1 files changed, 450 insertions, 0 deletions
diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c b/drivers/gpu/drm/omapdrm/omap_plane.c
new file mode 100644
index 000000000000..dd68d14ce615
--- /dev/null
+++ b/drivers/gpu/drm/omapdrm/omap_plane.c
@@ -0,0 +1,450 @@
+/*
+ * drivers/gpu/drm/omapdrm/omap_plane.c
+ *
+ * Copyright (C) 2011 Texas Instruments
+ * Author: Rob Clark <rob.clark@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kfifo.h>
+
+#include "omap_drv.h"
+#include "omap_dmm_tiler.h"
+
+/* some hackery because omapdss has an 'enum omap_plane' (which would be
+ * better named omap_plane_id).. and compiler seems unhappy about having
+ * both a 'struct omap_plane' and 'enum omap_plane'
+ */
+#define omap_plane _omap_plane
+
+/*
+ * plane funcs
+ */
+
+struct callback {
+	void (*fxn)(void *);
+	void *arg;
+};
+
+#define to_omap_plane(x) container_of(x, struct omap_plane, base)
+
+struct omap_plane {
+	struct drm_plane base;
+	int id;  /* TODO rename omap_plane -> omap_plane_id in omapdss so I can use the enum */
+	const char *name;
+	struct omap_overlay_info info;
+	struct omap_drm_apply apply;
+
+	/* position/orientation of scanout within the fb: */
+	struct omap_drm_window win;
+	bool enabled;
+
+	/* last fb that we pinned: */
+	struct drm_framebuffer *pinned_fb;
+
+	uint32_t nformats;
+	uint32_t formats[32];
+
+	struct omap_drm_irq error_irq;
+
+	/* set of bo's pending unpin until next post_apply() */
+	DECLARE_KFIFO_PTR(unpin_fifo, struct drm_gem_object *);
+
+	// XXX maybe get rid of this and handle vblank in crtc too?
+	struct callback apply_done_cb;
+};
+
+static void unpin(void *arg, struct drm_gem_object *bo)
+{
+	struct drm_plane *plane = arg;
+	struct omap_plane *omap_plane = to_omap_plane(plane);
+
+	if (kfifo_put(&omap_plane->unpin_fifo,
+			(const struct drm_gem_object **)&bo)) {
+		/* also hold a ref so it isn't free'd while pinned */
+		drm_gem_object_reference(bo);
+	} else {
+		dev_err(plane->dev->dev, "unpin fifo full!\n");
+		omap_gem_put_paddr(bo);
+	}
+}
+
+/* update which fb (if any) is pinned for scanout */
+static int update_pin(struct drm_plane *plane, struct drm_framebuffer *fb)
+{
+	struct omap_plane *omap_plane = to_omap_plane(plane);
+	struct drm_framebuffer *pinned_fb = omap_plane->pinned_fb;
+
+	if (pinned_fb != fb) {
+		int ret;
+
+		DBG("%p -> %p", pinned_fb, fb);
+
+		if (fb)
+			drm_framebuffer_reference(fb);
+
+		ret = omap_framebuffer_replace(pinned_fb, fb, plane, unpin);
+
+		if (pinned_fb)
+			drm_framebuffer_unreference(pinned_fb);
+
+		if (ret) {
+			dev_err(plane->dev->dev, "could not swap %p -> %p\n",
+					omap_plane->pinned_fb, fb);
+			if (fb)
+				drm_framebuffer_unreference(fb);
+			omap_plane->pinned_fb = NULL;
+			return ret;
+		}
+
+		omap_plane->pinned_fb = fb;
+	}
+
+	return 0;
+}
+
+static void omap_plane_pre_apply(struct omap_drm_apply *apply)
+{
+	struct omap_plane *omap_plane =
+			container_of(apply, struct omap_plane, apply);
+	struct omap_drm_window *win = &omap_plane->win;
+	struct drm_plane *plane = &omap_plane->base;
+	struct drm_device *dev = plane->dev;
+	struct omap_overlay_info *info = &omap_plane->info;
+	struct drm_crtc *crtc = plane->crtc;
+	enum omap_channel channel;
+	bool enabled = omap_plane->enabled && crtc;
+	bool ilace, replication;
+	int ret;
+
+	DBG("%s, enabled=%d", omap_plane->name, enabled);
+
+	/* if fb has changed, pin new fb: */
+	update_pin(plane, enabled ? plane->fb : NULL);
+
+	if (!enabled) {
+		dispc_ovl_enable(omap_plane->id, false);
+		return;
+	}
+
+	channel = omap_crtc_channel(crtc);
+
+	/* update scanout: */
+	omap_framebuffer_update_scanout(plane->fb, win, info);
+
+	DBG("%dx%d -> %dx%d (%d)", info->width, info->height,
+			info->out_width, info->out_height,
+			info->screen_width);
+	DBG("%d,%d %08x %08x", info->pos_x, info->pos_y,
+			info->paddr, info->p_uv_addr);
+
+	/* TODO: */
+	ilace = false;
+	replication = false;
+
+	/* and finally, update omapdss: */
+	ret = dispc_ovl_setup(omap_plane->id, info,
+			replication, omap_crtc_timings(crtc), false);
+	if (ret) {
+		dev_err(dev->dev, "dispc_ovl_setup failed: %d\n", ret);
+		return;
+	}
+
+	dispc_ovl_enable(omap_plane->id, true);
+	dispc_ovl_set_channel_out(omap_plane->id, channel);
+}
+
+static void omap_plane_post_apply(struct omap_drm_apply *apply)
+{
+	struct omap_plane *omap_plane =
+			container_of(apply, struct omap_plane, apply);
+	struct drm_plane *plane = &omap_plane->base;
+	struct omap_overlay_info *info = &omap_plane->info;
+	struct drm_gem_object *bo = NULL;
+	struct callback cb;
+
+	cb = omap_plane->apply_done_cb;
+	omap_plane->apply_done_cb.fxn = NULL;
+
+	while (kfifo_get(&omap_plane->unpin_fifo, &bo)) {
+		omap_gem_put_paddr(bo);
+		drm_gem_object_unreference_unlocked(bo);
+	}
+
+	if (cb.fxn)
+		cb.fxn(cb.arg);
+
+	if (omap_plane->enabled) {
+		omap_framebuffer_flush(plane->fb, info->pos_x, info->pos_y,
+				info->out_width, info->out_height);
+	}
+}
+
+static int apply(struct drm_plane *plane)
+{
+	if (plane->crtc) {
+		struct omap_plane *omap_plane = to_omap_plane(plane);
+		return omap_crtc_apply(plane->crtc, &omap_plane->apply);
+	}
+	return 0;
+}
+
+int omap_plane_mode_set(struct drm_plane *plane,
+		struct drm_crtc *crtc, struct drm_framebuffer *fb,
+		int crtc_x, int crtc_y,
+		unsigned int crtc_w, unsigned int crtc_h,
+		uint32_t src_x, uint32_t src_y,
+		uint32_t src_w, uint32_t src_h,
+		void (*fxn)(void *), void *arg)
+{
+	struct omap_plane *omap_plane = to_omap_plane(plane);
+	struct omap_drm_window *win = &omap_plane->win;
+
+	win->crtc_x = crtc_x;
+	win->crtc_y = crtc_y;
+	win->crtc_w = crtc_w;
+	win->crtc_h = crtc_h;
+
+	/* src values are in Q16 fixed point, convert to integer: */
+	win->src_x = src_x >> 16;
+	win->src_y = src_y >> 16;
+	win->src_w = src_w >> 16;
+	win->src_h = src_h >> 16;
+
+	if (fxn) {
+		/* omap_crtc should ensure that a new page flip
+		 * isn't permitted while there is one pending:
+		 */
+		BUG_ON(omap_plane->apply_done_cb.fxn);
+
+		omap_plane->apply_done_cb.fxn = fxn;
+		omap_plane->apply_done_cb.arg = arg;
+	}
+
+	plane->fb = fb;
+	plane->crtc = crtc;
+
+	return apply(plane);
+}
+
+static int omap_plane_update(struct drm_plane *plane,
+		struct drm_crtc *crtc, struct drm_framebuffer *fb,
+		int crtc_x, int crtc_y,
+		unsigned int crtc_w, unsigned int crtc_h,
+		uint32_t src_x, uint32_t src_y,
+		uint32_t src_w, uint32_t src_h)
+{
+	struct omap_plane *omap_plane = to_omap_plane(plane);
+	omap_plane->enabled = true;
+	return omap_plane_mode_set(plane, crtc, fb,
+			crtc_x, crtc_y, crtc_w, crtc_h,
+			src_x, src_y, src_w, src_h,
+			NULL, NULL);
+}
+
+static int omap_plane_disable(struct drm_plane *plane)
+{
+	struct omap_plane *omap_plane = to_omap_plane(plane);
+	omap_plane->win.rotation = BIT(DRM_ROTATE_0);
+	return omap_plane_dpms(plane, DRM_MODE_DPMS_OFF);
+}
+
+static void omap_plane_destroy(struct drm_plane *plane)
+{
+	struct omap_plane *omap_plane = to_omap_plane(plane);
+
+	DBG("%s", omap_plane->name);
+
+	omap_irq_unregister(plane->dev, &omap_plane->error_irq);
+
+	omap_plane_disable(plane);
+	drm_plane_cleanup(plane);
+
+	WARN_ON(!kfifo_is_empty(&omap_plane->unpin_fifo));
+	kfifo_free(&omap_plane->unpin_fifo);
+
+	kfree(omap_plane);
+}
+
+int omap_plane_dpms(struct drm_plane *plane, int mode)
+{
+	struct omap_plane *omap_plane = to_omap_plane(plane);
+	bool enabled = (mode == DRM_MODE_DPMS_ON);
+	int ret = 0;
+
+	if (enabled != omap_plane->enabled) {
+		omap_plane->enabled = enabled;
+		ret = apply(plane);
+	}
+
+	return ret;
+}
+
+/* helper to install properties which are common to planes and crtcs */
+void omap_plane_install_properties(struct drm_plane *plane,
+		struct drm_mode_object *obj)
+{
+	struct drm_device *dev = plane->dev;
+	struct omap_drm_private *priv = dev->dev_private;
+	struct drm_property *prop;
+
+	if (priv->has_dmm) {
+		prop = priv->rotation_prop;
+		if (!prop) {
+			const struct drm_prop_enum_list props[] = {
+					{ DRM_ROTATE_0,   "rotate-0" },
+					{ DRM_ROTATE_90,  "rotate-90" },
+					{ DRM_ROTATE_180, "rotate-180" },
+					{ DRM_ROTATE_270, "rotate-270" },
+					{ DRM_REFLECT_X,  "reflect-x" },
+					{ DRM_REFLECT_Y,  "reflect-y" },
+			};
+			prop = drm_property_create_bitmask(dev, 0, "rotation",
+					props, ARRAY_SIZE(props));
+			if (prop == NULL)
+				return;
+			priv->rotation_prop = prop;
+		}
+		drm_object_attach_property(obj, prop, 0);
+	}
+
+	prop = priv->zorder_prop;
+	if (!prop) {
+		prop = drm_property_create_range(dev, 0, "zorder", 0, 3);
+		if (prop == NULL)
+			return;
+		priv->zorder_prop = prop;
+	}
+	drm_object_attach_property(obj, prop, 0);
+}
+
+int omap_plane_set_property(struct drm_plane *plane,
+		struct drm_property *property, uint64_t val)
+{
+	struct omap_plane *omap_plane = to_omap_plane(plane);
+	struct omap_drm_private *priv = plane->dev->dev_private;
+	int ret = -EINVAL;
+
+	if (property == priv->rotation_prop) {
+		DBG("%s: rotation: %02x", omap_plane->name, (uint32_t)val);
+		omap_plane->win.rotation = val;
+		ret = apply(plane);
+	} else if (property == priv->zorder_prop) {
+		DBG("%s: zorder: %02x", omap_plane->name, (uint32_t)val);
+		omap_plane->info.zorder = val;
+		ret = apply(plane);
+	}
+
+	return ret;
+}
+
+static const struct drm_plane_funcs omap_plane_funcs = {
+		.update_plane = omap_plane_update,
+		.disable_plane = omap_plane_disable,
+		.destroy = omap_plane_destroy,
+		.set_property = omap_plane_set_property,
+};
+
+static void omap_plane_error_irq(struct omap_drm_irq *irq, uint32_t irqstatus)
+{
+	struct omap_plane *omap_plane =
+			container_of(irq, struct omap_plane, error_irq);
+	DRM_ERROR("%s: errors: %08x\n", omap_plane->name, irqstatus);
+}
+
+static const char *plane_names[] = {
+		[OMAP_DSS_GFX] = "gfx",
+		[OMAP_DSS_VIDEO1] = "vid1",
+		[OMAP_DSS_VIDEO2] = "vid2",
+		[OMAP_DSS_VIDEO3] = "vid3",
+};
+
+static const uint32_t error_irqs[] = {
+		[OMAP_DSS_GFX] = DISPC_IRQ_GFX_FIFO_UNDERFLOW,
+		[OMAP_DSS_VIDEO1] = DISPC_IRQ_VID1_FIFO_UNDERFLOW,
+		[OMAP_DSS_VIDEO2] = DISPC_IRQ_VID2_FIFO_UNDERFLOW,
+		[OMAP_DSS_VIDEO3] = DISPC_IRQ_VID3_FIFO_UNDERFLOW,
+};
+
+/* initialize plane */
+struct drm_plane *omap_plane_init(struct drm_device *dev,
+		int id, bool private_plane)
+{
+	struct omap_drm_private *priv = dev->dev_private;
+	struct drm_plane *plane = NULL;
+	struct omap_plane *omap_plane;
+	struct omap_overlay_info *info;
+	int ret;
+
+	DBG("%s: priv=%d", plane_names[id], private_plane);
+
+	omap_plane = kzalloc(sizeof(*omap_plane), GFP_KERNEL);
+	if (!omap_plane) {
+		dev_err(dev->dev, "could not allocate plane\n");
+		goto fail;
+	}
+
+	ret = kfifo_alloc(&omap_plane->unpin_fifo, 16, GFP_KERNEL);
+	if (ret) {
+		dev_err(dev->dev, "could not allocate unpin FIFO\n");
+		goto fail;
+	}
+
+	omap_plane->nformats = omap_framebuffer_get_formats(
+			omap_plane->formats, ARRAY_SIZE(omap_plane->formats),
+			dss_feat_get_supported_color_modes(id));
+	omap_plane->id = id;
+	omap_plane->name = plane_names[id];
+
+	plane = &omap_plane->base;
+
+	omap_plane->apply.pre_apply  = omap_plane_pre_apply;
+	omap_plane->apply.post_apply = omap_plane_post_apply;
+
+	omap_plane->error_irq.irqmask = error_irqs[id];
+	omap_plane->error_irq.irq = omap_plane_error_irq;
+	omap_irq_register(dev, &omap_plane->error_irq);
+
+	drm_plane_init(dev, plane, (1 << priv->num_crtcs) - 1, &omap_plane_funcs,
+			omap_plane->formats, omap_plane->nformats, private_plane);
+
+	omap_plane_install_properties(plane, &plane->base);
+
+	/* get our starting configuration, set defaults for parameters
+	 * we don't currently use, etc:
+	 */
+	info = &omap_plane->info;
+	info->rotation_type = OMAP_DSS_ROT_DMA;
+	info->rotation = OMAP_DSS_ROT_0;
+	info->global_alpha = 0xff;
+	info->mirror = 0;
+
+	/* Set defaults depending on whether we are a CRTC or overlay
+	 * layer.
+	 * TODO add ioctl to give userspace an API to change this.. this
+	 * will come in a subsequent patch.
+	 */
+	if (private_plane)
+		omap_plane->info.zorder = 0;
+	else
+		omap_plane->info.zorder = id;
+
+	return plane;
+
+fail:
+	if (plane)
+		omap_plane_destroy(plane);
+
+	return NULL;
+}