diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/gpu/drm/vkms | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/vkms')
-rw-r--r-- | drivers/gpu/drm/vkms/Makefile | 11 | ||||
-rw-r--r-- | drivers/gpu/drm/vkms/vkms_composer.c | 319 | ||||
-rw-r--r-- | drivers/gpu/drm/vkms/vkms_crtc.c | 302 | ||||
-rw-r--r-- | drivers/gpu/drm/vkms/vkms_drv.c | 275 | ||||
-rw-r--r-- | drivers/gpu/drm/vkms/vkms_drv.h | 162 | ||||
-rw-r--r-- | drivers/gpu/drm/vkms/vkms_formats.c | 261 | ||||
-rw-r--r-- | drivers/gpu/drm/vkms/vkms_formats.h | 12 | ||||
-rw-r--r-- | drivers/gpu/drm/vkms/vkms_output.c | 127 | ||||
-rw-r--r-- | drivers/gpu/drm/vkms/vkms_plane.c | 207 | ||||
-rw-r--r-- | drivers/gpu/drm/vkms/vkms_writeback.c | 175 |
10 files changed, 1851 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vkms/Makefile b/drivers/gpu/drm/vkms/Makefile new file mode 100644 index 000000000..1b28a6a32 --- /dev/null +++ b/drivers/gpu/drm/vkms/Makefile @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: GPL-2.0-only +vkms-y := \ + vkms_drv.o \ + vkms_plane.o \ + vkms_output.o \ + vkms_formats.o \ + vkms_crtc.o \ + vkms_composer.o \ + vkms_writeback.o + +obj-$(CONFIG_DRM_VKMS) += vkms.o diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c new file mode 100644 index 000000000..80164e79a --- /dev/null +++ b/drivers/gpu/drm/vkms/vkms_composer.c @@ -0,0 +1,319 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include <linux/crc32.h> + +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_fourcc.h> +#include <drm/drm_gem_framebuffer_helper.h> +#include <drm/drm_vblank.h> +#include <linux/minmax.h> + +#include "vkms_drv.h" + +static u16 pre_mul_blend_channel(u16 src, u16 dst, u16 alpha) +{ + u32 new_color; + + new_color = (src * 0xffff + dst * (0xffff - alpha)); + + return DIV_ROUND_CLOSEST(new_color, 0xffff); +} + +/** + * pre_mul_alpha_blend - alpha blending equation + * @src_frame_info: source framebuffer's metadata + * @stage_buffer: The line with the pixels from src_plane + * @output_buffer: A line buffer that receives all the blends output + * + * Using the information from the `frame_info`, this blends only the + * necessary pixels from the `stage_buffer` to the `output_buffer` + * using premultiplied blend formula. + * + * The current DRM assumption is that pixel color values have been already + * pre-multiplied with the alpha channel values. See more + * drm_plane_create_blend_mode_property(). Also, this formula assumes a + * completely opaque background. + */ +static void pre_mul_alpha_blend(struct vkms_frame_info *frame_info, + struct line_buffer *stage_buffer, + struct line_buffer *output_buffer) +{ + int x_dst = frame_info->dst.x1; + struct pixel_argb_u16 *out = output_buffer->pixels + x_dst; + struct pixel_argb_u16 *in = stage_buffer->pixels; + int x_limit = min_t(size_t, drm_rect_width(&frame_info->dst), + stage_buffer->n_pixels); + + for (int x = 0; x < x_limit; x++) { + out[x].a = (u16)0xffff; + out[x].r = pre_mul_blend_channel(in[x].r, out[x].r, in[x].a); + out[x].g = pre_mul_blend_channel(in[x].g, out[x].g, in[x].a); + out[x].b = pre_mul_blend_channel(in[x].b, out[x].b, in[x].a); + } +} + +static bool check_y_limit(struct vkms_frame_info *frame_info, int y) +{ + if (y >= frame_info->dst.y1 && y < frame_info->dst.y2) + return true; + + return false; +} + +static void fill_background(const struct pixel_argb_u16 *background_color, + struct line_buffer *output_buffer) +{ + for (size_t i = 0; i < output_buffer->n_pixels; i++) + output_buffer->pixels[i] = *background_color; +} + +/** + * @wb_frame_info: The writeback frame buffer metadata + * @crtc_state: The crtc state + * @crc32: The crc output of the final frame + * @output_buffer: A buffer of a row that will receive the result of the blend(s) + * @stage_buffer: The line with the pixels from plane being blend to the output + * + * This function blends the pixels (Using the `pre_mul_alpha_blend`) + * from all planes, calculates the crc32 of the output from the former step, + * and, if necessary, convert and store the output to the writeback buffer. + */ +static void blend(struct vkms_writeback_job *wb, + struct vkms_crtc_state *crtc_state, + u32 *crc32, struct line_buffer *stage_buffer, + struct line_buffer *output_buffer, size_t row_size) +{ + struct vkms_plane_state **plane = crtc_state->active_planes; + u32 n_active_planes = crtc_state->num_active_planes; + + const struct pixel_argb_u16 background_color = { .a = 0xffff }; + + size_t crtc_y_limit = crtc_state->base.crtc->mode.vdisplay; + + for (size_t y = 0; y < crtc_y_limit; y++) { + fill_background(&background_color, output_buffer); + + /* The active planes are composed associatively in z-order. */ + for (size_t i = 0; i < n_active_planes; i++) { + if (!check_y_limit(plane[i]->frame_info, y)) + continue; + + vkms_compose_row(stage_buffer, plane[i], y); + pre_mul_alpha_blend(plane[i]->frame_info, stage_buffer, + output_buffer); + } + + *crc32 = crc32_le(*crc32, (void *)output_buffer->pixels, row_size); + + if (wb) + wb->wb_write(&wb->wb_frame_info, output_buffer, y); + } +} + +static int check_format_funcs(struct vkms_crtc_state *crtc_state, + struct vkms_writeback_job *active_wb) +{ + struct vkms_plane_state **planes = crtc_state->active_planes; + u32 n_active_planes = crtc_state->num_active_planes; + + for (size_t i = 0; i < n_active_planes; i++) + if (!planes[i]->pixel_read) + return -1; + + if (active_wb && !active_wb->wb_write) + return -1; + + return 0; +} + +static int check_iosys_map(struct vkms_crtc_state *crtc_state) +{ + struct vkms_plane_state **plane_state = crtc_state->active_planes; + u32 n_active_planes = crtc_state->num_active_planes; + + for (size_t i = 0; i < n_active_planes; i++) + if (iosys_map_is_null(&plane_state[i]->frame_info->map[0])) + return -1; + + return 0; +} + +static int compose_active_planes(struct vkms_writeback_job *active_wb, + struct vkms_crtc_state *crtc_state, + u32 *crc32) +{ + size_t line_width, pixel_size = sizeof(struct pixel_argb_u16); + struct line_buffer output_buffer, stage_buffer; + int ret = 0; + + /* + * This check exists so we can call `crc32_le` for the entire line + * instead doing it for each channel of each pixel in case + * `struct `pixel_argb_u16` had any gap added by the compiler + * between the struct fields. + */ + static_assert(sizeof(struct pixel_argb_u16) == 8); + + if (WARN_ON(check_iosys_map(crtc_state))) + return -EINVAL; + + if (WARN_ON(check_format_funcs(crtc_state, active_wb))) + return -EINVAL; + + line_width = crtc_state->base.crtc->mode.hdisplay; + stage_buffer.n_pixels = line_width; + output_buffer.n_pixels = line_width; + + stage_buffer.pixels = kvmalloc(line_width * pixel_size, GFP_KERNEL); + if (!stage_buffer.pixels) { + DRM_ERROR("Cannot allocate memory for the output line buffer"); + return -ENOMEM; + } + + output_buffer.pixels = kvmalloc(line_width * pixel_size, GFP_KERNEL); + if (!output_buffer.pixels) { + DRM_ERROR("Cannot allocate memory for intermediate line buffer"); + ret = -ENOMEM; + goto free_stage_buffer; + } + + blend(active_wb, crtc_state, crc32, &stage_buffer, + &output_buffer, line_width * pixel_size); + + kvfree(output_buffer.pixels); +free_stage_buffer: + kvfree(stage_buffer.pixels); + + return ret; +} + +/** + * vkms_composer_worker - ordered work_struct to compute CRC + * + * @work: work_struct + * + * Work handler for composing and computing CRCs. work_struct scheduled in + * an ordered workqueue that's periodically scheduled to run by + * vkms_vblank_simulate() and flushed at vkms_atomic_commit_tail(). + */ +void vkms_composer_worker(struct work_struct *work) +{ + struct vkms_crtc_state *crtc_state = container_of(work, + struct vkms_crtc_state, + composer_work); + struct drm_crtc *crtc = crtc_state->base.crtc; + struct vkms_writeback_job *active_wb = crtc_state->active_writeback; + struct vkms_output *out = drm_crtc_to_vkms_output(crtc); + bool crc_pending, wb_pending; + u64 frame_start, frame_end; + u32 crc32 = 0; + int ret; + + spin_lock_irq(&out->composer_lock); + frame_start = crtc_state->frame_start; + frame_end = crtc_state->frame_end; + crc_pending = crtc_state->crc_pending; + wb_pending = crtc_state->wb_pending; + crtc_state->frame_start = 0; + crtc_state->frame_end = 0; + crtc_state->crc_pending = false; + spin_unlock_irq(&out->composer_lock); + + /* + * We raced with the vblank hrtimer and previous work already computed + * the crc, nothing to do. + */ + if (!crc_pending) + return; + + if (wb_pending) + ret = compose_active_planes(active_wb, crtc_state, &crc32); + else + ret = compose_active_planes(NULL, crtc_state, &crc32); + + if (ret) + return; + + if (wb_pending) { + drm_writeback_signal_completion(&out->wb_connector, 0); + spin_lock_irq(&out->composer_lock); + crtc_state->wb_pending = false; + spin_unlock_irq(&out->composer_lock); + } + + /* + * The worker can fall behind the vblank hrtimer, make sure we catch up. + */ + while (frame_start <= frame_end) + drm_crtc_add_crc_entry(crtc, true, frame_start++, &crc32); +} + +static const char * const pipe_crc_sources[] = {"auto"}; + +const char *const *vkms_get_crc_sources(struct drm_crtc *crtc, + size_t *count) +{ + *count = ARRAY_SIZE(pipe_crc_sources); + return pipe_crc_sources; +} + +static int vkms_crc_parse_source(const char *src_name, bool *enabled) +{ + int ret = 0; + + if (!src_name) { + *enabled = false; + } else if (strcmp(src_name, "auto") == 0) { + *enabled = true; + } else { + *enabled = false; + ret = -EINVAL; + } + + return ret; +} + +int vkms_verify_crc_source(struct drm_crtc *crtc, const char *src_name, + size_t *values_cnt) +{ + bool enabled; + + if (vkms_crc_parse_source(src_name, &enabled) < 0) { + DRM_DEBUG_DRIVER("unknown source %s\n", src_name); + return -EINVAL; + } + + *values_cnt = 1; + + return 0; +} + +void vkms_set_composer(struct vkms_output *out, bool enabled) +{ + bool old_enabled; + + if (enabled) + drm_crtc_vblank_get(&out->crtc); + + spin_lock_irq(&out->lock); + old_enabled = out->composer_enabled; + out->composer_enabled = enabled; + spin_unlock_irq(&out->lock); + + if (old_enabled) + drm_crtc_vblank_put(&out->crtc); +} + +int vkms_set_crc_source(struct drm_crtc *crtc, const char *src_name) +{ + struct vkms_output *out = drm_crtc_to_vkms_output(crtc); + bool enabled = false; + int ret = 0; + + ret = vkms_crc_parse_source(src_name, &enabled); + + vkms_set_composer(out, enabled); + + return ret; +} diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c new file mode 100644 index 000000000..57bbd32e9 --- /dev/null +++ b/drivers/gpu/drm/vkms/vkms_crtc.c @@ -0,0 +1,302 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include <linux/dma-fence.h> + +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_probe_helper.h> +#include <drm/drm_vblank.h> + +#include "vkms_drv.h" + +static enum hrtimer_restart vkms_vblank_simulate(struct hrtimer *timer) +{ + struct vkms_output *output = container_of(timer, struct vkms_output, + vblank_hrtimer); + struct drm_crtc *crtc = &output->crtc; + struct vkms_crtc_state *state; + u64 ret_overrun; + bool ret, fence_cookie; + + fence_cookie = dma_fence_begin_signalling(); + + ret_overrun = hrtimer_forward_now(&output->vblank_hrtimer, + output->period_ns); + if (ret_overrun != 1) + pr_warn("%s: vblank timer overrun\n", __func__); + + spin_lock(&output->lock); + ret = drm_crtc_handle_vblank(crtc); + if (!ret) + DRM_ERROR("vkms failure on handling vblank"); + + state = output->composer_state; + spin_unlock(&output->lock); + + if (state && output->composer_enabled) { + u64 frame = drm_crtc_accurate_vblank_count(crtc); + + /* update frame_start only if a queued vkms_composer_worker() + * has read the data + */ + spin_lock(&output->composer_lock); + if (!state->crc_pending) + state->frame_start = frame; + else + DRM_DEBUG_DRIVER("crc worker falling behind, frame_start: %llu, frame_end: %llu\n", + state->frame_start, frame); + state->frame_end = frame; + state->crc_pending = true; + spin_unlock(&output->composer_lock); + + ret = queue_work(output->composer_workq, &state->composer_work); + if (!ret) + DRM_DEBUG_DRIVER("Composer worker already queued\n"); + } + + dma_fence_end_signalling(fence_cookie); + + return HRTIMER_RESTART; +} + +static int vkms_enable_vblank(struct drm_crtc *crtc) +{ + struct drm_device *dev = crtc->dev; + unsigned int pipe = drm_crtc_index(crtc); + struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; + struct vkms_output *out = drm_crtc_to_vkms_output(crtc); + + drm_calc_timestamping_constants(crtc, &crtc->mode); + + hrtimer_init(&out->vblank_hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + out->vblank_hrtimer.function = &vkms_vblank_simulate; + out->period_ns = ktime_set(0, vblank->framedur_ns); + hrtimer_start(&out->vblank_hrtimer, out->period_ns, HRTIMER_MODE_REL); + + return 0; +} + +static void vkms_disable_vblank(struct drm_crtc *crtc) +{ + struct vkms_output *out = drm_crtc_to_vkms_output(crtc); + + hrtimer_cancel(&out->vblank_hrtimer); +} + +static bool vkms_get_vblank_timestamp(struct drm_crtc *crtc, + int *max_error, ktime_t *vblank_time, + bool in_vblank_irq) +{ + struct drm_device *dev = crtc->dev; + unsigned int pipe = crtc->index; + struct vkms_device *vkmsdev = drm_device_to_vkms_device(dev); + struct vkms_output *output = &vkmsdev->output; + struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; + + if (!READ_ONCE(vblank->enabled)) { + *vblank_time = ktime_get(); + return true; + } + + *vblank_time = READ_ONCE(output->vblank_hrtimer.node.expires); + + if (WARN_ON(*vblank_time == vblank->time)) + return true; + + /* + * To prevent races we roll the hrtimer forward before we do any + * interrupt processing - this is how real hw works (the interrupt is + * only generated after all the vblank registers are updated) and what + * the vblank core expects. Therefore we need to always correct the + * timestampe by one frame. + */ + *vblank_time -= output->period_ns; + + return true; +} + +static struct drm_crtc_state * +vkms_atomic_crtc_duplicate_state(struct drm_crtc *crtc) +{ + struct vkms_crtc_state *vkms_state; + + if (WARN_ON(!crtc->state)) + return NULL; + + vkms_state = kzalloc(sizeof(*vkms_state), GFP_KERNEL); + if (!vkms_state) + return NULL; + + __drm_atomic_helper_crtc_duplicate_state(crtc, &vkms_state->base); + + INIT_WORK(&vkms_state->composer_work, vkms_composer_worker); + + return &vkms_state->base; +} + +static void vkms_atomic_crtc_destroy_state(struct drm_crtc *crtc, + struct drm_crtc_state *state) +{ + struct vkms_crtc_state *vkms_state = to_vkms_crtc_state(state); + + __drm_atomic_helper_crtc_destroy_state(state); + + WARN_ON(work_pending(&vkms_state->composer_work)); + kfree(vkms_state->active_planes); + kfree(vkms_state); +} + +static void vkms_atomic_crtc_reset(struct drm_crtc *crtc) +{ + struct vkms_crtc_state *vkms_state = + kzalloc(sizeof(*vkms_state), GFP_KERNEL); + + if (crtc->state) + vkms_atomic_crtc_destroy_state(crtc, crtc->state); + + __drm_atomic_helper_crtc_reset(crtc, &vkms_state->base); + if (vkms_state) + INIT_WORK(&vkms_state->composer_work, vkms_composer_worker); +} + +static const struct drm_crtc_funcs vkms_crtc_funcs = { + .set_config = drm_atomic_helper_set_config, + .destroy = drm_crtc_cleanup, + .page_flip = drm_atomic_helper_page_flip, + .reset = vkms_atomic_crtc_reset, + .atomic_duplicate_state = vkms_atomic_crtc_duplicate_state, + .atomic_destroy_state = vkms_atomic_crtc_destroy_state, + .enable_vblank = vkms_enable_vblank, + .disable_vblank = vkms_disable_vblank, + .get_vblank_timestamp = vkms_get_vblank_timestamp, + .get_crc_sources = vkms_get_crc_sources, + .set_crc_source = vkms_set_crc_source, + .verify_crc_source = vkms_verify_crc_source, +}; + +static int vkms_crtc_atomic_check(struct drm_crtc *crtc, + struct drm_atomic_state *state) +{ + struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, + crtc); + struct vkms_crtc_state *vkms_state = to_vkms_crtc_state(crtc_state); + struct drm_plane *plane; + struct drm_plane_state *plane_state; + int i = 0, ret; + + if (vkms_state->active_planes) + return 0; + + ret = drm_atomic_add_affected_planes(crtc_state->state, crtc); + if (ret < 0) + return ret; + + drm_for_each_plane_mask(plane, crtc->dev, crtc_state->plane_mask) { + plane_state = drm_atomic_get_existing_plane_state(crtc_state->state, + plane); + WARN_ON(!plane_state); + + if (!plane_state->visible) + continue; + + i++; + } + + vkms_state->active_planes = kcalloc(i, sizeof(plane), GFP_KERNEL); + if (!vkms_state->active_planes) + return -ENOMEM; + vkms_state->num_active_planes = i; + + i = 0; + drm_for_each_plane_mask(plane, crtc->dev, crtc_state->plane_mask) { + plane_state = drm_atomic_get_existing_plane_state(crtc_state->state, + plane); + + if (!plane_state->visible) + continue; + + vkms_state->active_planes[i++] = + to_vkms_plane_state(plane_state); + } + + return 0; +} + +static void vkms_crtc_atomic_enable(struct drm_crtc *crtc, + struct drm_atomic_state *state) +{ + drm_crtc_vblank_on(crtc); +} + +static void vkms_crtc_atomic_disable(struct drm_crtc *crtc, + struct drm_atomic_state *state) +{ + drm_crtc_vblank_off(crtc); +} + +static void vkms_crtc_atomic_begin(struct drm_crtc *crtc, + struct drm_atomic_state *state) +{ + struct vkms_output *vkms_output = drm_crtc_to_vkms_output(crtc); + + /* This lock is held across the atomic commit to block vblank timer + * from scheduling vkms_composer_worker until the composer is updated + */ + spin_lock_irq(&vkms_output->lock); +} + +static void vkms_crtc_atomic_flush(struct drm_crtc *crtc, + struct drm_atomic_state *state) +{ + struct vkms_output *vkms_output = drm_crtc_to_vkms_output(crtc); + + if (crtc->state->event) { + spin_lock(&crtc->dev->event_lock); + + if (drm_crtc_vblank_get(crtc) != 0) + drm_crtc_send_vblank_event(crtc, crtc->state->event); + else + drm_crtc_arm_vblank_event(crtc, crtc->state->event); + + spin_unlock(&crtc->dev->event_lock); + + crtc->state->event = NULL; + } + + vkms_output->composer_state = to_vkms_crtc_state(crtc->state); + + spin_unlock_irq(&vkms_output->lock); +} + +static const struct drm_crtc_helper_funcs vkms_crtc_helper_funcs = { + .atomic_check = vkms_crtc_atomic_check, + .atomic_begin = vkms_crtc_atomic_begin, + .atomic_flush = vkms_crtc_atomic_flush, + .atomic_enable = vkms_crtc_atomic_enable, + .atomic_disable = vkms_crtc_atomic_disable, +}; + +int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc, + struct drm_plane *primary, struct drm_plane *cursor) +{ + struct vkms_output *vkms_out = drm_crtc_to_vkms_output(crtc); + int ret; + + ret = drm_crtc_init_with_planes(dev, crtc, primary, cursor, + &vkms_crtc_funcs, NULL); + if (ret) { + DRM_ERROR("Failed to init CRTC\n"); + return ret; + } + + drm_crtc_helper_add(crtc, &vkms_crtc_helper_funcs); + + spin_lock_init(&vkms_out->lock); + spin_lock_init(&vkms_out->composer_lock); + + vkms_out->composer_workq = alloc_ordered_workqueue("vkms_composer", 0); + if (!vkms_out->composer_workq) + return -ENOMEM; + + return ret; +} diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c new file mode 100644 index 000000000..f716c5796 --- /dev/null +++ b/drivers/gpu/drm/vkms/vkms_drv.c @@ -0,0 +1,275 @@ +// SPDX-License-Identifier: GPL-2.0+ + +/** + * DOC: vkms (Virtual Kernel Modesetting) + * + * VKMS is a software-only model of a KMS driver that is useful for testing + * and for running X (or similar) on headless machines. VKMS aims to enable + * a virtual display with no need of a hardware display capability, releasing + * the GPU in DRM API tests. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> + +#include <drm/drm_gem.h> +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_file.h> +#include <drm/drm_gem_framebuffer_helper.h> +#include <drm/drm_ioctl.h> +#include <drm/drm_managed.h> +#include <drm/drm_probe_helper.h> +#include <drm/drm_gem_shmem_helper.h> +#include <drm/drm_vblank.h> + +#include "vkms_drv.h" + +#include <drm/drm_print.h> +#include <drm/drm_debugfs.h> + +#define DRIVER_NAME "vkms" +#define DRIVER_DESC "Virtual Kernel Mode Setting" +#define DRIVER_DATE "20180514" +#define DRIVER_MAJOR 1 +#define DRIVER_MINOR 0 + +static struct vkms_config *default_config; + +static bool enable_cursor = true; +module_param_named(enable_cursor, enable_cursor, bool, 0444); +MODULE_PARM_DESC(enable_cursor, "Enable/Disable cursor support"); + +static bool enable_writeback = true; +module_param_named(enable_writeback, enable_writeback, bool, 0444); +MODULE_PARM_DESC(enable_writeback, "Enable/Disable writeback connector support"); + +static bool enable_overlay; +module_param_named(enable_overlay, enable_overlay, bool, 0444); +MODULE_PARM_DESC(enable_overlay, "Enable/Disable overlay support"); + +DEFINE_DRM_GEM_FOPS(vkms_driver_fops); + +static void vkms_release(struct drm_device *dev) +{ + struct vkms_device *vkms = drm_device_to_vkms_device(dev); + + if (vkms->output.composer_workq) + destroy_workqueue(vkms->output.composer_workq); +} + +static void vkms_atomic_commit_tail(struct drm_atomic_state *old_state) +{ + struct drm_device *dev = old_state->dev; + struct drm_crtc *crtc; + struct drm_crtc_state *old_crtc_state; + int i; + + drm_atomic_helper_commit_modeset_disables(dev, old_state); + + drm_atomic_helper_commit_planes(dev, old_state, 0); + + drm_atomic_helper_commit_modeset_enables(dev, old_state); + + drm_atomic_helper_fake_vblank(old_state); + + drm_atomic_helper_commit_hw_done(old_state); + + drm_atomic_helper_wait_for_flip_done(dev, old_state); + + for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) { + struct vkms_crtc_state *vkms_state = + to_vkms_crtc_state(old_crtc_state); + + flush_work(&vkms_state->composer_work); + } + + drm_atomic_helper_cleanup_planes(dev, old_state); +} + +static int vkms_config_show(struct seq_file *m, void *data) +{ + struct drm_info_node *node = (struct drm_info_node *)m->private; + struct drm_device *dev = node->minor->dev; + struct vkms_device *vkmsdev = drm_device_to_vkms_device(dev); + + seq_printf(m, "writeback=%d\n", vkmsdev->config->writeback); + seq_printf(m, "cursor=%d\n", vkmsdev->config->cursor); + seq_printf(m, "overlay=%d\n", vkmsdev->config->overlay); + + return 0; +} + +static const struct drm_info_list vkms_config_debugfs_list[] = { + { "vkms_config", vkms_config_show, 0 }, +}; + +static void vkms_config_debugfs_init(struct drm_minor *minor) +{ + drm_debugfs_create_files(vkms_config_debugfs_list, ARRAY_SIZE(vkms_config_debugfs_list), + minor->debugfs_root, minor); +} + +static const struct drm_driver vkms_driver = { + .driver_features = DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_GEM, + .release = vkms_release, + .fops = &vkms_driver_fops, + DRM_GEM_SHMEM_DRIVER_OPS, + + .debugfs_init = vkms_config_debugfs_init, + + .name = DRIVER_NAME, + .desc = DRIVER_DESC, + .date = DRIVER_DATE, + .major = DRIVER_MAJOR, + .minor = DRIVER_MINOR, +}; + +static const struct drm_mode_config_funcs vkms_mode_funcs = { + .fb_create = drm_gem_fb_create, + .atomic_check = drm_atomic_helper_check, + .atomic_commit = drm_atomic_helper_commit, +}; + +static const struct drm_mode_config_helper_funcs vkms_mode_config_helpers = { + .atomic_commit_tail = vkms_atomic_commit_tail, +}; + +static int vkms_modeset_init(struct vkms_device *vkmsdev) +{ + struct drm_device *dev = &vkmsdev->drm; + + drm_mode_config_init(dev); + dev->mode_config.funcs = &vkms_mode_funcs; + dev->mode_config.min_width = XRES_MIN; + dev->mode_config.min_height = YRES_MIN; + dev->mode_config.max_width = XRES_MAX; + dev->mode_config.max_height = YRES_MAX; + dev->mode_config.cursor_width = 512; + dev->mode_config.cursor_height = 512; + /* FIXME: There's a confusion between bpp and depth between this and + * fbdev helpers. We have to go with 0, meaning "pick the default", + * which ix XRGB8888 in all cases. */ + dev->mode_config.preferred_depth = 0; + dev->mode_config.helper_private = &vkms_mode_config_helpers; + + return vkms_output_init(vkmsdev, 0); +} + +static int vkms_create(struct vkms_config *config) +{ + int ret; + struct platform_device *pdev; + struct vkms_device *vkms_device; + + pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + + if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) { + ret = -ENOMEM; + goto out_unregister; + } + + vkms_device = devm_drm_dev_alloc(&pdev->dev, &vkms_driver, + struct vkms_device, drm); + if (IS_ERR(vkms_device)) { + ret = PTR_ERR(vkms_device); + goto out_devres; + } + vkms_device->platform = pdev; + vkms_device->config = config; + config->dev = vkms_device; + + ret = dma_coerce_mask_and_coherent(vkms_device->drm.dev, + DMA_BIT_MASK(64)); + + if (ret) { + DRM_ERROR("Could not initialize DMA support\n"); + goto out_devres; + } + + ret = drm_vblank_init(&vkms_device->drm, 1); + if (ret) { + DRM_ERROR("Failed to vblank\n"); + goto out_devres; + } + + ret = vkms_modeset_init(vkms_device); + if (ret) + goto out_devres; + + ret = drm_dev_register(&vkms_device->drm, 0); + if (ret) + goto out_devres; + + drm_fbdev_generic_setup(&vkms_device->drm, 0); + + return 0; + +out_devres: + devres_release_group(&pdev->dev, NULL); +out_unregister: + platform_device_unregister(pdev); + return ret; +} + +static int __init vkms_init(void) +{ + int ret; + struct vkms_config *config; + + config = kmalloc(sizeof(*config), GFP_KERNEL); + if (!config) + return -ENOMEM; + + default_config = config; + + config->cursor = enable_cursor; + config->writeback = enable_writeback; + config->overlay = enable_overlay; + + ret = vkms_create(config); + if (ret) + kfree(config); + + return ret; +} + +static void vkms_destroy(struct vkms_config *config) +{ + struct platform_device *pdev; + + if (!config->dev) { + DRM_INFO("vkms_device is NULL.\n"); + return; + } + + pdev = config->dev->platform; + + drm_dev_unregister(&config->dev->drm); + drm_atomic_helper_shutdown(&config->dev->drm); + devres_release_group(&pdev->dev, NULL); + platform_device_unregister(pdev); + + config->dev = NULL; +} + +static void __exit vkms_exit(void) +{ + if (default_config->dev) + vkms_destroy(default_config); + + kfree(default_config); +} + +module_init(vkms_init); +module_exit(vkms_exit); + +MODULE_AUTHOR("Haneen Mohammed <hamohammed.sa@gmail.com>"); +MODULE_AUTHOR("Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>"); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h new file mode 100644 index 000000000..de4efc0a3 --- /dev/null +++ b/drivers/gpu/drm/vkms/vkms_drv.h @@ -0,0 +1,162 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ + +#ifndef _VKMS_DRV_H_ +#define _VKMS_DRV_H_ + +#include <linux/hrtimer.h> + +#include <drm/drm.h> +#include <drm/drm_framebuffer.h> +#include <drm/drm_gem.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_encoder.h> +#include <drm/drm_writeback.h> + +#define XRES_MIN 20 +#define YRES_MIN 20 + +#define XRES_DEF 1024 +#define YRES_DEF 768 + +#define XRES_MAX 8192 +#define YRES_MAX 8192 + +#define NUM_OVERLAY_PLANES 8 + +struct vkms_frame_info { + struct drm_framebuffer *fb; + struct drm_rect src, dst; + struct iosys_map map[DRM_FORMAT_MAX_PLANES]; + unsigned int offset; + unsigned int pitch; + unsigned int cpp; +}; + +struct pixel_argb_u16 { + u16 a, r, g, b; +}; + +struct line_buffer { + size_t n_pixels; + struct pixel_argb_u16 *pixels; +}; + +struct vkms_writeback_job { + struct iosys_map data[DRM_FORMAT_MAX_PLANES]; + struct vkms_frame_info wb_frame_info; + void (*wb_write)(struct vkms_frame_info *frame_info, + const struct line_buffer *buffer, int y); +}; + +/** + * vkms_plane_state - Driver specific plane state + * @base: base plane state + * @frame_info: data required for composing computation + */ +struct vkms_plane_state { + struct drm_shadow_plane_state base; + struct vkms_frame_info *frame_info; + void (*pixel_read)(u8 *src_buffer, struct pixel_argb_u16 *out_pixel); +}; + +struct vkms_plane { + struct drm_plane base; +}; + +/** + * vkms_crtc_state - Driver specific CRTC state + * @base: base CRTC state + * @composer_work: work struct to compose and add CRC entries + * @n_frame_start: start frame number for computed CRC + * @n_frame_end: end frame number for computed CRC + */ +struct vkms_crtc_state { + struct drm_crtc_state base; + struct work_struct composer_work; + + int num_active_planes; + /* stack of active planes for crc computation, should be in z order */ + struct vkms_plane_state **active_planes; + struct vkms_writeback_job *active_writeback; + + /* below four are protected by vkms_output.composer_lock */ + bool crc_pending; + bool wb_pending; + u64 frame_start; + u64 frame_end; +}; + +struct vkms_output { + struct drm_crtc crtc; + struct drm_encoder encoder; + struct drm_connector connector; + struct drm_writeback_connector wb_connector; + struct hrtimer vblank_hrtimer; + ktime_t period_ns; + struct drm_pending_vblank_event *event; + /* ordered wq for composer_work */ + struct workqueue_struct *composer_workq; + /* protects concurrent access to composer */ + spinlock_t lock; + + /* protected by @lock */ + bool composer_enabled; + struct vkms_crtc_state *composer_state; + + spinlock_t composer_lock; +}; + +struct vkms_device; + +struct vkms_config { + bool writeback; + bool cursor; + bool overlay; + /* only set when instantiated */ + struct vkms_device *dev; +}; + +struct vkms_device { + struct drm_device drm; + struct platform_device *platform; + struct vkms_output output; + const struct vkms_config *config; +}; + +#define drm_crtc_to_vkms_output(target) \ + container_of(target, struct vkms_output, crtc) + +#define drm_device_to_vkms_device(target) \ + container_of(target, struct vkms_device, drm) + +#define to_vkms_crtc_state(target)\ + container_of(target, struct vkms_crtc_state, base) + +#define to_vkms_plane_state(target)\ + container_of(target, struct vkms_plane_state, base.base) + +/* CRTC */ +int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc, + struct drm_plane *primary, struct drm_plane *cursor); + +int vkms_output_init(struct vkms_device *vkmsdev, int index); + +struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev, + enum drm_plane_type type, int index); + +/* CRC Support */ +const char *const *vkms_get_crc_sources(struct drm_crtc *crtc, + size_t *count); +int vkms_set_crc_source(struct drm_crtc *crtc, const char *src_name); +int vkms_verify_crc_source(struct drm_crtc *crtc, const char *source_name, + size_t *values_cnt); + +/* Composer Support */ +void vkms_composer_worker(struct work_struct *work); +void vkms_set_composer(struct vkms_output *out, bool enabled); +void vkms_compose_row(struct line_buffer *stage_buffer, struct vkms_plane_state *plane, int y); + +/* Writeback */ +int vkms_enable_writeback_connector(struct vkms_device *vkmsdev); + +#endif /* _VKMS_DRV_H_ */ diff --git a/drivers/gpu/drm/vkms/vkms_formats.c b/drivers/gpu/drm/vkms/vkms_formats.c new file mode 100644 index 000000000..b11342026 --- /dev/null +++ b/drivers/gpu/drm/vkms/vkms_formats.c @@ -0,0 +1,261 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include <linux/kernel.h> +#include <linux/minmax.h> +#include <drm/drm_rect.h> +#include <drm/drm_fixed.h> + +#include "vkms_formats.h" + +static size_t pixel_offset(const struct vkms_frame_info *frame_info, int x, int y) +{ + return frame_info->offset + (y * frame_info->pitch) + + (x * frame_info->cpp); +} + +/* + * packed_pixels_addr - Get the pointer to pixel of a given pair of coordinates + * + * @frame_info: Buffer metadata + * @x: The x(width) coordinate of the 2D buffer + * @y: The y(Heigth) coordinate of the 2D buffer + * + * Takes the information stored in the frame_info, a pair of coordinates, and + * returns the address of the first color channel. + * This function assumes the channels are packed together, i.e. a color channel + * comes immediately after another in the memory. And therefore, this function + * doesn't work for YUV with chroma subsampling (e.g. YUV420 and NV21). + */ +static void *packed_pixels_addr(const struct vkms_frame_info *frame_info, + int x, int y) +{ + size_t offset = pixel_offset(frame_info, x, y); + + return (u8 *)frame_info->map[0].vaddr + offset; +} + +static void *get_packed_src_addr(const struct vkms_frame_info *frame_info, int y) +{ + int x_src = frame_info->src.x1 >> 16; + int y_src = y - frame_info->dst.y1 + (frame_info->src.y1 >> 16); + + return packed_pixels_addr(frame_info, x_src, y_src); +} + +static void ARGB8888_to_argb_u16(u8 *src_pixels, struct pixel_argb_u16 *out_pixel) +{ + /* + * The 257 is the "conversion ratio". This number is obtained by the + * (2^16 - 1) / (2^8 - 1) division. Which, in this case, tries to get + * the best color value in a pixel format with more possibilities. + * A similar idea applies to others RGB color conversions. + */ + out_pixel->a = (u16)src_pixels[3] * 257; + out_pixel->r = (u16)src_pixels[2] * 257; + out_pixel->g = (u16)src_pixels[1] * 257; + out_pixel->b = (u16)src_pixels[0] * 257; +} + +static void XRGB8888_to_argb_u16(u8 *src_pixels, struct pixel_argb_u16 *out_pixel) +{ + out_pixel->a = (u16)0xffff; + out_pixel->r = (u16)src_pixels[2] * 257; + out_pixel->g = (u16)src_pixels[1] * 257; + out_pixel->b = (u16)src_pixels[0] * 257; +} + +static void ARGB16161616_to_argb_u16(u8 *src_pixels, struct pixel_argb_u16 *out_pixel) +{ + u16 *pixels = (u16 *)src_pixels; + + out_pixel->a = le16_to_cpu(pixels[3]); + out_pixel->r = le16_to_cpu(pixels[2]); + out_pixel->g = le16_to_cpu(pixels[1]); + out_pixel->b = le16_to_cpu(pixels[0]); +} + +static void XRGB16161616_to_argb_u16(u8 *src_pixels, struct pixel_argb_u16 *out_pixel) +{ + u16 *pixels = (u16 *)src_pixels; + + out_pixel->a = (u16)0xffff; + out_pixel->r = le16_to_cpu(pixels[2]); + out_pixel->g = le16_to_cpu(pixels[1]); + out_pixel->b = le16_to_cpu(pixels[0]); +} + +static void RGB565_to_argb_u16(u8 *src_pixels, struct pixel_argb_u16 *out_pixel) +{ + u16 *pixels = (u16 *)src_pixels; + + s64 fp_rb_ratio = drm_fixp_div(drm_int2fixp(65535), drm_int2fixp(31)); + s64 fp_g_ratio = drm_fixp_div(drm_int2fixp(65535), drm_int2fixp(63)); + + u16 rgb_565 = le16_to_cpu(*pixels); + s64 fp_r = drm_int2fixp((rgb_565 >> 11) & 0x1f); + s64 fp_g = drm_int2fixp((rgb_565 >> 5) & 0x3f); + s64 fp_b = drm_int2fixp(rgb_565 & 0x1f); + + out_pixel->a = (u16)0xffff; + out_pixel->r = drm_fixp2int_round(drm_fixp_mul(fp_r, fp_rb_ratio)); + out_pixel->g = drm_fixp2int_round(drm_fixp_mul(fp_g, fp_g_ratio)); + out_pixel->b = drm_fixp2int_round(drm_fixp_mul(fp_b, fp_rb_ratio)); +} + +void vkms_compose_row(struct line_buffer *stage_buffer, struct vkms_plane_state *plane, int y) +{ + struct pixel_argb_u16 *out_pixels = stage_buffer->pixels; + struct vkms_frame_info *frame_info = plane->frame_info; + u8 *src_pixels = get_packed_src_addr(frame_info, y); + int limit = min_t(size_t, drm_rect_width(&frame_info->dst), stage_buffer->n_pixels); + + for (size_t x = 0; x < limit; x++, src_pixels += frame_info->cpp) + plane->pixel_read(src_pixels, &out_pixels[x]); +} + +/* + * The following functions take an line of argb_u16 pixels from the + * src_buffer, convert them to a specific format, and store them in the + * destination. + * + * They are used in the `compose_active_planes` to convert and store a line + * from the src_buffer to the writeback buffer. + */ +static void argb_u16_to_ARGB8888(struct vkms_frame_info *frame_info, + const struct line_buffer *src_buffer, int y) +{ + int x_dst = frame_info->dst.x1; + u8 *dst_pixels = packed_pixels_addr(frame_info, x_dst, y); + struct pixel_argb_u16 *in_pixels = src_buffer->pixels; + int x_limit = min_t(size_t, drm_rect_width(&frame_info->dst), + src_buffer->n_pixels); + + for (size_t x = 0; x < x_limit; x++, dst_pixels += 4) { + /* + * This sequence below is important because the format's byte order is + * in little-endian. In the case of the ARGB8888 the memory is + * organized this way: + * + * | Addr | = blue channel + * | Addr + 1 | = green channel + * | Addr + 2 | = Red channel + * | Addr + 3 | = Alpha channel + */ + dst_pixels[3] = DIV_ROUND_CLOSEST(in_pixels[x].a, 257); + dst_pixels[2] = DIV_ROUND_CLOSEST(in_pixels[x].r, 257); + dst_pixels[1] = DIV_ROUND_CLOSEST(in_pixels[x].g, 257); + dst_pixels[0] = DIV_ROUND_CLOSEST(in_pixels[x].b, 257); + } +} + +static void argb_u16_to_XRGB8888(struct vkms_frame_info *frame_info, + const struct line_buffer *src_buffer, int y) +{ + int x_dst = frame_info->dst.x1; + u8 *dst_pixels = packed_pixels_addr(frame_info, x_dst, y); + struct pixel_argb_u16 *in_pixels = src_buffer->pixels; + int x_limit = min_t(size_t, drm_rect_width(&frame_info->dst), + src_buffer->n_pixels); + + for (size_t x = 0; x < x_limit; x++, dst_pixels += 4) { + dst_pixels[3] = 0xff; + dst_pixels[2] = DIV_ROUND_CLOSEST(in_pixels[x].r, 257); + dst_pixels[1] = DIV_ROUND_CLOSEST(in_pixels[x].g, 257); + dst_pixels[0] = DIV_ROUND_CLOSEST(in_pixels[x].b, 257); + } +} + +static void argb_u16_to_ARGB16161616(struct vkms_frame_info *frame_info, + const struct line_buffer *src_buffer, int y) +{ + int x_dst = frame_info->dst.x1; + u16 *dst_pixels = packed_pixels_addr(frame_info, x_dst, y); + struct pixel_argb_u16 *in_pixels = src_buffer->pixels; + int x_limit = min_t(size_t, drm_rect_width(&frame_info->dst), + src_buffer->n_pixels); + + for (size_t x = 0; x < x_limit; x++, dst_pixels += 4) { + dst_pixels[3] = cpu_to_le16(in_pixels[x].a); + dst_pixels[2] = cpu_to_le16(in_pixels[x].r); + dst_pixels[1] = cpu_to_le16(in_pixels[x].g); + dst_pixels[0] = cpu_to_le16(in_pixels[x].b); + } +} + +static void argb_u16_to_XRGB16161616(struct vkms_frame_info *frame_info, + const struct line_buffer *src_buffer, int y) +{ + int x_dst = frame_info->dst.x1; + u16 *dst_pixels = packed_pixels_addr(frame_info, x_dst, y); + struct pixel_argb_u16 *in_pixels = src_buffer->pixels; + int x_limit = min_t(size_t, drm_rect_width(&frame_info->dst), + src_buffer->n_pixels); + + for (size_t x = 0; x < x_limit; x++, dst_pixels += 4) { + dst_pixels[3] = 0xffff; + dst_pixels[2] = cpu_to_le16(in_pixels[x].r); + dst_pixels[1] = cpu_to_le16(in_pixels[x].g); + dst_pixels[0] = cpu_to_le16(in_pixels[x].b); + } +} + +static void argb_u16_to_RGB565(struct vkms_frame_info *frame_info, + const struct line_buffer *src_buffer, int y) +{ + int x_dst = frame_info->dst.x1; + u16 *dst_pixels = packed_pixels_addr(frame_info, x_dst, y); + struct pixel_argb_u16 *in_pixels = src_buffer->pixels; + int x_limit = min_t(size_t, drm_rect_width(&frame_info->dst), + src_buffer->n_pixels); + + s64 fp_rb_ratio = drm_fixp_div(drm_int2fixp(65535), drm_int2fixp(31)); + s64 fp_g_ratio = drm_fixp_div(drm_int2fixp(65535), drm_int2fixp(63)); + + for (size_t x = 0; x < x_limit; x++, dst_pixels++) { + s64 fp_r = drm_int2fixp(in_pixels[x].r); + s64 fp_g = drm_int2fixp(in_pixels[x].g); + s64 fp_b = drm_int2fixp(in_pixels[x].b); + + u16 r = drm_fixp2int_round(drm_fixp_div(fp_r, fp_rb_ratio)); + u16 g = drm_fixp2int_round(drm_fixp_div(fp_g, fp_g_ratio)); + u16 b = drm_fixp2int_round(drm_fixp_div(fp_b, fp_rb_ratio)); + + *dst_pixels = cpu_to_le16(r << 11 | g << 5 | b); + } +} + +void *get_pixel_conversion_function(u32 format) +{ + switch (format) { + case DRM_FORMAT_ARGB8888: + return &ARGB8888_to_argb_u16; + case DRM_FORMAT_XRGB8888: + return &XRGB8888_to_argb_u16; + case DRM_FORMAT_ARGB16161616: + return &ARGB16161616_to_argb_u16; + case DRM_FORMAT_XRGB16161616: + return &XRGB16161616_to_argb_u16; + case DRM_FORMAT_RGB565: + return &RGB565_to_argb_u16; + default: + return NULL; + } +} + +void *get_line_to_frame_function(u32 format) +{ + switch (format) { + case DRM_FORMAT_ARGB8888: + return &argb_u16_to_ARGB8888; + case DRM_FORMAT_XRGB8888: + return &argb_u16_to_XRGB8888; + case DRM_FORMAT_ARGB16161616: + return &argb_u16_to_ARGB16161616; + case DRM_FORMAT_XRGB16161616: + return &argb_u16_to_XRGB16161616; + case DRM_FORMAT_RGB565: + return &argb_u16_to_RGB565; + default: + return NULL; + } +} diff --git a/drivers/gpu/drm/vkms/vkms_formats.h b/drivers/gpu/drm/vkms/vkms_formats.h new file mode 100644 index 000000000..c5b113495 --- /dev/null +++ b/drivers/gpu/drm/vkms/vkms_formats.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ + +#ifndef _VKMS_FORMATS_H_ +#define _VKMS_FORMATS_H_ + +#include "vkms_drv.h" + +void *get_pixel_conversion_function(u32 format); + +void *get_line_to_frame_function(u32 format); + +#endif /* _VKMS_FORMATS_H_ */ diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c new file mode 100644 index 000000000..991857125 --- /dev/null +++ b/drivers/gpu/drm/vkms/vkms_output.c @@ -0,0 +1,127 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include "vkms_drv.h" +#include <drm/drm_atomic_helper.h> +#include <drm/drm_edid.h> +#include <drm/drm_probe_helper.h> +#include <drm/drm_simple_kms_helper.h> + +static void vkms_connector_destroy(struct drm_connector *connector) +{ + drm_connector_cleanup(connector); +} + +static const struct drm_connector_funcs vkms_connector_funcs = { + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = vkms_connector_destroy, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static int vkms_conn_get_modes(struct drm_connector *connector) +{ + int count; + + count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX); + drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF); + + return count; +} + +static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = { + .get_modes = vkms_conn_get_modes, +}; + +static int vkms_add_overlay_plane(struct vkms_device *vkmsdev, int index, + struct drm_crtc *crtc) +{ + struct vkms_plane *overlay; + + overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY, index); + if (IS_ERR(overlay)) + return PTR_ERR(overlay); + + if (!overlay->base.possible_crtcs) + overlay->base.possible_crtcs = drm_crtc_mask(crtc); + + return 0; +} + +int vkms_output_init(struct vkms_device *vkmsdev, int index) +{ + struct vkms_output *output = &vkmsdev->output; + struct drm_device *dev = &vkmsdev->drm; + struct drm_connector *connector = &output->connector; + struct drm_encoder *encoder = &output->encoder; + struct drm_crtc *crtc = &output->crtc; + struct vkms_plane *primary, *cursor = NULL; + int ret; + int writeback; + unsigned int n; + + primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY, index); + if (IS_ERR(primary)) + return PTR_ERR(primary); + + if (vkmsdev->config->overlay) { + for (n = 0; n < NUM_OVERLAY_PLANES; n++) { + ret = vkms_add_overlay_plane(vkmsdev, index, crtc); + if (ret) + return ret; + } + } + + if (vkmsdev->config->cursor) { + cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, index); + if (IS_ERR(cursor)) + return PTR_ERR(cursor); + } + + ret = vkms_crtc_init(dev, crtc, &primary->base, &cursor->base); + if (ret) + return ret; + + ret = drm_connector_init(dev, connector, &vkms_connector_funcs, + DRM_MODE_CONNECTOR_VIRTUAL); + if (ret) { + DRM_ERROR("Failed to init connector\n"); + goto err_connector; + } + + drm_connector_helper_add(connector, &vkms_conn_helper_funcs); + + ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_VIRTUAL); + if (ret) { + DRM_ERROR("Failed to init encoder\n"); + goto err_encoder; + } + encoder->possible_crtcs = 1; + + ret = drm_connector_attach_encoder(connector, encoder); + if (ret) { + DRM_ERROR("Failed to attach connector to encoder\n"); + goto err_attach; + } + + if (vkmsdev->config->writeback) { + writeback = vkms_enable_writeback_connector(vkmsdev); + if (writeback) + DRM_ERROR("Failed to init writeback connector\n"); + } + + drm_mode_config_reset(dev); + + return 0; + +err_attach: + drm_encoder_cleanup(encoder); + +err_encoder: + drm_connector_cleanup(connector); + +err_connector: + drm_crtc_cleanup(crtc); + + return ret; +} diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c new file mode 100644 index 000000000..80e964589 --- /dev/null +++ b/drivers/gpu/drm/vkms/vkms_plane.c @@ -0,0 +1,207 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include <linux/iosys-map.h> + +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_fourcc.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_gem_framebuffer_helper.h> + +#include "vkms_drv.h" +#include "vkms_formats.h" + +static const u32 vkms_formats[] = { + DRM_FORMAT_XRGB8888, + DRM_FORMAT_XRGB16161616, + DRM_FORMAT_RGB565 +}; + +static const u32 vkms_plane_formats[] = { + DRM_FORMAT_ARGB8888, + DRM_FORMAT_XRGB8888, + DRM_FORMAT_XRGB16161616, + DRM_FORMAT_ARGB16161616, + DRM_FORMAT_RGB565 +}; + +static struct drm_plane_state * +vkms_plane_duplicate_state(struct drm_plane *plane) +{ + struct vkms_plane_state *vkms_state; + struct vkms_frame_info *frame_info; + + vkms_state = kzalloc(sizeof(*vkms_state), GFP_KERNEL); + if (!vkms_state) + return NULL; + + frame_info = kzalloc(sizeof(*frame_info), GFP_KERNEL); + if (!frame_info) { + DRM_DEBUG_KMS("Couldn't allocate frame_info\n"); + kfree(vkms_state); + return NULL; + } + + vkms_state->frame_info = frame_info; + + __drm_gem_duplicate_shadow_plane_state(plane, &vkms_state->base); + + return &vkms_state->base.base; +} + +static void vkms_plane_destroy_state(struct drm_plane *plane, + struct drm_plane_state *old_state) +{ + struct vkms_plane_state *vkms_state = to_vkms_plane_state(old_state); + struct drm_crtc *crtc = vkms_state->base.base.crtc; + + if (crtc && vkms_state->frame_info->fb) { + /* dropping the reference we acquired in + * vkms_primary_plane_update() + */ + if (drm_framebuffer_read_refcount(vkms_state->frame_info->fb)) + drm_framebuffer_put(vkms_state->frame_info->fb); + } + + kfree(vkms_state->frame_info); + vkms_state->frame_info = NULL; + + __drm_gem_destroy_shadow_plane_state(&vkms_state->base); + kfree(vkms_state); +} + +static void vkms_plane_reset(struct drm_plane *plane) +{ + struct vkms_plane_state *vkms_state; + + if (plane->state) { + vkms_plane_destroy_state(plane, plane->state); + plane->state = NULL; /* must be set to NULL here */ + } + + vkms_state = kzalloc(sizeof(*vkms_state), GFP_KERNEL); + if (!vkms_state) { + DRM_ERROR("Cannot allocate vkms_plane_state\n"); + return; + } + + __drm_gem_reset_shadow_plane(plane, &vkms_state->base); +} + +static const struct drm_plane_funcs vkms_plane_funcs = { + .update_plane = drm_atomic_helper_update_plane, + .disable_plane = drm_atomic_helper_disable_plane, + .reset = vkms_plane_reset, + .atomic_duplicate_state = vkms_plane_duplicate_state, + .atomic_destroy_state = vkms_plane_destroy_state, +}; + +static void vkms_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 vkms_plane_state *vkms_plane_state; + struct drm_shadow_plane_state *shadow_plane_state; + struct drm_framebuffer *fb = new_state->fb; + struct vkms_frame_info *frame_info; + u32 fmt; + + if (!new_state->crtc || !fb) + return; + + fmt = fb->format->format; + vkms_plane_state = to_vkms_plane_state(new_state); + shadow_plane_state = &vkms_plane_state->base; + + frame_info = vkms_plane_state->frame_info; + memcpy(&frame_info->src, &new_state->src, sizeof(struct drm_rect)); + memcpy(&frame_info->dst, &new_state->dst, sizeof(struct drm_rect)); + frame_info->fb = fb; + memcpy(&frame_info->map, &shadow_plane_state->data, sizeof(frame_info->map)); + drm_framebuffer_get(frame_info->fb); + frame_info->offset = fb->offsets[0]; + frame_info->pitch = fb->pitches[0]; + frame_info->cpp = fb->format->cpp[0]; + vkms_plane_state->pixel_read = get_pixel_conversion_function(fmt); +} + +static int vkms_plane_atomic_check(struct drm_plane *plane, + struct drm_atomic_state *state) +{ + struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, + plane); + struct drm_crtc_state *crtc_state; + bool can_position = false; + int ret; + + if (!new_plane_state->fb || WARN_ON(!new_plane_state->crtc)) + return 0; + + crtc_state = drm_atomic_get_crtc_state(state, + new_plane_state->crtc); + if (IS_ERR(crtc_state)) + return PTR_ERR(crtc_state); + + if (plane->type != DRM_PLANE_TYPE_PRIMARY) + can_position = true; + + ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state, + DRM_PLANE_NO_SCALING, + DRM_PLANE_NO_SCALING, + can_position, true); + if (ret != 0) + return ret; + + /* for now primary plane must be visible and full screen */ + if (!new_plane_state->visible && !can_position) + return -EINVAL; + + return 0; +} + +static const struct drm_plane_helper_funcs vkms_primary_helper_funcs = { + .atomic_update = vkms_plane_atomic_update, + .atomic_check = vkms_plane_atomic_check, + DRM_GEM_SHADOW_PLANE_HELPER_FUNCS, +}; + +struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev, + enum drm_plane_type type, int index) +{ + struct drm_device *dev = &vkmsdev->drm; + const struct drm_plane_helper_funcs *funcs; + struct vkms_plane *plane; + const u32 *formats; + int nformats; + + switch (type) { + case DRM_PLANE_TYPE_PRIMARY: + formats = vkms_formats; + nformats = ARRAY_SIZE(vkms_formats); + funcs = &vkms_primary_helper_funcs; + break; + case DRM_PLANE_TYPE_CURSOR: + case DRM_PLANE_TYPE_OVERLAY: + formats = vkms_plane_formats; + nformats = ARRAY_SIZE(vkms_plane_formats); + funcs = &vkms_primary_helper_funcs; + break; + default: + formats = vkms_formats; + nformats = ARRAY_SIZE(vkms_formats); + funcs = &vkms_primary_helper_funcs; + break; + } + + plane = drmm_universal_plane_alloc(dev, struct vkms_plane, base, 1 << index, + &vkms_plane_funcs, + formats, nformats, + NULL, type, NULL); + if (IS_ERR(plane)) + return plane; + + drm_plane_helper_add(&plane->base, funcs); + + return plane; +} diff --git a/drivers/gpu/drm/vkms/vkms_writeback.c b/drivers/gpu/drm/vkms/vkms_writeback.c new file mode 100644 index 000000000..84a51cd28 --- /dev/null +++ b/drivers/gpu/drm/vkms/vkms_writeback.c @@ -0,0 +1,175 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include <linux/iosys-map.h> + +#include <drm/drm_atomic.h> +#include <drm/drm_edid.h> +#include <drm/drm_fourcc.h> +#include <drm/drm_writeback.h> +#include <drm/drm_probe_helper.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_gem_framebuffer_helper.h> +#include <drm/drm_gem_shmem_helper.h> + +#include "vkms_drv.h" +#include "vkms_formats.h" + +static const u32 vkms_wb_formats[] = { + DRM_FORMAT_XRGB8888, + DRM_FORMAT_XRGB16161616, + DRM_FORMAT_ARGB16161616, + DRM_FORMAT_RGB565 +}; + +static const struct drm_connector_funcs vkms_wb_connector_funcs = { + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = drm_connector_cleanup, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static int vkms_wb_encoder_atomic_check(struct drm_encoder *encoder, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + struct drm_framebuffer *fb; + const struct drm_display_mode *mode = &crtc_state->mode; + int ret; + + if (!conn_state->writeback_job || !conn_state->writeback_job->fb) + return 0; + + fb = conn_state->writeback_job->fb; + if (fb->width != mode->hdisplay || fb->height != mode->vdisplay) { + DRM_DEBUG_KMS("Invalid framebuffer size %ux%u\n", + fb->width, fb->height); + return -EINVAL; + } + + ret = drm_atomic_helper_check_wb_encoder_state(encoder, conn_state); + if (ret < 0) + return ret; + + return 0; +} + +static const struct drm_encoder_helper_funcs vkms_wb_encoder_helper_funcs = { + .atomic_check = vkms_wb_encoder_atomic_check, +}; + +static int vkms_wb_connector_get_modes(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + + return drm_add_modes_noedid(connector, dev->mode_config.max_width, + dev->mode_config.max_height); +} + +static int vkms_wb_prepare_job(struct drm_writeback_connector *wb_connector, + struct drm_writeback_job *job) +{ + struct vkms_writeback_job *vkmsjob; + int ret; + + if (!job->fb) + return 0; + + vkmsjob = kzalloc(sizeof(*vkmsjob), GFP_KERNEL); + if (!vkmsjob) + return -ENOMEM; + + ret = drm_gem_fb_vmap(job->fb, vkmsjob->wb_frame_info.map, vkmsjob->data); + if (ret) { + DRM_ERROR("vmap failed: %d\n", ret); + goto err_kfree; + } + + vkmsjob->wb_frame_info.fb = job->fb; + drm_framebuffer_get(vkmsjob->wb_frame_info.fb); + + job->priv = vkmsjob; + + return 0; + +err_kfree: + kfree(vkmsjob); + return ret; +} + +static void vkms_wb_cleanup_job(struct drm_writeback_connector *connector, + struct drm_writeback_job *job) +{ + struct vkms_writeback_job *vkmsjob = job->priv; + struct vkms_device *vkmsdev; + + if (!job->fb) + return; + + drm_gem_fb_vunmap(job->fb, vkmsjob->wb_frame_info.map); + + drm_framebuffer_put(vkmsjob->wb_frame_info.fb); + + vkmsdev = drm_device_to_vkms_device(job->fb->dev); + vkms_set_composer(&vkmsdev->output, false); + kfree(vkmsjob); +} + +static void vkms_wb_atomic_commit(struct drm_connector *conn, + struct drm_atomic_state *state) +{ + struct drm_connector_state *connector_state = drm_atomic_get_new_connector_state(state, + conn); + struct vkms_device *vkmsdev = drm_device_to_vkms_device(conn->dev); + struct vkms_output *output = &vkmsdev->output; + struct drm_writeback_connector *wb_conn = &output->wb_connector; + struct drm_connector_state *conn_state = wb_conn->base.state; + struct vkms_crtc_state *crtc_state = output->composer_state; + struct drm_framebuffer *fb = connector_state->writeback_job->fb; + u16 crtc_height = crtc_state->base.crtc->mode.vdisplay; + u16 crtc_width = crtc_state->base.crtc->mode.hdisplay; + struct vkms_writeback_job *active_wb; + struct vkms_frame_info *wb_frame_info; + u32 wb_format = fb->format->format; + + if (!conn_state) + return; + + vkms_set_composer(&vkmsdev->output, true); + + active_wb = conn_state->writeback_job->priv; + wb_frame_info = &active_wb->wb_frame_info; + + spin_lock_irq(&output->composer_lock); + crtc_state->active_writeback = active_wb; + wb_frame_info->offset = fb->offsets[0]; + wb_frame_info->pitch = fb->pitches[0]; + wb_frame_info->cpp = fb->format->cpp[0]; + crtc_state->wb_pending = true; + spin_unlock_irq(&output->composer_lock); + drm_writeback_queue_job(wb_conn, connector_state); + active_wb->wb_write = get_line_to_frame_function(wb_format); + drm_rect_init(&wb_frame_info->src, 0, 0, crtc_width, crtc_height); + drm_rect_init(&wb_frame_info->dst, 0, 0, crtc_width, crtc_height); +} + +static const struct drm_connector_helper_funcs vkms_wb_conn_helper_funcs = { + .get_modes = vkms_wb_connector_get_modes, + .prepare_writeback_job = vkms_wb_prepare_job, + .cleanup_writeback_job = vkms_wb_cleanup_job, + .atomic_commit = vkms_wb_atomic_commit, +}; + +int vkms_enable_writeback_connector(struct vkms_device *vkmsdev) +{ + struct drm_writeback_connector *wb = &vkmsdev->output.wb_connector; + + drm_connector_helper_add(&wb->base, &vkms_wb_conn_helper_funcs); + + return drm_writeback_connector_init(&vkmsdev->drm, wb, + &vkms_wb_connector_funcs, + &vkms_wb_encoder_helper_funcs, + vkms_wb_formats, + ARRAY_SIZE(vkms_wb_formats), + 1); +} |