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Allwinner: Fix DRM driver bugs

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This commit is contained in:
Jernej Skrabec 2020-07-19 13:32:22 +02:00
parent 927ff1f56e
commit cd30f680d9
1 changed files with 389 additions and 0 deletions
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projects/Allwinner/patches/linux/0007-drm-fixes.patch Normal file
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@ -0,0 +1,389 @@
From 8132877d34935f3d0a2c661f00f67f782b6bc8f8 Mon Sep 17 00:00:00 2001
From: Roman Stratiienko <roman.stratiienko@globallogic.com>
Date: Sat, 28 Dec 2019 22:28:17 +0200
Subject: [PATCH 1/3] drm/sun4i: Reimplement plane z position setting logic
To set blending channel order register software needs to know state and
position of each channel, which impossible at plane commit stage.
Move this procedure to atomic_flush stage, where all necessary information
is available.
Signed-off-by: Roman Stratiienko <roman.stratiienko@globallogic.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
drivers/gpu/drm/sun4i/sun8i_mixer.c | 43 ++++++++++++++++++++++++--
drivers/gpu/drm/sun4i/sun8i_mixer.h | 5 +++
drivers/gpu/drm/sun4i/sun8i_ui_layer.c | 42 ++++---------------------
drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 39 +++--------------------
4 files changed, 57 insertions(+), 72 deletions(-)
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index cc4fb916318f..1ad704b737cf 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -250,8 +250,45 @@ int sun8i_mixer_drm_format_to_hw(u32 format, u32 *hw_format)
static void sun8i_mixer_commit(struct sunxi_engine *engine)
{
+ struct sun8i_mixer *mixer = engine_to_sun8i_mixer(engine);
+ int channel_by_zpos[SUN8I_MIXER_MAX_CHANNELS];
+ u32 base = sun8i_blender_base(mixer);
+ u32 route = 0, pipe_ctl = 0;
+ unsigned int channel_count;
+ int i, j;
+
+ channel_count = mixer->cfg->vi_num + mixer->cfg->ui_num;
+
+ DRM_DEBUG_DRIVER("Update blender routing\n");
+
+ for (i = 0; i < SUN8I_MIXER_MAX_CHANNELS; i++)
+ channel_by_zpos[i] = -1;
+
+ for (i = 0; i < channel_count; i++) {
+ int zpos = mixer->channel_zpos[i];
+
+ if (zpos >= 0 && zpos < channel_count)
+ channel_by_zpos[zpos] = i;
+ }
+
+ j = 0;
+ for (i = 0; i < channel_count; i++) {
+ int ch = channel_by_zpos[i];
+
+ if (ch >= 0) {
+ pipe_ctl |= SUN8I_MIXER_BLEND_PIPE_CTL_EN(j);
+ route |= ch << SUN8I_MIXER_BLEND_ROUTE_PIPE_SHIFT(j);
+ j++;
+ }
+ }
+
+ regmap_update_bits(mixer->engine.regs, SUN8I_MIXER_BLEND_PIPE_CTL(base),
+ SUN8I_MIXER_BLEND_PIPE_CTL_EN_MSK, pipe_ctl);
+
+ regmap_write(mixer->engine.regs,
+ SUN8I_MIXER_BLEND_ROUTE(base), route);
+
DRM_DEBUG_DRIVER("Committing changes\n");
-
regmap_write(engine->regs, SUN8I_MIXER_GLOBAL_DBUFF,
SUN8I_MIXER_GLOBAL_DBUFF_ENABLE);
}
@@ -489,10 +526,12 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
SUN8I_MIXER_BLEND_COLOR_BLACK);
plane_cnt = mixer->cfg->vi_num + mixer->cfg->ui_num;
- for (i = 0; i < plane_cnt; i++)
+ for (i = 0; i < plane_cnt; i++) {
regmap_write(mixer->engine.regs,
SUN8I_MIXER_BLEND_MODE(base, i),
SUN8I_MIXER_BLEND_MODE_DEF);
+ mixer->channel_zpos[i] = -1;
+ }
regmap_update_bits(mixer->engine.regs, SUN8I_MIXER_BLEND_PIPE_CTL(base),
SUN8I_MIXER_BLEND_PIPE_CTL_EN_MSK, 0);
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h b/drivers/gpu/drm/sun4i/sun8i_mixer.h
index 7576b523fdbb..7b378d6e4dd9 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.h
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h
@@ -12,6 +12,8 @@
#include "sunxi_engine.h"
+#define SUN8I_MIXER_MAX_CHANNELS 5
+
#define SUN8I_MIXER_SIZE(w, h) (((h) - 1) << 16 | ((w) - 1))
#define SUN8I_MIXER_COORD(x, y) ((y) << 16 | (x))
@@ -179,6 +181,9 @@ struct sun8i_mixer {
struct clk *bus_clk;
struct clk *mod_clk;
+
+ /* -1 means that layer is disabled */
+ int channel_zpos[SUN8I_MIXER_MAX_CHANNELS];
};
static inline struct sun8i_mixer *
diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
index 54f937a7d5e7..651d3bf096c6 100644
--- a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
@@ -24,12 +24,10 @@
#include "sun8i_ui_scaler.h"
static void sun8i_ui_layer_enable(struct sun8i_mixer *mixer, int channel,
- int overlay, bool enable, unsigned int zpos,
- unsigned int old_zpos)
+ int overlay, bool enable, unsigned int zpos)
{
- u32 val, bld_base, ch_base;
+ u32 val, ch_base;
- bld_base = sun8i_blender_base(mixer);
ch_base = sun8i_channel_base(mixer, channel);
DRM_DEBUG_DRIVER("%sabling channel %d overlay %d\n",
@@ -44,32 +42,7 @@ static void sun8i_ui_layer_enable(struct sun8i_mixer *mixer, int channel,
SUN8I_MIXER_CHAN_UI_LAYER_ATTR(ch_base, overlay),
SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN, val);
- if (!enable || zpos != old_zpos) {
- regmap_update_bits(mixer->engine.regs,
- SUN8I_MIXER_BLEND_PIPE_CTL(bld_base),
- SUN8I_MIXER_BLEND_PIPE_CTL_EN(old_zpos),
- 0);
-
- regmap_update_bits(mixer->engine.regs,
- SUN8I_MIXER_BLEND_ROUTE(bld_base),
- SUN8I_MIXER_BLEND_ROUTE_PIPE_MSK(old_zpos),
- 0);
- }
-
- if (enable) {
- val = SUN8I_MIXER_BLEND_PIPE_CTL_EN(zpos);
-
- regmap_update_bits(mixer->engine.regs,
- SUN8I_MIXER_BLEND_PIPE_CTL(bld_base),
- val, val);
-
- val = channel << SUN8I_MIXER_BLEND_ROUTE_PIPE_SHIFT(zpos);
-
- regmap_update_bits(mixer->engine.regs,
- SUN8I_MIXER_BLEND_ROUTE(bld_base),
- SUN8I_MIXER_BLEND_ROUTE_PIPE_MSK(zpos),
- val);
- }
+ mixer->channel_zpos[channel] = enable ? zpos : -1;
}
static int sun8i_ui_layer_update_coord(struct sun8i_mixer *mixer, int channel,
@@ -267,11 +240,9 @@ static void sun8i_ui_layer_atomic_disable(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
struct sun8i_ui_layer *layer = plane_to_sun8i_ui_layer(plane);
- unsigned int old_zpos = old_state->normalized_zpos;
struct sun8i_mixer *mixer = layer->mixer;
- sun8i_ui_layer_enable(mixer, layer->channel, layer->overlay, false, 0,
- old_zpos);
+ sun8i_ui_layer_enable(mixer, layer->channel, layer->overlay, false, 0);
}
static void sun8i_ui_layer_atomic_update(struct drm_plane *plane,
@@ -279,12 +250,11 @@ static void sun8i_ui_layer_atomic_update(struct drm_plane *plane,
{
struct sun8i_ui_layer *layer = plane_to_sun8i_ui_layer(plane);
unsigned int zpos = plane->state->normalized_zpos;
- unsigned int old_zpos = old_state->normalized_zpos;
struct sun8i_mixer *mixer = layer->mixer;
if (!plane->state->visible) {
sun8i_ui_layer_enable(mixer, layer->channel,
- layer->overlay, false, 0, old_zpos);
+ layer->overlay, false, 0);
return;
}
@@ -295,7 +265,7 @@ static void sun8i_ui_layer_atomic_update(struct drm_plane *plane,
sun8i_ui_layer_update_buffer(mixer, layer->channel,
layer->overlay, plane);
sun8i_ui_layer_enable(mixer, layer->channel, layer->overlay,
- true, zpos, old_zpos);
+ true, zpos);
}
static struct drm_plane_helper_funcs sun8i_ui_layer_helper_funcs = {
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
index 22c8c5375d0d..bd28e76363d9 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -18,8 +18,7 @@
#include "sun8i_vi_scaler.h"
static void sun8i_vi_layer_enable(struct sun8i_mixer *mixer, int channel,
- int overlay, bool enable, unsigned int zpos,
- unsigned int old_zpos)
+ int overlay, bool enable, unsigned int zpos)
{
u32 val, bld_base, ch_base;
@@ -38,32 +37,7 @@ static void sun8i_vi_layer_enable(struct sun8i_mixer *mixer, int channel,
SUN8I_MIXER_CHAN_VI_LAYER_ATTR(ch_base, overlay),
SUN8I_MIXER_CHAN_VI_LAYER_ATTR_EN, val);
- if (!enable || zpos != old_zpos) {
- regmap_update_bits(mixer->engine.regs,
- SUN8I_MIXER_BLEND_PIPE_CTL(bld_base),
- SUN8I_MIXER_BLEND_PIPE_CTL_EN(old_zpos),
- 0);
-
- regmap_update_bits(mixer->engine.regs,
- SUN8I_MIXER_BLEND_ROUTE(bld_base),
- SUN8I_MIXER_BLEND_ROUTE_PIPE_MSK(old_zpos),
- 0);
- }
-
- if (enable) {
- val = SUN8I_MIXER_BLEND_PIPE_CTL_EN(zpos);
-
- regmap_update_bits(mixer->engine.regs,
- SUN8I_MIXER_BLEND_PIPE_CTL(bld_base),
- val, val);
-
- val = channel << SUN8I_MIXER_BLEND_ROUTE_PIPE_SHIFT(zpos);
-
- regmap_update_bits(mixer->engine.regs,
- SUN8I_MIXER_BLEND_ROUTE(bld_base),
- SUN8I_MIXER_BLEND_ROUTE_PIPE_MSK(zpos),
- val);
- }
+ mixer->channel_zpos[channel] = enable ? zpos : -1;
}
static int sun8i_vi_layer_update_coord(struct sun8i_mixer *mixer, int channel,
@@ -370,11 +344,9 @@ static void sun8i_vi_layer_atomic_disable(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
struct sun8i_vi_layer *layer = plane_to_sun8i_vi_layer(plane);
- unsigned int old_zpos = old_state->normalized_zpos;
struct sun8i_mixer *mixer = layer->mixer;
- sun8i_vi_layer_enable(mixer, layer->channel, layer->overlay, false, 0,
- old_zpos);
+ sun8i_vi_layer_enable(mixer, layer->channel, layer->overlay, false, 0);
}
static void sun8i_vi_layer_atomic_update(struct drm_plane *plane,
@@ -382,12 +354,11 @@ static void sun8i_vi_layer_atomic_update(struct drm_plane *plane,
{
struct sun8i_vi_layer *layer = plane_to_sun8i_vi_layer(plane);
unsigned int zpos = plane->state->normalized_zpos;
- unsigned int old_zpos = old_state->normalized_zpos;
struct sun8i_mixer *mixer = layer->mixer;
if (!plane->state->visible) {
sun8i_vi_layer_enable(mixer, layer->channel,
- layer->overlay, false, 0, old_zpos);
+ layer->overlay, false, 0);
return;
}
@@ -398,7 +369,7 @@ static void sun8i_vi_layer_atomic_update(struct drm_plane *plane,
sun8i_vi_layer_update_buffer(mixer, layer->channel,
layer->overlay, plane);
sun8i_vi_layer_enable(mixer, layer->channel, layer->overlay,
- true, zpos, old_zpos);
+ true, zpos);
}
static struct drm_plane_helper_funcs sun8i_vi_layer_helper_funcs = {
--
2.27.0
From 9d11b18afdb63d60714a78c5966f674aa66ee6b9 Mon Sep 17 00:00:00 2001
From: Jernej Skrabec <jernej.skrabec@siol.net>
Date: Sun, 19 Jul 2020 11:28:49 +0200
Subject: [PATCH 2/3] drm/sun4i: Don't use update regmap variant for blend pipe
register
Readout might return invalid value, so always write it.
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
drivers/gpu/drm/sun4i/sun8i_mixer.c | 19 ++++++++-----------
1 file changed, 8 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index 1ad704b737cf..8825518e06c8 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -282,8 +282,14 @@ static void sun8i_mixer_commit(struct sunxi_engine *engine)
}
}
- regmap_update_bits(mixer->engine.regs, SUN8I_MIXER_BLEND_PIPE_CTL(base),
- SUN8I_MIXER_BLEND_PIPE_CTL_EN_MSK, pipe_ctl);
+ /*
+ * Set fill color of bottom plane to black. Generally not needed
+ * except when VI plane is at bottom (zpos = 0) and enabled.
+ */
+ pipe_ctl |= SUN8I_MIXER_BLEND_PIPE_CTL_FC_EN(0);
+
+ regmap_write(mixer->engine.regs,
+ SUN8I_MIXER_BLEND_PIPE_CTL(base), pipe_ctl);
regmap_write(mixer->engine.regs,
SUN8I_MIXER_BLEND_ROUTE(base), route);
@@ -516,12 +522,6 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_BKCOLOR(base),
SUN8I_MIXER_BLEND_COLOR_BLACK);
- /*
- * Set fill color of bottom plane to black. Generally not needed
- * except when VI plane is at bottom (zpos = 0) and enabled.
- */
- regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_PIPE_CTL(base),
- SUN8I_MIXER_BLEND_PIPE_CTL_FC_EN(0));
regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_ATTR_FCOLOR(base, 0),
SUN8I_MIXER_BLEND_COLOR_BLACK);
@@ -533,9 +533,6 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
mixer->channel_zpos[i] = -1;
}
- regmap_update_bits(mixer->engine.regs, SUN8I_MIXER_BLEND_PIPE_CTL(base),
- SUN8I_MIXER_BLEND_PIPE_CTL_EN_MSK, 0);
-
return 0;
err_disable_bus_clk:
--
2.27.0
From bb41e6a8620fc7c3fd91be8155ef5972ea04c0c8 Mon Sep 17 00:00:00 2001
From: Jernej Skrabec <jernej.skrabec@siol.net>
Date: Sun, 19 Jul 2020 11:37:41 +0200
Subject: [PATCH 3/3] drm/sun4i: mixer: Add caching support
Most registers are not safe to read out so enable cache in regmap.
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
drivers/gpu/drm/sun4i/sun8i_mixer.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index 8825518e06c8..006b746b0e95 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -346,11 +346,23 @@ static const struct sunxi_engine_ops sun8i_engine_ops = {
.layers_init = sun8i_layers_init,
};
+static bool sun8i_mixer_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SUN8I_MIXER_GLOBAL_STATUS:
+ case SUN8I_MIXER_GLOBAL_DBUFF:
+ return true;
+ }
+ return false;
+}
+
static struct regmap_config sun8i_mixer_regmap_config = {
+ .cache_type = REGCACHE_FLAT,
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
.max_register = 0xbfffc, /* guessed */
+ .volatile_reg = sun8i_mixer_volatile_reg,
};
static int sun8i_mixer_of_get_id(struct device_node *node)
--
2.27.0