, 89 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display_irq.c b/drivers/gpu/drm/i915/display/intel_display_irq.c index afcd2af82942..0178595102bb 100644 --- a/drivers/gpu/drm/i915/display/intel_display_irq.c +++ b/drivers/gpu/drm/i915/display/intel_display_irq.c @@ -17,6 +17,7 @@ #include "intel_fdi_regs.h" #include "intel_fifo_underrun.h" #include "intel_gmbus.h" +#include "intel_histogram.h" #include "intel_hotplug_irq.h" #include "intel_pipe_crc_regs.h" #include "intel_pmdemand.h" @@ -1170,6 +1171,9 @@ void gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl) if (iir & gen8_de_pipe_underrun_mask(dev_priv)) intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe); + if (iir & GEN9_PIPE_HISTOGRAM_EVENT) + intel_histogram_irq_handler(dev_priv, pipe); + fault_errors = iir & gen8_de_pipe_fault_mask(dev_priv); if (fault_errors) drm_err_ratelimited(&dev_priv->drm, @@ -1701,7 +1705,7 @@ void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv) struct intel_uncore *uncore = &dev_priv->uncore; u32 de_pipe_masked = gen8_de_pipe_fault_mask(dev_priv) | - GEN8_PIPE_CDCLK_CRC_DONE; + GEN8_PIPE_CDCLK_CRC_DONE | GEN9_PIPE_HISTOGRAM_EVENT; u32 de_pipe_enables; u32 de_port_masked = gen8_de_port_aux_mask(dev_priv); u32 de_port_enables; diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c b/drivers/gpu/drm/i915/display/intel_histogram.c index 45e968e00af6..83ba826a7a89 100644 --- a/drivers/gpu/drm/i915/display/intel_histogram.c +++ b/drivers/gpu/drm/i915/display/intel_histogram.c @@ -19,12 +19,83 @@ struct intel_histogram { struct drm_i915_private *i915; + struct intel_crtc *crtc; + struct delayed_work handle_histogram_int_work; bool enable; bool can_enable; - enum pipe pipe; u32 bindata[HISTOGRAM_BIN_COUNT]; }; +static void intel_histogram_handle_int_work(struct work_struct *work) +{ + struct intel_histogram *histogram = container_of(work, + struct intel_histogram, handle_histogram_int_work.work); + struct drm_i915_private *i915 = histogram->i915; + struct intel_crtc *intel_crtc = histogram->crtc; + char *histogram_event[] = {"HISTOGRAM=1", NULL}; + u32 dpstbin; + int i, try = 0; + + /* + * TODO: PSR to be exited while reading the Histogram data + * Set DPST_CTL Bin Reg function select to TC + * Set DPST_CTL Bin Register Index to 0 + */ +retry: + intel_de_rmw(i915, DPST_CTL(intel_crtc->pipe), + DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_BIN_REG_MASK, 0); + for (i = 0; i < HISTOGRAM_BIN_COUNT; i++) { + dpstbin = intel_de_read(i915, DPST_BIN(intel_crtc->pipe)); + if (dpstbin & DPST_BIN_BUSY) { + /* + * If DPST_BIN busy bit is set, then set the + * DPST_CTL bin reg index to 0 and proceed + * from beginning. + */ + if (try++ >= 5) { + drm_err(&i915->drm, + "Histogram block is busy, failed to read\n"); + intel_de_rmw(i915, DPST_GUARD(intel_crtc->pipe), + DPST_GUARD_HIST_EVENT_STATUS, 1); + return; + } + goto retry; + } + histogram->bindata[i] = dpstbin & DPST_BIN_DATA_MASK; + drm_dbg_atomic(&i915->drm, "Histogram[%d]=%x\n", + i, histogram->bindata[i]); + } + + /* Notify user for Histogram rediness */ + if (kobject_uevent_env(&i915->drm.primary->kdev->kobj, KOBJ_CHANGE, + histogram_event)) + drm_err(&i915->drm, "sending HISTOGRAM event failed\n"); + + /* Enable histogram interrupt */ + intel_de_rmw(i915, DPST_GUARD(intel_crtc->pipe), DPST_GUARD_HIST_INT_EN, + DPST_GUARD_HIST_INT_EN); + + /* Clear histogram interrupt by setting histogram interrupt status bit*/ + intel_de_rmw(i915, DPST_GUARD(intel_crtc->pipe), + DPST_GUARD_HIST_EVENT_STATUS, 1); +} + +void intel_histogram_irq_handler(struct drm_i915_private *i915, enum pipe pipe) +{ + struct intel_crtc *intel_crtc = + to_intel_crtc(drm_crtc_from_index(&i915->drm, pipe)); + struct intel_histogram *histogram = intel_crtc->histogram; + + if (!histogram->enable) { + drm_err(&i915->drm, + "spurious interrupt, histogram not enabled\n"); + return; + } + + queue_delayed_work(i915->unordered_wq, + &histogram->handle_histogram_int_work, 0); +} + int intel_histogram_atomic_check(struct intel_crtc *intel_crtc) { struct intel_histogram *histogram = intel_crtc->histogram; @@ -120,6 +191,7 @@ static void intel_histogram_disable(struct intel_crtc *intel_crtc) intel_de_rmw(i915, DPST_CTL(pipe), DPST_CTL_IE_HIST_EN, 0); + cancel_delayed_work(&histogram->handle_histogram_int_work); histogram->enable = false; } @@ -181,6 +253,7 @@ void intel_histogram_deinit(struct intel_crtc *intel_crtc) { struct intel_histogram *histogram = intel_crtc->histogram; + cancel_delayed_work_sync(&histogram->handle_histogram_int_work); kfree(histogram); } @@ -196,9 +269,12 @@ int intel_histogram_init(struct intel_crtc *intel_crtc) } intel_crtc->histogram = histogram; - histogram->pipe = intel_crtc->pipe; + histogram->crtc = intel_crtc; histogram->can_enable = false; + INIT_DEFERRABLE_WORK(&histogram->handle_histogram_int_work, + intel_histogram_handle_int_work); + histogram->i915 = i915; return 0; diff --git a/drivers/gpu/drm/i915/display/intel_histogram.h b/drivers/gpu/drm/i915/display/intel_histogram.h index b25091732274..f35ea76719d8 100644 --- a/drivers/gpu/drm/i915/display/intel_histogram.h +++ b/drivers/gpu/drm/i915/display/intel_histogram.h @@ -9,6 +9,8 @@ #include struct intel_crtc; +struct drm_i915_private; +enum pipe; /* GLOBAL_HIST related registers */ #define _DPST_CTL_A 0x490C0 @@ -70,6 +72,7 @@ enum intel_global_hist_lut { }; int intel_histogram_atomic_check(struct intel_crtc *intel_crtc); +void intel_histogram_irq_handler(struct drm_i915_private *i915, enum pipe pipe); int intel_histogram_update(struct intel_crtc *intel_crtc, bool enable); int intel_histogram_set_iet_lut(struct intel_crtc *intel_crtc, u32 *data); int intel_histogram_init(struct intel_crtc *intel_crtc); diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 569b461022c5..f7b974691381 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1655,7 +1655,7 @@ #define PIPE_HOTPLUG_INTERRUPT_ENABLE (1UL << 26) #define PIPE_VSYNC_INTERRUPT_ENABLE (1UL << 25) #define PIPE_DISPLAY_LINE_COMPARE_ENABLE (1UL << 24) -#define PIPE_DPST_EVENT_ENABLE (1UL << 23) +#define PIPE_HISTOGRAM_EVENT_ENABLE (1UL << 23) #define SPRITE0_FLIP_DONE_INT_EN_VLV (1UL << 22) #define PIPE_LEGACY_BLC_EVENT_ENABLE (1UL << 22) #define PIPE_ODD_FIELD_INTERRUPT_ENABLE (1UL << 21) @@ -1678,7 +1678,7 @@ #define PIPE_HOTPLUG_INTERRUPT_STATUS (1UL << 10) #define PIPE_VSYNC_INTERRUPT_STATUS (1UL << 9) #define PIPE_DISPLAY_LINE_COMPARE_STATUS (1UL << 8) -#define PIPE_DPST_EVENT_STATUS (1UL << 7) +#define PIPE_HISTOGRAM_EVENT_STATUS (1UL << 7) #define PIPE_A_PSR_STATUS_VLV (1UL << 6) #define PIPE_LEGACY_BLC_EVENT_STATUS (1UL << 6) #define PIPE_ODD_FIELD_INTERRUPT_STATUS (1UL << 5) @@ -2516,6 +2516,7 @@ #define GEN11_PIPE_PLANE7_FLIP_DONE REG_BIT(18) /* icl/tgl */ #define GEN11_PIPE_PLANE6_FLIP_DONE REG_BIT(17) /* icl/tgl */ #define GEN11_PIPE_PLANE5_FLIP_DONE REG_BIT(16) /* icl+ */ +#define GEN9_PIPE_HISTOGRAM_EVENT REG_BIT(12) /* skl+ */ #define GEN9_PIPE_CURSOR_FAULT REG_BIT(11) /* skl+ */ #define GEN9_PIPE_PLANE4_FAULT REG_BIT(10) /* skl+ */ #define GEN8_PIPE_CURSOR_FAULT REG_BIT(10) /* bdw */