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Subject[PATCH 12/23] drm/sun4i: sun8i: properly support UI channels
Date
The current code has the wrong macro to get the registers offsets of the
UI-registers, with an off-by-0x1000 error.

It works so far by accident, since the UI channel used everywhere else is
the number of VI planes, which has always been 1 so far, and the offset
between two UI channels is 0x1000.

Let's correct that behaviour by setting the UI chan number in the sun8i_ui
structure, and remove the hardcoded values pretty much everywhere. Once we
have sane values, we can convert the macros to their actual definition.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---
drivers/gpu/drm/sun4i/sun8i_mixer.c | 50 ++++++++++++------------------
drivers/gpu/drm/sun4i/sun8i_mixer.h | 32 ++++++++++---------
drivers/gpu/drm/sun4i/sun8i_ui.c | 12 ++++---
drivers/gpu/drm/sun4i/sun8i_ui.h | 1 +-
4 files changed, 46 insertions(+), 49 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index 1955b2a36ac5..5afe8ef709a5 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -37,14 +37,12 @@ static void sun8i_mixer_commit(struct sunxi_engine *engine)
SUN8I_MIXER_GLOBAL_DBUFF_ENABLE);
}

-void sun8i_mixer_layer_enable(struct sun8i_mixer *mixer,
- int layer, bool enable)
+void sun8i_mixer_layer_enable(struct sun8i_mixer *mixer, struct sun8i_ui *ui,
+ bool enable)
{
u32 val;
- /* Currently the first UI channel is used */
- int chan = mixer->cfg->vi_num;

- DRM_DEBUG_DRIVER("Enabling layer %d in channel %d\n", layer, chan);
+ DRM_DEBUG_DRIVER("Enabling layer %d in channel %d\n", ui->id, ui->chan);

if (enable)
val = SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN;
@@ -52,16 +50,16 @@ void sun8i_mixer_layer_enable(struct sun8i_mixer *mixer,
val = 0;

regmap_update_bits(mixer->engine.regs,
- SUN8I_MIXER_CHAN_UI_LAYER_ATTR(chan, layer),
+ SUN8I_MIXER_CHAN_UI_LAYER_ATTR(ui->chan, ui->id),
SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN, val);

/* Set the alpha configuration */
regmap_update_bits(mixer->engine.regs,
- SUN8I_MIXER_CHAN_UI_LAYER_ATTR(chan, layer),
+ SUN8I_MIXER_CHAN_UI_LAYER_ATTR(ui->chan, ui->id),
SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_MODE_MASK,
SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_MODE_DEF);
regmap_update_bits(mixer->engine.regs,
- SUN8I_MIXER_CHAN_UI_LAYER_ATTR(chan, layer),
+ SUN8I_MIXER_CHAN_UI_LAYER_ATTR(ui->chan, ui->id),
SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_MASK,
SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_DEF);
}
@@ -90,14 +88,13 @@ static int sun8i_mixer_drm_format_to_layer(struct drm_plane *plane,
}

int sun8i_mixer_update_layer_coord(struct sun8i_mixer *mixer,
- int layer, struct drm_plane *plane)
+ struct sun8i_ui *ui)
{
+ struct drm_plane *plane = &ui->plane;
struct drm_plane_state *state = plane->state;
struct drm_framebuffer *fb = state->fb;
- /* Currently the first UI channel is used */
- int chan = mixer->cfg->vi_num;

- DRM_DEBUG_DRIVER("Updating layer %d\n", layer);
+ DRM_DEBUG_DRIVER("Updating layer %d\n", ui->id);

if (plane->type == DRM_PLANE_TYPE_PRIMARY) {
DRM_DEBUG_DRIVER("Primary layer, updating global size W: %u H: %u\n",
@@ -115,7 +112,7 @@ int sun8i_mixer_update_layer_coord(struct sun8i_mixer *mixer,
state->crtc_h));
DRM_DEBUG_DRIVER("Updating channel size\n");
regmap_write(mixer->engine.regs,
- SUN8I_MIXER_CHAN_UI_OVL_SIZE(chan),
+ SUN8I_MIXER_CHAN_UI_OVL_SIZE(ui->chan),
SUN8I_MIXER_SIZE(state->crtc_w,
state->crtc_h));
}
@@ -123,35 +120,34 @@ int sun8i_mixer_update_layer_coord(struct sun8i_mixer *mixer,
/* Set the line width */
DRM_DEBUG_DRIVER("Layer line width: %d bytes\n", fb->pitches[0]);
regmap_write(mixer->engine.regs,
- SUN8I_MIXER_CHAN_UI_LAYER_PITCH(chan, layer),
+ SUN8I_MIXER_CHAN_UI_LAYER_PITCH(ui->chan, ui->id),
fb->pitches[0]);

/* Set height and width */
DRM_DEBUG_DRIVER("Layer size W: %u H: %u\n",
state->crtc_w, state->crtc_h);
regmap_write(mixer->engine.regs,
- SUN8I_MIXER_CHAN_UI_LAYER_SIZE(chan, layer),
+ SUN8I_MIXER_CHAN_UI_LAYER_SIZE(ui->chan, ui->id),
SUN8I_MIXER_SIZE(state->crtc_w, state->crtc_h));

/* Set base coordinates */
DRM_DEBUG_DRIVER("Layer coordinates X: %d Y: %d\n",
state->crtc_x, state->crtc_y);
regmap_write(mixer->engine.regs,
- SUN8I_MIXER_CHAN_UI_LAYER_COORD(chan, layer),
+ SUN8I_MIXER_CHAN_UI_LAYER_COORD(ui->chan, ui->id),
SUN8I_MIXER_COORD(state->crtc_x, state->crtc_y));

return 0;
}

int sun8i_mixer_update_layer_formats(struct sun8i_mixer *mixer,
- int layer, struct drm_plane *plane)
+ struct sun8i_ui *ui)
{
+ struct drm_plane *plane = &ui->plane;
struct drm_plane_state *state = plane->state;
struct drm_framebuffer *fb = state->fb;
bool interlaced = false;
u32 val;
- /* Currently the first UI channel is used */
- int chan = mixer->cfg->vi_num;
int ret;

if (plane->state->crtc)
@@ -174,21 +170,20 @@ int sun8i_mixer_update_layer_formats(struct sun8i_mixer *mixer,
}

regmap_update_bits(mixer->engine.regs,
- SUN8I_MIXER_CHAN_UI_LAYER_ATTR(chan, layer),
+ SUN8I_MIXER_CHAN_UI_LAYER_ATTR(ui->chan, ui->id),
SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_MASK, val);

return 0;
}

int sun8i_mixer_update_layer_buffer(struct sun8i_mixer *mixer,
- int layer, struct drm_plane *plane)
+ struct sun8i_ui *ui)
{
+ struct drm_plane *plane = &ui->plane;
struct drm_plane_state *state = plane->state;
struct drm_framebuffer *fb = state->fb;
struct drm_gem_cma_object *gem;
dma_addr_t paddr;
- /* Currently the first UI channel is used */
- int chan = mixer->cfg->vi_num;
int bpp;

/* Get the physical address of the buffer in memory */
@@ -220,7 +215,7 @@ int sun8i_mixer_update_layer_buffer(struct sun8i_mixer *mixer,
DRM_DEBUG_DRIVER("Setting buffer address to %pad\n", &paddr);

regmap_write(mixer->engine.regs,
- SUN8I_MIXER_CHAN_UI_LAYER_TOP_LADDR(chan, layer),
+ SUN8I_MIXER_CHAN_UI_LAYER_TOP_LADDR(ui->chan, ui->id),
lower_32_bits(paddr));

return 0;
@@ -342,11 +337,8 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
SUN8I_MIXER_BLEND_ATTR_FCOLOR_DEF);

/* Select the first UI channel */
- DRM_DEBUG_DRIVER("Selecting channel %d (first UI channel)\n",
- mixer->cfg->vi_num);
- regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_ROUTE,
- mixer->cfg->vi_num);
-
+ DRM_DEBUG_DRIVER("Selecting channel %d (first UI channel)\n", 1);
+ regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_ROUTE, 1);
return 0;

err_disable_bus_clk:
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h b/drivers/gpu/drm/sun4i/sun8i_mixer.h
index 4785ac090b8c..20d2ee1c4187 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.h
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h
@@ -61,22 +61,22 @@
*/

#define SUN8I_MIXER_CHAN_UI_LAYER_ATTR(ch, layer) \
- (0x2000 + 0x1000 * (ch) + 0x20 * (layer) + 0x0)
+ (0x3000 + 0x1000 * (ch) + 0x20 * (layer) + 0x0)
#define SUN8I_MIXER_CHAN_UI_LAYER_SIZE(ch, layer) \
- (0x2000 + 0x1000 * (ch) + 0x20 * (layer) + 0x4)
+ (0x3000 + 0x1000 * (ch) + 0x20 * (layer) + 0x4)
#define SUN8I_MIXER_CHAN_UI_LAYER_COORD(ch, layer) \
- (0x2000 + 0x1000 * (ch) + 0x20 * (layer) + 0x8)
+ (0x3000 + 0x1000 * (ch) + 0x20 * (layer) + 0x8)
#define SUN8I_MIXER_CHAN_UI_LAYER_PITCH(ch, layer) \
- (0x2000 + 0x1000 * (ch) + 0x20 * (layer) + 0xc)
+ (0x3000 + 0x1000 * (ch) + 0x20 * (layer) + 0xc)
#define SUN8I_MIXER_CHAN_UI_LAYER_TOP_LADDR(ch, layer) \
- (0x2000 + 0x1000 * (ch) + 0x20 * (layer) + 0x10)
+ (0x3000 + 0x1000 * (ch) + 0x20 * (layer) + 0x10)
#define SUN8I_MIXER_CHAN_UI_LAYER_BOT_LADDR(ch, layer) \
- (0x2000 + 0x1000 * (ch) + 0x20 * (layer) + 0x14)
+ (0x3000 + 0x1000 * (ch) + 0x20 * (layer) + 0x14)
#define SUN8I_MIXER_CHAN_UI_LAYER_FCOLOR(ch, layer) \
- (0x2000 + 0x1000 * (ch) + 0x20 * (layer) + 0x18)
-#define SUN8I_MIXER_CHAN_UI_TOP_HADDR(ch) (0x2000 + 0x1000 * (ch) + 0x80)
-#define SUN8I_MIXER_CHAN_UI_BOT_HADDR(ch) (0x2000 + 0x1000 * (ch) + 0x84)
-#define SUN8I_MIXER_CHAN_UI_OVL_SIZE(ch) (0x2000 + 0x1000 * (ch) + 0x88)
+ (0x3000 + 0x1000 * (ch) + 0x20 * (layer) + 0x18)
+#define SUN8I_MIXER_CHAN_UI_TOP_HADDR(ch) (0x3000 + 0x1000 * (ch) + 0x80)
+#define SUN8I_MIXER_CHAN_UI_BOT_HADDR(ch) (0x3000 + 0x1000 * (ch) + 0x84)
+#define SUN8I_MIXER_CHAN_UI_OVL_SIZE(ch) (0x3000 + 0x1000 * (ch) + 0x88)

#define SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN BIT(0)
#define SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_MODE_MASK GENMASK(2, 1)
@@ -104,6 +104,8 @@
#define SUN8I_MIXER_FCC_EN 0xaa000
#define SUN8I_MIXER_DCSC_EN 0xb0000

+struct sun8i_ui;
+
struct sun8i_mixer_cfg {
int vi_num;
int ui_num;
@@ -126,12 +128,12 @@ engine_to_sun8i_mixer(struct sunxi_engine *engine)
return container_of(engine, struct sun8i_mixer, engine);
}

-void sun8i_mixer_layer_enable(struct sun8i_mixer *mixer,
- int layer, bool enable);
+void sun8i_mixer_layer_enable(struct sun8i_mixer *mixer, struct sun8i_ui *ui,
+ bool enable);
int sun8i_mixer_update_layer_coord(struct sun8i_mixer *mixer,
- int layer, struct drm_plane *plane);
+ struct sun8i_ui *ui);
int sun8i_mixer_update_layer_formats(struct sun8i_mixer *mixer,
- int layer, struct drm_plane *plane);
+ struct sun8i_ui *ui);
int sun8i_mixer_update_layer_buffer(struct sun8i_mixer *mixer,
- int layer, struct drm_plane *plane);
+ struct sun8i_ui *ui);
#endif /* _SUN8I_MIXER_H_ */
diff --git a/drivers/gpu/drm/sun4i/sun8i_ui.c b/drivers/gpu/drm/sun4i/sun8i_ui.c
index 077099ef565a..a056bb0c63c7 100644
--- a/drivers/gpu/drm/sun4i/sun8i_ui.c
+++ b/drivers/gpu/drm/sun4i/sun8i_ui.c
@@ -32,7 +32,7 @@ static void sun8i_mixer_ui_atomic_disable(struct drm_plane *plane,
struct sun8i_ui *ui = plane_to_sun8i_ui(plane);
struct sun8i_mixer *mixer = ui->mixer;

- sun8i_mixer_layer_enable(mixer, ui->id, false);
+ sun8i_mixer_layer_enable(mixer, ui, false);
}

static void sun8i_mixer_ui_atomic_update(struct drm_plane *plane,
@@ -41,10 +41,10 @@ static void sun8i_mixer_ui_atomic_update(struct drm_plane *plane,
struct sun8i_ui *ui = plane_to_sun8i_ui(plane);
struct sun8i_mixer *mixer = ui->mixer;

- sun8i_mixer_update_layer_coord(mixer, ui->id, plane);
- sun8i_mixer_update_layer_formats(mixer, ui->id, plane);
- sun8i_mixer_update_layer_buffer(mixer, ui->id, plane);
- sun8i_mixer_layer_enable(mixer, ui->id, true);
+ sun8i_mixer_update_layer_coord(mixer, ui);
+ sun8i_mixer_update_layer_formats(mixer, ui);
+ sun8i_mixer_update_layer_buffer(mixer, ui);
+ sun8i_mixer_layer_enable(mixer, ui, true);
}

static struct drm_plane_helper_funcs sun8i_mixer_ui_helper_funcs = {
@@ -126,6 +126,8 @@ struct drm_plane **sun8i_ui_init(struct drm_device *drm,
return ERR_CAST(ui);
};

+ /* TODO: Support several UI channels */
+ ui->chan = 0;
ui->id = i;
planes[i] = &ui->plane;
};
diff --git a/drivers/gpu/drm/sun4i/sun8i_ui.h b/drivers/gpu/drm/sun4i/sun8i_ui.h
index 17dfc92ccc9f..3c3185878ad1 100644
--- a/drivers/gpu/drm/sun4i/sun8i_ui.h
+++ b/drivers/gpu/drm/sun4i/sun8i_ui.h
@@ -22,6 +22,7 @@ struct sun8i_ui {
struct drm_plane plane;
struct sun4i_drv *drv;
struct sun8i_mixer *mixer;
+ u8 chan;
int id;
};

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