Adding upstream version 4.19.249.upstream/4.19.249upstream

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

1 files changed, 482 insertions, 0 deletions

diff --git a/drivers/gpu/drm/tegra/plane.c b/drivers/gpu/drm/tegra/plane.c
new file mode 100644
index 000000000..d068e8aa3
--- /dev/null
+++ b/drivers/gpu/drm/tegra/plane.c
@@ -0,0 +1,482 @@
+/*
+ * Copyright (C) 2017 NVIDIA CORPORATION.  All rights reserved.
+ *
+ * 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.
+ */
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_plane_helper.h>
+
+#include "dc.h"
+#include "plane.h"
+
+static void tegra_plane_destroy(struct drm_plane *plane)
+{
+	struct tegra_plane *p = to_tegra_plane(plane);
+
+	drm_plane_cleanup(plane);
+	kfree(p);
+}
+
+static void tegra_plane_reset(struct drm_plane *plane)
+{
+	struct tegra_plane *p = to_tegra_plane(plane);
+	struct tegra_plane_state *state;
+
+	if (plane->state)
+		__drm_atomic_helper_plane_destroy_state(plane->state);
+
+	kfree(plane->state);
+	plane->state = NULL;
+
+	state = kzalloc(sizeof(*state), GFP_KERNEL);
+	if (state) {
+		plane->state = &state->base;
+		plane->state->plane = plane;
+		plane->state->zpos = p->index;
+		plane->state->normalized_zpos = p->index;
+	}
+}
+
+static struct drm_plane_state *
+tegra_plane_atomic_duplicate_state(struct drm_plane *plane)
+{
+	struct tegra_plane_state *state = to_tegra_plane_state(plane->state);
+	struct tegra_plane_state *copy;
+	unsigned int i;
+
+	copy = kmalloc(sizeof(*copy), GFP_KERNEL);
+	if (!copy)
+		return NULL;
+
+	__drm_atomic_helper_plane_duplicate_state(plane, &copy->base);
+	copy->tiling = state->tiling;
+	copy->format = state->format;
+	copy->swap = state->swap;
+	copy->bottom_up = state->bottom_up;
+	copy->opaque = state->opaque;
+
+	for (i = 0; i < 2; i++)
+		copy->blending[i] = state->blending[i];
+
+	return &copy->base;
+}
+
+static void tegra_plane_atomic_destroy_state(struct drm_plane *plane,
+					     struct drm_plane_state *state)
+{
+	__drm_atomic_helper_plane_destroy_state(state);
+	kfree(state);
+}
+
+static bool tegra_plane_format_mod_supported(struct drm_plane *plane,
+					     uint32_t format,
+					     uint64_t modifier)
+{
+	const struct drm_format_info *info = drm_format_info(format);
+
+	if (modifier == DRM_FORMAT_MOD_LINEAR)
+		return true;
+
+	if (info->num_planes == 1)
+		return true;
+
+	return false;
+}
+
+const struct drm_plane_funcs tegra_plane_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
+	.destroy = tegra_plane_destroy,
+	.reset = tegra_plane_reset,
+	.atomic_duplicate_state = tegra_plane_atomic_duplicate_state,
+	.atomic_destroy_state = tegra_plane_atomic_destroy_state,
+	.format_mod_supported = tegra_plane_format_mod_supported,
+};
+
+int tegra_plane_state_add(struct tegra_plane *plane,
+			  struct drm_plane_state *state)
+{
+	struct drm_crtc_state *crtc_state;
+	struct tegra_dc_state *tegra;
+	int err;
+
+	/* Propagate errors from allocation or locking failures. */
+	crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
+	if (IS_ERR(crtc_state))
+		return PTR_ERR(crtc_state);
+
+	/* Check plane state for visibility and calculate clipping bounds */
+	err = drm_atomic_helper_check_plane_state(state, crtc_state,
+						  0, INT_MAX, true, true);
+	if (err < 0)
+		return err;
+
+	tegra = to_dc_state(crtc_state);
+
+	tegra->planes |= WIN_A_ACT_REQ << plane->index;
+
+	return 0;
+}
+
+int tegra_plane_format(u32 fourcc, u32 *format, u32 *swap)
+{
+	/* assume no swapping of fetched data */
+	if (swap)
+		*swap = BYTE_SWAP_NOSWAP;
+
+	switch (fourcc) {
+	case DRM_FORMAT_ARGB4444:
+		*format = WIN_COLOR_DEPTH_B4G4R4A4;
+		break;
+
+	case DRM_FORMAT_ARGB1555:
+		*format = WIN_COLOR_DEPTH_B5G5R5A1;
+		break;
+
+	case DRM_FORMAT_RGB565:
+		*format = WIN_COLOR_DEPTH_B5G6R5;
+		break;
+
+	case DRM_FORMAT_RGBA5551:
+		*format = WIN_COLOR_DEPTH_A1B5G5R5;
+		break;
+
+	case DRM_FORMAT_ARGB8888:
+		*format = WIN_COLOR_DEPTH_B8G8R8A8;
+		break;
+
+	case DRM_FORMAT_ABGR8888:
+		*format = WIN_COLOR_DEPTH_R8G8B8A8;
+		break;
+
+	case DRM_FORMAT_ABGR4444:
+		*format = WIN_COLOR_DEPTH_R4G4B4A4;
+		break;
+
+	case DRM_FORMAT_ABGR1555:
+		*format = WIN_COLOR_DEPTH_R5G5B5A;
+		break;
+
+	case DRM_FORMAT_BGRA5551:
+		*format = WIN_COLOR_DEPTH_AR5G5B5;
+		break;
+
+	case DRM_FORMAT_XRGB1555:
+		*format = WIN_COLOR_DEPTH_B5G5R5X1;
+		break;
+
+	case DRM_FORMAT_RGBX5551:
+		*format = WIN_COLOR_DEPTH_X1B5G5R5;
+		break;
+
+	case DRM_FORMAT_XBGR1555:
+		*format = WIN_COLOR_DEPTH_R5G5B5X1;
+		break;
+
+	case DRM_FORMAT_BGRX5551:
+		*format = WIN_COLOR_DEPTH_X1R5G5B5;
+		break;
+
+	case DRM_FORMAT_BGR565:
+		*format = WIN_COLOR_DEPTH_R5G6B5;
+		break;
+
+	case DRM_FORMAT_BGRA8888:
+		*format = WIN_COLOR_DEPTH_A8R8G8B8;
+		break;
+
+	case DRM_FORMAT_RGBA8888:
+		*format = WIN_COLOR_DEPTH_A8B8G8R8;
+		break;
+
+	case DRM_FORMAT_XRGB8888:
+		*format = WIN_COLOR_DEPTH_B8G8R8X8;
+		break;
+
+	case DRM_FORMAT_XBGR8888:
+		*format = WIN_COLOR_DEPTH_R8G8B8X8;
+		break;
+
+	case DRM_FORMAT_UYVY:
+		*format = WIN_COLOR_DEPTH_YCbCr422;
+		break;
+
+	case DRM_FORMAT_YUYV:
+		if (!swap)
+			return -EINVAL;
+
+		*format = WIN_COLOR_DEPTH_YCbCr422;
+		*swap = BYTE_SWAP_SWAP2;
+		break;
+
+	case DRM_FORMAT_YUV420:
+		*format = WIN_COLOR_DEPTH_YCbCr420P;
+		break;
+
+	case DRM_FORMAT_YUV422:
+		*format = WIN_COLOR_DEPTH_YCbCr422P;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+bool tegra_plane_format_is_yuv(unsigned int format, bool *planar)
+{
+	switch (format) {
+	case WIN_COLOR_DEPTH_YCbCr422:
+	case WIN_COLOR_DEPTH_YUV422:
+		if (planar)
+			*planar = false;
+
+		return true;
+
+	case WIN_COLOR_DEPTH_YCbCr420P:
+	case WIN_COLOR_DEPTH_YUV420P:
+	case WIN_COLOR_DEPTH_YCbCr422P:
+	case WIN_COLOR_DEPTH_YUV422P:
+	case WIN_COLOR_DEPTH_YCbCr422R:
+	case WIN_COLOR_DEPTH_YUV422R:
+	case WIN_COLOR_DEPTH_YCbCr422RA:
+	case WIN_COLOR_DEPTH_YUV422RA:
+		if (planar)
+			*planar = true;
+
+		return true;
+	}
+
+	if (planar)
+		*planar = false;
+
+	return false;
+}
+
+static bool __drm_format_has_alpha(u32 format)
+{
+	switch (format) {
+	case DRM_FORMAT_ARGB1555:
+	case DRM_FORMAT_RGBA5551:
+	case DRM_FORMAT_ABGR8888:
+	case DRM_FORMAT_ARGB8888:
+		return true;
+	}
+
+	return false;
+}
+
+static int tegra_plane_format_get_alpha(unsigned int opaque,
+					unsigned int *alpha)
+{
+	if (tegra_plane_format_is_yuv(opaque, NULL)) {
+		*alpha = opaque;
+		return 0;
+	}
+
+	switch (opaque) {
+	case WIN_COLOR_DEPTH_B5G5R5X1:
+		*alpha = WIN_COLOR_DEPTH_B5G5R5A1;
+		return 0;
+
+	case WIN_COLOR_DEPTH_X1B5G5R5:
+		*alpha = WIN_COLOR_DEPTH_A1B5G5R5;
+		return 0;
+
+	case WIN_COLOR_DEPTH_R8G8B8X8:
+		*alpha = WIN_COLOR_DEPTH_R8G8B8A8;
+		return 0;
+
+	case WIN_COLOR_DEPTH_B8G8R8X8:
+		*alpha = WIN_COLOR_DEPTH_B8G8R8A8;
+		return 0;
+
+	case WIN_COLOR_DEPTH_B5G6R5:
+		*alpha = opaque;
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+/*
+ * This is applicable to Tegra20 and Tegra30 only where the opaque formats can
+ * be emulated using the alpha formats and alpha blending disabled.
+ */
+static int tegra_plane_setup_opacity(struct tegra_plane *tegra,
+				     struct tegra_plane_state *state)
+{
+	unsigned int format;
+	int err;
+
+	switch (state->format) {
+	case WIN_COLOR_DEPTH_B5G5R5A1:
+	case WIN_COLOR_DEPTH_A1B5G5R5:
+	case WIN_COLOR_DEPTH_R8G8B8A8:
+	case WIN_COLOR_DEPTH_B8G8R8A8:
+		state->opaque = false;
+		break;
+
+	default:
+		err = tegra_plane_format_get_alpha(state->format, &format);
+		if (err < 0)
+			return err;
+
+		state->format = format;
+		state->opaque = true;
+		break;
+	}
+
+	return 0;
+}
+
+static int tegra_plane_check_transparency(struct tegra_plane *tegra,
+					  struct tegra_plane_state *state)
+{
+	struct drm_plane_state *old, *plane_state;
+	struct drm_plane *plane;
+
+	old = drm_atomic_get_old_plane_state(state->base.state, &tegra->base);
+
+	/* check if zpos / transparency changed */
+	if (old->normalized_zpos == state->base.normalized_zpos &&
+	    to_tegra_plane_state(old)->opaque == state->opaque)
+		return 0;
+
+	/* include all sibling planes into this commit */
+	drm_for_each_plane(plane, tegra->base.dev) {
+		struct tegra_plane *p = to_tegra_plane(plane);
+
+		/* skip this plane and planes on different CRTCs */
+		if (p == tegra || p->dc != tegra->dc)
+			continue;
+
+		plane_state = drm_atomic_get_plane_state(state->base.state,
+							 plane);
+		if (IS_ERR(plane_state))
+			return PTR_ERR(plane_state);
+	}
+
+	return 1;
+}
+
+static unsigned int tegra_plane_get_overlap_index(struct tegra_plane *plane,
+						  struct tegra_plane *other)
+{
+	unsigned int index = 0, i;
+
+	WARN_ON(plane == other);
+
+	for (i = 0; i < 3; i++) {
+		if (i == plane->index)
+			continue;
+
+		if (i == other->index)
+			break;
+
+		index++;
+	}
+
+	return index;
+}
+
+static void tegra_plane_update_transparency(struct tegra_plane *tegra,
+					    struct tegra_plane_state *state)
+{
+	struct drm_plane_state *new;
+	struct drm_plane *plane;
+	unsigned int i;
+
+	for_each_new_plane_in_state(state->base.state, plane, new, i) {
+		struct tegra_plane *p = to_tegra_plane(plane);
+		unsigned index;
+
+		/* skip this plane and planes on different CRTCs */
+		if (p == tegra || p->dc != tegra->dc)
+			continue;
+
+		index = tegra_plane_get_overlap_index(tegra, p);
+
+		if (new->fb && __drm_format_has_alpha(new->fb->format->format))
+			state->blending[index].alpha = true;
+		else
+			state->blending[index].alpha = false;
+
+		if (new->normalized_zpos > state->base.normalized_zpos)
+			state->blending[index].top = true;
+		else
+			state->blending[index].top = false;
+
+		/*
+		 * Missing framebuffer means that plane is disabled, in this
+		 * case mark B / C window as top to be able to differentiate
+		 * windows indices order in regards to zPos for the middle
+		 * window X / Y registers programming.
+		 */
+		if (!new->fb)
+			state->blending[index].top = (index == 1);
+	}
+}
+
+static int tegra_plane_setup_transparency(struct tegra_plane *tegra,
+					  struct tegra_plane_state *state)
+{
+	struct tegra_plane_state *tegra_state;
+	struct drm_plane_state *new;
+	struct drm_plane *plane;
+	int err;
+
+	/*
+	 * If planes zpos / transparency changed, sibling planes blending
+	 * state may require adjustment and in this case they will be included
+	 * into this atom commit, otherwise blending state is unchanged.
+	 */
+	err = tegra_plane_check_transparency(tegra, state);
+	if (err <= 0)
+		return err;
+
+	/*
+	 * All planes are now in the atomic state, walk them up and update
+	 * transparency state for each plane.
+	 */
+	drm_for_each_plane(plane, tegra->base.dev) {
+		struct tegra_plane *p = to_tegra_plane(plane);
+
+		/* skip planes on different CRTCs */
+		if (p->dc != tegra->dc)
+			continue;
+
+		new = drm_atomic_get_new_plane_state(state->base.state, plane);
+		tegra_state = to_tegra_plane_state(new);
+
+		/*
+		 * There is no need to update blending state for the disabled
+		 * plane.
+		 */
+		if (new->fb)
+			tegra_plane_update_transparency(p, tegra_state);
+	}
+
+	return 0;
+}
+
+int tegra_plane_setup_legacy_state(struct tegra_plane *tegra,
+				   struct tegra_plane_state *state)
+{
+	int err;
+
+	err = tegra_plane_setup_opacity(tegra, state);
+	if (err < 0)
+		return err;
+
+	err = tegra_plane_setup_transparency(tegra, state);
+	if (err < 0)
+		return err;
+
+	return 0;
+}