[PATCH V3 2/5] drm/vkms: Rename vkms_crc.c into vkms_composer.c

From: Rodrigo Siqueira
Date: Tue Jun 25 2019 - 21:37:14 EST

As a preparation work for introducing writeback to vkms, this patch
renames the file vkms_crc.c into vkms_composer.c. Accordingly, it also
adjusts the functions and data structures to match the changes.

No functional change.

Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@xxxxxxxxx>
---
drivers/gpu/drm/vkms/Makefile | 2 +-
.../drm/vkms/{vkms_crc.c => vkms_composer.c} | 98 ++++++++++---------
drivers/gpu/drm/vkms/vkms_crtc.c | 30 +++---
drivers/gpu/drm/vkms/vkms_drv.c | 4 +-
drivers/gpu/drm/vkms/vkms_drv.h | 28 +++---
drivers/gpu/drm/vkms/vkms_plane.c | 36 +++----
6 files changed, 101 insertions(+), 97 deletions(-)
rename drivers/gpu/drm/vkms/{vkms_crc.c => vkms_composer.c} (65%)

diff --git a/drivers/gpu/drm/vkms/Makefile b/drivers/gpu/drm/vkms/Makefile
index 89f09bec7b23..0b767d7efa24 100644
--- a/drivers/gpu/drm/vkms/Makefile
+++ b/drivers/gpu/drm/vkms/Makefile
@@ -1,4 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
-vkms-y := vkms_drv.o vkms_plane.o vkms_output.o vkms_crtc.o vkms_gem.o vkms_crc.o
+vkms-y := vkms_drv.o vkms_plane.o vkms_output.o vkms_crtc.o vkms_gem.o vkms_composer.o

obj-$(CONFIG_DRM_VKMS) += vkms.o
diff --git a/drivers/gpu/drm/vkms/vkms_crc.c b/drivers/gpu/drm/vkms/vkms_composer.c
similarity index 65%
rename from drivers/gpu/drm/vkms/vkms_crc.c
rename to drivers/gpu/drm/vkms/vkms_composer.c
index 30b048b67a32..eb7ea8be1f98 100644
--- a/drivers/gpu/drm/vkms/vkms_crc.c
+++ b/drivers/gpu/drm/vkms/vkms_composer.c
@@ -10,25 +10,25 @@
* compute_crc - Compute CRC value on output frame
*
* @vaddr_out: address to final framebuffer
- * @crc_out: framebuffer's metadata
+ * @composer: framebuffer's metadata
*
* returns CRC value computed using crc32 on the visible portion of
* the final framebuffer at vaddr_out
*/
-static uint32_t compute_crc(void *vaddr_out, struct vkms_crc_data *crc_out)
+static uint32_t compute_crc(void *vaddr_out, struct vkms_composer *composer)
{
int i, j, src_offset;
- int x_src = crc_out->src.x1 >> 16;
- int y_src = crc_out->src.y1 >> 16;
- int h_src = drm_rect_height(&crc_out->src) >> 16;
- int w_src = drm_rect_width(&crc_out->src) >> 16;
+ int x_src = composer->src.x1 >> 16;
+ int y_src = composer->src.y1 >> 16;
+ int h_src = drm_rect_height(&composer->src) >> 16;
+ int w_src = drm_rect_width(&composer->src) >> 16;
u32 crc = 0;

for (i = y_src; i < y_src + h_src; ++i) {
for (j = x_src; j < x_src + w_src; ++j) {
- src_offset = crc_out->offset
- + (i * crc_out->pitch)
- + (j * crc_out->cpp);
+ src_offset = composer->offset
+ + (i * composer->pitch)
+ + (j * composer->cpp);
/* XRGB format ignores Alpha channel */
memset(vaddr_out + src_offset + 24, 0, 8);
crc = crc32_le(crc, vaddr_out + src_offset,
@@ -43,8 +43,8 @@ static uint32_t compute_crc(void *vaddr_out, struct vkms_crc_data *crc_out)
* blend - belnd value at vaddr_src with value at vaddr_dst
* @vaddr_dst: destination address
* @vaddr_src: source address
- * @crc_dst: destination framebuffer's metadata
- * @crc_src: source framebuffer's metadata
+ * @dest_composer: destination framebuffer's metadata
+ * @src_composer: source framebuffer's metadata
*
* Blend value at vaddr_src with value at vaddr_dst.
* Currently, this function write value at vaddr_src on value
@@ -55,31 +55,31 @@ static uint32_t compute_crc(void *vaddr_out, struct vkms_crc_data *crc_out)
* instead of overwriting it.
*/
static void blend(void *vaddr_dst, void *vaddr_src,
- struct vkms_crc_data *crc_dst,
- struct vkms_crc_data *crc_src)
+ struct vkms_composer *dest_composer,
+ struct vkms_composer *src_composer)
{
int i, j, j_dst, i_dst;
int offset_src, offset_dst;

- int x_src = crc_src->src.x1 >> 16;
- int y_src = crc_src->src.y1 >> 16;
+ int x_src = src_composer->src.x1 >> 16;
+ int y_src = src_composer->src.y1 >> 16;

- int x_dst = crc_src->dst.x1;
- int y_dst = crc_src->dst.y1;
- int h_dst = drm_rect_height(&crc_src->dst);
- int w_dst = drm_rect_width(&crc_src->dst);
+ int x_dst = src_composer->dst.x1;
+ int y_dst = src_composer->dst.y1;
+ int h_dst = drm_rect_height(&src_composer->dst);
+ int w_dst = drm_rect_width(&src_composer->dst);

int y_limit = y_src + h_dst;
int x_limit = x_src + w_dst;

for (i = y_src, i_dst = y_dst; i < y_limit; ++i) {
for (j = x_src, j_dst = x_dst; j < x_limit; ++j) {
- offset_dst = crc_dst->offset
- + (i_dst * crc_dst->pitch)
- + (j_dst++ * crc_dst->cpp);
- offset_src = crc_src->offset
- + (i * crc_src->pitch)
- + (j * crc_src->cpp);
+ offset_dst = dest_composer->offset
+ + (i_dst * dest_composer->pitch)
+ + (j_dst++ * dest_composer->cpp);
+ offset_src = src_composer->offset
+ + (i * src_composer->pitch)
+ + (j * src_composer->cpp);

memcpy(vaddr_dst + offset_dst,
vaddr_src + offset_src, sizeof(u32));
@@ -88,25 +88,27 @@ static void blend(void *vaddr_dst, void *vaddr_src,
}
}

-static void compose_cursor(struct vkms_crc_data *cursor_crc,
- struct vkms_crc_data *primary_crc, void *vaddr_out)
+static void compose_cursor(struct vkms_composer *cursor_composer,
+ struct vkms_composer *primary_composer,
+ void *vaddr_out)
{
struct drm_gem_object *cursor_obj;
struct vkms_gem_object *cursor_vkms_obj;

- cursor_obj = drm_gem_fb_get_obj(&cursor_crc->fb, 0);
+ cursor_obj = drm_gem_fb_get_obj(&cursor_composer->fb, 0);
cursor_vkms_obj = drm_gem_to_vkms_gem(cursor_obj);

if (WARN_ON(!cursor_vkms_obj->vaddr))
return;

- blend(vaddr_out, cursor_vkms_obj->vaddr, primary_crc, cursor_crc);
+ blend(vaddr_out, cursor_vkms_obj->vaddr,
+ primary_composer, cursor_composer);
}

-static uint32_t _vkms_get_crc(struct vkms_crc_data *primary_crc,
- struct vkms_crc_data *cursor_crc)
+static uint32_t _vkms_get_crc(struct vkms_composer *primary_composer,
+ struct vkms_composer *cursor_composer)
{
- struct drm_framebuffer *fb = &primary_crc->fb;
+ struct drm_framebuffer *fb = &primary_composer->fb;
struct drm_gem_object *gem_obj = drm_gem_fb_get_obj(fb, 0);
struct vkms_gem_object *vkms_obj = drm_gem_to_vkms_gem(gem_obj);
void *vaddr_out = kzalloc(vkms_obj->gem.size, GFP_KERNEL);
@@ -124,10 +126,10 @@ static uint32_t _vkms_get_crc(struct vkms_crc_data *primary_crc,

memcpy(vaddr_out, vkms_obj->vaddr, vkms_obj->gem.size);

- if (cursor_crc)
- compose_cursor(cursor_crc, primary_crc, vaddr_out);
+ if (cursor_composer)
+ compose_cursor(cursor_composer, primary_composer, vaddr_out);

- crc = compute_crc(vaddr_out, primary_crc);
+ crc = compute_crc(vaddr_out, primary_composer);

kfree(vaddr_out);

@@ -135,35 +137,35 @@ static uint32_t _vkms_get_crc(struct vkms_crc_data *primary_crc,
}

/**
- * vkms_crc_work_handle - ordered work_struct to compute CRC
+ * vkms_composer_worker - ordered work_struct to compute CRC
*
* @work: work_struct
*
- * Work handler for computing CRCs. work_struct scheduled in
+ * Work handler for composing and computing CRCs. work_struct scheduled in
* an ordered workqueue that's periodically scheduled to run by
* _vblank_handle() and flushed at vkms_atomic_crtc_destroy_state().
*/
-void vkms_crc_work_handle(struct work_struct *work)
+void vkms_composer_worker(struct work_struct *work)
{
struct vkms_crtc_state *crtc_state = container_of(work,
struct vkms_crtc_state,
- crc_work);
+ composer_work);
struct drm_crtc *crtc = crtc_state->base.crtc;
struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
- struct vkms_crc_data *primary_crc = NULL;
- struct vkms_crc_data *cursor_crc = NULL;
+ struct vkms_composer *primary_composer = NULL;
+ struct vkms_composer *cursor_composer = NULL;
u32 crc32 = 0;
u64 frame_start, frame_end;
bool crc_pending;

- spin_lock_irq(&out->crc_lock);
+ spin_lock_irq(&out->composer_lock);
frame_start = crtc_state->frame_start;
frame_end = crtc_state->frame_end;
crc_pending = crtc_state->crc_pending;
crtc_state->frame_start = 0;
crtc_state->frame_end = 0;
crtc_state->crc_pending = false;
- spin_unlock_irq(&out->crc_lock);
+ spin_unlock_irq(&out->composer_lock);

/*
* We raced with the vblank hrtimer and previous work already computed
@@ -173,13 +175,13 @@ void vkms_crc_work_handle(struct work_struct *work)
return;

if (crtc_state->num_active_planes >= 1)
- primary_crc = crtc_state->active_planes[0]->crc_data;
+ primary_composer = crtc_state->active_planes[0]->composer;

if (crtc_state->num_active_planes == 2)
- cursor_crc = crtc_state->active_planes[1]->crc_data;
+ cursor_composer = crtc_state->active_planes[1]->composer;

- if (primary_crc)
- crc32 = _vkms_get_crc(primary_crc, cursor_crc);
+ if (primary_composer)
+ crc32 = _vkms_get_crc(primary_composer, cursor_composer);

/*
* The worker can fall behind the vblank hrtimer, make sure we catch up.
@@ -237,7 +239,7 @@ int vkms_set_crc_source(struct drm_crtc *crtc, const char *src_name)
ret = vkms_crc_parse_source(src_name, &enabled);

spin_lock_irq(&out->lock);
- out->crc_enabled = enabled;
+ out->composer_enabled = enabled;
spin_unlock_irq(&out->lock);

return ret;
diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
index a648892379c3..04c6f4250dea 100644
--- a/drivers/gpu/drm/vkms/vkms_crtc.c
+++ b/drivers/gpu/drm/vkms/vkms_crtc.c
@@ -24,14 +24,14 @@ static enum hrtimer_restart vkms_vblank_simulate(struct hrtimer *timer)
if (!ret)
DRM_ERROR("vkms failure on handling vblank");

- state = output->crc_state;
- if (state && output->crc_enabled) {
+ state = output->composer_state;
+ if (state && output->composer_enabled) {
u64 frame = drm_crtc_accurate_vblank_count(crtc);

- /* update frame_start only if a queued vkms_crc_work_handle()
+ /* update frame_start only if a queued vkms_composer_worker()
* has read the data
*/
- spin_lock(&output->crc_lock);
+ spin_lock(&output->composer_lock);
if (!state->crc_pending)
state->frame_start = frame;
else
@@ -39,11 +39,11 @@ 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->crc_lock);
+ spin_unlock(&output->composer_lock);

- ret = queue_work(output->crc_workq, &state->crc_work);
+ ret = queue_work(output->composer_workq, &state->composer_work);
if (!ret)
- DRM_DEBUG_DRIVER("vkms_crc_work_handle already queued\n");
+ DRM_DEBUG_DRIVER("Composer worker already queued\n");
}

spin_unlock(&output->lock);
@@ -114,7 +114,7 @@ vkms_atomic_crtc_duplicate_state(struct drm_crtc *crtc)

__drm_atomic_helper_crtc_duplicate_state(crtc, &vkms_state->base);

- INIT_WORK(&vkms_state->crc_work, vkms_crc_work_handle);
+ INIT_WORK(&vkms_state->composer_work, vkms_composer_worker);

return &vkms_state->base;
}
@@ -126,7 +126,7 @@ static void vkms_atomic_crtc_destroy_state(struct drm_crtc *crtc,

__drm_atomic_helper_crtc_destroy_state(state);

- WARN_ON(work_pending(&vkms_state->crc_work));
+ WARN_ON(work_pending(&vkms_state->composer_work));
kfree(vkms_state->active_planes);
kfree(vkms_state);
}
@@ -141,7 +141,7 @@ static void vkms_atomic_crtc_reset(struct drm_crtc *crtc)

__drm_atomic_helper_crtc_reset(crtc, &vkms_state->base);
if (vkms_state)
- INIT_WORK(&vkms_state->crc_work, vkms_crc_work_handle);
+ INIT_WORK(&vkms_state->composer_work, vkms_composer_worker);
}

static const struct drm_crtc_funcs vkms_crtc_funcs = {
@@ -222,7 +222,7 @@ static void vkms_crtc_atomic_begin(struct drm_crtc *crtc,
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_crc_work_handle until the crc_data is updated
+ * from scheduling vkms_composer_worker until the composer is updated
*/
spin_lock_irq(&vkms_output->lock);
}
@@ -245,7 +245,7 @@ static void vkms_crtc_atomic_flush(struct drm_crtc *crtc,
crtc->state->event = NULL;
}

- vkms_output->crc_state = to_vkms_crtc_state(crtc->state);
+ vkms_output->composer_state = to_vkms_crtc_state(crtc->state);

spin_unlock_irq(&vkms_output->lock);
}
@@ -274,10 +274,10 @@ int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
drm_crtc_helper_add(crtc, &vkms_crtc_helper_funcs);

spin_lock_init(&vkms_out->lock);
- spin_lock_init(&vkms_out->crc_lock);
+ spin_lock_init(&vkms_out->composer_lock);

- vkms_out->crc_workq = alloc_ordered_workqueue("vkms_crc_workq", 0);
- if (!vkms_out->crc_workq)
+ 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
index 966b3d653189..ac790b6527e4 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.c
+++ b/drivers/gpu/drm/vkms/vkms_drv.c
@@ -56,7 +56,7 @@ static void vkms_release(struct drm_device *dev)
drm_atomic_helper_shutdown(&vkms->drm);
drm_mode_config_cleanup(&vkms->drm);
drm_dev_fini(&vkms->drm);
- destroy_workqueue(vkms->output.crc_workq);
+ destroy_workqueue(vkms->output.composer_workq);
}

static void vkms_atomic_commit_tail(struct drm_atomic_state *old_state)
@@ -82,7 +82,7 @@ static void vkms_atomic_commit_tail(struct drm_atomic_state *old_state)
struct vkms_crtc_state *vkms_state =
to_vkms_crtc_state(old_crtc_state);

- flush_work(&vkms_state->crc_work);
+ flush_work(&vkms_state->composer_work);
}

drm_atomic_helper_cleanup_planes(dev, old_state);
diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index e2d1aa089dec..fc6cda164336 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -20,7 +20,7 @@

extern bool enable_cursor;

-struct vkms_crc_data {
+struct vkms_composer {
struct drm_framebuffer fb;
struct drm_rect src, dst;
unsigned int offset;
@@ -31,29 +31,29 @@ struct vkms_crc_data {
/**
* vkms_plane_state - Driver specific plane state
* @base: base plane state
- * @crc_data: data required for CRC computation
+ * @composer: data required for composing computation
*/
struct vkms_plane_state {
struct drm_plane_state base;
- struct vkms_crc_data *crc_data;
+ struct vkms_composer *composer;
};

/**
* vkms_crtc_state - Driver specific CRTC state
* @base: base CRTC state
- * @crc_work: work struct to compute and add CRC entries
+ * @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 crc_work;
+ 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;

- /* below three are protected by vkms_output.crc_lock */
+ /* below three are protected by vkms_output.composer_lock */
bool crc_pending;
u64 frame_start;
u64 frame_end;
@@ -66,16 +66,16 @@ struct vkms_output {
struct hrtimer vblank_hrtimer;
ktime_t period_ns;
struct drm_pending_vblank_event *event;
- /* ordered wq for crc_work */
- struct workqueue_struct *crc_workq;
- /* protects concurrent access to crc_data */
+ /* ordered wq for composer_work */
+ struct workqueue_struct *composer_workq;
+ /* protects concurrent access to composer */
spinlock_t lock;

/* protected by @lock */
- bool crc_enabled;
- struct vkms_crtc_state *crc_state;
+ bool composer_enabled;
+ struct vkms_crtc_state *composer_state;

- spinlock_t crc_lock;
+ spinlock_t composer_lock;
};

struct vkms_device {
@@ -143,6 +143,8 @@ const char *const *vkms_get_crc_sources(struct drm_crtc *crtc,
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);
-void vkms_crc_work_handle(struct work_struct *work);
+
+/* Composer Support */
+void vkms_composer_worker(struct work_struct *work);

#endif /* _VKMS_DRV_H_ */
diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
index 18c630cfc485..8b60d3434d75 100644
--- a/drivers/gpu/drm/vkms/vkms_plane.c
+++ b/drivers/gpu/drm/vkms/vkms_plane.c
@@ -18,20 +18,20 @@ static struct drm_plane_state *
vkms_plane_duplicate_state(struct drm_plane *plane)
{
struct vkms_plane_state *vkms_state;
- struct vkms_crc_data *crc_data;
+ struct vkms_composer *composer;

vkms_state = kzalloc(sizeof(*vkms_state), GFP_KERNEL);
if (!vkms_state)
return NULL;

- crc_data = kzalloc(sizeof(*crc_data), GFP_KERNEL);
- if (!crc_data) {
- DRM_DEBUG_KMS("Couldn't allocate crc_data\n");
+ composer = kzalloc(sizeof(*composer), GFP_KERNEL);
+ if (!composer) {
+ DRM_DEBUG_KMS("Couldn't allocate composer\n");
kfree(vkms_state);
return NULL;
}

- vkms_state->crc_data = crc_data;
+ vkms_state->composer = composer;

__drm_atomic_helper_plane_duplicate_state(plane,
&vkms_state->base);
@@ -49,12 +49,12 @@ static void vkms_plane_destroy_state(struct drm_plane *plane,
/* dropping the reference we acquired in
* vkms_primary_plane_update()
*/
- if (drm_framebuffer_read_refcount(&vkms_state->crc_data->fb))
- drm_framebuffer_put(&vkms_state->crc_data->fb);
+ if (drm_framebuffer_read_refcount(&vkms_state->composer->fb))
+ drm_framebuffer_put(&vkms_state->composer->fb);
}

- kfree(vkms_state->crc_data);
- vkms_state->crc_data = NULL;
+ kfree(vkms_state->composer);
+ vkms_state->composer = NULL;

__drm_atomic_helper_plane_destroy_state(old_state);
kfree(vkms_state);
@@ -91,21 +91,21 @@ static void vkms_plane_atomic_update(struct drm_plane *plane,
{
struct vkms_plane_state *vkms_plane_state;
struct drm_framebuffer *fb = plane->state->fb;
- struct vkms_crc_data *crc_data;
+ struct vkms_composer *composer;

if (!plane->state->crtc || !fb)
return;

vkms_plane_state = to_vkms_plane_state(plane->state);

- crc_data = vkms_plane_state->crc_data;
- memcpy(&crc_data->src, &plane->state->src, sizeof(struct drm_rect));
- memcpy(&crc_data->dst, &plane->state->dst, sizeof(struct drm_rect));
- memcpy(&crc_data->fb, fb, sizeof(struct drm_framebuffer));
- drm_framebuffer_get(&crc_data->fb);
- crc_data->offset = fb->offsets[0];
- crc_data->pitch = fb->pitches[0];
- crc_data->cpp = fb->format->cpp[0];
+ composer = vkms_plane_state->composer;
+ memcpy(&composer->src, &plane->state->src, sizeof(struct drm_rect));
+ memcpy(&composer->dst, &plane->state->dst, sizeof(struct drm_rect));
+ memcpy(&composer->fb, fb, sizeof(struct drm_framebuffer));
+ drm_framebuffer_get(&composer->fb);
+ composer->offset = fb->offsets[0];
+ composer->pitch = fb->pitches[0];
+ composer->cpp = fb->format->cpp[0];
}

static int vkms_plane_atomic_check(struct drm_plane *plane,
--
2.21.0