drm/dp: Split drm_dp_mst_allocate_vcpi

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drm_dp_mst_allocate_vcpi() apart from setting up the vcpi structure,
also finds if there are enough slots available. This check is a duplicate
of that implemented in drm_dp_mst_find_vcpi_slots(). Let's move this check
out and reuse the existing drm_dp_mst_find_vcpi_slots() function to check
if there are enough vcpi slots before allocating them.

This brings the check to one place. Additionally drivers that will use MST
state tracking for atomic modesets can use the atomic version of
find_vcpi_slots() and reuse drm_dp_mst_allocate_vcpi()

Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1489648231-30700-4-git-send-email-dhinakaran.pandiyan@intel.com

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Pandiyan, Dhinakaran 2017-03-16 00:10:26 -07:00 • committed by Daniel Vetter

parent feb2c3bc33

commit 1e797f556c

5 changed files with 19 additions and 16 deletions

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21

drivers/gpu/drm/drm_dp_mst_topology.c

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4

drivers/gpu/drm/i915/intel_dp_mst.c

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3

drivers/gpu/drm/nouveau/nv50_display.c

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4

drivers/gpu/drm/radeon/radeon_dp_mst.c

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3

include/drm/drm_dp_mst_helper.h

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