1 files changed, 471 insertions, 0 deletions

diff --git a/drivers/gpu/drm/omapdrm/omap_fb.c b/drivers/gpu/drm/omapdrm/omap_fb.c
new file mode 100644
index 0000000..8031402
--- /dev/null
+++ b/drivers/gpu/drm/omapdrm/omap_fb.c
@@ -0,0 +1,471 @@
+/*
+ * drivers/gpu/drm/omapdrm/omap_fb.c
+ *
+ * Copyright (C) 2011 Texas Instruments
+ * Author: Rob Clark <rob@ti.com>
+ *
+ * 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 "omap_drv.h"
+#include "omap_dmm_tiler.h"
+
+#include "drm_crtc.h"
+#include "drm_crtc_helper.h"
+
+/*
+ * framebuffer funcs
+ */
+
+/* per-format info: */
+struct format {
+	enum omap_color_mode dss_format;
+	uint32_t pixel_format;
+	struct {
+		int stride_bpp;           /* this times width is stride */
+		int sub_y;                /* sub-sample in y dimension */
+	} planes[4];
+	bool yuv;
+};
+
+static const struct format formats[] = {
+	/* 16bpp [A]RGB: */
+	{ OMAP_DSS_COLOR_RGB16,       DRM_FORMAT_RGB565,   {{2, 1}}, false }, /* RGB16-565 */
+	{ OMAP_DSS_COLOR_RGB12U,      DRM_FORMAT_RGBX4444, {{2, 1}}, false }, /* RGB12x-4444 */
+	{ OMAP_DSS_COLOR_RGBX16,      DRM_FORMAT_XRGB4444, {{2, 1}}, false }, /* xRGB12-4444 */
+	{ OMAP_DSS_COLOR_RGBA16,      DRM_FORMAT_RGBA4444, {{2, 1}}, false }, /* RGBA12-4444 */
+	{ OMAP_DSS_COLOR_ARGB16,      DRM_FORMAT_ARGB4444, {{2, 1}}, false }, /* ARGB16-4444 */
+	{ OMAP_DSS_COLOR_XRGB16_1555, DRM_FORMAT_XRGB1555, {{2, 1}}, false }, /* xRGB15-1555 */
+	{ OMAP_DSS_COLOR_ARGB16_1555, DRM_FORMAT_ARGB1555, {{2, 1}}, false }, /* ARGB16-1555 */
+	/* 24bpp RGB: */
+	{ OMAP_DSS_COLOR_RGB24P,      DRM_FORMAT_RGB888,   {{3, 1}}, false }, /* RGB24-888 */
+	/* 32bpp [A]RGB: */
+	{ OMAP_DSS_COLOR_RGBX32,      DRM_FORMAT_RGBX8888, {{4, 1}}, false }, /* RGBx24-8888 */
+	{ OMAP_DSS_COLOR_RGB24U,      DRM_FORMAT_XRGB8888, {{4, 1}}, false }, /* xRGB24-8888 */
+	{ OMAP_DSS_COLOR_RGBA32,      DRM_FORMAT_RGBA8888, {{4, 1}}, false }, /* RGBA32-8888 */
+	{ OMAP_DSS_COLOR_ARGB32,      DRM_FORMAT_ARGB8888, {{4, 1}}, false }, /* ARGB32-8888 */
+	/* YUV: */
+	{ OMAP_DSS_COLOR_NV12,        DRM_FORMAT_NV12,     {{1, 1}, {1, 2}}, true },
+	{ OMAP_DSS_COLOR_YUV2,        DRM_FORMAT_YUYV,     {{2, 1}}, true },
+	{ OMAP_DSS_COLOR_UYVY,        DRM_FORMAT_UYVY,     {{2, 1}}, true },
+};
+
+/* convert from overlay's pixel formats bitmask to an array of fourcc's */
+uint32_t omap_framebuffer_get_formats(uint32_t *pixel_formats,
+		uint32_t max_formats, enum omap_color_mode supported_modes)
+{
+	uint32_t nformats = 0;
+	int i = 0;
+
+	for (i = 0; i < ARRAY_SIZE(formats) && nformats < max_formats; i++)
+		if (formats[i].dss_format & supported_modes)
+			pixel_formats[nformats++] = formats[i].pixel_format;
+
+	return nformats;
+}
+
+/* per-plane info for the fb: */
+struct plane {
+	struct drm_gem_object *bo;
+	uint32_t pitch;
+	uint32_t offset;
+	dma_addr_t paddr;
+};
+
+#define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
+
+struct omap_framebuffer {
+	struct drm_framebuffer base;
+	const struct format *format;
+	struct plane planes[4];
+};
+
+static int omap_framebuffer_create_handle(struct drm_framebuffer *fb,
+		struct drm_file *file_priv,
+		unsigned int *handle)
+{
+	struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
+	return drm_gem_handle_create(file_priv,
+			omap_fb->planes[0].bo, handle);
+}
+
+static void omap_framebuffer_destroy(struct drm_framebuffer *fb)
+{
+	struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
+	int i, n = drm_format_num_planes(fb->pixel_format);
+
+	DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);
+
+	drm_framebuffer_cleanup(fb);
+
+	for (i = 0; i < n; i++) {
+		struct plane *plane = &omap_fb->planes[i];
+		if (plane->bo)
+			drm_gem_object_unreference_unlocked(plane->bo);
+	}
+
+	kfree(omap_fb);
+}
+
+static int omap_framebuffer_dirty(struct drm_framebuffer *fb,
+		struct drm_file *file_priv, unsigned flags, unsigned color,
+		struct drm_clip_rect *clips, unsigned num_clips)
+{
+	int i;
+
+	for (i = 0; i < num_clips; i++) {
+		omap_framebuffer_flush(fb, clips[i].x1, clips[i].y1,
+					clips[i].x2 - clips[i].x1,
+					clips[i].y2 - clips[i].y1);
+	}
+
+	return 0;
+}
+
+static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
+	.create_handle = omap_framebuffer_create_handle,
+	.destroy = omap_framebuffer_destroy,
+	.dirty = omap_framebuffer_dirty,
+};
+
+static uint32_t get_linear_addr(struct plane *plane,
+		const struct format *format, int n, int x, int y)
+{
+	uint32_t offset;
+
+	offset = plane->offset +
+			(x * format->planes[n].stride_bpp) +
+			(y * plane->pitch / format->planes[n].sub_y);
+
+	return plane->paddr + offset;
+}
+
+/* update ovl info for scanout, handles cases of multi-planar fb's, etc.
+ */
+void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
+		struct omap_drm_window *win, struct omap_overlay_info *info)
+{
+	struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
+	const struct format *format = omap_fb->format;
+	struct plane *plane = &omap_fb->planes[0];
+	uint32_t x, y, orient = 0;
+
+	info->color_mode = format->dss_format;
+
+	info->pos_x      = win->crtc_x;
+	info->pos_y      = win->crtc_y;
+	info->out_width  = win->crtc_w;
+	info->out_height = win->crtc_h;
+	info->width      = win->src_w;
+	info->height     = win->src_h;
+
+	x = win->src_x;
+	y = win->src_y;
+
+	if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) {
+		uint32_t w = win->src_w;
+		uint32_t h = win->src_h;
+
+		switch (win->rotation & 0xf) {
+		default:
+			dev_err(fb->dev->dev, "invalid rotation: %02x",
+					(uint32_t)win->rotation);
+			/* fallthru to default to no rotation */
+		case 0:
+		case BIT(DRM_ROTATE_0):
+			orient = 0;
+			break;
+		case BIT(DRM_ROTATE_90):
+			orient = MASK_XY_FLIP | MASK_X_INVERT;
+			break;
+		case BIT(DRM_ROTATE_180):
+			orient = MASK_X_INVERT | MASK_Y_INVERT;
+			break;
+		case BIT(DRM_ROTATE_270):
+			orient = MASK_XY_FLIP | MASK_Y_INVERT;
+			break;
+		}
+
+		if (win->rotation & BIT(DRM_REFLECT_X))
+			orient ^= MASK_X_INVERT;
+
+		if (win->rotation & BIT(DRM_REFLECT_Y))
+			orient ^= MASK_Y_INVERT;
+
+		/* adjust x,y offset for flip/invert: */
+		if (orient & MASK_XY_FLIP)
+			swap(w, h);
+		if (orient & MASK_Y_INVERT)
+			y += h - 1;
+		if (orient & MASK_X_INVERT)
+			x += w - 1;
+
+		omap_gem_rotated_paddr(plane->bo, orient, x, y, &info->paddr);
+		info->rotation_type = OMAP_DSS_ROT_TILER;
+		info->screen_width  = omap_gem_tiled_stride(plane->bo, orient);
+	} else {
+		info->paddr         = get_linear_addr(plane, format, 0, x, y);
+		info->rotation_type = OMAP_DSS_ROT_DMA;
+		info->screen_width  = plane->pitch;
+	}
+
+	/* convert to pixels: */
+	info->screen_width /= format->planes[0].stride_bpp;
+
+	if (format->dss_format == OMAP_DSS_COLOR_NV12) {
+		plane = &omap_fb->planes[1];
+
+		if (info->rotation_type == OMAP_DSS_ROT_TILER) {
+			WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED));
+			omap_gem_rotated_paddr(plane->bo, orient,
+					x/2, y/2, &info->p_uv_addr);
+		} else {
+			info->p_uv_addr = get_linear_addr(plane, format, 1, x, y);
+		}
+	} else {
+		info->p_uv_addr = 0;
+	}
+}
+
+/* Call for unpin 'a' (if not NULL), and pin 'b' (if not NULL).  Although
+ * buffers to unpin are just pushed to the unpin fifo so that the
+ * caller can defer unpin until vblank.
+ *
+ * Note if this fails (ie. something went very wrong!), all buffers are
+ * unpinned, and the caller disables the overlay.  We could have tried
+ * to revert back to the previous set of pinned buffers but if things are
+ * hosed there is no guarantee that would succeed.
+ */
+int omap_framebuffer_replace(struct drm_framebuffer *a,
+		struct drm_framebuffer *b, void *arg,
+		void (*unpin)(void *arg, struct drm_gem_object *bo))
+{
+	int ret = 0, i, na, nb;
+	struct omap_framebuffer *ofba = to_omap_framebuffer(a);
+	struct omap_framebuffer *ofbb = to_omap_framebuffer(b);
+	uint32_t pinned_mask = 0;
+
+	na = a ? drm_format_num_planes(a->pixel_format) : 0;
+	nb = b ? drm_format_num_planes(b->pixel_format) : 0;
+
+	for (i = 0; i < max(na, nb); i++) {
+		struct plane *pa, *pb;
+
+		pa = (i < na) ? &ofba->planes[i] : NULL;
+		pb = (i < nb) ? &ofbb->planes[i] : NULL;
+
+		if (pa)
+			unpin(arg, pa->bo);
+
+		if (pb && !ret) {
+			ret = omap_gem_get_paddr(pb->bo, &pb->paddr, true);
+			if (!ret) {
+				omap_gem_dma_sync(pb->bo, DMA_TO_DEVICE);
+				pinned_mask |= (1 << i);
+			}
+		}
+	}
+
+	if (ret) {
+		/* something went wrong.. unpin what has been pinned */
+		for (i = 0; i < nb; i++) {
+			if (pinned_mask & (1 << i)) {
+				struct plane *pb = &ofba->planes[i];
+				unpin(arg, pb->bo);
+			}
+		}
+	}
+
+	return ret;
+}
+
+struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p)
+{
+	struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
+	if (p >= drm_format_num_planes(fb->pixel_format))
+		return NULL;
+	return omap_fb->planes[p].bo;
+}
+
+/* iterate thru all the connectors, returning ones that are attached
+ * to the same fb..
+ */
+struct drm_connector *omap_framebuffer_get_next_connector(
+		struct drm_framebuffer *fb, struct drm_connector *from)
+{
+	struct drm_device *dev = fb->dev;
+	struct list_head *connector_list = &dev->mode_config.connector_list;
+	struct drm_connector *connector = from;
+
+	if (!from)
+		return list_first_entry(connector_list, typeof(*from), head);
+
+	list_for_each_entry_from(connector, connector_list, head) {
+		if (connector != from) {
+			struct drm_encoder *encoder = connector->encoder;
+			struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
+			if (crtc && crtc->fb == fb)
+				return connector;
+
+		}
+	}
+
+	return NULL;
+}
+
+/* flush an area of the framebuffer (in case of manual update display that
+ * is not automatically flushed)
+ */
+void omap_framebuffer_flush(struct drm_framebuffer *fb,
+		int x, int y, int w, int h)
+{
+	struct drm_connector *connector = NULL;
+
+	VERB("flush: %d,%d %dx%d, fb=%p", x, y, w, h, fb);
+
+	while ((connector = omap_framebuffer_get_next_connector(fb, connector))) {
+		/* only consider connectors that are part of a chain */
+		if (connector->encoder && connector->encoder->crtc) {
+			/* TODO: maybe this should propagate thru the crtc who
+			 * could do the coordinate translation..
+			 */
+			struct drm_crtc *crtc = connector->encoder->crtc;
+			int cx = max(0, x - crtc->x);
+			int cy = max(0, y - crtc->y);
+			int cw = w + (x - crtc->x) - cx;
+			int ch = h + (y - crtc->y) - cy;
+
+			omap_connector_flush(connector, cx, cy, cw, ch);
+		}
+	}
+}
+
+#ifdef CONFIG_DEBUG_FS
+void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
+{
+	struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
+	int i, n = drm_format_num_planes(fb->pixel_format);
+
+	seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
+			(char *)&fb->pixel_format);
+
+	for (i = 0; i < n; i++) {
+		struct plane *plane = &omap_fb->planes[i];
+		seq_printf(m, "   %d: offset=%d pitch=%d, obj: ",
+				i, plane->offset, plane->pitch);
+		omap_gem_describe(plane->bo, m);
+	}
+}
+#endif
+
+struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
+		struct drm_file *file, struct drm_mode_fb_cmd2 *mode_cmd)
+{
+	struct drm_gem_object *bos[4];
+	struct drm_framebuffer *fb;
+	int ret;
+
+	ret = objects_lookup(dev, file, mode_cmd->pixel_format,
+			bos, mode_cmd->handles);
+	if (ret)
+		return ERR_PTR(ret);
+
+	fb = omap_framebuffer_init(dev, mode_cmd, bos);
+	if (IS_ERR(fb)) {
+		int i, n = drm_format_num_planes(mode_cmd->pixel_format);
+		for (i = 0; i < n; i++)
+			drm_gem_object_unreference_unlocked(bos[i]);
+		return fb;
+	}
+	return fb;
+}
+
+struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
+		struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
+{
+	struct omap_framebuffer *omap_fb;
+	struct drm_framebuffer *fb = NULL;
+	const struct format *format = NULL;
+	int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
+
+	DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
+			dev, mode_cmd, mode_cmd->width, mode_cmd->height,
+			(char *)&mode_cmd->pixel_format);
+
+	for (i = 0; i < ARRAY_SIZE(formats); i++) {
+		if (formats[i].pixel_format == mode_cmd->pixel_format) {
+			format = &formats[i];
+			break;
+		}
+	}
+
+	if (!format) {
+		dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
+				(char *)&mode_cmd->pixel_format);
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
+	if (!omap_fb) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	fb = &omap_fb->base;
+	omap_fb->format = format;
+
+	for (i = 0; i < n; i++) {
+		struct plane *plane = &omap_fb->planes[i];
+		int size, pitch = mode_cmd->pitches[i];
+
+		if (pitch < (mode_cmd->width * format->planes[i].stride_bpp)) {
+			dev_err(dev->dev, "provided buffer pitch is too small! %d < %d\n",
+					pitch, mode_cmd->width * format->planes[i].stride_bpp);
+			ret = -EINVAL;
+			goto fail;
+		}
+
+		size = pitch * mode_cmd->height / format->planes[i].sub_y;
+
+		if (size > (omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i])) {
+			dev_err(dev->dev, "provided buffer object is too small! %d < %d\n",
+					bos[i]->size - mode_cmd->offsets[i], size);
+			ret = -EINVAL;
+			goto fail;
+		}
+
+		plane->bo     = bos[i];
+		plane->offset = mode_cmd->offsets[i];
+		plane->pitch  = pitch;
+		plane->paddr  = 0;
+	}
+
+	drm_helper_mode_fill_fb_struct(fb, mode_cmd);
+
+	ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
+	if (ret) {
+		dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
+		goto fail;
+	}
+
+	DBG("create: FB ID: %d (%p)", fb->base.id, fb);
+
+	return fb;
+
+fail:
+	if (fb)
+		omap_framebuffer_destroy(fb);
+
+	return ERR_PTR(ret);
+}