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drm/exynos/mixer: correct vsync configuration sequence 

Specification advises to clear vsync indicator before configuring vsync.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Andrzej Hajda 2015-07-09 08:25:40 +02:00 committed by Inki Dae
parent 81a464df5c
commit fc073248ce
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/exynos/exynos_mixer.c
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@ -906,8 +906,8 @@ static int mixer_enable_vblank(struct exynos_drm_crtc *crtc)
}
/* enable vsync interrupt */
mixer_reg_writemask(res, MXR_INT_EN, MXR_INT_EN_VSYNC,
MXR_INT_EN_VSYNC);
mixer_reg_writemask(res, MXR_INT_STATUS, ~0, MXR_INT_CLEAR_VSYNC);
mixer_reg_writemask(res, MXR_INT_EN, ~0, MXR_INT_EN_VSYNC);
return 0;
}
@ -918,6 +918,7 @@ static void mixer_disable_vblank(struct exynos_drm_crtc *crtc)
struct mixer_resources *res = &mixer_ctx->mixer_res;
/* disable vsync interrupt */
mixer_reg_writemask(res, MXR_INT_STATUS, ~0, MXR_INT_CLEAR_VSYNC);
mixer_reg_writemask(res, MXR_INT_EN, 0, MXR_INT_EN_VSYNC);
}
@ -1046,6 +1047,8 @@ static void mixer_enable(struct exynos_drm_crtc *crtc)
mixer_reg_writemask(res, MXR_STATUS, ~0, MXR_STATUS_SOFT_RESET);
if (ctx->int_en & MXR_INT_EN_VSYNC)
mixer_reg_writemask(res, MXR_INT_STATUS, ~0, MXR_INT_CLEAR_VSYNC);
mixer_reg_write(res, MXR_INT_EN, ctx->int_en);
mixer_win_reset(ctx);
}