Re: [PATCH v5 2/7] drm/vkms: Support multiple DRM objects (crtcs, etc.) per VKMS device

Marius Vlad
2023-08-28T14:08:34Z

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Hi Brandon,

See a bottom comment about writeback connectors creation/initalization.

On Mon, Aug 28, 2023 at 08:17:04AM +0000, Brandon Pollack wrote:
> From: Jim Shargo <jshargo@chromium.org>
>
> This change supports multiple CRTCs, encoders, connectors instead of one
> of each per device.
>
> Since ConfigFS-based devices will support multiple crtcs, it's useful to
> move all of the writeback/composition data from being per-"output" to
> being per-CRTC.
>
> Since there's still only ever one CRTC, this should be a no-op refactor.
>
> Signed-off-by: Jim Shargo <jshargo@chromium.org>
> Signed-off-by: Brandon Pollack <brpol@chromium.org>
> ---
> drivers/gpu/drm/vkms/vkms_composer.c | 30 +++----
> drivers/gpu/drm/vkms/vkms_crtc.c | 100 ++++++++++++---------
> drivers/gpu/drm/vkms/vkms_drv.c | 12 +--
> drivers/gpu/drm/vkms/vkms_drv.h | 70 +++++++++------
> drivers/gpu/drm/vkms/vkms_output.c | 122 ++++++++++++++++++--------
> drivers/gpu/drm/vkms/vkms_plane.c | 38 ++++++--
> drivers/gpu/drm/vkms/vkms_writeback.c | 31 +++----
> 7 files changed, 256 insertions(+), 147 deletions(-)
>
> diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c
> index d5d4f642d367..a59eb75a21c4 100644
> --- a/drivers/gpu/drm/vkms/vkms_composer.c
> +++ b/drivers/gpu/drm/vkms/vkms_composer.c
> @@ -300,13 +300,13 @@ void vkms_composer_worker(struct work_struct *work)
> 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);
> + struct vkms_crtc *vkms_crtc = drm_crtc_to_vkms_crtc(crtc);
> bool crc_pending, wb_pending;
> u64 frame_start, frame_end;
> u32 crc32 = 0;
> int ret;
>
> - spin_lock_irq(&out->composer_lock);
> + spin_lock_irq(&vkms_crtc->composer_lock);
> frame_start = crtc_state->frame_start;
> frame_end = crtc_state->frame_end;
> crc_pending = crtc_state->crc_pending;
> @@ -330,7 +330,7 @@ void vkms_composer_worker(struct work_struct *work)
> crtc_state->gamma_lut.base = NULL;
> }
>
> - spin_unlock_irq(&out->composer_lock);
> + spin_unlock_irq(&vkms_crtc->composer_lock);
>
> /*
> * We raced with the vblank hrtimer and previous work already computed
> @@ -348,10 +348,10 @@ void vkms_composer_worker(struct work_struct *work)
> return;
>
> if (wb_pending) {
> - drm_writeback_signal_completion(&out->wb_connector, 0);
> - spin_lock_irq(&out->composer_lock);
> + drm_writeback_signal_completion(&vkms_crtc->wb_connector, 0);
> + spin_lock_irq(&vkms_crtc->composer_lock);
> crtc_state->wb_pending = false;
> - spin_unlock_irq(&out->composer_lock);
> + spin_unlock_irq(&vkms_crtc->composer_lock);
> }
>
> /*
> @@ -401,30 +401,30 @@ int vkms_verify_crc_source(struct drm_crtc *crtc, const char *src_name,
> return 0;
> }
>
> -void vkms_set_composer(struct vkms_output *out, bool enabled)
> +void vkms_set_composer(struct vkms_crtc *vkms_crtc, bool enabled)
> {
> bool old_enabled;
>
> if (enabled)
> - drm_crtc_vblank_get(&out->crtc);
> + drm_crtc_vblank_get(&vkms_crtc->base);
>
> - mutex_lock(&out->enabled_lock);
> - old_enabled = out->composer_enabled;
> - out->composer_enabled = enabled;
> + mutex_lock(&vkms_crtc->enabled_lock);
> + old_enabled = vkms_crtc->composer_enabled;
> + vkms_crtc->composer_enabled = enabled;
>
> /* the composition wasn't enabled, so unlock the lock to make sure the lock
> * will be balanced even if we have a failed commit
> */
> - if (!out->composer_enabled)
> - mutex_unlock(&out->enabled_lock);
> + if (!vkms_crtc->composer_enabled)
> + mutex_unlock(&vkms_crtc->enabled_lock);
>
> if (old_enabled)
> - drm_crtc_vblank_put(&out->crtc);
> + drm_crtc_vblank_put(&vkms_crtc->base);
> }
>
> int vkms_set_crc_source(struct drm_crtc *crtc, const char *src_name)
> {
> - struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
> + struct vkms_crtc *out = drm_crtc_to_vkms_crtc(crtc);
> bool enabled = false;
> int ret = 0;
>
> diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
> index 3c5ebf106b66..74bbd675464b 100644
> --- a/drivers/gpu/drm/vkms/vkms_crtc.c
> +++ b/drivers/gpu/drm/vkms/vkms_crtc.c
> @@ -1,5 +1,6 @@
> // SPDX-License-Identifier: GPL-2.0+
>
> +#include "linux/mutex.h"
> #include <linux/dma-fence.h>
>
> #include <drm/drm_atomic.h>
> @@ -11,17 +12,16 @@
>
> 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 *vkms_crtc = timer_to_vkms_crtc(timer);
> + struct drm_crtc *crtc = &vkms_crtc->base;
> struct vkms_crtc_state *state;
> u64 ret_overrun;
> bool ret, fence_cookie, composer_enabled;
>
> fence_cookie = dma_fence_begin_signalling();
>
> - ret_overrun = hrtimer_forward_now(&output->vblank_hrtimer,
> - output->period_ns);
> + ret_overrun = hrtimer_forward_now(&vkms_crtc->vblank_hrtimer,
> + vkms_crtc->period_ns);
> if (ret_overrun != 1)
> pr_warn("%s: vblank timer overrun\n", __func__);
>
> @@ -29,9 +29,9 @@ static enum hrtimer_restart vkms_vblank_simulate(struct hrtimer *timer)
> if (!ret)
> DRM_ERROR("vkms failure on handling vblank");
>
> - state = output->composer_state;
> - composer_enabled = output->composer_enabled;
> - mutex_unlock(&output->enabled_lock);
> + state = vkms_crtc->composer_state;
> + composer_enabled = vkms_crtc->composer_enabled;
> + mutex_unlock(&vkms_crtc->enabled_lock);
>
> if (state && composer_enabled) {
> u64 frame = drm_crtc_accurate_vblank_count(crtc);
> @@ -39,7 +39,7 @@ static enum hrtimer_restart vkms_vblank_simulate(struct hrtimer *timer)
> /* update frame_start only if a queued vkms_composer_worker()
> * has read the data
> */
> - spin_lock(&output->composer_lock);
> + spin_lock(&vkms_crtc->composer_lock);
> if (!state->crc_pending)
> state->frame_start = frame;
> else
> @@ -47,9 +47,10 @@ static enum hrtimer_restart vkms_vblank_simulate(struct hrtimer *timer)
> state->frame_start, frame);
> state->frame_end = frame;
> state->crc_pending = true;
> - spin_unlock(&output->composer_lock);
> + spin_unlock(&vkms_crtc->composer_lock);
>
> - ret = queue_work(output->composer_workq, &state->composer_work);
> + ret = queue_work(vkms_crtc->composer_workq,
> + &state->composer_work);
> if (!ret)
> DRM_DEBUG_DRIVER("Composer worker already queued\n");
> }
> @@ -62,25 +63,27 @@ static enum hrtimer_restart vkms_vblank_simulate(struct hrtimer *timer)
> static int vkms_enable_vblank(struct drm_crtc *crtc)
> {
> struct drm_device *dev = crtc->dev;
> + struct vkms_crtc *vkms_crtc = drm_crtc_to_vkms_crtc(crtc);
> 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);
> + hrtimer_init(&vkms_crtc->vblank_hrtimer, CLOCK_MONOTONIC,
> + HRTIMER_MODE_REL);
> + vkms_crtc->vblank_hrtimer.function = &vkms_vblank_simulate;
> + vkms_crtc->period_ns = ktime_set(0, vblank->framedur_ns);
> + hrtimer_start(&vkms_crtc->vblank_hrtimer, vkms_crtc->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);
> + struct vkms_crtc *vkms_crtc = drm_crtc_to_vkms_crtc(crtc);
>
> - hrtimer_cancel(&out->vblank_hrtimer);
> + hrtimer_cancel(&vkms_crtc->vblank_hrtimer);
> }
>
> static bool vkms_get_vblank_timestamp(struct drm_crtc *crtc,
> @@ -88,9 +91,8 @@ static bool vkms_get_vblank_timestamp(struct drm_crtc *crtc,
> bool in_vblank_irq)
> {
> struct drm_device *dev = crtc->dev;
> + struct vkms_crtc *vkms_crtc = drm_crtc_to_vkms_crtc(crtc);
> 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)) {
> @@ -98,7 +100,7 @@ static bool vkms_get_vblank_timestamp(struct drm_crtc *crtc,
> return true;
> }
>
> - *vblank_time = READ_ONCE(output->vblank_hrtimer.node.expires);
> + *vblank_time = READ_ONCE(vkms_crtc->vblank_hrtimer.node.expires);
>
> if (WARN_ON(*vblank_time == vblank->time))
> return true;
> @@ -110,7 +112,7 @@ static bool vkms_get_vblank_timestamp(struct drm_crtc *crtc,
> * the vblank core expects. Therefore we need to always correct the
> * timestampe by one frame.
> */
> - *vblank_time -= output->period_ns;
> + *vblank_time -= vkms_crtc->period_ns;
>
> return true;
> }
> @@ -236,18 +238,18 @@ static void vkms_crtc_atomic_disable(struct drm_crtc *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);
> + struct vkms_crtc *vkms_crtc = drm_crtc_to_vkms_crtc(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);
> + spin_lock_irq(&vkms_crtc->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);
> + struct vkms_crtc *vkms_crtc = drm_crtc_to_vkms_crtc(crtc);
>
> if (crtc->state->event) {
> spin_lock(&crtc->dev->event_lock);
> @@ -262,9 +264,9 @@ static void vkms_crtc_atomic_flush(struct drm_crtc *crtc,
> crtc->state->event = NULL;
> }
>
> - vkms_output->composer_state = to_vkms_crtc_state(crtc->state);
> + vkms_crtc->composer_state = to_vkms_crtc_state(crtc->state);
>
> - spin_unlock_irq(&vkms_output->lock);
> + spin_unlock_irq(&vkms_crtc->lock);
> }
>
> static const struct drm_crtc_helper_funcs vkms_crtc_helper_funcs = {
> @@ -275,31 +277,45 @@ static const struct drm_crtc_helper_funcs vkms_crtc_helper_funcs = {
> .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_crtc *vkms_crtc_init(struct vkms_device *vkmsdev,
> + struct drm_plane *primary,
> + struct drm_plane *cursor)
> {
> - struct vkms_output *vkms_out = drm_crtc_to_vkms_output(crtc);
> + struct drm_device *dev = &vkmsdev->drm;
> + struct vkms_crtc *vkms_crtc;
> int ret;
>
> - ret = drmm_crtc_init_with_planes(dev, crtc, primary, cursor,
> + if (vkmsdev->output.num_crtcs >= VKMS_MAX_OUTPUT_OBJECTS)
> + return ERR_PTR(-ENOMEM);
> +
> + vkms_crtc = &vkmsdev->output.crtcs[vkmsdev->output.num_crtcs++];
> +
> + ret = drmm_crtc_init_with_planes(dev, &vkms_crtc->base, primary, cursor,
> &vkms_crtc_funcs, NULL);
> if (ret) {
> DRM_ERROR("Failed to init CRTC\n");
> - return ret;
> + goto out_error;
> }
>
> - drm_crtc_helper_add(crtc, &vkms_crtc_helper_funcs);
> + drm_crtc_helper_add(&vkms_crtc->base, &vkms_crtc_helper_funcs);
>
> - drm_mode_crtc_set_gamma_size(crtc, VKMS_LUT_SIZE);
> - drm_crtc_enable_color_mgmt(crtc, 0, false, VKMS_LUT_SIZE);
> + drm_mode_crtc_set_gamma_size(&vkms_crtc->base, VKMS_LUT_SIZE);
> + drm_crtc_enable_color_mgmt(&vkms_crtc->base, 0, false, VKMS_LUT_SIZE);
>
> - spin_lock_init(&vkms_out->lock);
> - spin_lock_init(&vkms_out->composer_lock);
> - mutex_init(&vkms_out->enabled_lock);
> + spin_lock_init(&vkms_crtc->lock);
> + spin_lock_init(&vkms_crtc->composer_lock);
> + mutex_init(&vkms_crtc->enabled_lock);
>
> - vkms_out->composer_workq = alloc_ordered_workqueue("vkms_composer", 0);
> - if (!vkms_out->composer_workq)
> - return -ENOMEM;
> + vkms_crtc->composer_workq = alloc_ordered_workqueue("vkms_composer", 0);
> + if (!vkms_crtc->composer_workq) {
> + ret = -ENOMEM;
> + goto out_error;
> + }
> +
> + return vkms_crtc;
>
> - return ret;
> +out_error:
> + memset(vkms_crtc, 0, sizeof(*vkms_crtc));
> + vkmsdev->output.num_crtcs -= 1;
> + return ERR_PTR(ret);
> }
> diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
> index 387c832f5dc9..65b1e2c52106 100644
> --- a/drivers/gpu/drm/vkms/vkms_drv.c
> +++ b/drivers/gpu/drm/vkms/vkms_drv.c
> @@ -57,8 +57,8 @@ 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);
> + for (int i = 0; i < vkms->output.num_crtcs; i++)
> + destroy_workqueue(vkms->output.crtcs[i].composer_workq);
> }
>
> static void vkms_atomic_commit_tail(struct drm_atomic_state *old_state)
> @@ -203,15 +203,15 @@ static int vkms_platform_probe(struct platform_device *pdev)
> goto out_release_group;
> }
>
> - ret = drm_vblank_init(&vkms_device->drm, 1);
> + ret = vkms_modeset_init(vkms_device);
> if (ret) {
> - DRM_ERROR("Failed to vblank\n");
> + DRM_ERROR("Unable to initialize modesetting\n");
> goto out_release_group;
> }
>
> - ret = vkms_modeset_init(vkms_device);
> + ret = drm_vblank_init(&vkms_device->drm, vkms_device->output.num_crtcs);
> if (ret) {
> - DRM_ERROR("Unable to initialize modesetting\n");
> + DRM_ERROR("Failed to vblank\n");
> goto out_release_group;
> }
>
> diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
> index 4c35d6305f2a..761cd809617e 100644
> --- a/drivers/gpu/drm/vkms/vkms_drv.h
> +++ b/drivers/gpu/drm/vkms/vkms_drv.h
> @@ -23,6 +23,10 @@
>
> #define NUM_OVERLAY_PLANES 8
>
> +
> +#define VKMS_MAX_OUTPUT_OBJECTS 16
> +#define VKMS_MAX_PLANES (3 * VKMS_MAX_OUTPUT_OBJECTS)
> +
> #define VKMS_LUT_SIZE 256
>
> struct vkms_frame_info {
> @@ -66,6 +70,27 @@ struct vkms_plane {
> struct drm_plane base;
> };
>
> +struct vkms_crtc {
> + struct drm_crtc base;
> +
> + 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;
> + /* guarantees that if the composer is enabled, a job will be queued */
> + struct mutex enabled_lock;
> +
> + /* protected by @enabled_lock */
> + bool composer_enabled;
> + struct vkms_crtc_state *composer_state;
> +
> + spinlock_t composer_lock;
> +};
> +
> struct vkms_color_lut {
> struct drm_color_lut *base;
> size_t lut_length;
> @@ -97,25 +122,14 @@ struct vkms_crtc_state {
> };
>
> 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;
> - /* guarantees that if the composer is enabled, a job will be queued */
> - struct mutex enabled_lock;
> -
> - /* protected by @enabled_lock */
> - bool composer_enabled;
> - struct vkms_crtc_state *composer_state;
> -
> - spinlock_t composer_lock;
> + int num_crtcs;
> + struct vkms_crtc crtcs[VKMS_MAX_OUTPUT_OBJECTS];
> + int num_encoders;
> + struct drm_encoder encoders[VKMS_MAX_OUTPUT_OBJECTS];
> + int num_connectors;
> + struct drm_connector connectors[VKMS_MAX_OUTPUT_OBJECTS];
> + int num_planes;
> + struct vkms_plane planes[VKMS_MAX_PLANES];
> };
>
> struct vkms_device;
> @@ -133,12 +147,14 @@ struct vkms_device {
> struct vkms_config config;
> };
>
> -#define drm_crtc_to_vkms_output(target) \
> - container_of(target, struct vkms_output, crtc)
> +#define drm_crtc_to_vkms_crtc(crtc) container_of(crtc, struct vkms_crtc, base)
>
> #define drm_device_to_vkms_device(target) \
> container_of(target, struct vkms_device, drm)
>
> +#define timer_to_vkms_crtc(timer) \
> + container_of(timer, struct vkms_crtc, vblank_hrtimer)
> +
> #define to_vkms_crtc_state(target)\
> container_of(target, struct vkms_crtc_state, base)
>
> @@ -146,13 +162,14 @@ struct vkms_device {
> 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);
> +struct vkms_crtc *vkms_crtc_init(struct vkms_device *vkmsdev,
> + 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);
> + enum drm_plane_type type);
>
> /* CRC Support */
> const char *const *vkms_get_crc_sources(struct drm_crtc *crtc,
> @@ -163,11 +180,12 @@ int vkms_verify_crc_source(struct drm_crtc *crtc, const char *source_name,
>
> /* Composer Support */
> void vkms_composer_worker(struct work_struct *work);
> -void vkms_set_composer(struct vkms_output *out, bool enabled);
> +void vkms_set_composer(struct vkms_crtc *vkms_crtc, bool enabled);
> void vkms_compose_row(struct line_buffer *stage_buffer, struct vkms_plane_state *plane, int y);
> void vkms_writeback_row(struct vkms_writeback_job *wb, const struct line_buffer *src_buffer, int y);
>
> /* Writeback */
> -int vkms_enable_writeback_connector(struct vkms_device *vkmsdev);
> +int vkms_enable_writeback_connector(struct vkms_device *vkmsdev,
> + struct vkms_crtc *vkms_crtc);
>
> #endif /* _VKMS_DRV_H_ */
> diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
> index 963a64cf068b..86faf94f7408 100644
> --- a/drivers/gpu/drm/vkms/vkms_output.c
> +++ b/drivers/gpu/drm/vkms/vkms_output.c
> @@ -1,9 +1,13 @@
> // SPDX-License-Identifier: GPL-2.0+
>
> -#include "vkms_drv.h"
> #include <drm/drm_atomic_helper.h>
> +#include <drm/drm_connector.h>
> #include <drm/drm_edid.h>
> +#include <drm/drm_encoder.h>
> #include <drm/drm_probe_helper.h>
> +#include <drm/drm_simple_kms_helper.h>
> +
> +#include "vkms_drv.h"
>
> static const struct drm_connector_funcs vkms_connector_funcs = {
> .fill_modes = drm_helper_probe_single_connector_modes,
> @@ -28,74 +32,116 @@ static int vkms_conn_get_modes(struct drm_connector *connector)
> }
>
> static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = {
> - .get_modes = vkms_conn_get_modes,
> + .get_modes = vkms_conn_get_modes,
> };
>
> -static int vkms_add_overlay_plane(struct vkms_device *vkmsdev, int index,
> - struct drm_crtc *crtc)
> +static struct drm_connector *
> +vkms_connector_init(struct vkms_device *vkms_device)
> {
> - struct vkms_plane *overlay;
> + struct drm_connector *connector;
> + int ret;
>
> - overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY, index);
> - if (IS_ERR(overlay))
> - return PTR_ERR(overlay);
> + if (vkms_device->output.num_connectors >= VKMS_MAX_OUTPUT_OBJECTS)
> + return ERR_PTR(-ENOMEM);
>
> - if (!overlay->base.possible_crtcs)
> - overlay->base.possible_crtcs = drm_crtc_mask(crtc);
> + connector = &vkms_device->output
> + .connectors[vkms_device->output.num_connectors++];
> + ret = drm_connector_init(&vkms_device->drm, connector,
> + &vkms_connector_funcs,
> + DRM_MODE_CONNECTOR_VIRTUAL);
> + if (ret) {
> + memset(connector, 0, sizeof(*connector));
> + vkms_device->output.num_connectors -= 1;
> + return ERR_PTR(ret);
> + }
>
> - return 0;
> + drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
> +
> + return connector;
> +}
> +
> +static struct drm_encoder *vkms_encoder_init(struct vkms_device *vkms_device)
> +{
> + struct drm_encoder *encoder;
> + int ret;
> +
> + if (vkms_device->output.num_encoders >= VKMS_MAX_OUTPUT_OBJECTS)
> + return ERR_PTR(-ENOMEM);
> +
> + encoder = &vkms_device->output
> + .encoders[vkms_device->output.num_encoders++];
> + ret = drm_encoder_init(&vkms_device->drm, encoder, &vkms_encoder_funcs,
> + DRM_MODE_ENCODER_VIRTUAL, NULL);
> + if (ret) {
> + memset(encoder, 0, sizeof(*encoder));
> + vkms_device->output.num_encoders -= 1;
> + return ERR_PTR(ret);
> + }
> + return encoder;
> }
>
> 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 drm_connector *connector;
> + struct drm_encoder *encoder;
> + struct vkms_crtc *vkms_crtc;
> struct vkms_plane *primary, *cursor = NULL;
> int ret;
> int writeback;
> unsigned int n;
>
> - primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY, index);
> + primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY);
> 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;
> + struct vkms_plane *overlay = vkms_plane_init(
> + vkmsdev, DRM_PLANE_TYPE_OVERLAY);
> + if (IS_ERR(overlay)) {
> + ret = PTR_ERR(overlay);
> + goto err_planes;
> + }
> }
> }
>
> if (vkmsdev->config.cursor) {
> - cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, index);
> - if (IS_ERR(cursor))
> - return PTR_ERR(cursor);
> + cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR);
> + if (IS_ERR(cursor)) {
> + ret = PTR_ERR(cursor);
> + goto err_planes;
> + }
> }
>
> - ret = vkms_crtc_init(dev, crtc, &primary->base, &cursor->base);
> - if (ret)
> - return ret;
> + vkms_crtc = vkms_crtc_init(vkmsdev, &primary->base,
> + cursor ? &cursor->base : NULL);
> + if (IS_ERR(vkms_crtc)) {
> + DRM_ERROR("Failed to init crtc\n");
> + ret = PTR_ERR(vkms_crtc);
> + goto err_planes;
> + }
>
> - ret = drm_connector_init(dev, connector, &vkms_connector_funcs,
> - DRM_MODE_CONNECTOR_VIRTUAL);
> - if (ret) {
> + for (int i = 0; i < vkmsdev->output.num_planes; i++) {
> + vkmsdev->output.planes[i].base.possible_crtcs |=
> + drm_crtc_mask(&vkms_crtc->base);
> + }
> +
> + connector = vkms_connector_init(vkmsdev);
> + if (IS_ERR(connector)) {
> DRM_ERROR("Failed to init connector\n");
> + ret = PTR_ERR(connector);
> goto err_connector;
> }
>
> - drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
> -
> - ret = drm_encoder_init(dev, encoder, &vkms_encoder_funcs,
> - DRM_MODE_ENCODER_VIRTUAL, NULL);
> - if (ret) {
> + encoder = vkms_encoder_init(vkmsdev);
> + if (IS_ERR(encoder)) {
> DRM_ERROR("Failed to init encoder\n");
> + ret = PTR_ERR(encoder);
> goto err_encoder;
> }
> - encoder->possible_crtcs = 1;
> + encoder->possible_crtcs |= drm_crtc_mask(&vkms_crtc->base);
>
> ret = drm_connector_attach_encoder(connector, encoder);
> if (ret) {
> @@ -104,7 +150,7 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
> }
>
> if (vkmsdev->config.writeback) {
> - writeback = vkms_enable_writeback_connector(vkmsdev);
> + writeback = vkms_enable_writeback_connector(vkmsdev, vkms_crtc);
> if (writeback)
> DRM_ERROR("Failed to init writeback connector\n");
> }
> @@ -120,7 +166,13 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
> drm_connector_cleanup(connector);
>
> err_connector:
> - drm_crtc_cleanup(crtc);
> + drm_crtc_cleanup(&vkms_crtc->base);
> +
> +err_planes:
> + for (int i = 0; i < output->num_planes; i++)
> + drm_plane_cleanup(&output->planes[i].base);
> +
> + memset(output, 0, sizeof(*output));
>
> return ret;
> }
> diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
> index e5c625ab8e3e..950e6c930273 100644
> --- a/drivers/gpu/drm/vkms/vkms_plane.c
> +++ b/drivers/gpu/drm/vkms/vkms_plane.c
> @@ -8,6 +8,8 @@
> #include <drm/drm_fourcc.h>
> #include <drm/drm_gem_atomic_helper.h>
> #include <drm/drm_gem_framebuffer_helper.h>
> +#include <drm/drm_plane.h>
> +#include <drm/drm_plane_helper.h>
>
> #include "vkms_drv.h"
> #include "vkms_formats.h"
> @@ -65,6 +67,20 @@ static void vkms_plane_destroy_state(struct drm_plane *plane,
> kfree(vkms_state);
> }
>
> +static void vkms_plane_destroy(struct drm_plane *plane)
> +{
> + struct vkms_plane *vkms_plane =
> + container_of(plane, struct vkms_plane, base);
> +
> + if (plane->state) {
> + vkms_plane_destroy_state(plane, plane->state);
> + plane->state = NULL;
> + }
> +
> + drm_plane_cleanup(plane);
> + memset(vkms_plane, 0, sizeof(struct vkms_plane));
> +}
> +
> static void vkms_plane_reset(struct drm_plane *plane)
> {
> struct vkms_plane_state *vkms_state;
> @@ -86,9 +102,10 @@ static void vkms_plane_reset(struct drm_plane *plane)
> static const struct drm_plane_funcs vkms_plane_funcs = {
> .update_plane = drm_atomic_helper_update_plane,
> .disable_plane = drm_atomic_helper_disable_plane,
> + .destroy = vkms_plane_destroy,
> .reset = vkms_plane_reset,
> .atomic_duplicate_state = vkms_plane_duplicate_state,
> - .atomic_destroy_state = vkms_plane_destroy_state,
> + .atomic_destroy_state = vkms_plane_destroy_state,
> };
>
> static void vkms_plane_atomic_update(struct drm_plane *plane,
> @@ -198,17 +215,22 @@ static const struct drm_plane_helper_funcs vkms_plane_helper_funcs = {
> };
>
> struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
> - enum drm_plane_type type, int index)
> + enum drm_plane_type type)
> {
> struct drm_device *dev = &vkmsdev->drm;
> + struct vkms_output *output = &vkmsdev->output;
> struct vkms_plane *plane;
> + int ret;
>
> - plane = drmm_universal_plane_alloc(dev, struct vkms_plane, base, 1 << index,
> - &vkms_plane_funcs,
> - vkms_formats, ARRAY_SIZE(vkms_formats),
> - NULL, type, NULL);
> - if (IS_ERR(plane))
> - return plane;
> + if (output->num_planes >= VKMS_MAX_PLANES)
> + return ERR_PTR(-ENOMEM);
> +
> + plane = &output->planes[output->num_planes++];
> + ret = drm_universal_plane_init(dev, &plane->base, 0, &vkms_plane_funcs,
> + vkms_formats, ARRAY_SIZE(vkms_formats),
> + NULL, type, NULL);
> + if (ret)
> + return ERR_PTR(ret);
>
> drm_plane_helper_add(&plane->base, &vkms_plane_helper_funcs);
>
> diff --git a/drivers/gpu/drm/vkms/vkms_writeback.c b/drivers/gpu/drm/vkms/vkms_writeback.c
> index d7e63aa14663..73b8c968e326 100644
> --- a/drivers/gpu/drm/vkms/vkms_writeback.c
> +++ b/drivers/gpu/drm/vkms/vkms_writeback.c
> @@ -1,6 +1,7 @@
> // SPDX-License-Identifier: GPL-2.0+
>
> #include <linux/iosys-map.h>
> +#include <linux/kernel.h>
>
> #include <drm/drm_atomic.h>
> #include <drm/drm_edid.h>
> @@ -102,7 +103,8 @@ 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;
> + struct vkms_crtc *vkms_crtc =
> + container_of(connector, struct vkms_crtc, wb_connector);
>
> if (!job->fb)
> return;
> @@ -111,8 +113,7 @@ static void vkms_wb_cleanup_job(struct drm_writeback_connector *connector,
>
> drm_framebuffer_put(vkmsjob->wb_frame_info.fb);
>
> - vkmsdev = drm_device_to_vkms_device(job->fb->dev);
> - vkms_set_composer(&vkmsdev->output, false);
> + vkms_set_composer(vkms_crtc, false);
> kfree(vkmsjob);
> }
>
> @@ -121,11 +122,10 @@ static void vkms_wb_atomic_commit(struct drm_connector *conn,
> {
> 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 vkms_crtc *vkms_crtc =
> + drm_crtc_to_vkms_crtc(connector_state->crtc);
> + struct drm_writeback_connector *wb_conn = &vkms_crtc->wb_connector;
> + struct vkms_crtc_state *crtc_state = vkms_crtc->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;
> @@ -133,18 +133,18 @@ static void vkms_wb_atomic_commit(struct drm_connector *conn,
> struct vkms_frame_info *wb_frame_info;
> u32 wb_format = fb->format->format;
>
> - if (!conn_state)
> + if (!connector_state)
> return;
>
> - vkms_set_composer(&vkmsdev->output, true);
> + vkms_set_composer(vkms_crtc, true);
>
> - active_wb = conn_state->writeback_job->priv;
> + active_wb = connector_state->writeback_job->priv;
> wb_frame_info = &active_wb->wb_frame_info;
>
> - spin_lock_irq(&output->composer_lock);
> + spin_lock_irq(&vkms_crtc->composer_lock);
> crtc_state->active_writeback = active_wb;
> crtc_state->wb_pending = true;
> - spin_unlock_irq(&output->composer_lock);
> + spin_unlock_irq(&vkms_crtc->composer_lock);
>
> wb_frame_info->offset = fb->offsets[0];
> wb_frame_info->pitch = fb->pitches[0];
> @@ -163,9 +163,10 @@ static const struct drm_connector_helper_funcs vkms_wb_conn_helper_funcs = {
> .atomic_commit = vkms_wb_atomic_commit,
> };
>
> -int vkms_enable_writeback_connector(struct vkms_device *vkmsdev)
> +int vkms_enable_writeback_connector(struct vkms_device *vkmsdev,
> + struct vkms_crtc *vkms_crtc)
> {
> - struct drm_writeback_connector *wb = &vkmsdev->output.wb_connector;
> + struct drm_writeback_connector *wb = &vkms_crtc->wb_connector;
>
> drm_connector_helper_add(&wb->base, &vkms_wb_conn_helper_funcs);
drm_writeback_connector_init() is still passing 1 even though we now
have vkms_crtc->base. You'd need to pass the correct crtc mask,
otherwise only the first connector would have a WB connector.
>
> --
> 2.42.0.rc1.204.g551eb34607-goog
>

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