[PATCH 6/9] drm/verisilicon: Add drm crtc funcs
Keith Zhao
keith.zhao at starfivetech.com
Fri Jun 2 00:40:40 PDT 2023
Add crtc driver which implements crtc related operation functions.
Signed-off-by: Keith Zhao <keith.zhao at starfivetech.com>
---
drivers/gpu/drm/verisilicon/Makefile | 1 +
drivers/gpu/drm/verisilicon/vs_crtc.c | 388 ++++++++++++++++++++++++++
drivers/gpu/drm/verisilicon/vs_crtc.h | 74 +++++
drivers/gpu/drm/verisilicon/vs_type.h | 72 +++++
4 files changed, 535 insertions(+)
create mode 100644 drivers/gpu/drm/verisilicon/vs_crtc.c
create mode 100644 drivers/gpu/drm/verisilicon/vs_crtc.h
create mode 100644 drivers/gpu/drm/verisilicon/vs_type.h
diff --git a/drivers/gpu/drm/verisilicon/Makefile b/drivers/gpu/drm/verisilicon/Makefile
index 38254dc5d98d..bae5fbab9bbb 100644
--- a/drivers/gpu/drm/verisilicon/Makefile
+++ b/drivers/gpu/drm/verisilicon/Makefile
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
vs_drm-objs := vs_drv.o \
+ vs_crtc.o \
vs_fb.o \
vs_gem.o
diff --git a/drivers/gpu/drm/verisilicon/vs_crtc.c b/drivers/gpu/drm/verisilicon/vs_crtc.c
new file mode 100644
index 000000000000..a9e742d7bd1a
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/vs_crtc.c
@@ -0,0 +1,388 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/debugfs.h>
+#include <linux/media-bus-format.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_gem_atomic_helper.h>
+#include <drm/drm_vblank.h>
+#include <drm/vs_drm.h>
+
+#include "vs_crtc.h"
+
+void vs_crtc_destroy(struct drm_crtc *crtc)
+{
+ struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
+
+ drm_crtc_cleanup(crtc);
+ kfree(vs_crtc);
+}
+
+static void vs_crtc_reset(struct drm_crtc *crtc)
+{
+ struct vs_crtc_state *state;
+
+ if (crtc->state) {
+ __drm_atomic_helper_crtc_destroy_state(crtc->state);
+
+ state = to_vs_crtc_state(crtc->state);
+ kfree(state);
+ crtc->state = NULL;
+ }
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return;
+
+ __drm_atomic_helper_crtc_reset(crtc, &state->base);
+
+ state->sync_mode = VS_SINGLE_DC;
+ state->output_fmt = MEDIA_BUS_FMT_RBG888_1X24;
+ state->encoder_type = DRM_MODE_ENCODER_NONE;
+}
+
+static struct drm_crtc_state *
+vs_crtc_atomic_duplicate_state(struct drm_crtc *crtc)
+{
+ struct vs_crtc_state *ori_state;
+ struct vs_crtc_state *state;
+
+ if (WARN_ON(!crtc->state))
+ return NULL;
+
+ ori_state = to_vs_crtc_state(crtc->state);
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return NULL;
+
+ __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);
+
+ state->sync_mode = ori_state->sync_mode;
+ state->output_fmt = ori_state->output_fmt;
+ state->encoder_type = ori_state->encoder_type;
+ state->bg_color = ori_state->bg_color;
+ state->bpp = ori_state->bpp;
+ state->sync_enable = ori_state->sync_enable;
+ state->dither_enable = ori_state->dither_enable;
+ state->underflow = ori_state->underflow;
+
+ return &state->base;
+}
+
+static void vs_crtc_atomic_destroy_state(struct drm_crtc *crtc,
+ struct drm_crtc_state *state)
+{
+ __drm_atomic_helper_crtc_destroy_state(state);
+ kfree(to_vs_crtc_state(state));
+}
+
+static int vs_crtc_atomic_set_property(struct drm_crtc *crtc,
+ struct drm_crtc_state *state,
+ struct drm_property *property,
+ uint64_t val)
+{
+ struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
+ struct vs_crtc_state *vs_crtc_state = to_vs_crtc_state(state);
+
+ if (property == vs_crtc->sync_mode)
+ vs_crtc_state->sync_mode = val;
+ else if (property == vs_crtc->mmu_prefetch)
+ vs_crtc_state->mmu_prefetch = val;
+ else if (property == vs_crtc->bg_color)
+ vs_crtc_state->bg_color = val;
+ else if (property == vs_crtc->panel_sync)
+ vs_crtc_state->sync_enable = val;
+ else if (property == vs_crtc->dither)
+ vs_crtc_state->dither_enable = val;
+ else
+ return -EINVAL;
+
+ return 0;
+}
+
+static int vs_crtc_atomic_get_property(struct drm_crtc *crtc,
+ const struct drm_crtc_state *state,
+ struct drm_property *property,
+ uint64_t *val)
+{
+ struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
+ const struct vs_crtc_state *vs_crtc_state =
+ container_of(state, const struct vs_crtc_state, base);
+
+ if (property == vs_crtc->sync_mode)
+ *val = vs_crtc_state->sync_mode;
+ else if (property == vs_crtc->mmu_prefetch)
+ *val = vs_crtc_state->mmu_prefetch;
+ else if (property == vs_crtc->bg_color)
+ *val = vs_crtc_state->bg_color;
+ else if (property == vs_crtc->panel_sync)
+ *val = vs_crtc_state->sync_enable;
+ else if (property == vs_crtc->dither)
+ *val = vs_crtc_state->dither_enable;
+ else
+ return -EINVAL;
+
+ return 0;
+}
+
+static int vs_crtc_late_register(struct drm_crtc *crtc)
+{
+ return 0;
+}
+
+static int vs_crtc_enable_vblank(struct drm_crtc *crtc)
+{
+ struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
+
+ vs_crtc->funcs->enable_vblank(vs_crtc->dev, true);
+
+ return 0;
+}
+
+static void vs_crtc_disable_vblank(struct drm_crtc *crtc)
+{
+ struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
+
+ vs_crtc->funcs->enable_vblank(vs_crtc->dev, false);
+}
+
+static const struct drm_crtc_funcs vs_crtc_funcs = {
+ .set_config = drm_atomic_helper_set_config,
+ .destroy = vs_crtc_destroy,
+ .page_flip = drm_atomic_helper_page_flip,
+ .reset = vs_crtc_reset,
+ .atomic_duplicate_state = vs_crtc_atomic_duplicate_state,
+ .atomic_destroy_state = vs_crtc_atomic_destroy_state,
+ .atomic_set_property = vs_crtc_atomic_set_property,
+ .atomic_get_property = vs_crtc_atomic_get_property,
+ .late_register = vs_crtc_late_register,
+ .enable_vblank = vs_crtc_enable_vblank,
+ .disable_vblank = vs_crtc_disable_vblank,
+};
+
+static u8 cal_pixel_bits(u32 bus_format)
+{
+ u8 bpp;
+
+ switch (bus_format) {
+ case MEDIA_BUS_FMT_RGB565_1X16:
+ case MEDIA_BUS_FMT_UYVY8_1X16:
+ bpp = 16;
+ break;
+ case MEDIA_BUS_FMT_RGB666_1X18:
+ case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
+ bpp = 18;
+ break;
+ case MEDIA_BUS_FMT_UYVY10_1X20:
+ bpp = 20;
+ break;
+ case MEDIA_BUS_FMT_BGR888_1X24:
+ case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
+ case MEDIA_BUS_FMT_YUV8_1X24:
+ bpp = 24;
+ break;
+ case MEDIA_BUS_FMT_RGB101010_1X30:
+ case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
+ case MEDIA_BUS_FMT_YUV10_1X30:
+ bpp = 30;
+ break;
+ default:
+ bpp = 24;
+ break;
+ }
+
+ return bpp;
+}
+
+static bool vs_crtc_mode_fixup(struct drm_crtc *crtc,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
+
+ return vs_crtc->funcs->mode_fixup(vs_crtc->dev, mode, adjusted_mode);
+}
+
+static void vs_crtc_atomic_enable(struct drm_crtc *crtc,
+ struct drm_atomic_state *state)
+{
+ struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
+ struct vs_crtc_state *vs_crtc_state = to_vs_crtc_state(crtc->state);
+
+ vs_crtc_state->bpp = cal_pixel_bits(vs_crtc_state->output_fmt);
+
+ vs_crtc->funcs->enable(vs_crtc->dev, crtc);
+ drm_crtc_vblank_on(crtc);
+}
+
+static void vs_crtc_atomic_disable(struct drm_crtc *crtc,
+ struct drm_atomic_state *state)
+{
+ struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
+
+ drm_crtc_vblank_off(crtc);
+
+ vs_crtc->funcs->disable(vs_crtc->dev, crtc);
+
+ if (crtc->state->event && !crtc->state->active) {
+ spin_lock_irq(&crtc->dev->event_lock);
+ drm_crtc_send_vblank_event(crtc, crtc->state->event);
+ spin_unlock_irq(&crtc->dev->event_lock);
+
+ crtc->state->event = NULL;
+ }
+}
+
+static void vs_crtc_atomic_begin(struct drm_crtc *crtc,
+ struct drm_atomic_state *state)
+{
+ struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
+ crtc);
+
+ struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
+ struct device *dev = vs_crtc->dev;
+ struct drm_property_blob *blob = crtc->state->gamma_lut;
+ struct drm_color_lut *lut;
+
+ if (crtc_state->color_mgmt_changed) {
+ if (blob && blob->length) {
+ lut = blob->data;
+ vs_crtc->funcs->set_gamma(dev, crtc, lut,
+ blob->length / sizeof(*lut));
+ vs_crtc->funcs->enable_gamma(dev, crtc, true);
+ } else {
+ vs_crtc->funcs->enable_gamma(dev, crtc, false);
+ }
+ }
+}
+
+static void vs_crtc_atomic_flush(struct drm_crtc *crtc,
+ struct drm_atomic_state *state)
+{
+ struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
+ struct drm_pending_vblank_event *event = crtc->state->event;
+
+ vs_crtc->funcs->commit(vs_crtc->dev);
+
+ if (event) {
+ WARN_ON(drm_crtc_vblank_get(crtc) != 0);
+
+ spin_lock_irq(&crtc->dev->event_lock);
+ drm_crtc_arm_vblank_event(crtc, event);
+ spin_unlock_irq(&crtc->dev->event_lock);
+ crtc->state->event = NULL;
+ }
+}
+
+static const struct drm_crtc_helper_funcs vs_crtc_helper_funcs = {
+ .mode_fixup = vs_crtc_mode_fixup,
+ .atomic_enable = vs_crtc_atomic_enable,
+ .atomic_disable = vs_crtc_atomic_disable,
+ .atomic_begin = vs_crtc_atomic_begin,
+ .atomic_flush = vs_crtc_atomic_flush,
+};
+
+static const struct drm_prop_enum_list vs_sync_mode_enum_list[] = {
+ { VS_SINGLE_DC, "single dc mode" },
+ { VS_MULTI_DC_PRIMARY, "primary dc for multi dc mode" },
+ { VS_MULTI_DC_SECONDARY, "secondary dc for multi dc mode" },
+};
+
+struct vs_crtc *vs_crtc_create(struct drm_device *drm_dev,
+ struct vs_dc_info *info)
+{
+ struct vs_crtc *crtc;
+ int ret;
+
+ if (!info)
+ return NULL;
+
+ crtc = kzalloc(sizeof(*crtc), GFP_KERNEL);
+ if (!crtc)
+ return NULL;
+
+ ret = drm_crtc_init_with_planes(drm_dev, &crtc->base,
+ NULL, NULL, &vs_crtc_funcs,
+ info->name ? info->name : NULL);
+ if (ret)
+ goto err_free_crtc;
+
+ drm_crtc_helper_add(&crtc->base, &vs_crtc_helper_funcs);
+
+ /* Set up the crtc properties */
+ if (info->pipe_sync) {
+ crtc->sync_mode = drm_property_create_enum(drm_dev, 0,
+ "SYNC_MODE",
+ vs_sync_mode_enum_list,
+ ARRAY_SIZE(vs_sync_mode_enum_list));
+
+ if (!crtc->sync_mode)
+ goto err_cleanup_crts;
+
+ drm_object_attach_property(&crtc->base.base,
+ crtc->sync_mode,
+ VS_SINGLE_DC);
+ }
+
+ if (info->gamma_size) {
+ ret = drm_mode_crtc_set_gamma_size(&crtc->base,
+ info->gamma_size);
+ if (ret)
+ goto err_cleanup_crts;
+
+ drm_crtc_enable_color_mgmt(&crtc->base, 0, false,
+ info->gamma_size);
+ }
+
+ if (info->background) {
+ crtc->bg_color = drm_property_create_range(drm_dev, 0,
+ "BG_COLOR", 0, 0xffffffff);
+
+ if (!crtc->bg_color)
+ goto err_cleanup_crts;
+
+ drm_object_attach_property(&crtc->base.base, crtc->bg_color, 0);
+ }
+
+ if (info->panel_sync) {
+ crtc->panel_sync = drm_property_create_bool(drm_dev, 0, "SYNC_ENABLED");
+
+ if (!crtc->panel_sync)
+ goto err_cleanup_crts;
+
+ drm_object_attach_property(&crtc->base.base, crtc->panel_sync, 0);
+ }
+
+ crtc->dither = drm_property_create_bool(drm_dev, 0, "DITHER_ENABLED");
+ if (!crtc->dither)
+ goto err_cleanup_crts;
+
+ drm_object_attach_property(&crtc->base.base, crtc->dither, 0);
+
+ crtc->max_bpc = info->max_bpc;
+ crtc->color_formats = info->color_formats;
+ return crtc;
+
+err_cleanup_crts:
+ drm_crtc_cleanup(&crtc->base);
+
+err_free_crtc:
+ kfree(crtc);
+ return NULL;
+}
+
+void vs_crtc_handle_vblank(struct drm_crtc *crtc, bool underflow)
+{
+ struct vs_crtc_state *vs_crtc_state = to_vs_crtc_state(crtc->state);
+
+ drm_crtc_handle_vblank(crtc);
+
+ vs_crtc_state->underflow = underflow;
+}
diff --git a/drivers/gpu/drm/verisilicon/vs_crtc.h b/drivers/gpu/drm/verisilicon/vs_crtc.h
new file mode 100644
index 000000000000..33b3b14249ce
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/vs_crtc.h
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
+ */
+
+#ifndef __VS_CRTC_H__
+#define __VS_CRTC_H__
+
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+
+#include "vs_type.h"
+
+struct vs_crtc_funcs {
+ void (*enable)(struct device *dev, struct drm_crtc *crtc);
+ void (*disable)(struct device *dev, struct drm_crtc *crtc);
+ bool (*mode_fixup)(struct device *dev,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode);
+ void (*set_gamma)(struct device *dev, struct drm_crtc *crtc,
+ struct drm_color_lut *lut, unsigned int size);
+ void (*enable_gamma)(struct device *dev, struct drm_crtc *crtc,
+ bool enable);
+ void (*enable_vblank)(struct device *dev, bool enable);
+ void (*commit)(struct device *dev);
+};
+
+struct vs_crtc_state {
+ struct drm_crtc_state base;
+
+ u32 sync_mode;
+ u32 output_fmt;
+ u32 bg_color;
+ u8 encoder_type;
+ u8 mmu_prefetch;
+ u8 bpp;
+ bool sync_enable;
+ bool dither_enable;
+ bool underflow;
+};
+
+struct vs_crtc {
+ struct drm_crtc base;
+ struct device *dev;
+ struct drm_pending_vblank_event *event;
+ unsigned int max_bpc;
+ unsigned int color_formats; /* supported color format */
+
+ struct drm_property *sync_mode;
+ struct drm_property *mmu_prefetch;
+ struct drm_property *bg_color;
+ struct drm_property *panel_sync;
+ struct drm_property *dither;
+
+ const struct vs_crtc_funcs *funcs;
+};
+
+void vs_crtc_destroy(struct drm_crtc *crtc);
+
+struct vs_crtc *vs_crtc_create(struct drm_device *drm_dev,
+ struct vs_dc_info *info);
+void vs_crtc_handle_vblank(struct drm_crtc *crtc, bool underflow);
+
+static inline struct vs_crtc *to_vs_crtc(struct drm_crtc *crtc)
+{
+ return container_of(crtc, struct vs_crtc, base);
+}
+
+static inline struct vs_crtc_state *
+to_vs_crtc_state(struct drm_crtc_state *state)
+{
+ return container_of(state, struct vs_crtc_state, base);
+}
+#endif /* __VS_CRTC_H__ */
diff --git a/drivers/gpu/drm/verisilicon/vs_type.h b/drivers/gpu/drm/verisilicon/vs_type.h
new file mode 100644
index 000000000000..6f8db65a703d
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/vs_type.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
+ */
+
+#ifndef __VS_TYPE_H__
+#define __VS_TYPE_H__
+
+#include <linux/version.h>
+
+#include <drm/drm_plane.h>
+#include <drm/drm_plane_helper.h>
+
+struct vs_plane_info {
+ const char *name;
+ u8 id;
+ enum drm_plane_type type;
+ unsigned int num_formats;
+ const u32 *formats;
+ u8 num_modifiers;
+ const u64 *modifiers;
+ unsigned int min_width;
+ unsigned int min_height;
+ unsigned int max_width;
+ unsigned int max_height;
+ unsigned int rotation;
+ unsigned int blend_mode;
+ unsigned int color_encoding;
+
+ /* 0 means no de-gamma LUT */
+ unsigned int degamma_size;
+
+ int min_scale; /* 16.16 fixed point */
+ int max_scale; /* 16.16 fixed point */
+
+ /* default zorder value,
+ * and 255 means unsupported zorder capability
+ */
+ u8 zpos;
+
+ bool watermark;
+ bool color_mgmt;
+ bool roi;
+};
+
+struct vs_dc_info {
+ const char *name;
+
+ u8 panel_num;
+
+ /* planes */
+ u8 plane_num;
+ const struct vs_plane_info *planes;
+
+ u8 layer_num;
+ unsigned int max_bpc;
+ unsigned int color_formats;
+
+ /* 0 means no gamma LUT */
+ u16 gamma_size;
+ u8 gamma_bits;
+
+ u16 pitch_alignment;
+
+ bool pipe_sync;
+ bool mmu_prefetch;
+ bool background;
+ bool panel_sync;
+ bool cap_dec;
+};
+
+#endif /* __VS_TYPE_H__ */
--
2.34.1
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