In some cases we may need to turn off more pipes than just the ones affected by a connector or encoder change, probably due to modifying some global resource that requires all pipes to shut down. Add a hook for this purpose to allow platform code to adjust the prepare_pipes mask, which allows otherwise active pipes to get shut down for the duration of the mode set, then restored at the end.
Signed-off-by: Jesse Barnes <[email protected]> --- drivers/gpu/drm/i915/i915_drv.h | 12 ++++++++++++ drivers/gpu/drm/i915/intel_display.c | 7 +++++++ 2 files changed, 19 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 5edf9bb..7530cd4 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -380,6 +380,18 @@ struct drm_i915_display_funcs { struct drm_crtc *crtc, uint32_t sprite_width, int pixel_size, bool enable, bool scaled); + /** + * modeset_global_pipes - figure out which pipes need to be disabled + * @dev: drm device + * @prepare_pipes: bitmask of pipes to disable + * + * In some cases, adjusting a global resource may require shutting + * down seemingly unrelated pipes on a mode set. This function + * should determine that and adjust the prepare_pipes bitmask + * as needed. + */ + void (*modeset_global_pipes)(struct drm_device *dev, + unsigned *prepare_pipes); void (*modeset_global_resources)(struct drm_device *dev); /* Returns the active state of the crtc, and if the crtc is active, * fills out the pipe-config with the hw state. */ diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 606a594..faa7548 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -9298,6 +9298,13 @@ static int __intel_set_mode(struct drm_crtc *crtc, intel_modeset_affected_pipes(crtc, &modeset_pipes, &prepare_pipes, &disable_pipes); + /* + * See if the config requires any additional preparation, e.g. + * to adjust global state with pipes off. + */ + if (dev_priv->display.modeset_global_pipes) + dev_priv->display.modeset_global_pipes(dev, &prepare_pipes); + *saved_hwmode = crtc->hwmode; *saved_mode = crtc->mode; -- 1.8.3.1 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
