390 lines
12 KiB
C
390 lines
12 KiB
C
/*
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* Copyright (C) 2015 Red Hat, Inc.
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* All Rights Reserved.
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*
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* Authors:
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* Dave Airlie
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* Alon Levy
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "virtgpu_drv.h"
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_gem_framebuffer_helper.h>
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#define XRES_MIN 32
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#define YRES_MIN 32
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#define XRES_DEF 1024
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#define YRES_DEF 768
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#define XRES_MAX 8192
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#define YRES_MAX 8192
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static const struct drm_crtc_funcs virtio_gpu_crtc_funcs = {
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.set_config = drm_atomic_helper_set_config,
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.destroy = drm_crtc_cleanup,
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.page_flip = drm_atomic_helper_page_flip,
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.reset = drm_atomic_helper_crtc_reset,
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.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
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};
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static int
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virtio_gpu_framebuffer_surface_dirty(struct drm_framebuffer *fb,
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struct drm_file *file_priv,
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unsigned int flags, unsigned int color,
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struct drm_clip_rect *clips,
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unsigned int num_clips)
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{
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struct virtio_gpu_framebuffer *virtio_gpu_fb
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= to_virtio_gpu_framebuffer(fb);
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return virtio_gpu_surface_dirty(virtio_gpu_fb, clips, num_clips);
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}
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static const struct drm_framebuffer_funcs virtio_gpu_fb_funcs = {
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.create_handle = drm_gem_fb_create_handle,
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.destroy = drm_gem_fb_destroy,
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.dirty = virtio_gpu_framebuffer_surface_dirty,
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};
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int
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virtio_gpu_framebuffer_init(struct drm_device *dev,
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struct virtio_gpu_framebuffer *vgfb,
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const struct drm_mode_fb_cmd2 *mode_cmd,
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struct drm_gem_object *obj)
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{
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int ret;
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vgfb->base.obj[0] = obj;
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drm_helper_mode_fill_fb_struct(dev, &vgfb->base, mode_cmd);
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ret = drm_framebuffer_init(dev, &vgfb->base, &virtio_gpu_fb_funcs);
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if (ret) {
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vgfb->base.obj[0] = NULL;
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return ret;
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}
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spin_lock_init(&vgfb->dirty_lock);
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vgfb->x1 = vgfb->y1 = INT_MAX;
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vgfb->x2 = vgfb->y2 = 0;
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return 0;
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}
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static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc)
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{
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struct drm_device *dev = crtc->dev;
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struct virtio_gpu_device *vgdev = dev->dev_private;
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struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
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virtio_gpu_cmd_set_scanout(vgdev, output->index, 0,
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crtc->mode.hdisplay,
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crtc->mode.vdisplay, 0, 0);
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}
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static void virtio_gpu_crtc_atomic_enable(struct drm_crtc *crtc,
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struct drm_crtc_state *old_state)
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{
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struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
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output->enabled = true;
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}
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static void virtio_gpu_crtc_atomic_disable(struct drm_crtc *crtc,
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struct drm_crtc_state *old_state)
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{
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struct drm_device *dev = crtc->dev;
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struct virtio_gpu_device *vgdev = dev->dev_private;
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struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
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virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0);
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output->enabled = false;
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}
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static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc,
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struct drm_crtc_state *state)
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{
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return 0;
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}
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static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc,
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struct drm_crtc_state *old_state)
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{
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unsigned long flags;
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spin_lock_irqsave(&crtc->dev->event_lock, flags);
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if (crtc->state->event)
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drm_crtc_send_vblank_event(crtc, crtc->state->event);
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crtc->state->event = NULL;
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spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
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}
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static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = {
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.mode_set_nofb = virtio_gpu_crtc_mode_set_nofb,
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.atomic_check = virtio_gpu_crtc_atomic_check,
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.atomic_flush = virtio_gpu_crtc_atomic_flush,
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.atomic_enable = virtio_gpu_crtc_atomic_enable,
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.atomic_disable = virtio_gpu_crtc_atomic_disable,
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};
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static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder,
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struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode)
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{
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}
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static void virtio_gpu_enc_enable(struct drm_encoder *encoder)
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{
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}
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static void virtio_gpu_enc_disable(struct drm_encoder *encoder)
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{
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}
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static int virtio_gpu_conn_get_modes(struct drm_connector *connector)
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{
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struct virtio_gpu_output *output =
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drm_connector_to_virtio_gpu_output(connector);
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struct drm_display_mode *mode = NULL;
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int count, width, height;
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if (output->edid) {
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count = drm_add_edid_modes(connector, output->edid);
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if (count)
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return count;
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}
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width = le32_to_cpu(output->info.r.width);
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height = le32_to_cpu(output->info.r.height);
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count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
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if (width == 0 || height == 0) {
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width = XRES_DEF;
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height = YRES_DEF;
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drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
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} else {
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DRM_DEBUG("add mode: %dx%d\n", width, height);
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mode = drm_cvt_mode(connector->dev, width, height, 60,
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false, false, false);
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mode->type |= DRM_MODE_TYPE_PREFERRED;
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drm_mode_probed_add(connector, mode);
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count++;
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}
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return count;
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}
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static enum drm_mode_status virtio_gpu_conn_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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struct virtio_gpu_output *output =
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drm_connector_to_virtio_gpu_output(connector);
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int width, height;
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width = le32_to_cpu(output->info.r.width);
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height = le32_to_cpu(output->info.r.height);
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if (!(mode->type & DRM_MODE_TYPE_PREFERRED))
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return MODE_OK;
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if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF)
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return MODE_OK;
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if (mode->hdisplay <= width && mode->hdisplay >= width - 16 &&
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mode->vdisplay <= height && mode->vdisplay >= height - 16)
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return MODE_OK;
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DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay);
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return MODE_BAD;
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}
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static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = {
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.mode_set = virtio_gpu_enc_mode_set,
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.enable = virtio_gpu_enc_enable,
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.disable = virtio_gpu_enc_disable,
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};
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static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = {
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.get_modes = virtio_gpu_conn_get_modes,
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.mode_valid = virtio_gpu_conn_mode_valid,
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};
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static enum drm_connector_status virtio_gpu_conn_detect(
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struct drm_connector *connector,
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bool force)
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{
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struct virtio_gpu_output *output =
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drm_connector_to_virtio_gpu_output(connector);
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if (output->info.enabled)
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return connector_status_connected;
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else
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return connector_status_disconnected;
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}
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static void virtio_gpu_conn_destroy(struct drm_connector *connector)
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{
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drm_connector_unregister(connector);
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drm_connector_cleanup(connector);
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}
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static const struct drm_connector_funcs virtio_gpu_connector_funcs = {
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.detect = virtio_gpu_conn_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = virtio_gpu_conn_destroy,
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.reset = drm_atomic_helper_connector_reset,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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static const struct drm_encoder_funcs virtio_gpu_enc_funcs = {
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.destroy = drm_encoder_cleanup,
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};
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static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index)
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{
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struct drm_device *dev = vgdev->ddev;
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struct virtio_gpu_output *output = vgdev->outputs + index;
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struct drm_connector *connector = &output->conn;
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struct drm_encoder *encoder = &output->enc;
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struct drm_crtc *crtc = &output->crtc;
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struct drm_plane *primary, *cursor;
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output->index = index;
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if (index == 0) {
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output->info.enabled = cpu_to_le32(true);
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output->info.r.width = cpu_to_le32(XRES_DEF);
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output->info.r.height = cpu_to_le32(YRES_DEF);
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}
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primary = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_PRIMARY, index);
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if (IS_ERR(primary))
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return PTR_ERR(primary);
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cursor = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_CURSOR, index);
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if (IS_ERR(cursor))
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return PTR_ERR(cursor);
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drm_crtc_init_with_planes(dev, crtc, primary, cursor,
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&virtio_gpu_crtc_funcs, NULL);
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drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs);
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drm_connector_init(dev, connector, &virtio_gpu_connector_funcs,
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DRM_MODE_CONNECTOR_VIRTUAL);
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drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs);
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if (vgdev->has_edid)
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drm_connector_attach_edid_property(connector);
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drm_encoder_init(dev, encoder, &virtio_gpu_enc_funcs,
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DRM_MODE_ENCODER_VIRTUAL, NULL);
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drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs);
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encoder->possible_crtcs = 1 << index;
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drm_connector_attach_encoder(connector, encoder);
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drm_connector_register(connector);
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return 0;
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}
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static struct drm_framebuffer *
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virtio_gpu_user_framebuffer_create(struct drm_device *dev,
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struct drm_file *file_priv,
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const struct drm_mode_fb_cmd2 *mode_cmd)
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{
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struct drm_gem_object *obj = NULL;
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struct virtio_gpu_framebuffer *virtio_gpu_fb;
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int ret;
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if (mode_cmd->pixel_format != DRM_FORMAT_HOST_XRGB8888 &&
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mode_cmd->pixel_format != DRM_FORMAT_HOST_ARGB8888)
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return ERR_PTR(-ENOENT);
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/* lookup object associated with res handle */
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obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]);
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if (!obj)
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return ERR_PTR(-EINVAL);
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virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL);
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if (virtio_gpu_fb == NULL)
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return ERR_PTR(-ENOMEM);
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ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj);
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if (ret) {
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kfree(virtio_gpu_fb);
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drm_gem_object_put_unlocked(obj);
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return NULL;
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}
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return &virtio_gpu_fb->base;
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}
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static void vgdev_atomic_commit_tail(struct drm_atomic_state *state)
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{
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struct drm_device *dev = state->dev;
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drm_atomic_helper_commit_modeset_disables(dev, state);
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drm_atomic_helper_commit_modeset_enables(dev, state);
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drm_atomic_helper_commit_planes(dev, state, 0);
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drm_atomic_helper_commit_hw_done(state);
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drm_atomic_helper_wait_for_vblanks(dev, state);
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drm_atomic_helper_cleanup_planes(dev, state);
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}
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static const struct drm_mode_config_helper_funcs virtio_mode_config_helpers = {
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.atomic_commit_tail = vgdev_atomic_commit_tail,
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};
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static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = {
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.fb_create = virtio_gpu_user_framebuffer_create,
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.atomic_check = drm_atomic_helper_check,
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.atomic_commit = drm_atomic_helper_commit,
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};
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void virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev)
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{
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int i;
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drm_mode_config_init(vgdev->ddev);
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vgdev->ddev->mode_config.quirk_addfb_prefer_host_byte_order = true;
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vgdev->ddev->mode_config.funcs = &virtio_gpu_mode_funcs;
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vgdev->ddev->mode_config.helper_private = &virtio_mode_config_helpers;
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/* modes will be validated against the framebuffer size */
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vgdev->ddev->mode_config.min_width = XRES_MIN;
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vgdev->ddev->mode_config.min_height = YRES_MIN;
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vgdev->ddev->mode_config.max_width = XRES_MAX;
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vgdev->ddev->mode_config.max_height = YRES_MAX;
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for (i = 0 ; i < vgdev->num_scanouts; ++i)
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vgdev_output_init(vgdev, i);
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drm_mode_config_reset(vgdev->ddev);
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}
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void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev)
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{
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int i;
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for (i = 0 ; i < vgdev->num_scanouts; ++i)
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kfree(vgdev->outputs[i].edid);
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drm_mode_config_cleanup(vgdev->ddev);
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}
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