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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>
This commit is contained in:
Andrzej Hajda 2018-02-02 16:11:22 +01:00 committed by Inki Dae
parent a02cbe2e34
commit 2eced8e917
2 changed files with 11 additions and 0 deletions
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10
drivers/gpu/drm/exynos/exynos_mixer.c
View File

@ -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)

1
drivers/gpu/drm/exynos/regs-mixer.h
View File

@ -47,6 +47,7 @@
#define MXR_MO 0x0304
#define MXR_RESOLUTION 0x0310
#define MXR_CFG_S 0x2004
#define MXR_GRAPHIC0_BASE_S 0x2024
#define MXR_GRAPHIC1_BASE_S 0x2044