static int setplane_internal(struct drm_plane *plane,
struct drm_crtc *crtc,
struct drm_framebuffer *fb,
int32_t crtc_x, int32_t crtc_y,
uint32_t crtc_w, uint32_t crtc_h,
/* src_{x,y,w,h} values are 16.16 fixed point */
uint32_t src_x, uint32_t src_y,
uint32_t src_w, uint32_t src_h)
{
struct drm_modeset_acquire_ctx ctx;
int ret;
drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
retry:
ret = drm_modeset_lock_all_ctx(plane->dev, &ctx);
if (ret)
goto fail;
if (drm_drv_uses_atomic_modeset(plane->dev))
ret = __setplane_atomic(plane, crtc, fb,
crtc_x, crtc_y, crtc_w, crtc_h,
src_x, src_y, src_w, src_h, &ctx);
else
ret = __setplane_internal(plane, crtc, fb,
crtc_x, crtc_y, crtc_w, crtc_h,
src_x, src_y, src_w, src_h, &ctx);
fail:
if (ret == -EDEADLK) {
ret = drm_modeset_backoff(&ctx);
if (!ret)
goto retry;
}
drm_modeset_drop_locks(&ctx);
drm_modeset_acquire_fini(&ctx);
return ret;
}
/**
* drm_modeset_lock_all - take all modeset locks
* @dev: DRM device
*
* This function takes all modeset locks, suitable where a more fine-grained
* scheme isn't (yet) implemented. Locks must be dropped by calling the
* drm_modeset_unlock_all() function.
*
* This function is deprecated. It allocates a lock acquisition context and
* stores it in the DRM device's ->mode_config. This facilitate conversion of
* existing code because it removes the need to manually deal with the
* acquisition context, but it is also brittle because the context is global
* and care must be taken not to nest calls. New code should use the
* drm_modeset_lock_all_ctx() function and pass in the context explicitly.
*/
void drm_modeset_lock_all(struct drm_device *dev)
{
struct drm_mode_config *config = &dev->mode_config;
struct drm_modeset_acquire_ctx *ctx;
int ret;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (WARN_ON(!ctx))
return;
mutex_lock(&config->mutex);
drm_modeset_acquire_init(ctx, 0);
retry:
ret = drm_modeset_lock_all_ctx(dev, ctx);
if (ret < 0) {
if (ret == -EDEADLK) {
drm_modeset_backoff(ctx);
goto retry;
}
drm_modeset_acquire_fini(ctx);
kfree(ctx);
return;
}
WARN_ON(config->acquire_ctx);
/*
* We hold the locks now, so it is safe to stash the acquisition
* context for drm_modeset_unlock_all().
*/
config->acquire_ctx = ctx;
drm_warn_on_modeset_not_all_locked(dev);
}
/*
* Try to read the BIOS display configuration and use it for the initial
* fb configuration.
*
* The BIOS or boot loader will generally create an initial display
* configuration for us that includes some set of active pipes and displays.
* This routine tries to figure out which pipes and connectors are active
* and stuffs them into the crtcs and modes array given to us by the
* drm_fb_helper code.
*
* The overall sequence is:
* intel_fbdev_init - from driver load
* intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
* drm_fb_helper_init - build fb helper structs
* drm_fb_helper_single_add_all_connectors - more fb helper structs
* intel_fbdev_initial_config - apply the config
* drm_fb_helper_initial_config - call ->probe then register_framebuffer()
* drm_setup_crtcs - build crtc config for fbdev
* intel_fb_initial_config - find active connectors etc
* drm_fb_helper_single_fb_probe - set up fbdev
* intelfb_create - re-use or alloc fb, build out fbdev structs
*
* Note that we don't make special consideration whether we could actually
* switch to the selected modes without a full modeset. E.g. when the display
* is in VGA mode we need to recalculate watermarks and set a new high-res
* framebuffer anyway.
*/
static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
struct drm_fb_helper_crtc **crtcs,
struct drm_display_mode **modes,
struct drm_fb_offset *offsets,
bool *enabled, int width, int height)
{
struct drm_i915_private *dev_priv = to_i915(fb_helper->dev);
unsigned long conn_configured, conn_seq, mask;
unsigned int count = min(fb_helper->connector_count, BITS_PER_LONG);
int i, j;
bool *save_enabled;
bool fallback = true, ret = true;
int num_connectors_enabled = 0;
int num_connectors_detected = 0;
struct drm_modeset_acquire_ctx ctx;
save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL);
if (!save_enabled)
return false;
drm_modeset_acquire_init(&ctx, 0);
while (drm_modeset_lock_all_ctx(fb_helper->dev, &ctx) != 0)
drm_modeset_backoff(&ctx);
memcpy(save_enabled, enabled, count);
mask = GENMASK(count - 1, 0);
conn_configured = 0;
retry:
conn_seq = conn_configured;
for (i = 0; i < count; i++) {
struct drm_fb_helper_connector *fb_conn;
struct drm_connector *connector;
struct drm_encoder *encoder;
struct drm_fb_helper_crtc *new_crtc;
fb_conn = fb_helper->connector_info[i];
connector = fb_conn->connector;
if (conn_configured & BIT(i))
continue;
if (conn_seq == 0 && !connector->has_tile)
continue;
if (connector->status == connector_status_connected)
num_connectors_detected++;
if (!enabled[i]) {
DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
connector->name);
conn_configured |= BIT(i);
continue;
}
if (connector->force == DRM_FORCE_OFF) {
DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
connector->name);
enabled[i] = false;
continue;
}
encoder = connector->state->best_encoder;
if (!encoder || WARN_ON(!connector->state->crtc)) {
if (connector->force > DRM_FORCE_OFF)
goto bail;
DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
connector->name);
enabled[i] = false;
conn_configured |= BIT(i);
continue;
}
num_connectors_enabled++;
new_crtc = intel_fb_helper_crtc(fb_helper,
connector->state->crtc);
/*
* Make sure we're not trying to drive multiple connectors
* with a single CRTC, since our cloning support may not
* match the BIOS.
*/
for (j = 0; j < count; j++) {
if (crtcs[j] == new_crtc) {
DRM_DEBUG_KMS("fallback: cloned configuration\n");
goto bail;
}
}
DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
connector->name);
/* go for command line mode first */
modes[i] = drm_pick_cmdline_mode(fb_conn);
/* try for preferred next */
if (!modes[i]) {
DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
connector->name, connector->has_tile);
modes[i] = drm_has_preferred_mode(fb_conn, width,
height);
}
/* No preferred mode marked by the EDID? Are there any modes? */
if (!modes[i] && !list_empty(&connector->modes)) {
DRM_DEBUG_KMS("using first mode listed on connector %s\n",
connector->name);
modes[i] = list_first_entry(&connector->modes,
struct drm_display_mode,
head);
}
/* last resort: use current mode */
if (!modes[i]) {
/*
* IMPORTANT: We want to use the adjusted mode (i.e.
* after the panel fitter upscaling) as the initial
* config, not the input mode, which is what crtc->mode
* usually contains. But since our current
* code puts a mode derived from the post-pfit timings
* into crtc->mode this works out correctly.
*
* This is crtc->mode and not crtc->state->mode for the
* fastboot check to work correctly. crtc_state->mode has
* I915_MODE_FLAG_INHERITED, which we clear to force check
* state.
*/
DRM_DEBUG_KMS("looking for current mode on connector %s\n",
connector->name);
modes[i] = &connector->state->crtc->mode;
}
crtcs[i] = new_crtc;
DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n",
connector->name,
connector->state->crtc->base.id,
connector->state->crtc->name,
modes[i]->hdisplay, modes[i]->vdisplay,
modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
fallback = false;
conn_configured |= BIT(i);
}