Initial import

1 files changed, 376 insertions, 0 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
new file mode 100644
index 000000000..9006b947e
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -0,0 +1,376 @@
+/* exynos_drm_crtc.c
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * Authors:
+ *	Inki Dae <inki.dae@samsung.com>
+ *	Joonyoung Shim <jy0922.shim@samsung.com>
+ *	Seung-Woo Kim <sw0312.kim@samsung.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+
+#include "exynos_drm_crtc.h"
+#include "exynos_drm_drv.h"
+#include "exynos_drm_encoder.h"
+#include "exynos_drm_plane.h"
+
+static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
+{
+	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+
+	DRM_DEBUG_KMS("crtc[%d] mode[%d]\n", crtc->base.id, mode);
+
+	if (exynos_crtc->dpms == mode) {
+		DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n");
+		return;
+	}
+
+	if (mode > DRM_MODE_DPMS_ON) {
+		/* wait for the completion of page flip. */
+		if (!wait_event_timeout(exynos_crtc->pending_flip_queue,
+				(exynos_crtc->event == NULL), HZ/20))
+			exynos_crtc->event = NULL;
+		drm_crtc_vblank_off(crtc);
+	}
+
+	if (exynos_crtc->ops->dpms)
+		exynos_crtc->ops->dpms(exynos_crtc, mode);
+
+	exynos_crtc->dpms = mode;
+
+	if (mode == DRM_MODE_DPMS_ON)
+		drm_crtc_vblank_on(crtc);
+}
+
+static void exynos_drm_crtc_prepare(struct drm_crtc *crtc)
+{
+	/* drm framework doesn't check NULL. */
+}
+
+static void exynos_drm_crtc_commit(struct drm_crtc *crtc)
+{
+	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+	struct exynos_drm_plane *exynos_plane = to_exynos_plane(crtc->primary);
+
+	exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
+
+	if (exynos_crtc->ops->win_commit)
+		exynos_crtc->ops->win_commit(exynos_crtc, exynos_plane->zpos);
+
+	if (exynos_crtc->ops->commit)
+		exynos_crtc->ops->commit(exynos_crtc);
+}
+
+static bool
+exynos_drm_crtc_mode_fixup(struct drm_crtc *crtc,
+			    const struct drm_display_mode *mode,
+			    struct drm_display_mode *adjusted_mode)
+{
+	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+
+	if (exynos_crtc->ops->mode_fixup)
+		return exynos_crtc->ops->mode_fixup(exynos_crtc, mode,
+						    adjusted_mode);
+
+	return true;
+}
+
+static int
+exynos_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
+			  struct drm_display_mode *adjusted_mode, int x, int y,
+			  struct drm_framebuffer *old_fb)
+{
+	struct drm_framebuffer *fb = crtc->primary->fb;
+	unsigned int crtc_w;
+	unsigned int crtc_h;
+	int ret;
+
+	/*
+	 * copy the mode data adjusted by mode_fixup() into crtc->mode
+	 * so that hardware can be seet to proper mode.
+	 */
+	memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode));
+
+	ret = exynos_check_plane(crtc->primary, fb);
+	if (ret < 0)
+		return ret;
+
+	crtc_w = fb->width - x;
+	crtc_h = fb->height - y;
+	exynos_plane_mode_set(crtc->primary, crtc, fb, 0, 0,
+			      crtc_w, crtc_h, x, y, crtc_w, crtc_h);
+
+	return 0;
+}
+
+static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
+					  struct drm_framebuffer *old_fb)
+{
+	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+	struct drm_framebuffer *fb = crtc->primary->fb;
+	unsigned int crtc_w;
+	unsigned int crtc_h;
+
+	/* when framebuffer changing is requested, crtc's dpms should be on */
+	if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
+		DRM_ERROR("failed framebuffer changing request.\n");
+		return -EPERM;
+	}
+
+	crtc_w = fb->width - x;
+	crtc_h = fb->height - y;
+
+	return exynos_update_plane(crtc->primary, crtc, fb, 0, 0,
+				   crtc_w, crtc_h, x, y, crtc_w, crtc_h);
+}
+
+static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
+{
+	struct drm_plane *plane;
+	int ret;
+
+	exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
+
+	drm_for_each_legacy_plane(plane, &crtc->dev->mode_config.plane_list) {
+		if (plane->crtc != crtc)
+			continue;
+
+		ret = plane->funcs->disable_plane(plane);
+		if (ret)
+			DRM_ERROR("Failed to disable plane %d\n", ret);
+	}
+}
+
+static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
+	.dpms		= exynos_drm_crtc_dpms,
+	.prepare	= exynos_drm_crtc_prepare,
+	.commit		= exynos_drm_crtc_commit,
+	.mode_fixup	= exynos_drm_crtc_mode_fixup,
+	.mode_set	= exynos_drm_crtc_mode_set,
+	.mode_set_base	= exynos_drm_crtc_mode_set_base,
+	.disable	= exynos_drm_crtc_disable,
+};
+
+static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
+				     struct drm_framebuffer *fb,
+				     struct drm_pending_vblank_event *event,
+				     uint32_t page_flip_flags)
+{
+	struct drm_device *dev = crtc->dev;
+	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+	struct drm_framebuffer *old_fb = crtc->primary->fb;
+	unsigned int crtc_w, crtc_h;
+	int ret;
+
+	/* when the page flip is requested, crtc's dpms should be on */
+	if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
+		DRM_ERROR("failed page flip request.\n");
+		return -EINVAL;
+	}
+
+	if (!event)
+		return -EINVAL;
+
+	spin_lock_irq(&dev->event_lock);
+	if (exynos_crtc->event) {
+		ret = -EBUSY;
+		goto out;
+	}
+
+	ret = drm_vblank_get(dev, exynos_crtc->pipe);
+	if (ret) {
+		DRM_DEBUG("failed to acquire vblank counter\n");
+		goto out;
+	}
+
+	exynos_crtc->event = event;
+	spin_unlock_irq(&dev->event_lock);
+
+	/*
+	 * the pipe from user always is 0 so we can set pipe number
+	 * of current owner to event.
+	 */
+	event->pipe = exynos_crtc->pipe;
+
+	crtc->primary->fb = fb;
+	crtc_w = fb->width - crtc->x;
+	crtc_h = fb->height - crtc->y;
+	ret = exynos_update_plane(crtc->primary, crtc, fb, 0, 0,
+				  crtc_w, crtc_h, crtc->x, crtc->y,
+				  crtc_w, crtc_h);
+	if (ret) {
+		crtc->primary->fb = old_fb;
+		spin_lock_irq(&dev->event_lock);
+		exynos_crtc->event = NULL;
+		drm_vblank_put(dev, exynos_crtc->pipe);
+		spin_unlock_irq(&dev->event_lock);
+		return ret;
+	}
+
+	return 0;
+
+out:
+	spin_unlock_irq(&dev->event_lock);
+	return ret;
+}
+
+static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
+{
+	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+	struct exynos_drm_private *private = crtc->dev->dev_private;
+
+	private->crtc[exynos_crtc->pipe] = NULL;
+
+	drm_crtc_cleanup(crtc);
+	kfree(exynos_crtc);
+}
+
+static struct drm_crtc_funcs exynos_crtc_funcs = {
+	.set_config	= drm_crtc_helper_set_config,
+	.page_flip	= exynos_drm_crtc_page_flip,
+	.destroy	= exynos_drm_crtc_destroy,
+};
+
+struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
+					struct drm_plane *plane,
+					int pipe,
+					enum exynos_drm_output_type type,
+					const struct exynos_drm_crtc_ops *ops,
+					void *ctx)
+{
+	struct exynos_drm_crtc *exynos_crtc;
+	struct exynos_drm_private *private = drm_dev->dev_private;
+	struct drm_crtc *crtc;
+	int ret;
+
+	exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
+	if (!exynos_crtc)
+		return ERR_PTR(-ENOMEM);
+
+	init_waitqueue_head(&exynos_crtc->pending_flip_queue);
+
+	exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
+	exynos_crtc->pipe = pipe;
+	exynos_crtc->type = type;
+	exynos_crtc->ops = ops;
+	exynos_crtc->ctx = ctx;
+
+	crtc = &exynos_crtc->base;
+
+	private->crtc[pipe] = crtc;
+
+	ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
+					&exynos_crtc_funcs);
+	if (ret < 0)
+		goto err_crtc;
+
+	drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
+
+	return exynos_crtc;
+
+err_crtc:
+	plane->funcs->destroy(plane);
+	kfree(exynos_crtc);
+	return ERR_PTR(ret);
+}
+
+int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int pipe)
+{
+	struct exynos_drm_private *private = dev->dev_private;
+	struct exynos_drm_crtc *exynos_crtc =
+		to_exynos_crtc(private->crtc[pipe]);
+
+	if (exynos_crtc->dpms != DRM_MODE_DPMS_ON)
+		return -EPERM;
+
+	if (exynos_crtc->ops->enable_vblank)
+		exynos_crtc->ops->enable_vblank(exynos_crtc);
+
+	return 0;
+}
+
+void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int pipe)
+{
+	struct exynos_drm_private *private = dev->dev_private;
+	struct exynos_drm_crtc *exynos_crtc =
+		to_exynos_crtc(private->crtc[pipe]);
+
+	if (exynos_crtc->dpms != DRM_MODE_DPMS_ON)
+		return;
+
+	if (exynos_crtc->ops->disable_vblank)
+		exynos_crtc->ops->disable_vblank(exynos_crtc);
+}
+
+void exynos_drm_crtc_finish_pageflip(struct drm_device *dev, int pipe)
+{
+	struct exynos_drm_private *dev_priv = dev->dev_private;
+	struct drm_crtc *drm_crtc = dev_priv->crtc[pipe];
+	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(drm_crtc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->event_lock, flags);
+	if (exynos_crtc->event) {
+
+		drm_send_vblank_event(dev, -1, exynos_crtc->event);
+		drm_vblank_put(dev, pipe);
+		wake_up(&exynos_crtc->pending_flip_queue);
+
+	}
+
+	exynos_crtc->event = NULL;
+	spin_unlock_irqrestore(&dev->event_lock, flags);
+}
+
+void exynos_drm_crtc_complete_scanout(struct drm_framebuffer *fb)
+{
+	struct exynos_drm_crtc *exynos_crtc;
+	struct drm_device *dev = fb->dev;
+	struct drm_crtc *crtc;
+
+	/*
+	 * make sure that overlay data are updated to real hardware
+	 * for all encoders.
+	 */
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		exynos_crtc = to_exynos_crtc(crtc);
+
+		/*
+		 * wait for vblank interrupt
+		 * - this makes sure that overlay data are updated to
+		 *	real hardware.
+		 */
+		if (exynos_crtc->ops->wait_for_vblank)
+			exynos_crtc->ops->wait_for_vblank(exynos_crtc);
+	}
+}
+
+int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev,
+					unsigned int out_type)
+{
+	struct drm_crtc *crtc;
+
+	list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) {
+		struct exynos_drm_crtc *exynos_crtc;
+
+		exynos_crtc = to_exynos_crtc(crtc);
+		if (exynos_crtc->type == out_type)
+			return exynos_crtc->pipe;
+	}
+
+	return -EPERM;
+}
+
+void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
+{
+	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+
+	if (exynos_crtc->ops->te_handler)
+		exynos_crtc->ops->te_handler(exynos_crtc);
+}