Initial import

1 files changed, 232 insertions, 0 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c b/drivers/gpu/drm/exynos/exynos_drm_plane.c
new file mode 100644
index 000000000..b1180fbe7
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
@@ -0,0 +1,232 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics Co.Ltd
+ * Authors: Joonyoung Shim <jy0922.shim@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/exynos_drm.h>
+#include <drm/drm_plane_helper.h>
+#include "exynos_drm_drv.h"
+#include "exynos_drm_crtc.h"
+#include "exynos_drm_fb.h"
+#include "exynos_drm_gem.h"
+#include "exynos_drm_plane.h"
+
+static const uint32_t formats[] = {
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_NV12,
+};
+
+/*
+ * This function is to get X or Y size shown via screen. This needs length and
+ * start position of CRTC.
+ *
+ *      <--- length --->
+ * CRTC ----------------
+ *      ^ start        ^ end
+ *
+ * There are six cases from a to f.
+ *
+ *             <----- SCREEN ----->
+ *             0                 last
+ *   ----------|------------------|----------
+ * CRTCs
+ * a -------
+ *        b -------
+ *        c --------------------------
+ *                 d --------
+ *                           e -------
+ *                                  f -------
+ */
+static int exynos_plane_get_size(int start, unsigned length, unsigned last)
+{
+	int end = start + length;
+	int size = 0;
+
+	if (start <= 0) {
+		if (end > 0)
+			size = min_t(unsigned, end, last);
+	} else if (start <= last) {
+		size = min_t(unsigned, last - start, length);
+	}
+
+	return size;
+}
+
+int exynos_check_plane(struct drm_plane *plane, struct drm_framebuffer *fb)
+{
+	struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
+	int nr;
+	int i;
+
+	nr = exynos_drm_fb_get_buf_cnt(fb);
+	for (i = 0; i < nr; i++) {
+		struct exynos_drm_gem_buf *buffer = exynos_drm_fb_buffer(fb, i);
+
+		if (!buffer) {
+			DRM_DEBUG_KMS("buffer is null\n");
+			return -EFAULT;
+		}
+
+		exynos_plane->dma_addr[i] = buffer->dma_addr + fb->offsets[i];
+
+		DRM_DEBUG_KMS("buffer: %d, dma_addr = 0x%lx\n",
+				i, (unsigned long)exynos_plane->dma_addr[i]);
+	}
+
+	return 0;
+}
+
+void exynos_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)
+{
+	struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
+	unsigned int actual_w;
+	unsigned int actual_h;
+
+	actual_w = exynos_plane_get_size(crtc_x, crtc_w, crtc->mode.hdisplay);
+	actual_h = exynos_plane_get_size(crtc_y, crtc_h, crtc->mode.vdisplay);
+
+	if (crtc_x < 0) {
+		if (actual_w)
+			src_x -= crtc_x;
+		crtc_x = 0;
+	}
+
+	if (crtc_y < 0) {
+		if (actual_h)
+			src_y -= crtc_y;
+		crtc_y = 0;
+	}
+
+	/* set ratio */
+	exynos_plane->h_ratio = (src_w << 16) / crtc_w;
+	exynos_plane->v_ratio = (src_h << 16) / crtc_h;
+
+	/* set drm framebuffer data. */
+	exynos_plane->src_x = src_x;
+	exynos_plane->src_y = src_y;
+	exynos_plane->src_width = (actual_w * exynos_plane->h_ratio) >> 16;
+	exynos_plane->src_height = (actual_h * exynos_plane->v_ratio) >> 16;
+	exynos_plane->fb_width = fb->width;
+	exynos_plane->fb_height = fb->height;
+	exynos_plane->bpp = fb->bits_per_pixel;
+	exynos_plane->pitch = fb->pitches[0];
+	exynos_plane->pixel_format = fb->pixel_format;
+
+	/* set plane range to be displayed. */
+	exynos_plane->crtc_x = crtc_x;
+	exynos_plane->crtc_y = crtc_y;
+	exynos_plane->crtc_width = actual_w;
+	exynos_plane->crtc_height = actual_h;
+
+	/* set drm mode data. */
+	exynos_plane->mode_width = crtc->mode.hdisplay;
+	exynos_plane->mode_height = crtc->mode.vdisplay;
+	exynos_plane->refresh = crtc->mode.vrefresh;
+	exynos_plane->scan_flag = crtc->mode.flags;
+
+	DRM_DEBUG_KMS("plane : offset_x/y(%d,%d), width/height(%d,%d)",
+			exynos_plane->crtc_x, exynos_plane->crtc_y,
+			exynos_plane->crtc_width, exynos_plane->crtc_height);
+
+	plane->crtc = crtc;
+}
+
+int
+exynos_update_plane(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 exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+	struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
+	int ret;
+
+	ret = exynos_check_plane(plane, fb);
+	if (ret < 0)
+		return ret;
+
+	exynos_plane_mode_set(plane, crtc, fb, crtc_x, crtc_y,
+			      crtc_w, crtc_h, src_x >> 16, src_y >> 16,
+			      src_w >> 16, src_h >> 16);
+
+	if (exynos_crtc->ops->win_commit)
+		exynos_crtc->ops->win_commit(exynos_crtc, exynos_plane->zpos);
+
+	return 0;
+}
+
+static int exynos_disable_plane(struct drm_plane *plane)
+{
+	struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
+	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(plane->crtc);
+
+	if (exynos_crtc && exynos_crtc->ops->win_disable)
+		exynos_crtc->ops->win_disable(exynos_crtc,
+					      exynos_plane->zpos);
+
+	return 0;
+}
+
+static struct drm_plane_funcs exynos_plane_funcs = {
+	.update_plane	= exynos_update_plane,
+	.disable_plane	= exynos_disable_plane,
+	.destroy	= drm_plane_cleanup,
+};
+
+static void exynos_plane_attach_zpos_property(struct drm_plane *plane,
+					      unsigned int zpos)
+{
+	struct drm_device *dev = plane->dev;
+	struct exynos_drm_private *dev_priv = dev->dev_private;
+	struct drm_property *prop;
+
+	prop = dev_priv->plane_zpos_property;
+	if (!prop) {
+		prop = drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE,
+						 "zpos", 0, MAX_PLANE - 1);
+		if (!prop)
+			return;
+
+		dev_priv->plane_zpos_property = prop;
+	}
+
+	drm_object_attach_property(&plane->base, prop, zpos);
+}
+
+int exynos_plane_init(struct drm_device *dev,
+		      struct exynos_drm_plane *exynos_plane,
+		      unsigned long possible_crtcs, enum drm_plane_type type,
+		      unsigned int zpos)
+{
+	int err;
+
+	err = drm_universal_plane_init(dev, &exynos_plane->base, possible_crtcs,
+				       &exynos_plane_funcs, formats,
+				       ARRAY_SIZE(formats), type);
+	if (err) {
+		DRM_ERROR("failed to initialize plane\n");
+		return err;
+	}
+
+	exynos_plane->zpos = zpos;
+
+	if (type == DRM_PLANE_TYPE_OVERLAY)
+		exynos_plane_attach_zpos_property(&exynos_plane->base, zpos);
+
+	return 0;
+}