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[47/76] drm/i915: implement crtc helper semantics relied upon by the fb helper

Message ID 1343328581-2324-48-git-send-email-daniel.vetter@ffwll.ch (mailing list archive)
State New, archived
Headers show

Commit Message

Daniel Vetter July 26, 2012, 6:49 p.m. UTC 
Yikes!

But yeah, we have to do this until someone volunteers to clean up the
fb helper and rid it of its incetious relationship with the crtc
helper code.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |    6 ++++++
 1 file changed, 6 insertions(+)
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Patch

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index d11d866..c38d503 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6860,6 +6860,12 @@  static int intel_crtc_set_config(struct drm_mode_set *set)
 	if (!set->mode)
 		set->fb = NULL;
 
+	/* The fb helper likes to play gross jokes with ->mode_set_config.
+	 * Unfortunately the crtc helper doesn't do much at all for this case,
+	 * so we have to cope with this madness until the fb helper is fixed up. */
+	if (set->fb && set->num_connectors == 0)
+		return 0;
+
 	if (set->fb) {
 		DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
 				set->crtc->base.id, set->fb->base.id,