From 24e0d4058eff7cdf66976c66be42ac89f94d1d16 Mon Sep 17 00:00:00 2001 From: Neil Armstrong Date: Mon, 21 Oct 2019 11:15:08 +0200 Subject: [PATCH] drm/meson: hold 32 lines after vsync to give time for AFBC start When using an AFBC encoded frame, the AFBC Decoder must be reset, configured and enabled at each vsync IRQ. To leave time for that, use the maximum lines hold time to give time for AFBC setup and avoid visual glitches. Signed-off-by: Neil Armstrong Reviewed-by: Kevin Hilman [narmstrong: fix typo in commit log] Link: https://patchwork.freedesktop.org/patch/msgid/20191021091509.3864-9-narmstrong@baylibre.com --- drivers/gpu/drm/meson/meson_viu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/meson/meson_viu.c b/drivers/gpu/drm/meson/meson_viu.c index fc24624..304f8ff 100644 --- a/drivers/gpu/drm/meson/meson_viu.c +++ b/drivers/gpu/drm/meson/meson_viu.c @@ -438,7 +438,7 @@ void meson_viu_init(struct meson_drm *priv) /* Initialize OSD1 fifo control register */ reg = VIU_OSD_DDR_PRIORITY_URGENT | - VIU_OSD_HOLD_FIFO_LINES(4) | + VIU_OSD_HOLD_FIFO_LINES(31) | VIU_OSD_FIFO_DEPTH_VAL(32) | /* fifo_depth_val: 32*8=256 */ VIU_OSD_WORDS_PER_BURST(4) | /* 4 words in 1 burst */ VIU_OSD_FIFO_LIMITS(2); /* fifo_lim: 2*16=32 */ -- 2.7.4