Hi Am 29.11.22 um 13:43 schrieb Jouni Högander:
After splitting generic drm_fb_helper into it's own file it's left to helper implementation to have fb_dirty function. Currently intel fb doesn't have it. This is causing problems when PSR is enabled. Implement simple fb_dirty callback to deliver notifications to psr about updates in fb console.
I'm a bit confused about i915's use of fb_dirty here. How is this supposed to interact with mmap? i915 doesn't use deferred I/O so fbdev mmap will never call fb_dirty if userspace writes to mmap'ed pages. Is this only required for the kernel's graphics console?
Best regards Thomas
Cc: Thomas Zimmermann <tzimmermann@xxxxxxx> Cc: Jani Nikula <jani.nikula@xxxxxxxxx> Signed-off-by: Jouni Högander <jouni.hogander@xxxxxxxxx> --- drivers/gpu/drm/i915/display/intel_fbdev.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c index 5575d7abdc09..7c7fba3fe69e 100644 --- a/drivers/gpu/drm/i915/display/intel_fbdev.c +++ b/drivers/gpu/drm/i915/display/intel_fbdev.c @@ -328,8 +328,17 @@ static int intelfb_create(struct drm_fb_helper *helper, return ret; }+static int intelfb_dirty(struct drm_fb_helper *helper, struct drm_clip_rect *clip)+{ + if (helper->fb->funcs->dirty) + return helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1); + + return 0; +} + static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { .fb_probe = intelfb_create, + .fb_dirty = intelfb_dirty, };static void intel_fbdev_destroy(struct intel_fbdev *ifbdev)
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Ivo Totev
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