From c2b4cacfe9816c1fe378c785ce8a678cf0635ec6 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Mon, 8 Jul 2013 18:16:56 -0400
Subject: [PATCH] drm/radeon/hdmi: make sure we have an afmt block assigned

Prevents a segfault if an afmt block is not assigned to the
encoder such as in the LVDS or eDP case.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=66714

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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