From patchwork Sun Aug 30 14:20:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rodrigo Siqueira X-Patchwork-Id: 11745131 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8C859913 for ; Sun, 30 Aug 2020 14:20:49 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 6B114206E3 for ; Sun, 30 Aug 2020 14:20:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Bp+/EYte" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6B114206E3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DD3A86E46E; Sun, 30 Aug 2020 14:20:47 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-qk1-x72d.google.com (mail-qk1-x72d.google.com [IPv6:2607:f8b0:4864:20::72d]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5627C6E46E for ; Sun, 30 Aug 2020 14:20:38 +0000 (UTC) Received: by mail-qk1-x72d.google.com with SMTP id o64so3940982qkb.10 for ; Sun, 30 Aug 2020 07:20:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=6QYIvPqoXZFuHiNwMm7lBlgWmugcg3gCoZ50uTYyET8=; b=Bp+/EYtegsSH1MenBovVKZeov/HX1ij001weOVLQMqJ7GIDES6xgzU1Emt6PSNm9mv CgJY2PAftUs8dbiiMoCggDsc5ThbrGZanhGO6jsFy4fSjHk8z/diTEAEUoL+7jNOhsTl iUlDnsAnT8bVBUcm/PvdlwxF9UE47uqGkDd+1kYjQz1J0ejEs1y9Uxmjy1vj+gJaOyt2 f/76FWwtT83fKS/4JVNDBtca9UROZfxfNhPvE6v0mH+iSJLxs68k4xL4nhNCt+qTEZt7 HnwQnbCVIyUb3mmyvFIMLX6RM0jp/zHz8MUaGD/dWBYt0HKWJzArmTH7gpAc54Ngw7z+ RPJw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=6QYIvPqoXZFuHiNwMm7lBlgWmugcg3gCoZ50uTYyET8=; b=UQA2gEXBO9lHVeMQGqYDl/V+x5l59aL4qNIhKzAH6I43ikdQ/U47XP+CY7u0iMNzU4 meKAGzTdKp3mvUo8Rzvs3jPghm0Ofh5DKrXajPInnrk744hY28O5+kNc6iulZBzFGJl0 SEx8ceQg/VXs5xm5kBTRQ6Gtsa/vOrjgTRkBleCTPoul7Hui2nygqA34/pYMZboBF/hj /gIlAArQeHVGZPTR7VRrOL5j636TNbEBtU9ZuDhSqyJq72Xfaw18e9eso0X1NbMPQtcJ tj2tlK2OrVMFmPFBB+FuTycnEzM29C3XCq/F6LHACrCRE8fPwKWDEPrl7/ZqAmpP3w5S 0UHw== X-Gm-Message-State: AOAM531qCosjtVdGIaeizcQygeDf7ix8em82ESwkzqx41YeDk+R/KT+H 4ijEUpDS67H0/AzERuSMFyE= X-Google-Smtp-Source: ABdhPJx1liXFw967+2pO8WLjlMoFiUcOJvZoiVlSWCCdmjK7fKDJjRJI+zzoXxvqC2uxIeU7UO75Lg== X-Received: by 2002:a37:9c16:: with SMTP id f22mr6976278qke.331.1598797237339; Sun, 30 Aug 2020 07:20:37 -0700 (PDT) Received: from atma2.hitronhub.home ([2607:fea8:56e0:6d60::2db6]) by smtp.gmail.com with ESMTPSA id o72sm5884861qka.113.2020.08.30.07.20.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 30 Aug 2020 07:20:37 -0700 (PDT) From: Rodrigo Siqueira To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH v6 3/3] drm/vkms: Add support for writeback Date: Sun, 30 Aug 2020 10:20:00 -0400 Message-Id: <20200830142000.146706-4-rodrigosiqueiramelo@gmail.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200830142000.146706-1-rodrigosiqueiramelo@gmail.com> References: <20200830142000.146706-1-rodrigosiqueiramelo@gmail.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: , Cc: daniels@collabora.com, Liviu Dudau , Leandro Ribeiro , melissa.srw@gmail.com, Emil Velikov Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This patch implements the necessary functions to add writeback support for vkms. This feature is useful for testing compositors if you don't have hardware with writeback support. Change in V4 (Emil and Melissa): - Move signal completion above drm_crtc_add_crc_entry() - Make writeback always available - Use appropriate namespace - Drop fb check in vkms_wb_atomic_commit - Make vkms_set_composer visible for writeback code - Enable composer operation on prepare_job and disable it on cleanup_job - Drop extra space at the end of the file - Rebase Change in V3 (Daniel): - If writeback is enabled, compose everything into the writeback buffer instead of CRC private buffer - Guarantees that the CRC will match exactly what we have in the writeback buffer. Change in V2: - Rework signal completion (Brian) - Integrates writeback with active_planes (Daniel) - Compose cursor (Daniel) Signed-off-by: Rodrigo Siqueira Reviewed-by: Liviu Dudau --- drivers/gpu/drm/vkms/Makefile | 9 +- drivers/gpu/drm/vkms/vkms_composer.c | 21 +++- drivers/gpu/drm/vkms/vkms_drv.h | 11 +- drivers/gpu/drm/vkms/vkms_output.c | 4 + drivers/gpu/drm/vkms/vkms_writeback.c | 142 ++++++++++++++++++++++++++ 5 files changed, 180 insertions(+), 7 deletions(-) create mode 100644 drivers/gpu/drm/vkms/vkms_writeback.c diff --git a/drivers/gpu/drm/vkms/Makefile b/drivers/gpu/drm/vkms/Makefile index 0b767d7efa24..333d3cead0e3 100644 --- a/drivers/gpu/drm/vkms/Makefile +++ b/drivers/gpu/drm/vkms/Makefile @@ -1,4 +1,11 @@ # SPDX-License-Identifier: GPL-2.0-only -vkms-y := vkms_drv.o vkms_plane.o vkms_output.o vkms_crtc.o vkms_gem.o vkms_composer.o +vkms-y := \ + vkms_drv.o \ + vkms_plane.o \ + vkms_output.o \ + vkms_crtc.o \ + vkms_gem.o \ + vkms_composer.o \ + vkms_writeback.o obj-$(CONFIG_DRM_VKMS) += vkms.o diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c index c5b32fe5870f..33c031f27c2c 100644 --- a/drivers/gpu/drm/vkms/vkms_composer.c +++ b/drivers/gpu/drm/vkms/vkms_composer.c @@ -186,16 +186,17 @@ void vkms_composer_worker(struct work_struct *work) struct vkms_output *out = drm_crtc_to_vkms_output(crtc); struct vkms_composer *primary_composer = NULL; struct vkms_composer *cursor_composer = NULL; + bool crc_pending, wb_pending; void *vaddr_out = NULL; u32 crc32 = 0; u64 frame_start, frame_end; - bool crc_pending; int ret; spin_lock_irq(&out->composer_lock); frame_start = crtc_state->frame_start; frame_end = crtc_state->frame_end; crc_pending = crtc_state->crc_pending; + wb_pending = crtc_state->wb_pending; crtc_state->frame_start = 0; crtc_state->frame_end = 0; crtc_state->crc_pending = false; @@ -217,22 +218,32 @@ void vkms_composer_worker(struct work_struct *work) if (!primary_composer) return; + if (wb_pending) + vaddr_out = crtc_state->active_writeback; + ret = compose_planes(&vaddr_out, primary_composer, cursor_composer); if (ret) { - if (ret == -EINVAL) + if (ret == -EINVAL && !wb_pending) kfree(vaddr_out); return; } crc32 = compute_crc(vaddr_out, primary_composer); + if (wb_pending) { + drm_writeback_signal_completion(&out->wb_connector, 0); + spin_lock_irq(&out->composer_lock); + crtc_state->wb_pending = false; + spin_unlock_irq(&out->composer_lock); + } else { + kfree(vaddr_out); + } + /* * The worker can fall behind the vblank hrtimer, make sure we catch up. */ while (frame_start <= frame_end) drm_crtc_add_crc_entry(crtc, true, frame_start++, &crc32); - - kfree(vaddr_out); } static const char * const pipe_crc_sources[] = {"auto"}; @@ -275,7 +286,7 @@ int vkms_verify_crc_source(struct drm_crtc *crtc, const char *src_name, return 0; } -static void vkms_set_composer(struct vkms_output *out, bool enabled) +void vkms_set_composer(struct vkms_output *out, bool enabled) { bool old_enabled; diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h index f4036bb0b9a8..641d8bc52a3a 100644 --- a/drivers/gpu/drm/vkms/vkms_drv.h +++ b/drivers/gpu/drm/vkms/vkms_drv.h @@ -8,6 +8,7 @@ #include #include #include +#include #define XRES_MIN 20 #define YRES_MIN 20 @@ -19,6 +20,7 @@ #define YRES_MAX 8192 extern bool enable_cursor; +extern bool enable_writeback; struct vkms_composer { struct drm_framebuffer fb; @@ -52,9 +54,11 @@ struct vkms_crtc_state { int num_active_planes; /* stack of active planes for crc computation, should be in z order */ struct vkms_plane_state **active_planes; + void *active_writeback; - /* below three are protected by vkms_output.composer_lock */ + /* below four are protected by vkms_output.composer_lock */ bool crc_pending; + bool wb_pending; u64 frame_start; u64 frame_end; }; @@ -63,6 +67,7 @@ struct vkms_output { struct drm_crtc crtc; struct drm_encoder encoder; struct drm_connector connector; + struct drm_writeback_connector wb_connector; struct hrtimer vblank_hrtimer; ktime_t period_ns; struct drm_pending_vblank_event *event; @@ -143,5 +148,9 @@ int vkms_verify_crc_source(struct drm_crtc *crtc, const char *source_name, /* Composer Support */ void vkms_composer_worker(struct work_struct *work); +void vkms_set_composer(struct vkms_output *out, bool enabled); + +/* Writeback */ +int vkms_enable_writeback_connector(struct vkms_device *vkmsdev); #endif /* _VKMS_DRV_H_ */ diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c index 85afb77e97f0..4a1848b0318f 100644 --- a/drivers/gpu/drm/vkms/vkms_output.c +++ b/drivers/gpu/drm/vkms/vkms_output.c @@ -80,6 +80,10 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index) goto err_attach; } + ret = vkms_enable_writeback_connector(vkmsdev); + if (ret) + DRM_ERROR("Failed to init writeback connector\n"); + drm_mode_config_reset(dev); return 0; diff --git a/drivers/gpu/drm/vkms/vkms_writeback.c b/drivers/gpu/drm/vkms/vkms_writeback.c new file mode 100644 index 000000000000..094fa4aa061d --- /dev/null +++ b/drivers/gpu/drm/vkms/vkms_writeback.c @@ -0,0 +1,142 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include "vkms_drv.h" +#include +#include +#include +#include +#include + +static const u32 vkms_wb_formats[] = { + DRM_FORMAT_XRGB8888, +}; + +static const struct drm_connector_funcs vkms_wb_connector_funcs = { + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = drm_connector_cleanup, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static int vkms_wb_encoder_atomic_check(struct drm_encoder *encoder, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + struct drm_framebuffer *fb; + const struct drm_display_mode *mode = &crtc_state->mode; + + if (!conn_state->writeback_job || !conn_state->writeback_job->fb) + return 0; + + fb = conn_state->writeback_job->fb; + if (fb->width != mode->hdisplay || fb->height != mode->vdisplay) { + DRM_DEBUG_KMS("Invalid framebuffer size %ux%u\n", + fb->width, fb->height); + return -EINVAL; + } + + if (fb->format->format != vkms_wb_formats[0]) { + struct drm_format_name_buf format_name; + + DRM_DEBUG_KMS("Invalid pixel format %s\n", + drm_get_format_name(fb->format->format, + &format_name)); + return -EINVAL; + } + + return 0; +} + +static const struct drm_encoder_helper_funcs vkms_wb_encoder_helper_funcs = { + .atomic_check = vkms_wb_encoder_atomic_check, +}; + +static int vkms_wb_connector_get_modes(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + + return drm_add_modes_noedid(connector, dev->mode_config.max_width, + dev->mode_config.max_height); +} + +static int vkms_wb_prepare_job(struct drm_writeback_connector *wb_connector, + struct drm_writeback_job *job) +{ + struct vkms_gem_object *vkms_obj; + struct drm_gem_object *gem_obj; + int ret; + + if (!job->fb) + return 0; + + gem_obj = drm_gem_fb_get_obj(job->fb, 0); + ret = vkms_gem_vmap(gem_obj); + if (ret) { + DRM_ERROR("vmap failed: %d\n", ret); + return ret; + } + + vkms_obj = drm_gem_to_vkms_gem(gem_obj); + job->priv = vkms_obj->vaddr; + + return 0; +} + +static void vkms_wb_cleanup_job(struct drm_writeback_connector *connector, + struct drm_writeback_job *job) +{ + struct drm_gem_object *gem_obj; + struct vkms_device *vkmsdev; + + if (!job->fb) + return; + + gem_obj = drm_gem_fb_get_obj(job->fb, 0); + vkms_gem_vunmap(gem_obj); + + vkmsdev = drm_device_to_vkms_device(gem_obj->dev); + vkms_set_composer(&vkmsdev->output, false); +} + +static void vkms_wb_atomic_commit(struct drm_connector *conn, + struct drm_connector_state *state) +{ + struct vkms_device *vkmsdev = drm_device_to_vkms_device(conn->dev); + struct vkms_output *output = &vkmsdev->output; + struct drm_writeback_connector *wb_conn = &output->wb_connector; + struct drm_connector_state *conn_state = wb_conn->base.state; + struct vkms_crtc_state *crtc_state = output->composer_state; + + if (!conn_state) + return; + + vkms_set_composer(&vkmsdev->output, true); + + spin_lock_irq(&output->composer_lock); + crtc_state->active_writeback = conn_state->writeback_job->priv; + crtc_state->wb_pending = true; + spin_unlock_irq(&output->composer_lock); + drm_writeback_queue_job(wb_conn, state); +} + +static const struct drm_connector_helper_funcs vkms_wb_conn_helper_funcs = { + .get_modes = vkms_wb_connector_get_modes, + .prepare_writeback_job = vkms_wb_prepare_job, + .cleanup_writeback_job = vkms_wb_cleanup_job, + .atomic_commit = vkms_wb_atomic_commit, +}; + +int vkms_enable_writeback_connector(struct vkms_device *vkmsdev) +{ + struct drm_writeback_connector *wb = &vkmsdev->output.wb_connector; + + vkmsdev->output.wb_connector.encoder.possible_crtcs = 1; + drm_connector_helper_add(&wb->base, &vkms_wb_conn_helper_funcs); + + return drm_writeback_connector_init(&vkmsdev->drm, wb, + &vkms_wb_connector_funcs, + &vkms_wb_encoder_helper_funcs, + vkms_wb_formats, + ARRAY_SIZE(vkms_wb_formats)); +}