This commit introduces plane functions and helper functions
for the VS DRM subsystem, enhancing support for managing
display planes and their configurations.
Signed-off-by: keith zhao <keith.z...@starfivetech.com>
---
drivers/gpu/drm/verisilicon/Makefile | 3 +-
drivers/gpu/drm/verisilicon/vs_plane.c | 358 +++++++++++++++++++++++++
drivers/gpu/drm/verisilicon/vs_plane.h | 27 ++
3 files changed, 387 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/verisilicon/vs_plane.c
create mode 100644 drivers/gpu/drm/verisilicon/vs_plane.h
diff --git a/drivers/gpu/drm/verisilicon/Makefile
b/drivers/gpu/drm/verisilicon/Makefile
index 37f6a4db2a12..1a0e46f38ae8 100644
--- a/drivers/gpu/drm/verisilicon/Makefile
+++ b/drivers/gpu/drm/verisilicon/Makefile
@@ -2,6 +2,7 @@
vs_drm-objs := vs_dc_hw.o \
vs_modeset.o \
- vs_crtc.o
+ vs_crtc.o \
+ vs_plane.o
obj-$(CONFIG_DRM_VERISILICON_DC8200) += vs_drm.o
diff --git a/drivers/gpu/drm/verisilicon/vs_plane.c
b/drivers/gpu/drm/verisilicon/vs_plane.c
new file mode 100644
index 000000000000..ba47d0185fc6
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/vs_plane.c
@@ -0,0 +1,358 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) VeriSilicon Holdings Co., Ltd.
+ */
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_blend.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_fb_dma_helper.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_plane_helper.h>
+
+#include "vs_plane.h"
+#include "vs_drv.h"
+#include "vs_crtc.h"
+
+static inline struct vs_plane_state *
+to_vs_plane_state(struct drm_plane_state *state)
+{
+ return container_of(state, struct vs_plane_state, base);
+}
+
+static inline struct vs_plane *to_vs_plane(struct drm_plane *plane)
+{
+ return container_of(plane, struct vs_plane, base);
+}
+
+static void vs_plane_atomic_destroy_state(struct drm_plane *plane,
+ struct drm_plane_state *state)
+{
+ struct vs_plane_state *vs_plane_state = to_vs_plane_state(state);
+
+ __drm_atomic_helper_plane_destroy_state(state);
+ kfree(vs_plane_state);
+}
+
+static void vs_plane_reset(struct drm_plane *plane)
+{
+ struct vs_plane_state *state;
+
+ if (plane->state)
+ vs_plane_atomic_destroy_state(plane, plane->state);
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return;
+
+ __drm_atomic_helper_plane_reset(plane, &state->base);
+}
+
+static struct drm_plane_state *
+vs_plane_atomic_duplicate_state(struct drm_plane *plane)
+{
+ struct vs_plane_state *state;
+
+ if (WARN_ON(!plane->state))
+ return NULL;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return NULL;
+
+ __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
+
+ return &state->base;
+}
+
+static bool vs_format_mod_supported(struct drm_plane *plane,
+ u32 format,
+ u64 modifier)
+{
+ int i;
+
+ /* We always have to allow these modifiers:
+ * 1. Core DRM checks for LINEAR support if userspace does not provide
modifiers.
+ * 2. Not passing any modifiers is the same as explicitly passing
INVALID.
+ */
+ if (modifier == DRM_FORMAT_MOD_LINEAR)
+ return true;
+
+ /* Check that the modifier is on the list of the plane's supported
modifiers. */
+ for (i = 0; i < plane->modifier_count; i++) {
+ if (modifier == plane->modifiers[i])
+ break;
+ }
+
+ if (i == plane->modifier_count)
+ return false;
+
+ return true;
+}
+
+static const struct drm_plane_funcs vs_plane_funcs = {
+ .update_plane = drm_atomic_helper_update_plane,
+ .disable_plane = drm_atomic_helper_disable_plane,
+ .reset = vs_plane_reset,
+ .atomic_duplicate_state = vs_plane_atomic_duplicate_state,
+ .atomic_destroy_state = vs_plane_atomic_destroy_state,
+ .format_mod_supported = vs_format_mod_supported,
+};
+
+static unsigned char vs_get_plane_number(struct drm_framebuffer *fb)
+{
+ const struct drm_format_info *info;
+
+ if (!fb)
+ return 0;
+
+ info = drm_format_info(fb->format->format);
+ if (!info || info->num_planes > DRM_FORMAT_MAX_PLANES)
+ return 0;
+
+ return info->num_planes;
+}
+
+static bool vs_dc_mod_supported(const struct vs_plane_info *vs_info, u64
modifier)
+{
+ const u64 *mods;
+
+ if (vs_info->type == DRM_PLANE_TYPE_CURSOR)
+ return 0;
+
+ if (!vs_info->data->modifiers)
+ return false;
+
+ for (mods = vs_info->data->modifiers; *mods != DRM_FORMAT_MOD_INVALID;
mods++) {
+ if (*mods == modifier)
+ return true;
+ }
+
+ return false;
+}
+
+static int vs_common_plane_atomic_check(struct drm_plane *plane, struct
drm_atomic_state *state)
+{
+ struct drm_plane_state *new_state =
drm_atomic_get_new_plane_state(state, plane);
+ struct vs_drm_device *priv = to_vs_drm_private(plane->dev);
+ struct vs_dc *dc = &priv->dc;
+ struct drm_framebuffer *fb = new_state->fb;
+ const struct vs_plane_info *plane_info;
+ struct drm_crtc_state *crtc_state;
+
+ if (!new_state->crtc || !new_state->fb)
+ return 0;
+
+ plane_info = (struct vs_plane_info
*)&dc->hw.info->info[to_vs_plane(plane)->id];
+
+ if (fb->width < plane_info->data->min_width ||
+ fb->width > plane_info->data->max_width ||
+ fb->height < plane_info->data->min_height ||
+ fb->height > plane_info->data->max_height)
+ drm_err_once(plane->dev, "buffer size may not support on
plane%d.\n",
+ to_vs_plane(plane)->id);
+
+ if (!vs_dc_mod_supported(plane_info, fb->modifier)) {
+ drm_err(plane->dev, "unsupported modifier on plane%d.\n",
to_vs_plane(plane)->id);
+ return -EINVAL;
+ }
+
+ crtc_state = drm_atomic_get_existing_crtc_state(new_state->state,
new_state->crtc);
+ return drm_atomic_helper_check_plane_state(new_state, crtc_state,
+ plane_info->data->min_scale,
+ plane_info->data->max_scale,
+ true, true);
+}
+
+static void vs_plane_atomic_update(struct drm_plane *plane, struct
drm_atomic_state *state)
+{
+ struct drm_plane_state *new_state =
drm_atomic_get_new_plane_state(state, plane);
+ struct drm_plane_state *old_state =
drm_atomic_get_old_plane_state(state, plane);
+
+ unsigned char i, num_planes, display_id, id;
+ u32 format;
+ bool is_yuv;
+ struct vs_plane *vs_plane = to_vs_plane(plane);
+ struct vs_plane_state *plane_state = to_vs_plane_state(new_state);
+ struct vs_drm_device *priv = to_vs_drm_private(plane->dev);
+ struct vs_dc *dc = &priv->dc;
+
+ if (!new_state->fb || !new_state->crtc)
+ return;
+
+ drm_fb_dma_sync_non_coherent(plane->dev, old_state, new_state);
+
+ num_planes = vs_get_plane_number(new_state->fb);
+
+ for (i = 0; i < num_planes; i++) {
+ dma_addr_t dma_addr;
+
+ dma_addr = drm_fb_dma_get_gem_addr(new_state->fb, new_state, i);
+ plane_state->dma_addr[i] = dma_addr;
+ }
+
+ display_id = to_vs_display_id(new_state->crtc);
+ format = new_state->fb->format->format;
+ is_yuv = new_state->fb->format->is_yuv;
+ id = vs_plane->id;
+
+ dc_plane_hw_update_format_colorspace(dc, format,
new_state->color_encoding, id, is_yuv);
+ if (new_state->visible)
+ dc_plane_hw_update_address(dc, id, format,
plane_state->dma_addr,
+ new_state->fb, &new_state->src);
+ dc_plane_hw_update_format(dc, format, new_state->color_encoding,
new_state->rotation,
+ new_state->visible, new_state->zpos, id,
display_id);
+ dc_plane_hw_update_scale(dc, &new_state->src, &new_state->dst, id,
+ display_id, new_state->rotation);
+ dc_plane_hw_update_blend(dc, new_state->alpha,
new_state->pixel_blend_mode,
+ id, display_id);
+}
+
+static void vs_cursor_plane_atomic_update(struct drm_plane *plane, struct
drm_atomic_state *state)
+{
+ struct drm_plane_state *new_state =
drm_atomic_get_new_plane_state(state,
+
plane);
+ struct drm_plane_state *old_state =
drm_atomic_get_old_plane_state(state,
+
plane);
+ struct vs_drm_device *priv = to_vs_drm_private(plane->dev);
+ struct vs_dc *dc = &priv->dc;
+ unsigned char display_id;
+ u32 crtc_w, crtc_x, crtc_y;
+ s32 hotspot_x, hotspot_y;
+ dma_addr_t dma_addr;
+
+ display_id = to_vs_display_id(new_state->crtc);
+
+ if (!new_state->fb || !new_state->crtc)
+ return;
+
+ drm_fb_dma_sync_non_coherent(new_state->fb->dev, old_state, new_state);
+ dma_addr = drm_fb_dma_get_gem_addr(new_state->fb, new_state, 0);
+ crtc_w = new_state->crtc_w;
+
+ if (new_state->crtc_x > 0) {
+ crtc_x = new_state->crtc_x;
+ hotspot_x = 0;
+ } else {
+ hotspot_x = -new_state->crtc_x;
+ crtc_x = 0;
+ }
+ if (new_state->crtc_y > 0) {
+ crtc_y = new_state->crtc_y;
+ hotspot_y = 0;
+ } else {
+ hotspot_y = -new_state->crtc_y;
+ crtc_y = 0;
+ }
+ dc_hw_update_cursor(&dc->hw, display_id, dma_addr, crtc_w, crtc_x,
+ crtc_y, hotspot_x, hotspot_y);
+}
+
+static void vs_plane_atomic_disable(struct drm_plane *plane, struct
drm_atomic_state *state)
+{
+ struct vs_plane *vs_plane = to_vs_plane(plane);
+ struct vs_drm_device *priv = to_vs_drm_private(plane->dev);
+ struct vs_dc *dc = &priv->dc;
+
+ dc_hw_disable_plane(dc, vs_plane->id);
+}
+
+static void vs_cursor_plane_atomic_disable(struct drm_plane *plane, struct
drm_atomic_state *state)
+{
+ struct drm_plane_state *old_state =
drm_atomic_get_old_plane_state(state, plane);
+ struct vs_drm_device *priv = to_vs_drm_private(plane->dev);
+ struct vs_dc *dc = &priv->dc;
+ unsigned char display_id;
+
+ display_id = to_vs_display_id(old_state->crtc);
+ dc_hw_disable_cursor(&dc->hw, display_id);
+}
+
+static const struct drm_plane_helper_funcs vs_primary_plane_helpers = {
+ .atomic_check = vs_common_plane_atomic_check,
+ .atomic_update = vs_plane_atomic_update,
+ .atomic_disable = vs_plane_atomic_disable,
+};
+
+static const struct drm_plane_helper_funcs vs_overlay_plane_helpers = {
+ .atomic_check = vs_common_plane_atomic_check,
+ .atomic_update = vs_plane_atomic_update,
+ .atomic_disable = vs_plane_atomic_disable,
+};
+
+static const struct drm_plane_helper_funcs vs_cursor_plane_helpers = {
+ .atomic_check = vs_common_plane_atomic_check,
+ .atomic_update = vs_cursor_plane_atomic_update,
+ .atomic_disable = vs_cursor_plane_atomic_disable,
+};
+
+struct vs_plane *vs_plane_create(struct drm_device *drm_dev,
+ struct vs_plane_info *info,
+ unsigned int layer_num,
+ unsigned int possible_crtcs)
+{
+ struct vs_plane *plane;
+ const struct vs_plane_data *data = info->data;
+ int ret;
+
+ if (!info)
+ return NULL;
+
+ plane = drmm_universal_plane_alloc(drm_dev, struct vs_plane, base,
+ possible_crtcs,
+ &vs_plane_funcs,
+ data->formats, data->num_formats,
+ data->modifiers, info->type,
+ NULL);
+ if (IS_ERR(plane))
+ return ERR_CAST(plane);
+
+ if (info->type == DRM_PLANE_TYPE_PRIMARY)
+ drm_plane_helper_add(&plane->base, &vs_primary_plane_helpers);
+ else if (info->type == DRM_PLANE_TYPE_OVERLAY)
+ drm_plane_helper_add(&plane->base, &vs_overlay_plane_helpers);
+ else
+ drm_plane_helper_add(&plane->base, &vs_cursor_plane_helpers);
+
+ if (data->blend_mode) {
+ ret = drm_plane_create_alpha_property(&plane->base);
+ if (ret)
+ return NULL;
+
+ ret = drm_plane_create_blend_mode_property(&plane->base,
+
BIT(DRM_MODE_BLEND_PIXEL_NONE) |
+
BIT(DRM_MODE_BLEND_PREMULTI) |
+
BIT(DRM_MODE_BLEND_COVERAGE));
+ if (ret)
+ return NULL;
+ }
+
+ if (data->color_encoding) {
+ ret = drm_plane_create_color_properties(&plane->base,
data->color_encoding,
+
BIT(DRM_COLOR_YCBCR_LIMITED_RANGE),
+ DRM_COLOR_YCBCR_BT709,
+
DRM_COLOR_YCBCR_LIMITED_RANGE);
+ if (ret)
+ return NULL;
+ }
+
+ if (data->rotation) {
+ ret = drm_plane_create_rotation_property(&plane->base,
+ DRM_MODE_ROTATE_0,
+ data->rotation);
+ if (ret)
+ return NULL;
+ }
+
+ if (data->zpos != 255) {
+ ret = drm_plane_create_zpos_property(&plane->base, data->zpos,
0, layer_num - 1);
+ if (ret)
+ return NULL;
+ } else {
+ ret = drm_plane_create_zpos_immutable_property(&plane->base,
data->zpos);
+ if (ret)
+ return NULL;
+ }
+
+ return plane;
+}
diff --git a/drivers/gpu/drm/verisilicon/vs_plane.h
b/drivers/gpu/drm/verisilicon/vs_plane.h
new file mode 100644
index 000000000000..60d45b69e30a
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/vs_plane.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) VeriSilicon Holdings Co., Ltd.
+ */
+
+#ifndef __VS_PLANE_H__
+#define __VS_PLANE_H__
+
+#include <drm/drm_plane.h>
+
+struct vs_plane_info;
+
+struct vs_plane_state {
+ struct drm_plane_state base;
+ dma_addr_t dma_addr[DRM_FORMAT_MAX_PLANES];
+};
+
+struct vs_plane {
+ struct drm_plane base;
+ u8 id;
+};
+
+struct vs_plane *vs_plane_create(struct drm_device *drm_dev,
+ struct vs_plane_info *info,
+ unsigned int layer_num,
+ unsigned int possible_crtcs);
+#endif /* __VS_PLANE_H__ */
--
2.34.1
