Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 330 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..b29afced7
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
@@ -0,0 +1,330 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2011 Samsung Electronics Co.Ltd
+ * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
+ */
+
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_plane_helper.h>
+#include <drm/exynos_drm.h>
+
+#include "exynos_drm_crtc.h"
+#include "exynos_drm_drv.h"
+#include "exynos_drm_fb.h"
+#include "exynos_drm_gem.h"
+#include "exynos_drm_plane.h"
+
+/*
+ * 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;
+}
+
+static void exynos_plane_mode_set(struct exynos_drm_plane_state *exynos_state)
+{
+	struct drm_plane_state *state = &exynos_state->base;
+	struct drm_crtc *crtc = state->crtc;
+	struct drm_crtc_state *crtc_state =
+			drm_atomic_get_existing_crtc_state(state->state, crtc);
+	struct drm_display_mode *mode = &crtc_state->adjusted_mode;
+	int crtc_x, crtc_y;
+	unsigned int crtc_w, crtc_h;
+	unsigned int src_x, src_y;
+	unsigned int src_w, src_h;
+	unsigned int actual_w;
+	unsigned int actual_h;
+
+	/*
+	 * The original src/dest coordinates are stored in exynos_state->base,
+	 * but we want to keep another copy internal to our driver that we can
+	 * clip/modify ourselves.
+	 */
+
+	crtc_x = state->crtc_x;
+	crtc_y = state->crtc_y;
+	crtc_w = state->crtc_w;
+	crtc_h = state->crtc_h;
+
+	src_x = state->src_x >> 16;
+	src_y = state->src_y >> 16;
+	src_w = state->src_w >> 16;
+	src_h = state->src_h >> 16;
+
+	/* set ratio */
+	exynos_state->h_ratio = (src_w << 16) / crtc_w;
+	exynos_state->v_ratio = (src_h << 16) / crtc_h;
+
+	/* clip to visible area */
+	actual_w = exynos_plane_get_size(crtc_x, crtc_w, mode->hdisplay);
+	actual_h = exynos_plane_get_size(crtc_y, crtc_h, mode->vdisplay);
+
+	if (crtc_x < 0) {
+		if (actual_w)
+			src_x += ((-crtc_x) * exynos_state->h_ratio) >> 16;
+		crtc_x = 0;
+	}
+
+	if (crtc_y < 0) {
+		if (actual_h)
+			src_y += ((-crtc_y) * exynos_state->v_ratio) >> 16;
+		crtc_y = 0;
+	}
+
+	/* set drm framebuffer data. */
+	exynos_state->src.x = src_x;
+	exynos_state->src.y = src_y;
+	exynos_state->src.w = (actual_w * exynos_state->h_ratio) >> 16;
+	exynos_state->src.h = (actual_h * exynos_state->v_ratio) >> 16;
+
+	/* set plane range to be displayed. */
+	exynos_state->crtc.x = crtc_x;
+	exynos_state->crtc.y = crtc_y;
+	exynos_state->crtc.w = actual_w;
+	exynos_state->crtc.h = actual_h;
+
+	DRM_DEV_DEBUG_KMS(crtc->dev->dev,
+			  "plane : offset_x/y(%d,%d), width/height(%d,%d)",
+			  exynos_state->crtc.x, exynos_state->crtc.y,
+			  exynos_state->crtc.w, exynos_state->crtc.h);
+}
+
+static void exynos_drm_plane_reset(struct drm_plane *plane)
+{
+	struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
+	struct exynos_drm_plane_state *exynos_state;
+
+	if (plane->state) {
+		exynos_state = to_exynos_plane_state(plane->state);
+		__drm_atomic_helper_plane_destroy_state(plane->state);
+		kfree(exynos_state);
+		plane->state = NULL;
+	}
+
+	exynos_state = kzalloc(sizeof(*exynos_state), GFP_KERNEL);
+	if (exynos_state) {
+		__drm_atomic_helper_plane_reset(plane, &exynos_state->base);
+		plane->state->zpos = exynos_plane->config->zpos;
+	}
+}
+
+static struct drm_plane_state *
+exynos_drm_plane_duplicate_state(struct drm_plane *plane)
+{
+	struct exynos_drm_plane_state *exynos_state;
+	struct exynos_drm_plane_state *copy;
+
+	exynos_state = to_exynos_plane_state(plane->state);
+	copy = kzalloc(sizeof(*exynos_state), GFP_KERNEL);
+	if (!copy)
+		return NULL;
+
+	__drm_atomic_helper_plane_duplicate_state(plane, &copy->base);
+	return &copy->base;
+}
+
+static void exynos_drm_plane_destroy_state(struct drm_plane *plane,
+					   struct drm_plane_state *old_state)
+{
+	struct exynos_drm_plane_state *old_exynos_state =
+					to_exynos_plane_state(old_state);
+	__drm_atomic_helper_plane_destroy_state(old_state);
+	kfree(old_exynos_state);
+}
+
+static struct drm_plane_funcs exynos_plane_funcs = {
+	.update_plane	= drm_atomic_helper_update_plane,
+	.disable_plane	= drm_atomic_helper_disable_plane,
+	.destroy	= drm_plane_cleanup,
+	.reset		= exynos_drm_plane_reset,
+	.atomic_duplicate_state = exynos_drm_plane_duplicate_state,
+	.atomic_destroy_state = exynos_drm_plane_destroy_state,
+};
+
+static int
+exynos_drm_plane_check_format(const struct exynos_drm_plane_config *config,
+			      struct exynos_drm_plane_state *state)
+{
+	struct drm_framebuffer *fb = state->base.fb;
+	struct drm_device *dev = fb->dev;
+
+	switch (fb->modifier) {
+	case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE:
+		if (!(config->capabilities & EXYNOS_DRM_PLANE_CAP_TILE))
+			return -ENOTSUPP;
+		break;
+
+	case DRM_FORMAT_MOD_LINEAR:
+		break;
+
+	default:
+		DRM_DEV_ERROR(dev->dev, "unsupported pixel format modifier");
+		return -ENOTSUPP;
+	}
+
+	return 0;
+}
+
+static int
+exynos_drm_plane_check_size(const struct exynos_drm_plane_config *config,
+			    struct exynos_drm_plane_state *state)
+{
+	struct drm_crtc *crtc = state->base.crtc;
+	bool width_ok = false, height_ok = false;
+
+	if (config->capabilities & EXYNOS_DRM_PLANE_CAP_SCALE)
+		return 0;
+
+	if (state->src.w == state->crtc.w)
+		width_ok = true;
+
+	if (state->src.h == state->crtc.h)
+		height_ok = true;
+
+	if ((config->capabilities & EXYNOS_DRM_PLANE_CAP_DOUBLE) &&
+	    state->h_ratio == (1 << 15))
+		width_ok = true;
+
+	if ((config->capabilities & EXYNOS_DRM_PLANE_CAP_DOUBLE) &&
+	    state->v_ratio == (1 << 15))
+		height_ok = true;
+
+	if (width_ok && height_ok)
+		return 0;
+
+	DRM_DEV_DEBUG_KMS(crtc->dev->dev, "scaling mode is not supported");
+	return -ENOTSUPP;
+}
+
+static int exynos_plane_atomic_check(struct drm_plane *plane,
+				     struct drm_plane_state *state)
+{
+	struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
+	struct exynos_drm_plane_state *exynos_state =
+						to_exynos_plane_state(state);
+	int ret = 0;
+
+	if (!state->crtc || !state->fb)
+		return 0;
+
+	/* translate state into exynos_state */
+	exynos_plane_mode_set(exynos_state);
+
+	ret = exynos_drm_plane_check_format(exynos_plane->config, exynos_state);
+	if (ret)
+		return ret;
+
+	ret = exynos_drm_plane_check_size(exynos_plane->config, exynos_state);
+	return ret;
+}
+
+static void exynos_plane_atomic_update(struct drm_plane *plane,
+				       struct drm_plane_state *old_state)
+{
+	struct drm_plane_state *state = plane->state;
+	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(state->crtc);
+	struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
+
+	if (!state->crtc)
+		return;
+
+	if (exynos_crtc->ops->update_plane)
+		exynos_crtc->ops->update_plane(exynos_crtc, exynos_plane);
+}
+
+static void exynos_plane_atomic_disable(struct drm_plane *plane,
+					struct drm_plane_state *old_state)
+{
+	struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
+	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(old_state->crtc);
+
+	if (!old_state->crtc)
+		return;
+
+	if (exynos_crtc->ops->disable_plane)
+		exynos_crtc->ops->disable_plane(exynos_crtc, exynos_plane);
+}
+
+static const struct drm_plane_helper_funcs plane_helper_funcs = {
+	.atomic_check = exynos_plane_atomic_check,
+	.atomic_update = exynos_plane_atomic_update,
+	.atomic_disable = exynos_plane_atomic_disable,
+};
+
+static void exynos_plane_attach_zpos_property(struct drm_plane *plane,
+					      int zpos, bool immutable)
+{
+	if (immutable)
+		drm_plane_create_zpos_immutable_property(plane, zpos);
+	else
+		drm_plane_create_zpos_property(plane, zpos, 0, MAX_PLANE - 1);
+}
+
+int exynos_plane_init(struct drm_device *dev,
+		      struct exynos_drm_plane *exynos_plane, unsigned int index,
+		      const struct exynos_drm_plane_config *config)
+{
+	int err;
+	unsigned int supported_modes = BIT(DRM_MODE_BLEND_PIXEL_NONE) |
+				       BIT(DRM_MODE_BLEND_PREMULTI) |
+				       BIT(DRM_MODE_BLEND_COVERAGE);
+	struct drm_plane *plane = &exynos_plane->base;
+
+	err = drm_universal_plane_init(dev, &exynos_plane->base,
+				       1 << dev->mode_config.num_crtc,
+				       &exynos_plane_funcs,
+				       config->pixel_formats,
+				       config->num_pixel_formats,
+				       NULL, config->type, NULL);
+	if (err) {
+		DRM_DEV_ERROR(dev->dev, "failed to initialize plane\n");
+		return err;
+	}
+
+	drm_plane_helper_add(&exynos_plane->base, &plane_helper_funcs);
+
+	exynos_plane->index = index;
+	exynos_plane->config = config;
+
+	exynos_plane_attach_zpos_property(&exynos_plane->base, config->zpos,
+			   !(config->capabilities & EXYNOS_DRM_PLANE_CAP_ZPOS));
+
+	if (config->capabilities & EXYNOS_DRM_PLANE_CAP_PIX_BLEND)
+		drm_plane_create_blend_mode_property(plane, supported_modes);
+
+	if (config->capabilities & EXYNOS_DRM_PLANE_CAP_WIN_BLEND)
+		drm_plane_create_alpha_property(plane);
+
+	return 0;
+}