Пример #1
0
/* called from IRQ to update cursor related registers (if needed).  The
 * cursor registers, other than x/y position, appear not to be double
 * buffered, and changing them other than from vblank seems to trigger
 * underflow.
 */
static void update_cursor(struct drm_crtc *crtc)
{
	struct mdp4_crtc *mdp4_crtc = to_mdp4_crtc(crtc);
	struct mdp4_kms *mdp4_kms = get_kms(crtc);
	enum mdp4_dma dma = mdp4_crtc->dma;
	unsigned long flags;

	spin_lock_irqsave(&mdp4_crtc->cursor.lock, flags);
	if (mdp4_crtc->cursor.stale) {
		struct drm_gem_object *next_bo = mdp4_crtc->cursor.next_bo;
		struct drm_gem_object *prev_bo = mdp4_crtc->cursor.scanout_bo;
		uint32_t iova = mdp4_crtc->cursor.next_iova;

		if (next_bo) {
			/* take a obj ref + iova ref when we start scanning out: */
			drm_gem_object_reference(next_bo);
			msm_gem_get_iova_locked(next_bo, mdp4_kms->id, &iova);

			/* enable cursor: */
			mdp4_write(mdp4_kms, REG_MDP4_DMA_CURSOR_SIZE(dma),
					MDP4_DMA_CURSOR_SIZE_WIDTH(mdp4_crtc->cursor.width) |
					MDP4_DMA_CURSOR_SIZE_HEIGHT(mdp4_crtc->cursor.height));
			mdp4_write(mdp4_kms, REG_MDP4_DMA_CURSOR_BASE(dma), iova);
			mdp4_write(mdp4_kms, REG_MDP4_DMA_CURSOR_BLEND_CONFIG(dma),
					MDP4_DMA_CURSOR_BLEND_CONFIG_FORMAT(CURSOR_ARGB) |
					MDP4_DMA_CURSOR_BLEND_CONFIG_CURSOR_EN);
		} else {
			/* disable cursor: */
			mdp4_write(mdp4_kms, REG_MDP4_DMA_CURSOR_BASE(dma),
					mdp4_kms->blank_cursor_iova);
		}

		/* and drop the iova ref + obj rev when done scanning out: */
		if (prev_bo)
			drm_flip_work_queue(&mdp4_crtc->unref_cursor_work, prev_bo);

		mdp4_crtc->cursor.scanout_bo = next_bo;
		mdp4_crtc->cursor.stale = false;
	}

	mdp4_write(mdp4_kms, REG_MDP4_DMA_CURSOR_POS(dma),
			MDP4_DMA_CURSOR_POS_X(mdp4_crtc->cursor.x) |
			MDP4_DMA_CURSOR_POS_Y(mdp4_crtc->cursor.y));

	spin_unlock_irqrestore(&mdp4_crtc->cursor.lock, flags);
}
Пример #2
0
/* get iova, taking a reference.  Should have a matching put */
int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint32_t *iova)
{
	struct msm_gem_object *msm_obj = to_msm_bo(obj);
	int ret;

	/* this is safe right now because we don't unmap until the
	 * bo is deleted:
	 */
	if (msm_obj->domain[id].iova) {
		*iova = msm_obj->domain[id].iova;
		return 0;
	}

	mutex_lock(&obj->dev->struct_mutex);
	ret = msm_gem_get_iova_locked(obj, id, iova);
	mutex_unlock(&obj->dev->struct_mutex);
	return ret;
}
/* add bo's to gpu's ring, and kick gpu: */
int msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
		struct msm_file_private *ctx)
{
	struct drm_device *dev = gpu->dev;
	struct msm_drm_private *priv = dev->dev_private;
	int i, ret;

	mutex_lock(&dev->struct_mutex);

	submit->fence = ++priv->next_fence;

	gpu->submitted_fence = submit->fence;

	ret = gpu->funcs->submit(gpu, submit, ctx);
	priv->lastctx = ctx;

	for (i = 0; i < submit->nr_bos; i++) {
		struct msm_gem_object *msm_obj = submit->bos[i].obj;

		/* can't happen yet.. but when we add 2d support we'll have
		 * to deal w/ cross-ring synchronization:
		 */
		WARN_ON(is_active(msm_obj) && (msm_obj->gpu != gpu));

		if (!is_active(msm_obj)) {
			uint32_t iova;

			/* ring takes a reference to the bo and iova: */
			drm_gem_object_reference(&msm_obj->base);
			msm_gem_get_iova_locked(&msm_obj->base,
					submit->gpu->id, &iova);
		}

		if (submit->bos[i].flags & MSM_SUBMIT_BO_READ)
			msm_gem_move_to_active(&msm_obj->base, gpu, false, submit->fence);

		if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE)
			msm_gem_move_to_active(&msm_obj->base, gpu, true, submit->fence);
	}
	hangcheck_timer_reset(gpu);
	mutex_unlock(&dev->struct_mutex);

	return ret;
}
int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
		struct msm_gpu *gpu, const struct msm_gpu_funcs *funcs,
		const char *name, const char *ioname, const char *irqname, int ringsz)
{
	int i, ret;

	gpu->dev = drm;
	gpu->funcs = funcs;
	gpu->name = name;

	INIT_LIST_HEAD(&gpu->active_list);
	INIT_WORK(&gpu->retire_work, retire_worker);
	INIT_WORK(&gpu->recover_work, recover_worker);

	setup_timer(&gpu->hangcheck_timer, hangcheck_handler,
			(unsigned long)gpu);

	BUG_ON(ARRAY_SIZE(clk_names) != ARRAY_SIZE(gpu->grp_clks));

	/* Map registers: */
	gpu->mmio = msm_ioremap(pdev, ioname, name);
	if (IS_ERR(gpu->mmio)) {
		ret = PTR_ERR(gpu->mmio);
		goto fail;
	}

	/* Get Interrupt: */
	gpu->irq = platform_get_irq_byname(pdev, irqname);
	if (gpu->irq < 0) {
		ret = gpu->irq;
		dev_err(drm->dev, "failed to get irq: %d\n", ret);
		goto fail;
	}

	ret = devm_request_irq(&pdev->dev, gpu->irq, irq_handler,
			IRQF_TRIGGER_HIGH, gpu->name, gpu);
	if (ret) {
		dev_err(drm->dev, "failed to request IRQ%u: %d\n", gpu->irq, ret);
		goto fail;
	}

	/* Acquire clocks: */
	for (i = 0; i < ARRAY_SIZE(clk_names); i++) {
		gpu->grp_clks[i] = devm_clk_get(&pdev->dev, clk_names[i]);
		DBG("grp_clks[%s]: %p", clk_names[i], gpu->grp_clks[i]);
		if (IS_ERR(gpu->grp_clks[i]))
			gpu->grp_clks[i] = NULL;
	}

	gpu->ebi1_clk = devm_clk_get(&pdev->dev, "bus_clk");
	DBG("ebi1_clk: %p", gpu->ebi1_clk);
	if (IS_ERR(gpu->ebi1_clk))
		gpu->ebi1_clk = NULL;

	/* Acquire regulators: */
	gpu->gpu_reg = devm_regulator_get(&pdev->dev, "vdd");
	DBG("gpu_reg: %p", gpu->gpu_reg);
	if (IS_ERR(gpu->gpu_reg))
		gpu->gpu_reg = NULL;

	gpu->gpu_cx = devm_regulator_get(&pdev->dev, "vddcx");
	DBG("gpu_cx: %p", gpu->gpu_cx);
	if (IS_ERR(gpu->gpu_cx))
		gpu->gpu_cx = NULL;

	/* Setup IOMMU.. eventually we will (I think) do this once per context
	 * and have separate page tables per context.  For now, to keep things
	 * simple and to get something working, just use a single address space:
	 */
	gpu->iommu = iommu_domain_alloc(&platform_bus_type);
	if (!gpu->iommu) {
		dev_err(drm->dev, "failed to allocate IOMMU\n");
		ret = -ENOMEM;
		goto fail;
	}
	gpu->id = msm_register_iommu(drm, gpu->iommu);

	/* Create ringbuffer: */
	gpu->rb = msm_ringbuffer_new(gpu, ringsz);
	if (IS_ERR(gpu->rb)) {
		ret = PTR_ERR(gpu->rb);
		gpu->rb = NULL;
		dev_err(drm->dev, "could not create ringbuffer: %d\n", ret);
		goto fail;
	}

	ret = msm_gem_get_iova_locked(gpu->rb->bo, gpu->id, &gpu->rb_iova);
	if (ret) {
		gpu->rb_iova = 0;
		dev_err(drm->dev, "could not map ringbuffer: %d\n", ret);
		goto fail;
	}

	bs_init(gpu, pdev);

	return 0;

fail:
	return ret;
}