From patchwork Mon Dec 9 16:25:00 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: 13900024 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 AFD93E77184 for ; Mon, 9 Dec 2024 16:35:04 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 04AC110E4E7; Mon, 9 Dec 2024 16:35:04 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="GG0Cv5Tv"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7E88910E4E2; Mon, 9 Dec 2024 16:35:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1733762100; x=1765298100; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=JvSlRFnN+GFSPkaybJm4fBc8qBQnzAtDK+1ZxvzgSTg=; b=GG0Cv5TvoQMc2Sb3vxmiqZVDKUX+9jNCkPIjEeiUizoE7th54rj4ZLMz L4OJhbFsVPUcG2SS/zzxNcY/UzpjsOqJL0uoY9MwCKGJC1pkXmDCUcadu 2itpnZ0BYpsr1b6Y5H5wBdX/HmfyrRuPBr2+NnWumeRqooO2qiIw48QHy GEJZs9hX98q3S26+eLPF+k4X1M9IYW3mLAdkFqpSQ6vpzDFEr9LsY8052 QzLpLVWAGrAQySdjMjbtEZakJra33/DIHau7g/oTN6F1Jcj1MUXRsxMw3 9nxkFEhRPFW76q6IOG+VIP/PzFy3r2Ad7FnGb0lYNUiluKZiV4XtBLK0m Q==; X-CSE-ConnectionGUID: gMoCxBesQeuxQdSzQH/urQ== X-CSE-MsgGUID: oRpiju3fQ4GU0QGV4idgRA== X-IronPort-AV: E=McAfee;i="6700,10204,11281"; a="56551657" X-IronPort-AV: E=Sophos;i="6.12,219,1728975600"; d="scan'208";a="56551657" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Dec 2024 08:35:00 -0800 X-CSE-ConnectionGUID: Unu/1vxCSd2tIDa+9mosTw== X-CSE-MsgGUID: Zd0yQz49S/+LUMYZ0BC7aw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,219,1728975600"; d="scan'208";a="118371732" Received: from srr4-3-linux-106-armuthy.iind.intel.com ([10.190.238.56]) by fmviesa002.fm.intel.com with ESMTP; 09 Dec 2024 08:34:58 -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 , Suraj Kandpal Subject: [PATCH 06/10] drm/i915/histogram: histogram interrupt handling Date: Mon, 9 Dec 2024 21:55:00 +0530 Message-Id: <20241209162504.2146697-7-arun.r.murthy@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241209162504.2146697-1-arun.r.murthy@intel.com> References: <20241209162504.2146697-1-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 Reviewed-by: Suraj Kandpal --- .../gpu/drm/i915/display/intel_display_irq.c | 6 +- .../gpu/drm/i915/display/intel_histogram.c | 105 +++++++++++++++++- .../gpu/drm/i915/display/intel_histogram.h | 3 + drivers/gpu/drm/i915/i915_reg.h | 5 +- 4 files changed, 114 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 069043f9d894..ee3166d4c656 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" @@ -1180,6 +1181,9 @@ 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, @@ -1773,7 +1777,7 @@ 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 e481e49ebcf7..29e7bd928c9b 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 +29,102 @@ 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)) { + u32 *data; + struct drm_histogram *hist; + + data = kzalloc(sizeof(data) * sizeof(histogram->bin_data), GFP_KERNEL); + if (!data) + return; + memcpy(histogram->bin_data, data, sizeof(histogram->bin_data)); + hist = kzalloc(sizeof(struct drm_histogram), GFP_KERNEL); + if (!hist) + return; + hist->data_ptr = *data; + hist->nr_elements = sizeof(histogram->bin_data); + + drm_property_replace_global_blob(display->drm, + &intel_crtc->base.state->histogram_data, + sizeof(struct drm_histogram), + hist, &intel_crtc->base.base, + intel_crtc->base.histogram_data_property); + /* Notify user for Histogram readiness */ + 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; @@ -78,7 +174,7 @@ 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 */ @@ -111,6 +207,7 @@ 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; } @@ -181,6 +278,7 @@ void intel_histogram_finish(struct intel_crtc *intel_crtc) { struct intel_histogram *histogram = intel_crtc->histogram; + cancel_delayed_work_sync(&histogram->work); kfree(histogram); } @@ -198,5 +296,8 @@ 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 fb01ffe8903f..d7ddaab7ef54 100644 --- a/drivers/gpu/drm/i915/display/intel_histogram.h +++ b/drivers/gpu/drm/i915/display/intel_histogram.h @@ -10,6 +10,8 @@ struct drm_property_blob; struct intel_crtc; +struct intel_display; +enum pipe; #define HISTOGRAM_BIN_COUNT 32 #define HISTOGRAM_IET_LENGTH 33 @@ -28,6 +30,7 @@ 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, struct drm_property_blob *blob); diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index f48b5c809cec..836602e47511 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 */