xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

qxl: refactor to use drm_fb_helper_fbdev_setup

Browse Source 
Lots of code can be removed by relying on fb-helper:
- "struct drm_framebuffer" moves to fb_helper.fb.
- "struct drm_gem_object" moves to fb_helper.obj[0].
- "struct qxl_device" can be inferred as drm_fb_helper is embedded.
- qxl_user_framebuffer_create -> drm_gem_fb_create.
- qxl_user_framebuffer_destroy -> drm_gem_fb_destroy.
- qxl_fbdev_destroy -> drm_fb_helper_fbdev_teardown + vfree(shadow).

Remove unused code:
- qxl_fbdev_qobj_is_fb, qxl_fbdev_set_suspend.
- Unused fields of qxl_fbdev: delayed_ops, delayed_ops_lock, size.

Misc notes:
- The dirty callback is preserved as it is necessary to trigger update
  commands in the hw (the screen stays black otherwise).
- No idea when .create_handle in drm_framebuffer_funcs is used, but use
  the same drm_gem_fb_create_handle to match drm_gem_fb_funcs.
- I don't know why qxl_fb_find_or_create_single used to check for an
  existing framebuffer and removed that check to match other drivers.
- Use of drm_fb_helper_fbdev_teardown also requires "info->fbdefio" to
  be dynamically allocated. Replace the existing defio config by
  drm_fb_helper_defio_init to accomodate this.

Testing results: startx with fbdev, modesetting and qxl all seems to
work. Tested also with CONFIG_DRM_FBDEV_EMULATION=n, fbdev obviously
fails but others are fine. QEMU -spice and QEMU -spice with vdagent and
multiple (resized) displays (via remote-viewer) also works.
unbind vtconsole and rmmod has *not* regressed (i.e. it still trips on a
use-after-free in qxl_check_idle via qxl_ttm_fini).

Ideally setup/teardown is replaced by drm_fbdev_generic_setup as that
would result in further code reduction, improve error handling (like not
leaking shadow memory), but unfortunately QXL has no implementation for
qxl_gem_prime_vmap.

Signed-off-by: Peter Wu <peter@lekensteyn.nl>
Link: http://patchwork.freedesktop.org/patch/msgid/20180910132156.23201-1-peter@lekensteyn.nl
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Peter Wu
2018-09-10 15:21:56 +02:00
committed by Gerd Hoffmann
parent 33f35429fc
commit bf8744e40c
4 changed files with 60 additions and 276 deletions
Download Patch File Download Diff File Expand all files Collapse all files

101
drivers/gpu/drm/qxl/qxl_display.c
View File

@@ -28,6 +28,7 @@
#include <drm/drm_plane_helper.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_atomic.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include "qxl_drv.h"
#include "qxl_object.h"
@@ -388,17 +389,6 @@ static const struct drm_crtc_funcs qxl_crtc_funcs = {
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
};
void qxl_user_framebuffer_destroy(struct drm_framebuffer *fb)
{
struct qxl_framebuffer *qxl_fb = to_qxl_framebuffer(fb);
struct qxl_bo *bo = gem_to_qxl_bo(qxl_fb->obj);
WARN_ON(bo->shadow);
drm_gem_object_put_unlocked(qxl_fb->obj);
drm_framebuffer_cleanup(fb);
kfree(qxl_fb);
}
static int qxl_framebuffer_surface_dirty(struct drm_framebuffer *fb,
struct drm_file *file_priv,
unsigned flags, unsigned color,
@@ -406,15 +396,14 @@ static int qxl_framebuffer_surface_dirty(struct drm_framebuffer *fb,
unsigned num_clips)
{
/* TODO: vmwgfx where this was cribbed from had locking. Why? */
struct qxl_framebuffer *qxl_fb = to_qxl_framebuffer(fb);
struct qxl_device *qdev = qxl_fb->base.dev->dev_private;
struct qxl_device *qdev = fb->dev->dev_private;
struct drm_clip_rect norect;
struct qxl_bo *qobj;
int inc = 1;
drm_modeset_lock_all(fb->dev);
qobj = gem_to_qxl_bo(qxl_fb->obj);
qobj = gem_to_qxl_bo(fb->obj[0]);
/* if we aren't primary surface ignore this */
if (!qobj->is_primary) {
drm_modeset_unlock_all(fb->dev);
@@ -432,7 +421,7 @@ static int qxl_framebuffer_surface_dirty(struct drm_framebuffer *fb,
inc = 2; /* skip source rects */
}
qxl_draw_dirty_fb(qdev, qxl_fb, qobj, flags, color,
qxl_draw_dirty_fb(qdev, fb, qobj, flags, color,
clips, num_clips, inc);
drm_modeset_unlock_all(fb->dev);
@@ -441,31 +430,11 @@ static int qxl_framebuffer_surface_dirty(struct drm_framebuffer *fb,
}
static const struct drm_framebuffer_funcs qxl_fb_funcs = {
.destroy = qxl_user_framebuffer_destroy,
.destroy = drm_gem_fb_destroy,
.dirty = qxl_framebuffer_surface_dirty,
/* TODO?
* .create_handle = qxl_user_framebuffer_create_handle, */
.create_handle = drm_gem_fb_create_handle,
};
int
qxl_framebuffer_init(struct drm_device *dev,
struct qxl_framebuffer *qfb,
const struct drm_mode_fb_cmd2 *mode_cmd,
struct drm_gem_object *obj,
const struct drm_framebuffer_funcs *funcs)
{
int ret;
qfb->obj = obj;
drm_helper_mode_fill_fb_struct(dev, &qfb->base, mode_cmd);
ret = drm_framebuffer_init(dev, &qfb->base, funcs);
if (ret) {
qfb->obj = NULL;
return ret;
}
return 0;
}
static void qxl_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_crtc_state *old_state)
{
@@ -488,14 +457,12 @@ static int qxl_primary_atomic_check(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct qxl_device *qdev = plane->dev->dev_private;
struct qxl_framebuffer *qfb;
struct qxl_bo *bo;
if (!state->crtc || !state->fb)
return 0;
qfb = to_qxl_framebuffer(state->fb);
bo = gem_to_qxl_bo(qfb->obj);
bo = gem_to_qxl_bo(state->fb->obj[0]);
if (bo->surf.stride * bo->surf.height > qdev->vram_size) {
DRM_ERROR("Mode doesn't fit in vram size (vgamem)");
@@ -556,23 +523,19 @@ static void qxl_primary_atomic_update(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
struct qxl_device *qdev = plane->dev->dev_private;
struct qxl_framebuffer *qfb =
to_qxl_framebuffer(plane->state->fb);
struct qxl_framebuffer *qfb_old;
struct qxl_bo *bo = gem_to_qxl_bo(qfb->obj);
struct qxl_bo *bo = gem_to_qxl_bo(plane->state->fb->obj[0]);
struct qxl_bo *bo_old;
struct drm_clip_rect norect = {
.x1 = 0,
.y1 = 0,
.x2 = qfb->base.width,
.y2 = qfb->base.height
.x2 = plane->state->fb->width,
.y2 = plane->state->fb->height
};
int ret;
bool same_shadow = false;
if (old_state->fb) {
qfb_old = to_qxl_framebuffer(old_state->fb);
bo_old = gem_to_qxl_bo(qfb_old->obj);
bo_old = gem_to_qxl_bo(old_state->fb->obj[0]);
} else {
bo_old = NULL;
}
@@ -602,7 +565,7 @@ static void qxl_primary_atomic_update(struct drm_plane *plane,
bo->is_primary = true;
}
qxl_draw_dirty_fb(qdev, qfb, bo, 0, 0, &norect, 1, 1);
qxl_draw_dirty_fb(qdev, plane->state->fb, bo, 0, 0, &norect, 1, 1);
}
static void qxl_primary_atomic_disable(struct drm_plane *plane,
@@ -611,9 +574,7 @@ static void qxl_primary_atomic_disable(struct drm_plane *plane,
struct qxl_device *qdev = plane->dev->dev_private;
if (old_state->fb) {
struct qxl_framebuffer *qfb =
to_qxl_framebuffer(old_state->fb);
struct qxl_bo *bo = gem_to_qxl_bo(qfb->obj);
struct qxl_bo *bo = gem_to_qxl_bo(old_state->fb->obj[0]);
if (bo->is_primary) {
qxl_io_destroy_primary(qdev);
@@ -645,7 +606,7 @@ static void qxl_cursor_atomic_update(struct drm_plane *plane,
return;
if (fb != old_state->fb) {
obj = to_qxl_framebuffer(fb)->obj;
obj = fb->obj[0];
user_bo = gem_to_qxl_bo(obj);
/* pinning is done in the prepare/cleanup framevbuffer */
@@ -765,13 +726,13 @@ static int qxl_plane_prepare_fb(struct drm_plane *plane,
if (!new_state->fb)
return 0;
obj = to_qxl_framebuffer(new_state->fb)->obj;
obj = new_state->fb->obj[0];
user_bo = gem_to_qxl_bo(obj);
if (plane->type == DRM_PLANE_TYPE_PRIMARY &&
user_bo->is_dumb && !user_bo->shadow) {
if (plane->state->fb) {
obj = to_qxl_framebuffer(plane->state->fb)->obj;
obj = plane->state->fb->obj[0];
old_bo = gem_to_qxl_bo(obj);
}
if (old_bo && old_bo->shadow &&
@@ -815,7 +776,7 @@ static void qxl_plane_cleanup_fb(struct drm_plane *plane,
return;
}
obj = to_qxl_framebuffer(old_state->fb)->obj;
obj = old_state->fb->obj[0];
user_bo = gem_to_qxl_bo(obj);
qxl_bo_unpin(user_bo);
@@ -1115,26 +1076,8 @@ qxl_user_framebuffer_create(struct drm_device *dev,
struct drm_file *file_priv,
const struct drm_mode_fb_cmd2 *mode_cmd)
{
struct drm_gem_object *obj;
struct qxl_framebuffer *qxl_fb;
int ret;
obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]);
if (!obj)
return NULL;
qxl_fb = kzalloc(sizeof(*qxl_fb), GFP_KERNEL);
if (qxl_fb == NULL)
return NULL;
ret = qxl_framebuffer_init(dev, qxl_fb, mode_cmd, obj, &qxl_fb_funcs);
if (ret) {
kfree(qxl_fb);
drm_gem_object_put_unlocked(obj);
return NULL;
}
return &qxl_fb->base;
return drm_gem_fb_create_with_funcs(dev, file_priv, mode_cmd,
&qxl_fb_funcs);
}
static const struct drm_mode_config_funcs qxl_mode_funcs = {
@@ -1221,7 +1164,6 @@ int qxl_modeset_init(struct qxl_device *qdev)
}
qxl_display_read_client_monitors_config(qdev);
qdev->mode_info.mode_config_initialized = true;
drm_mode_config_reset(&qdev->ddev);
@@ -1237,8 +1179,5 @@ void qxl_modeset_fini(struct qxl_device *qdev)
qxl_fbdev_fini(qdev);
qxl_destroy_monitors_object(qdev);
if (qdev->mode_info.mode_config_initialized) {
drm_mode_config_cleanup(&qdev->ddev);
qdev->mode_info.mode_config_initialized = false;
}
drm_mode_config_cleanup(&qdev->ddev);
}