67 lines
2.7 KiB
Diff
67 lines
2.7 KiB
Diff
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From 021a8fd2d86c8a6319baf1c9c89ccd15db066b81 Mon Sep 17 00:00:00 2001
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From: Ondrej Jirman <megous@megous.com>
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Date: Tue, 28 Jan 2020 00:26:17 +0100
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Subject: [PATCH 227/351] drm: sun4i-drm: Recover from occasional HW failures
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Layer can be disabled automatically by HW (HW clears the bit in
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some unknown situations). We need to always update this bit,
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so that DE2 will not fail.
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Signed-off-by: Ondrej Jirman <megous@megous.com>
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---
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drivers/gpu/drm/sun4i/sun8i_ui_layer.c | 13 ++++++-------
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drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 13 ++++++-------
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2 files changed, 12 insertions(+), 14 deletions(-)
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diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
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index f1c87695b4d7..e58482f6d7ba 100644
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--- a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
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+++ b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
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@@ -36,13 +36,12 @@ static void sun8i_ui_layer_enable(struct sun8i_mixer *mixer, int channel,
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DRM_DEBUG_DRIVER("%sabling channel %d overlay %d\n",
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enable ? "En" : "Dis", channel, overlay);
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- if (!was_enabled != !enable) {
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- val = enable ? SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN : 0;
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-
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- regmap_update_bits(mixer->engine.regs,
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- SUN8I_MIXER_CHAN_UI_LAYER_ATTR(ch_base, overlay),
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- SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN, val);
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- }
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+ /* We always update the layer enable bit, because it can clear
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+ * spontaneously for unknown reasons. */
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+ val = enable ? SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN : 0;
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+ regmap_update_bits(mixer->engine.regs,
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+ SUN8I_MIXER_CHAN_UI_LAYER_ATTR(ch_base, overlay),
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+ SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN, val);
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/*
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* If this layer was enabled and is being disabled or if it is
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diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
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index 81eda71c4fff..0c2ccc33d456 100644
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--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
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+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
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@@ -30,13 +30,12 @@ static void sun8i_vi_layer_enable(struct sun8i_mixer *mixer, int channel,
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DRM_DEBUG_DRIVER("%sabling VI channel %d overlay %d\n",
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enable ? "En" : "Dis", channel, overlay);
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- if (!was_enabled != !enable) {
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- val = enable ? SUN8I_MIXER_CHAN_VI_LAYER_ATTR_EN : 0;
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-
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- regmap_update_bits(mixer->engine.regs,
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- SUN8I_MIXER_CHAN_VI_LAYER_ATTR(ch_base, overlay),
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- SUN8I_MIXER_CHAN_VI_LAYER_ATTR_EN, val);
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- }
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+ /* We always update the layer enable bit, because it can clear
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+ * spontaneously for unknown reasons. */
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+ val = enable ? SUN8I_MIXER_CHAN_VI_LAYER_ATTR_EN : 0;
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+ regmap_update_bits(mixer->engine.regs,
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+ SUN8I_MIXER_CHAN_VI_LAYER_ATTR(ch_base, overlay),
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+ SUN8I_MIXER_CHAN_VI_LAYER_ATTR_EN, val);
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/*
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* If this layer was enabled and is being disabled or if it is
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--
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2.34.0
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