From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932328AbcJZI60 (ORCPT ); Wed, 26 Oct 2016 04:58:26 -0400 Received: from foss.arm.com ([217.140.101.70]:34292 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754022AbcJZI4I (ORCPT ); Wed, 26 Oct 2016 04:56:08 -0400 From: Brian Starkey To: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Subject: [RFC PATCH v2 6/9] drm: mali-dp: Add writeback connector Date: Wed, 26 Oct 2016 09:55:05 +0100 Message-Id: <1477472108-27222-7-git-send-email-brian.starkey@arm.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1477472108-27222-1-git-send-email-brian.starkey@arm.com> References: <1477472108-27222-1-git-send-email-brian.starkey@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Mali-DP has a memory writeback engine which can be used to write the composition result to a memory buffer. Expose this functionality as a DRM writeback connector on supported hardware. Signed-off-by: Brian Starkey --- drivers/gpu/drm/arm/Makefile | 1 + drivers/gpu/drm/arm/malidp_crtc.c | 21 +++ drivers/gpu/drm/arm/malidp_drv.c | 28 +++- drivers/gpu/drm/arm/malidp_drv.h | 7 + drivers/gpu/drm/arm/malidp_hw.c | 40 ++++- drivers/gpu/drm/arm/malidp_mw.c | 297 +++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/arm/malidp_mw.h | 25 ++++ 7 files changed, 413 insertions(+), 6 deletions(-) create mode 100644 drivers/gpu/drm/arm/malidp_mw.c create mode 100644 drivers/gpu/drm/arm/malidp_mw.h diff --git a/drivers/gpu/drm/arm/Makefile b/drivers/gpu/drm/arm/Makefile index bb8b158..3bf31d1 100644 --- a/drivers/gpu/drm/arm/Makefile +++ b/drivers/gpu/drm/arm/Makefile @@ -1,4 +1,5 @@ hdlcd-y := hdlcd_drv.o hdlcd_crtc.o obj-$(CONFIG_DRM_HDLCD) += hdlcd.o mali-dp-y := malidp_drv.o malidp_hw.o malidp_planes.o malidp_crtc.o +mali-dp-y += malidp_mw.o obj-$(CONFIG_DRM_MALI_DISPLAY) += mali-dp.o diff --git a/drivers/gpu/drm/arm/malidp_crtc.c b/drivers/gpu/drm/arm/malidp_crtc.c index 08e6a71..aadc223 100644 --- a/drivers/gpu/drm/arm/malidp_crtc.c +++ b/drivers/gpu/drm/arm/malidp_crtc.c @@ -68,6 +68,18 @@ static void malidp_crtc_enable(struct drm_crtc *crtc) clk_set_rate(hwdev->pxlclk, crtc->state->adjusted_mode.crtc_clock * 1000); hwdev->modeset(hwdev, &vm); + /* + * We should always disable the memory write when leaving config mode, + * otherwise the hardware will start writing right away - possibly with + * a stale config, and definitely before we've had a chance to configure + * the planes. + * If the memory write needs to be enabled, that will get taken care + * of later during the atomic commit + */ + if (hwdev->disable_memwrite) { + DRM_DEV_DEBUG_DRIVER(crtc->dev->dev, "Disable memwrite\n"); + hwdev->disable_memwrite(hwdev); + } hwdev->leave_config_mode(hwdev); drm_crtc_vblank_on(crtc); } @@ -157,6 +169,15 @@ static int malidp_crtc_atomic_check(struct drm_crtc *crtc, } } + /* If only the writeback routing has changed, we don't need a modeset */ + if (state->connectors_changed) { + u32 old_mask = crtc->state->connector_mask; + u32 new_mask = state->connector_mask; + if ((old_mask ^ new_mask) == + (1 << drm_connector_index(&malidp->mw_connector))) + state->connectors_changed = false; + } + return 0; } diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c index f63a4df..cdefbab 100644 --- a/drivers/gpu/drm/arm/malidp_drv.c +++ b/drivers/gpu/drm/arm/malidp_drv.c @@ -28,6 +28,7 @@ #include #include "malidp_drv.h" +#include "malidp_mw.h" #include "malidp_regs.h" #include "malidp_hw.h" @@ -92,6 +93,14 @@ static void malidp_atomic_commit_tail(struct drm_atomic_state *state) drm_atomic_helper_commit_modeset_disables(drm, state); drm_atomic_helper_commit_modeset_enables(drm, state); + + /* + * The order here is important. We must configure memory-write after + * the CRTC is already enabled, so that its configuration update is + * gated on the next CVAL. + */ + malidp_mw_atomic_commit(drm, state); + drm_atomic_helper_commit_planes(drm, state, 0); malidp_atomic_commit_hw_done(state); @@ -147,12 +156,20 @@ static int malidp_init(struct drm_device *drm) drm->mode_config.helper_private = &malidp_mode_config_helpers; ret = malidp_crtc_init(drm); - if (ret) { - drm_mode_config_cleanup(drm); - return ret; - } + if (ret) + goto crtc_fail; + + ret = malidp_mw_connector_init(drm); + if (ret) + goto mw_fail; return 0; + +mw_fail: + malidp_de_planes_destroy(drm); +crtc_fail: + drm_mode_config_cleanup(drm); + return ret; } static void malidp_fini(struct drm_device *drm) @@ -357,6 +374,9 @@ static int malidp_bind(struct device *dev) atomic_set(&malidp->config_valid, 0); init_waitqueue_head(&malidp->wq); + INIT_LIST_HEAD(&malidp->finished_mw_jobs); + spin_lock_init(&malidp->mw_lock); + ret = malidp_init(drm); if (ret < 0) goto init_fail; diff --git a/drivers/gpu/drm/arm/malidp_drv.h b/drivers/gpu/drm/arm/malidp_drv.h index 9fc8a2e..0dce0cf 100644 --- a/drivers/gpu/drm/arm/malidp_drv.h +++ b/drivers/gpu/drm/arm/malidp_drv.h @@ -22,8 +22,15 @@ struct malidp_drm { struct drm_fbdev_cma *fbdev; struct list_head event_list; struct drm_crtc crtc; + struct drm_encoder mw_encoder; + struct drm_connector mw_connector; wait_queue_head_t wq; atomic_t config_valid; + + struct malidp_mw_job *current_mw; + /* lock for protecting the finished_mw_jobs list */ + spinlock_t mw_lock; + struct list_head finished_mw_jobs; }; #define crtc_to_malidp_device(x) container_of(x, struct malidp_drm, crtc) diff --git a/drivers/gpu/drm/arm/malidp_hw.c b/drivers/gpu/drm/arm/malidp_hw.c index 5004988..1689547 100644 --- a/drivers/gpu/drm/arm/malidp_hw.c +++ b/drivers/gpu/drm/arm/malidp_hw.c @@ -20,6 +20,7 @@ #include "malidp_drv.h" #include "malidp_hw.h" +#include "malidp_mw.h" static const struct malidp_format_id malidp500_de_formats[] = { /* fourcc, layers supporting the format, internal id */ @@ -548,6 +549,7 @@ const struct malidp_hw_device malidp_device[MALIDP_MAX_DEVICES] = { .se_irq_map = { .irq_mask = MALIDP550_SE_IRQ_EOW | MALIDP550_SE_IRQ_AXI_ERR, + .vsync_irq = MALIDP550_SE_IRQ_EOW, }, .dc_irq_map = { .irq_mask = MALIDP550_DC_IRQ_CONF_VALID | @@ -689,7 +691,9 @@ static irqreturn_t malidp_se_irq(int irq, void *arg) struct drm_device *drm = arg; struct malidp_drm *malidp = drm->dev_private; struct malidp_hw_device *hwdev = malidp->dev; + const struct malidp_irq_map *se = &hwdev->map.se_irq_map; u32 status, mask; + irqreturn_t ret = IRQ_HANDLED; status = malidp_hw_read(hwdev, hwdev->map.se_base + MALIDP_REG_STATUS); if (!(status & hwdev->map.se_irq_map.irq_mask)) @@ -698,15 +702,47 @@ static irqreturn_t malidp_se_irq(int irq, void *arg) mask = malidp_hw_read(hwdev, hwdev->map.se_base + MALIDP_REG_MASKIRQ); status = malidp_hw_read(hwdev, hwdev->map.se_base + MALIDP_REG_STATUS); status &= mask; - /* ToDo: status decoding and firing up of VSYNC and page flip events */ + + if (status & se->vsync_irq) { + unsigned long irqflags; + /* + * We can't unreference the framebuffer here, so we queue it + * up on our threaded handler. + */ + spin_lock_irqsave(&malidp->mw_lock, irqflags); + list_add_tail(&malidp->current_mw->list, + &malidp->finished_mw_jobs); + malidp->current_mw = NULL; + spin_unlock_irqrestore(&malidp->mw_lock, irqflags); + + ret = IRQ_WAKE_THREAD; + } malidp_hw_clear_irq(hwdev, MALIDP_SE_BLOCK, status); - return IRQ_HANDLED; + return ret; } static irqreturn_t malidp_se_irq_thread_handler(int irq, void *arg) { + struct drm_device *drm = arg; + struct malidp_drm *malidp = drm->dev_private; + struct list_head finished; + struct malidp_mw_job *tmp, *pos; + unsigned long irqflags; + + INIT_LIST_HEAD(&finished); + + spin_lock_irqsave(&malidp->mw_lock, irqflags); + list_splice_tail_init(&malidp->finished_mw_jobs, + &finished); + spin_unlock_irqrestore(&malidp->mw_lock, irqflags); + + list_for_each_entry_safe(pos, tmp, &finished, list) { + list_del(&pos->list); + malidp_mw_job_cleanup(drm, pos); + } + return IRQ_HANDLED; } diff --git a/drivers/gpu/drm/arm/malidp_mw.c b/drivers/gpu/drm/arm/malidp_mw.c new file mode 100644 index 0000000..69e423c --- /dev/null +++ b/drivers/gpu/drm/arm/malidp_mw.c @@ -0,0 +1,297 @@ +/* + * (C) COPYRIGHT 2016 ARM Limited. All rights reserved. + * Author: Brian Starkey + * + * This program is free software and is provided to you under the terms of the + * GNU General Public License version 2 as published by the Free Software + * Foundation, and any use by you of this program is subject to the terms + * of such GNU licence. + * + * ARM Mali DP Writeback connector implementation + */ +#include +#include +#include +#include +#include +#include +#include +#include + +#include "malidp_drv.h" +#include "malidp_hw.h" +#include "malidp_mw.h" + +#define mw_conn_to_malidp_device(x) container_of(x, struct malidp_drm, mw_connector) +#define to_mw_state(_state) (struct malidp_mw_connector_state *)(_state) + +struct malidp_mw_connector_state { + struct drm_connector_state base; + struct malidp_mw_job *job; + dma_addr_t addrs[2]; + s32 pitches[2]; + u8 format; + u8 n_planes; +}; + +void malidp_mw_job_cleanup(struct drm_device *drm, + struct malidp_mw_job *job) +{ + DRM_DEV_DEBUG_DRIVER(drm->dev, "MW job cleanup %p\n", job); + drm_framebuffer_unreference(job->fb); + kfree(job); +} + +static int malidp_mw_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 enum drm_mode_status +malidp_mw_connector_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + struct drm_device *dev = connector->dev; + struct drm_mode_config *mode_config = &dev->mode_config; + int w = mode->hdisplay, h = mode->vdisplay; + + if ((w < mode_config->min_width) || (w > mode_config->max_width)) + return MODE_BAD_HVALUE; + + if ((h < mode_config->min_height) || (h > mode_config->max_height)) + return MODE_BAD_VVALUE; + + return MODE_OK; +} + +const struct drm_connector_helper_funcs malidp_mw_connector_helper_funcs = { + .get_modes = malidp_mw_connector_get_modes, + .mode_valid = malidp_mw_connector_mode_valid, +}; + +static enum drm_connector_status +malidp_mw_connector_detect(struct drm_connector *connector, bool force) +{ + return connector_status_disconnected; +} + +static void malidp_mw_connector_destroy(struct drm_connector *connector) +{ + drm_connector_cleanup(connector); +} + +static struct drm_connector_state * +malidp_mw_connector_duplicate_state(struct drm_connector *connector) +{ + struct malidp_mw_connector_state *mw_state; + + if (WARN_ON(!connector->state)) + return NULL; + + mw_state = kzalloc(sizeof(*mw_state), GFP_KERNEL); + if (!mw_state) + return NULL; + + /* No need to preserve any of our driver-local data */ + __drm_atomic_helper_connector_duplicate_state(connector, &mw_state->base); + + return &mw_state->base; +} + +static void malidp_mw_connector_destroy_state(struct drm_connector *connector, + struct drm_connector_state *state) +{ + struct malidp_mw_connector_state *mw_state = to_mw_state(state); + + __drm_atomic_helper_connector_destroy_state(&mw_state->base); + if (mw_state->job) + malidp_mw_job_cleanup(connector->dev, mw_state->job); + kfree(mw_state); +} + +static const struct drm_connector_funcs malidp_mw_connector_funcs = { + .dpms = drm_atomic_helper_connector_dpms, + .reset = drm_atomic_helper_connector_reset, + .detect = malidp_mw_connector_detect, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = malidp_mw_connector_destroy, + .atomic_duplicate_state = malidp_mw_connector_duplicate_state, + .atomic_destroy_state = malidp_mw_connector_destroy_state, +}; + +static int +malidp_mw_encoder_atomic_check(struct drm_encoder *encoder, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + struct drm_connector *conn = conn_state->connector; + struct drm_framebuffer *fb = conn_state->fb; + struct malidp_drm *malidp = mw_conn_to_malidp_device(conn); + struct malidp_mw_connector_state *mw_state; + int i, n_planes; + + mw_state = (struct malidp_mw_connector_state *)conn_state; + + if (!conn_state->fb) + return 0; + + if ((fb->width != crtc_state->mode.hdisplay) || + (fb->height != crtc_state->mode.vdisplay)) { + DRM_DEBUG_KMS("Invalid framebuffer size %ux%u\n", + fb->width, fb->height); + return -EINVAL; + } + + mw_state->format = + malidp_hw_get_format_id(&malidp->dev->map, SE_MEMWRITE, + fb->pixel_format); + if (mw_state->format == MALIDP_INVALID_FORMAT_ID) { + char *format_name = drm_get_format_name(fb->pixel_format); + DRM_DEBUG_KMS("Invalid pixel format %s\n", format_name); + kfree(format_name); + return -EINVAL; + } + + n_planes = drm_format_num_planes(fb->pixel_format); + for (i = 0; i < n_planes; i++) { + struct drm_gem_cma_object *obj = drm_fb_cma_get_gem_obj(fb, i); + if (!malidp_hw_pitch_valid(malidp->dev, fb->pitches[i])) { + DRM_DEBUG_KMS("Invalid pitch %u for plane %d\n", + fb->pitches[i], i); + return -EINVAL; + } + mw_state->pitches[i] = fb->pitches[i]; + mw_state->addrs[i] = obj->paddr + fb->offsets[i]; + } + mw_state->n_planes = n_planes; + + mw_state->job = kmalloc(sizeof(*mw_state->job), GFP_KERNEL); + if (!mw_state->job) + return -ENOMEM; + + DRM_DEV_DEBUG_DRIVER(conn->dev->dev, "MW job create %p\n", + mw_state->job); + /* We can take ownership of the framebuffer reference in the job. */ + mw_state->job->fb = conn_state->fb; + conn_state->fb = NULL; + + return 0; +} + +static const struct drm_encoder_helper_funcs malidp_mw_encoder_helper_funcs = { + .atomic_check = malidp_mw_encoder_atomic_check, +}; + +static void malidp_mw_encoder_destroy(struct drm_encoder *encoder) +{ + drm_encoder_cleanup(encoder); +} + +static const struct drm_encoder_funcs malidp_mw_encoder_funcs = { + .destroy = malidp_mw_encoder_destroy, +}; + +static u32 *get_writeback_formats(struct malidp_drm *malidp, int *n_formats) +{ + const struct malidp_hw_regmap *map = &malidp->dev->map; + u32 *formats; + int n, i; + + formats = kcalloc(map->n_pixel_formats, sizeof(*formats), + GFP_KERNEL); + if (!formats) + return NULL; + + for (n = 0, i = 0; i < map->n_pixel_formats; i++) { + if (map->pixel_formats[i].layer & SE_MEMWRITE) + formats[n++] = map->pixel_formats[i].format; + } + + *n_formats = n; + return formats; +} + +int malidp_mw_connector_init(struct drm_device *drm) +{ + struct malidp_drm *malidp = drm->dev_private; + u32 *formats; + int ret, n_formats; + + if (!malidp->dev->enable_memwrite) + return 0; + + drm_encoder_helper_add(&malidp->mw_encoder, &malidp_mw_encoder_helper_funcs); + malidp->mw_encoder.possible_crtcs = 1 << drm_crtc_index(&malidp->crtc); + ret = drm_encoder_init(drm, &malidp->mw_encoder, &malidp_mw_encoder_funcs, + DRM_MODE_ENCODER_VIRTUAL, NULL); + if (ret) + return ret; + + drm_connector_helper_add(&malidp->mw_connector, + &malidp_mw_connector_helper_funcs); + malidp->mw_connector.interlace_allowed = 0; + + formats = get_writeback_formats(malidp, &n_formats); + if (!formats) { + ret = -ENOMEM; + goto err_encoder; + } + + ret = drm_writeback_connector_init(drm, &malidp->mw_connector, + &malidp_mw_connector_funcs, + formats, n_formats); + kfree(formats); + if (ret) + goto err_encoder; + + ret = drm_mode_connector_attach_encoder(&malidp->mw_connector, + &malidp->mw_encoder); + if (ret) + goto err_connector; + + return 0; + +err_connector: + drm_connector_cleanup(&malidp->mw_connector); +err_encoder: + drm_encoder_cleanup(&malidp->mw_encoder); + return ret; +} + +void malidp_mw_atomic_commit(struct drm_device *drm, + struct drm_atomic_state *old_state) +{ + struct malidp_mw_connector_state *mw_state; + struct malidp_drm *malidp = drm->dev_private; + struct malidp_hw_device *hwdev = malidp->dev; + struct drm_connector *mw_conn = &malidp->mw_connector; + + mw_state = to_mw_state(mw_conn->state); + + if (!mw_state) + return; + + if (mw_state->job) { + struct drm_framebuffer *fb = mw_state->job->fb; + DRM_DEV_DEBUG_DRIVER(drm->dev, "Enable memwrite %ux%u:%d %pad fmt: %u\n", + fb->width, fb->height, mw_state->pitches[0], + &mw_state->addrs[0], mw_state->format); + + /* Queue up the job for completion handling */ + DRM_DEV_DEBUG_DRIVER(drm->dev, "MW job queue %p\n", mw_state->job); + + WARN_ON(malidp->current_mw); + malidp->current_mw = mw_state->job; + mw_state->job = NULL; + + hwdev->enable_memwrite(hwdev, mw_state->addrs, mw_state->pitches, + mw_state->n_planes, fb->width, fb->height, + mw_state->format); + } else { + DRM_DEV_DEBUG_DRIVER(drm->dev, "Disable memwrite\n"); + hwdev->disable_memwrite(hwdev); + } +} diff --git a/drivers/gpu/drm/arm/malidp_mw.h b/drivers/gpu/drm/arm/malidp_mw.h new file mode 100644 index 0000000..db7b2b0 --- /dev/null +++ b/drivers/gpu/drm/arm/malidp_mw.h @@ -0,0 +1,25 @@ +/* + * (C) COPYRIGHT 2016 ARM Limited. All rights reserved. + * Author: Brian Starkey + * + * This program is free software and is provided to you under the terms of the + * GNU General Public License version 2 as published by the Free Software + * Foundation, and any use by you of this program is subject to the terms + * of such GNU licence. + * + */ + +#ifndef __MALIDP_MW_H__ +#define __MALIDP_MW_H__ + +struct malidp_mw_job { + struct list_head list; + struct drm_framebuffer *fb; +}; + +int malidp_mw_connector_init(struct drm_device *drm); +void malidp_mw_atomic_commit(struct drm_device *drm, + struct drm_atomic_state *old_state); +void malidp_mw_job_cleanup(struct drm_device *drm, + struct malidp_mw_job *job); +#endif -- 1.7.9.5 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brian Starkey Subject: [RFC PATCH v2 6/9] drm: mali-dp: Add writeback connector Date: Wed, 26 Oct 2016 09:55:05 +0100 Message-ID: <1477472108-27222-7-git-send-email-brian.starkey@arm.com> References: <1477472108-27222-1-git-send-email-brian.starkey@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from foss.arm.com (foss.arm.com [217.140.101.70]) by gabe.freedesktop.org (Postfix) with ESMTP id 9A8C66E819 for ; Wed, 26 Oct 2016 08:55:35 +0000 (UTC) In-Reply-To: <1477472108-27222-1-git-send-email-brian.starkey@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org List-Id: dri-devel@lists.freedesktop.org TWFsaS1EUCBoYXMgYSBtZW1vcnkgd3JpdGViYWNrIGVuZ2luZSB3aGljaCBjYW4gYmUgdXNlZCB0 byB3cml0ZSB0aGUKY29tcG9zaXRpb24gcmVzdWx0IHRvIGEgbWVtb3J5IGJ1ZmZlci4KRXhwb3Nl IHRoaXMgZnVuY3Rpb25hbGl0eSBhcyBhIERSTSB3cml0ZWJhY2sgY29ubmVjdG9yIG9uIHN1cHBv cnRlZApoYXJkd2FyZS4KClNpZ25lZC1vZmYtYnk6IEJyaWFuIFN0YXJrZXkgPGJyaWFuLnN0YXJr 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