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drm/radeon/kms: add crtc_disable function for legacy crtc

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To plug the VRAM memory leak (see previous patch for
details) we must unpin the frame buffer when disabling the
CRTC. This warrants the addition of disable function for legacy
CRTC, which puts the CRTC in DPMS-OFF state and unpins the
frame buffer if there is one associated with the CRTC.

Signed-off-by: Ilija Hadzic <ihadzic@research.bell-labs.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ilija Hadzic 2013-11-02 23:00:20 -04:00 committed by Alex Deucher
parent 75b871e2d8
commit 520a8718fe
1 changed files with 21 additions and 0 deletions
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21
drivers/gpu/drm/radeon/radeon_legacy_crtc.c
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@ -1056,6 +1056,26 @@ static void radeon_crtc_commit(struct drm_crtc *crtc)
}
}
static void radeon_crtc_disable(struct drm_crtc *crtc)
{
radeon_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
if (crtc->fb) {
int r;
struct radeon_framebuffer *radeon_fb;
struct radeon_bo *rbo;
radeon_fb = to_radeon_framebuffer(crtc->fb);
rbo = gem_to_radeon_bo(radeon_fb->obj);
r = radeon_bo_reserve(rbo, false);
if (unlikely(r))
DRM_ERROR("failed to reserve rbo before unpin\n");
else {
radeon_bo_unpin(rbo);
radeon_bo_unreserve(rbo);
}
}
}
static const struct drm_crtc_helper_funcs legacy_helper_funcs = {
.dpms = radeon_crtc_dpms,
.mode_fixup = radeon_crtc_mode_fixup,
@ -1065,6 +1085,7 @@ static const struct drm_crtc_helper_funcs legacy_helper_funcs = {
.prepare = radeon_crtc_prepare,
.commit = radeon_crtc_commit,
.load_lut = radeon_crtc_load_lut,
.disable = radeon_crtc_disable
};