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path: root/drivers/gpu/drm/exynos/exynos_drm_plane.c
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Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_plane.c')
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_plane.c232
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;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-18 12:59:21 +0000