diff options
| author |   Andrzej Hajda <a.hajda@samsung.com> | 2018-02-02 16:11:22 +0100 |
|---|---|---|
| committer |   Inki Dae <inki.dae@samsung.com> | 2018-05-04 09:39:59 +0900 |
| commit | 2eced8e917b060587fc8ed46df41c364957a5050 (patch) | |
| tree | 047e2fce2e73d53bc3ac7e47d5f759609bcc486b /drivers/gpu/drm/exynos/exynos_mixer.c | |
| parent | Merge branch 'vmwgfx-fixes-4.17' of git://people.freedesktop.org/~thomash/linux into drm-fixes (diff) | |
| download | wireguard-linux-2eced8e917b060587fc8ed46df41c364957a5050.tar.xz wireguard-linux-2eced8e917b060587fc8ed46df41c364957a5050.zip | |
drm/exynos/mixer: fix synchronization check in interlaced mode
In case of interlace mode video processor registers and mixer config
register must be check to ensure internal state is in sync with shadow
registers.
This patch fixes page-faults in interlaced mode.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_mixer.c')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_mixer.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c index 257299ec95c4..a8d978d6e4e0 100644 --- a/drivers/gpu/drm/exynos/exynos_mixer.c +++ b/drivers/gpu/drm/exynos/exynos_mixer.c @@ -482,6 +482,7 @@ static void vp_video_buffer(struct mixer_context *ctx, spin_lock_irqsave(&ctx->reg_slock, flags); + vp_reg_write(ctx, VP_SHADOW_UPDATE, 1); /* interlace or progressive scan mode */ val = (test_bit(MXR_BIT_INTERLACE, &ctx->flags) ? ~0 : 0); vp_reg_writemask(ctx, VP_MODE, val, VP_MODE_LINE_SKIP); @@ -699,6 +700,15 @@ static irqreturn_t mixer_irq_handler(int irq, void *arg) /* interlace scan need to check shadow register */ if (test_bit(MXR_BIT_INTERLACE, &ctx->flags)) { + if (test_bit(MXR_BIT_VP_ENABLED, &ctx->flags) && + vp_reg_read(ctx, VP_SHADOW_UPDATE)) + goto out; + + base = mixer_reg_read(ctx, MXR_CFG); + shadow = mixer_reg_read(ctx, MXR_CFG_S); + if (base != shadow) + goto out; + base = mixer_reg_read(ctx, MXR_GRAPHIC_BASE(0)); shadow = mixer_reg_read(ctx, MXR_GRAPHIC_BASE_S(0)); if (base != shadow) |