From patchwork Mon Dec 9 16:24:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Murthy, Arun R" X-Patchwork-Id: 13900035 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 7E56EE77183 for ; Mon, 9 Dec 2024 16:34:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8EFCC10E4DA; Mon, 9 Dec 2024 16:34:57 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="TIV+2Lfu"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4BA2010E4DE; Mon, 9 Dec 2024 16:34:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1733762096; x=1765298096; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=gSWO0BS65263iBNp+UhzULaH112nk4XMjXNzIUyOJ7g=; b=TIV+2LfugcUaNT0B7LJNx8nLCfeuXsU3UdfGaOGQ3QIBJSm22gZRIjqi QRU29MJMAwVjDThSSSJVWfgTB7v94B8xEYSMNxQ6InDOZcCWqgV4UsN3o WdiAJ70vCm+IR3HdQn5Y9jlWdWppd/V8IYO7XMtd1wi8pYnhmbgAOLoNC 6zesD8qGFfF1tcczJVViwn2pk/thFajUVmSnSJri93lRn4VVXK2TsENDK SC3M+5JoXhJiDrpqKzqfYj63Q3K9J1IV6yw5KzFw5ZI9RxwNBvgQ1JVI7 8lKVGjdO6/OfeGTuk9rLcqfwY7l6D0QYL1p3s/XlsGDDLvKaDp/tAm8ed A==; X-CSE-ConnectionGUID: EbVVSp8SR7ms/WNnNUBl8w== X-CSE-MsgGUID: jlLOs2wWQ9mYEBK3Zc+8fw== X-IronPort-AV: E=McAfee;i="6700,10204,11281"; a="56551636" X-IronPort-AV: E=Sophos;i="6.12,219,1728975600"; d="scan'208";a="56551636" 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 08:34:56 -0800 X-CSE-ConnectionGUID: ziAvPUKwTOeJccYe8ptDIg== X-CSE-MsgGUID: xiB2bi//RfqxWZquc7NVBw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,219,1728975600"; d="scan'208";a="118371712" Received: from srr4-3-linux-106-armuthy.iind.intel.com ([10.190.238.56]) by fmviesa002.fm.intel.com with ESMTP; 09 Dec 2024 08:34:54 -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 04/10] drm/i915/histogram: Add support for histogram Date: Mon, 9 Dec 2024 21:54:58 +0530 Message-Id: <20241209162504.2146697-5-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: 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" Statistics is generated from the image frame that is coming to display and an event is sent to user after reading this histogram data. This statistics/histogram is then shared with the user upon getting a request from user. User can then use this histogram and generate an enhancement factor. This enhancement factor can be multiplied/added with the incoming pixel data frame. v2: forward declaration in header file along with error handling (Jani) v3: Replaced i915 with intel_display (Suraj) v4: Removed dithering enable/disable (Vandita) New patch for histogram register definitions (Suraj) v5: IET LUT pgm follow the seq in spec and removed change to TC at end (Suraj) Signed-off-by: Arun R Murthy Reviewed-by: Suraj Kandpal --- drivers/gpu/drm/i915/Makefile | 1 + .../drm/i915/display/intel_display_types.h | 2 + .../gpu/drm/i915/display/intel_histogram.c | 202 ++++++++++++++++++ .../gpu/drm/i915/display/intel_histogram.h | 37 ++++ 4 files changed, 242 insertions(+) create mode 100644 drivers/gpu/drm/i915/display/intel_histogram.c create mode 100644 drivers/gpu/drm/i915/display/intel_histogram.h diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index e465828d748f..97141b4def3b 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -267,6 +267,7 @@ i915-y += \ display/intel_hdcp.o \ display/intel_hdcp_gsc.o \ display/intel_hdcp_gsc_message.o \ + display/intel_histogram.o \ display/intel_hotplug.o \ display/intel_hotplug_irq.o \ display/intel_hti.o \ diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index 167aa8ec4948..0f50081b9957 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -1425,6 +1425,8 @@ struct intel_crtc { /* for loading single buffered registers during vblank */ struct pm_qos_request vblank_pm_qos; + struct intel_histogram *histogram; + #ifdef CONFIG_DEBUG_FS struct intel_pipe_crc pipe_crc; #endif diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c b/drivers/gpu/drm/i915/display/intel_histogram.c new file mode 100644 index 000000000000..e481e49ebcf7 --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_histogram.c @@ -0,0 +1,202 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2024 Intel Corporation + */ + +#include +#include +#include + +#include "i915_reg.h" +#include "i915_drv.h" +#include "intel_de.h" +#include "intel_display.h" +#include "intel_display_types.h" +#include "intel_histogram.h" +#include "intel_histogram_regs.h" + +/* 3.0% of the pipe's current pixel count, hw does x4 */ +#define HISTOGRAM_GUARDBAND_THRESHOLD_DEFAULT 300 +/* Precision factor for threshold guardband */ +#define HISTOGRAM_GUARDBAND_PRECISION_FACTOR 10000 +#define HISTOGRAM_DEFAULT_GUARDBAND_DELAY 0x04 + +struct intel_histogram { + struct intel_crtc *crtc; + struct delayed_work work; + bool enable; + bool can_enable; + u32 bin_data[HISTOGRAM_BIN_COUNT]; +}; + +int intel_histogram_atomic_check(struct intel_crtc *intel_crtc) +{ + struct intel_histogram *histogram = intel_crtc->histogram; + + /* TODO: Restrictions for enabling histogram */ + histogram->can_enable = true; + + return 0; +} + +static int intel_histogram_enable(struct intel_crtc *intel_crtc) +{ + struct intel_display *display = to_intel_display(intel_crtc); + struct intel_histogram *histogram = intel_crtc->histogram; + int pipe = intel_crtc->pipe; + u64 res; + u32 gbandthreshold; + + if (!histogram || !histogram->can_enable) + return -EINVAL; + + if (histogram->enable) + return 0; + + /* enable histogram, clear DPST_CTL bin reg func select to TC */ + intel_de_rmw(display, DPST_CTL(pipe), + DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_IE_HIST_EN | + DPST_CTL_HIST_MODE | DPST_CTL_IE_TABLE_VALUE_FORMAT | + DPST_CTL_ENHANCEMENT_MODE_MASK | DPST_CTL_IE_MODI_TABLE_EN, + DPST_CTL_BIN_REG_FUNC_TC | DPST_CTL_IE_HIST_EN | + DPST_CTL_HIST_MODE_HSV | + DPST_CTL_IE_TABLE_VALUE_FORMAT_1INT_9FRAC | + DPST_CTL_EN_MULTIPLICATIVE | DPST_CTL_IE_MODI_TABLE_EN); + + /* Re-Visit: check if wait for one vblank is required */ + drm_crtc_wait_one_vblank(&intel_crtc->base); + + /* TODO: Program GuardBand Threshold needs to be moved to modeset path */ + res = (intel_crtc->config->hw.adjusted_mode.vtotal * + intel_crtc->config->hw.adjusted_mode.htotal); + + gbandthreshold = (res * HISTOGRAM_GUARDBAND_THRESHOLD_DEFAULT) / + HISTOGRAM_GUARDBAND_PRECISION_FACTOR; + + /* Enable histogram interrupt mode */ + intel_de_rmw(display, DPST_GUARD(pipe), + 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_HIST_INT_EN); + + /* Clear pending interrupts has to be done on separate write */ + intel_de_rmw(display, DPST_GUARD(pipe), + DPST_GUARD_HIST_EVENT_STATUS, 1); + + histogram->enable = true; + + return 0; +} + +static void intel_histogram_disable(struct intel_crtc *intel_crtc) +{ + struct intel_display *display = to_intel_display(intel_crtc); + struct intel_histogram *histogram = intel_crtc->histogram; + int pipe = intel_crtc->pipe; + + if (!histogram) + return; + + /* If already disabled return */ + if (histogram->enable) + return; + + /* Clear pending interrupts and disable interrupts */ + intel_de_rmw(display, DPST_GUARD(pipe), + DPST_GUARD_HIST_INT_EN | DPST_GUARD_HIST_EVENT_STATUS, 0); + + /* disable DPST_CTL Histogram mode */ + intel_de_rmw(display, DPST_CTL(pipe), + DPST_CTL_IE_HIST_EN, 0); + + histogram->enable = false; +} + +int intel_histogram_update(struct intel_crtc *intel_crtc, bool enable) +{ + if (enable) + return intel_histogram_enable(intel_crtc); + + intel_histogram_disable(intel_crtc); + return 0; +} + +int intel_histogram_set_iet_lut(struct intel_crtc *intel_crtc, + struct drm_property_blob *blob) +{ + struct intel_histogram *histogram = intel_crtc->histogram; + struct intel_display *display = to_intel_display(intel_crtc); + int pipe = intel_crtc->pipe; + int i = 0; + struct drm_iet *iet; + u32 *data; + int ret; + + if (!histogram) + return -EINVAL; + + if (!histogram->enable) { + drm_err(display->drm, "histogram not enabled"); + return -EINVAL; + } + + if (!data) { + drm_err(display->drm, "enhancement LUT data is NULL"); + return -EINVAL; + } + + /* Set DPST_CTL Bin Reg function select to IE & wait for a vblabk */ + intel_de_rmw(display, DPST_CTL(pipe), + DPST_CTL_BIN_REG_FUNC_SEL, DPST_CTL_BIN_REG_FUNC_IE); + + drm_crtc_wait_one_vblank(&intel_crtc->base); + + /* Set DPST_CTL Bin Register Index to 0 */ + intel_de_rmw(display, DPST_CTL(pipe), + DPST_CTL_BIN_REG_MASK, DPST_CTL_BIN_REG_CLEAR); + + iet = (struct drm_iet *)blob->data; + data = kzalloc(sizeof(data) * iet->nr_elements, GFP_KERNEL); + if (!data) + return -ENOMEM; + ret = copy_from_user(data, (uint32_t __user *)(unsigned long)iet->data_ptr, + sizeof(uint32_t) * iet->nr_elements); + if (ret) + return ret; + + for (i = 0; i < HISTOGRAM_IET_LENGTH; i++) { + intel_de_rmw(display, DPST_BIN(pipe), + DPST_BIN_DATA_MASK, data[i]); + drm_dbg_atomic(display->drm, "iet_lut[%d]=%x\n", i, data[i]); + } + kfree(data); + drm_property_blob_put(intel_crtc->base.state->histogram_iet); + + return 0; +} + +void intel_histogram_finish(struct intel_crtc *intel_crtc) +{ + struct intel_histogram *histogram = intel_crtc->histogram; + + kfree(histogram); +} + +int intel_histogram_init(struct intel_crtc *intel_crtc) +{ + struct intel_histogram *histogram; + + /* Allocate histogram internal struct */ + histogram = kzalloc(sizeof(*histogram), GFP_KERNEL); + if (!histogram) { + return -ENOMEM; + } + + intel_crtc->histogram = histogram; + histogram->crtc = intel_crtc; + histogram->can_enable = false; + + return 0; +} diff --git a/drivers/gpu/drm/i915/display/intel_histogram.h b/drivers/gpu/drm/i915/display/intel_histogram.h new file mode 100644 index 000000000000..fb01ffe8903f --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_histogram.h @@ -0,0 +1,37 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2024 Intel Corporation + */ + +#ifndef __INTEL_HISTOGRAM_H__ +#define __INTEL_HISTOGRAM_H__ + +#include + +struct drm_property_blob; +struct intel_crtc; + +#define HISTOGRAM_BIN_COUNT 32 +#define HISTOGRAM_IET_LENGTH 33 + +enum intel_global_hist_status { + INTEL_HISTOGRAM_ENABLE, + INTEL_HISTOGRAM_DISABLE, +}; + +enum intel_global_histogram { + INTEL_HISTOGRAM, +}; + +enum intel_global_hist_lut { + INTEL_HISTOGRAM_PIXEL_FACTOR, +}; + +int intel_histogram_atomic_check(struct intel_crtc *intel_crtc); +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); +int intel_histogram_init(struct intel_crtc *intel_crtc); +void intel_histogram_finish(struct intel_crtc *intel_crtc); + +#endif /* __INTEL_HISTOGRAM_H__ */