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drm/exynos: make sure that hardware overlay for hdmi is disabled

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the values set to registers will be updated into real registers
at vsync so dma operation could be malfunctioned when accessed
to memory after gem buffer was released. this patch makes sure
that hw overlay is disabled before the gem buffer is released.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
This commit is contained in:
Inki Dae
2012-08-17 18:35:47 +09:00
parent 479cbc3eee
commit 3d05859fd7
3 changed files with 25 additions and 0 deletions
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13
drivers/gpu/drm/exynos/exynos_mixer.c
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@@ -726,6 +726,18 @@ static void mixer_dpms(void *ctx, int mode)
}
}
static void mixer_wait_for_vblank(void *ctx)
{
struct mixer_context *mixer_ctx = ctx;
struct mixer_resources *res = &mixer_ctx->mixer_res;
int ret;
ret = wait_for((mixer_reg_read(res, MXR_INT_STATUS) &
MXR_INT_STATUS_VSYNC), 50);
if (ret < 0)
DRM_DEBUG_KMS("vblank wait timed out.\n");
}
static void mixer_win_mode_set(void *ctx,
struct exynos_drm_overlay *overlay)
{
@@ -818,6 +830,7 @@ static struct exynos_mixer_ops mixer_ops = {
.dpms = mixer_dpms,
/* overlay */
.wait_for_vblank = mixer_wait_for_vblank,
.win_mode_set = mixer_win_mode_set,
.win_commit = mixer_win_commit,
.win_disable = mixer_win_disable,