From patchwork Thu Nov 21 12:25:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arun R Murthy X-Patchwork-Id: 13881965 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 AB74DD6ED1B for ; Thu, 21 Nov 2024 12:35:51 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id ADB3310E919; Thu, 21 Nov 2024 12:35:50 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="gOpKl3JC"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.21]) by gabe.freedesktop.org (Postfix) with ESMTPS id E4F4210E918; Thu, 21 Nov 2024 12:35:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1732192549; x=1763728549; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Lm3Hse0/ffi2m0dXORfOB6ifKUeWQv069ePI/Q6zRnU=; b=gOpKl3JCYrpoVnC7PvbD1JWdtugKTDWYmGlAoWb1i7gAiDa1dOayGm1m 8gvsPRfVo4li/9HTorey6BG9qkyF33YP+UDYHGQaZiPvfdWbkykIGfjcj B8EQeRBFm28Eu7qU/lRUZtFz/Ng7xsP3Z84gz9JC8NImUtH0DTYmpKhqX QwmKeEk2h49YzlFda4MH0Zp4gJaje5iQ0cb58fqqraqmpePrmUqTlPJtF YMefg8EOhpFEo3WZvJ7y8olZ+bBEEdVoIVthQuN3tWS/2nqAmz054ZZX8 c6nCQAF4ZG90vf1vp/O+f3q44kLyl6td5BWlD2F/gd+NDw8/4h4UZwGr9 Q==; X-CSE-ConnectionGUID: esEBSCUUS9O+C+eyX9WEVA== X-CSE-MsgGUID: uAurL2AIQU+IdZ19qCm/Gw== X-IronPort-AV: E=McAfee;i="6700,10204,11263"; a="32230328" X-IronPort-AV: E=Sophos;i="6.12,172,1728975600"; d="scan'208";a="32230328" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Nov 2024 04:35:49 -0800 X-CSE-ConnectionGUID: FP6Ldq7hRxmjL0vVwsJmuQ== X-CSE-MsgGUID: NMJ/HhtlQEydLPDOhbzpQA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,172,1728975600"; d="scan'208";a="127765992" Received: from srr4-3-linux-106-armuthy.iind.intel.com ([10.190.238.56]) by orviesa001.jf.intel.com with ESMTP; 21 Nov 2024 04:35:47 -0800 From: Arun R Murthy To: intel-xe@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Cc: Arun R Murthy Subject: [PATCHv5 4/8] drm/i915/histogram: histogram interrupt handling Date: Thu, 21 Nov 2024 17:55:59 +0530 Message-Id: <20241121122603.736267-5-arun.r.murthy@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241121122603.736267-1-arun.r.murthy@intel.com> References: <20241121122603.736267-1-arun.r.murthy@intel.com> MIME-Version: 1.0 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" 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) v3: Replaced drm_i915_private with intel_display (Suraj) Refactored the histogram read code (Jani) v4: Rebased after addressing comments on patch 1 v5: removed the retry logic and moved to patch7 (Jani) Signed-off-by: Arun R Murthy --- .../gpu/drm/i915/display/intel_display_irq.c | 6 +- .../gpu/drm/i915/display/intel_histogram.c | 87 ++++++++++++++++++- .../gpu/drm/i915/display/intel_histogram.h | 3 + drivers/gpu/drm/i915/i915_reg.h | 5 +- 4 files changed, 96 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 f0d3bdb5fc60..cb60c9db4418 100644 --- a/drivers/gpu/drm/i915/display/intel_display_irq.c +++ b/drivers/gpu/drm/i915/display/intel_display_irq.c @@ -20,6 +20,7 @@ #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" @@ -1179,6 +1180,9 @@ void gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl) if (iir & GEN8_PIPE_FIFO_UNDERRUN) intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe); + if (iir & GEN9_PIPE_HISTOGRAM_EVENT) + intel_histogram_irq_handler(display, pipe); + fault_errors = iir & gen8_de_pipe_fault_mask(dev_priv); if (fault_errors) drm_err_ratelimited(&dev_priv->drm, @@ -1764,7 +1768,7 @@ 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 b2dda88a8093..243469c8ea80 100644 --- a/drivers/gpu/drm/i915/display/intel_histogram.c +++ b/drivers/gpu/drm/i915/display/intel_histogram.c @@ -19,7 +19,7 @@ #define HISTOGRAM_GUARDBAND_THRESHOLD_DEFAULT 300 /* Precision factor for threshold guardband */ #define HISTOGRAM_GUARDBAND_PRECISION_FACTOR 10000 -#define HISTOGRAM_DEFAULT_GUARDBAND_DELAY 0x04 +#define HISTOGRAM_BIN_READ_RETRY_COUNT 5 struct intel_histogram { struct intel_crtc *crtc; @@ -29,6 +29,84 @@ struct intel_histogram { u32 bin_data[HISTOGRAM_BIN_COUNT]; }; +static bool intel_histogram_get_data(struct intel_crtc *intel_crtc) +{ + struct intel_display *display = to_intel_display(intel_crtc); + struct intel_histogram *histogram = intel_crtc->histogram; + int index; + u32 dpstbin; + + for (index = 0; index < ARRAY_SIZE(histogram->bin_data); index++) { + dpstbin = intel_de_read(display, DPST_BIN(intel_crtc->pipe)); + if (!(dpstbin & DPST_BIN_BUSY)) { + histogram->bin_data[index] = dpstbin & DPST_BIN_DATA_MASK; + } else + return false; + } + return true; +} + +static void intel_histogram_handle_int_work(struct work_struct *work) +{ + struct intel_histogram *histogram = container_of(work, + struct intel_histogram, work.work); + struct intel_crtc *intel_crtc = histogram->crtc; + struct intel_display *display = to_intel_display(intel_crtc); + char event[] = "HISTOGRAM=1", pipe_id[21]; + char *histogram_event[] = { event, pipe_id, NULL }; + int retry; + + snprintf(pipe_id, sizeof(pipe_id), + "PIPE=%u", intel_crtc->base.base.id); + + /* + * 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 + */ + intel_de_rmw(display, DPST_CTL(intel_crtc->pipe), + DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_BIN_REG_MASK, 0); + for (retry = 0; retry < HISTOGRAM_BIN_READ_RETRY_COUNT; retry++) { + if (intel_histogram_get_data(intel_crtc)) { + /* Notify user for Histogram rediness */ + if (kobject_uevent_env(&display->drm->primary->kdev->kobj, + KOBJ_CHANGE, histogram_event)) + drm_err(display->drm, + "sending HISTOGRAM event failed\n"); + break; + } + } + if (retry >= HISTOGRAM_BIN_READ_RETRY_COUNT) { + drm_err(display->drm, "Histogram bin read failed with max retry\n"); + return; + } + + /* Enable histogram interrupt */ + intel_de_rmw(display, 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(display, DPST_GUARD(intel_crtc->pipe), + DPST_GUARD_HIST_EVENT_STATUS, 1); +} + +void intel_histogram_irq_handler(struct intel_display *display, enum pipe pipe) +{ + struct intel_crtc *intel_crtc = + to_intel_crtc(drm_crtc_from_index(display->drm, pipe)); + struct intel_histogram *histogram = intel_crtc->histogram; + struct drm_i915_private *i915 = to_i915(intel_crtc->base.dev); + + if (!histogram->enable) { + drm_err(display->drm, + "spurious interrupt, histogram not enabled\n"); + return; + } + + queue_delayed_work(i915->unordered_wq, + &histogram->work, 0); +} + int intel_histogram_atomic_check(struct intel_crtc *intel_crtc) { struct intel_histogram *histogram = intel_crtc->histogram; @@ -81,7 +159,7 @@ static int intel_histogram_enable(struct intel_crtc *intel_crtc) DPST_GUARD_THRESHOLD_GB_MASK | DPST_GUARD_INTERRUPT_DELAY_MASK | DPST_GUARD_HIST_INT_EN, DPST_GUARD_THRESHOLD_GB(gbandthreshold) | - DPST_GUARD_INTERRUPT_DELAY(HISTOGRAM_DEFAULT_GUARDBAND_DELAY) | + DPST_GUARD_INTERRUPT_DELAY(0x04) | DPST_GUARD_HIST_INT_EN); /* Clear pending interrupts has to be done on separate write */ @@ -114,6 +192,7 @@ static void intel_histogram_disable(struct intel_crtc *intel_crtc) intel_de_rmw(display, DPST_CTL(pipe), DPST_CTL_IE_HIST_EN, 0); + cancel_delayed_work(&histogram->work); histogram->enable = false; } @@ -169,6 +248,7 @@ void intel_histogram_finish(struct intel_crtc *intel_crtc) { struct intel_histogram *histogram = intel_crtc->histogram; + cancel_delayed_work_sync(&histogram->work); kfree(histogram); } @@ -186,5 +266,8 @@ int intel_histogram_init(struct intel_crtc *intel_crtc) histogram->crtc = intel_crtc; histogram->can_enable = false; + INIT_DEFERRABLE_WORK(&histogram->work, + intel_histogram_handle_int_work); + return 0; } diff --git a/drivers/gpu/drm/i915/display/intel_histogram.h b/drivers/gpu/drm/i915/display/intel_histogram.h index 9d66724f9c53..14f2425e3038 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 intel_display; +enum pipe; #define HISTOGRAM_BIN_COUNT 32 #define HISTOGRAM_IET_LENGTH 33 @@ -27,6 +29,7 @@ enum intel_global_hist_lut { }; int intel_histogram_atomic_check(struct intel_crtc *intel_crtc); +void intel_histogram_irq_handler(struct intel_display *display, 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 7a35be56b7ef..40a7c6a77bcc 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1605,7 +1605,7 @@ #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) @@ -1628,7 +1628,7 @@ #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) @@ -2470,6 +2470,7 @@ #define GEN12_DSB_1_INT REG_BIT(14) /* tgl+ */ #define GEN12_DSB_0_INT REG_BIT(13) /* tgl+ */ #define GEN12_DSB_INT(dsb_id) REG_BIT(13 + (dsb_id)) +#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 */