[PATCH v2 12/29] drm/sun4i: Disable unused DE2 sub-engines
From: Jernej Skrabec <hidden>
Date: 2018-10-07 09:41:38
Also in:
dri-devel, linux-clk, linux-devicetree, lkml
Subsystem:
drm driver for allwinner de2 and de3 engine, drm drivers, drm drivers and misc gpu patches, drm drivers for allwinner a10, the rest · Maintainers:
Chen-Yu Tsai, David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Linus Torvalds
Some sub-engines are unused. Disable them explicitly. Signed-off-by: Jernej Skrabec <redacted> --- drivers/gpu/drm/sun4i/sun8i_mixer.c | 8 ++++++++ drivers/gpu/drm/sun4i/sun8i_mixer.h | 4 ++-- 2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index 7beb3065a522..2cb24d987005 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c@@ -462,6 +462,14 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master, /* Reset the registers */ for (i = 0; i < DE2_MIXER_UNIT_SIZE; i += 4) regmap_write(mixer->engine.regs, i, 0); + /* Disable unused sub-engines */ + regmap_write(mixer->engine.regs, DE2_MIXER_FCE_EN, 0); + regmap_write(mixer->engine.regs, DE2_MIXER_BWS_EN, 0); + regmap_write(mixer->engine.regs, DE2_MIXER_LTI_EN, 0); + regmap_write(mixer->engine.regs, DE2_MIXER_PEAK_EN, 0); + regmap_write(mixer->engine.regs, DE2_MIXER_ASE_EN, 0); + regmap_write(mixer->engine.regs, DE2_MIXER_FCC_EN, 0); + regmap_write(mixer->engine.regs, DE2_MIXER_DCSC_EN, 0); /* Enable the mixer */ regmap_write(mixer->engine.regs, DE2_MIXER_GLOBAL_CTL,
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h b/drivers/gpu/drm/sun4i/sun8i_mixer.h
index e2aa42e8f715..f26ee6af6cba 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.h
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h@@ -101,8 +101,8 @@ #define DE2_MIXER_FBFMT_YUV411 14 /* - * These sub-engines are still unknown now, the EN registers are here only to - * be used to disable these sub-engines. + * Sub-engines listed bellow are unused for now. The EN registers are here only + * to be used to disable these sub-engines. */ #define DE2_MIXER_FCE_EN 0xa0000 #define DE2_MIXER_BWS_EN 0xa2000
--
2.19.0