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Date: Tue, 20 Jan 2015 11:48:53 +0100
From: Thierry Reding <thierry.reding@...il.com>
To: dri-devel@...ts.freedesktop.org
Cc: linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 34/36] drm/tegra: Track active planes in CRTC state
From: Thierry Reding <treding@...dia.com>
Wrap struct drm_crtc_state in a driver-specific structure and add the
planes field which keeps track of which planes are updated or disabled
during a modeset. This allows atomic updates of the the display engine
at ->atomic_flush() time.
Signed-off-by: Thierry Reding <treding@...dia.com>
---
drivers/gpu/drm/tegra/dc.c | 72 ++++++++++++++++++++++++++++------------------
1 file changed, 44 insertions(+), 28 deletions(-)
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index 52ae563cb531..835de4398c8f 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -54,6 +54,8 @@ struct tegra_dc_state {
struct clk *clk;
unsigned long pclk;
unsigned int div;
+
+ u32 planes;
};
static inline struct tegra_dc_state *to_dc_state(struct drm_crtc_state *state)
@@ -64,20 +66,6 @@ static inline struct tegra_dc_state *to_dc_state(struct drm_crtc_state *state)
return NULL;
}
-static void tegra_dc_window_commit(struct tegra_dc *dc, unsigned int index)
-{
- u32 value = WIN_A_ACT_REQ << index;
-
- tegra_dc_writel(dc, value << 8, DC_CMD_STATE_CONTROL);
- tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
-}
-
-static void tegra_dc_cursor_commit(struct tegra_dc *dc)
-{
- tegra_dc_writel(dc, CURSOR_ACT_REQ << 8, DC_CMD_STATE_CONTROL);
- tegra_dc_writel(dc, CURSOR_ACT_REQ, DC_CMD_STATE_CONTROL);
-}
-
/*
* Reads the active copy of a register. This takes the dc->lock spinlock to
* prevent races with the VBLANK processing which also needs access to the
@@ -395,8 +383,6 @@ static void tegra_dc_setup_window(struct tegra_dc *dc, unsigned int index,
break;
}
- tegra_dc_window_commit(dc, index);
-
spin_unlock_irqrestore(&dc->lock, flags);
}
@@ -439,9 +425,28 @@ static void tegra_plane_cleanup_fb(struct drm_plane *plane,
{
}
+static int tegra_plane_state_add(struct tegra_plane *plane,
+ struct drm_plane_state *state)
+{
+ struct drm_crtc_state *crtc_state;
+ struct tegra_dc_state *tegra;
+
+ /* Propagate errors from allocation or locking failures. */
+ crtc_state = drm_atomic_plane_get_crtc_state(state);
+ if (IS_ERR(crtc_state))
+ return PTR_ERR(crtc_state);
+
+ tegra = to_dc_state(crtc_state);
+
+ tegra->planes |= WIN_A_ACT_REQ << plane->index;
+
+ return 0;
+}
+
static int tegra_plane_atomic_check(struct drm_plane *plane,
struct drm_plane_state *state)
{
+ struct tegra_plane *tegra = to_tegra_plane(plane);
struct tegra_dc *dc = to_tegra_dc(state->crtc);
struct tegra_bo_tiling tiling;
int err;
@@ -472,6 +477,10 @@ static int tegra_plane_atomic_check(struct drm_plane *plane,
}
}
+ err = tegra_plane_state_add(tegra, state);
+ if (err < 0)
+ return err;
+
return 0;
}
@@ -538,8 +547,6 @@ static void tegra_plane_atomic_disable(struct drm_plane *plane,
value &= ~WIN_ENABLE;
tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
- tegra_dc_window_commit(dc, p->index);
-
spin_unlock_irqrestore(&dc->lock, flags);
}
@@ -599,6 +606,9 @@ static const u32 tegra_cursor_plane_formats[] = {
static int tegra_cursor_atomic_check(struct drm_plane *plane,
struct drm_plane_state *state)
{
+ struct tegra_plane *tegra = to_tegra_plane(plane);
+ int err;
+
/* no need for further checks if the plane is being disabled */
if (!state->crtc)
return 0;
@@ -616,6 +626,10 @@ static int tegra_cursor_atomic_check(struct drm_plane *plane,
state->crtc_w != 128 && state->crtc_w != 256)
return -EINVAL;
+ err = tegra_plane_state_add(tegra, state);
+ if (err < 0)
+ return err;
+
return 0;
}
@@ -680,9 +694,6 @@ static void tegra_cursor_atomic_update(struct drm_plane *plane,
value = (state->crtc_y & 0x3fff) << 16 | (state->crtc_x & 0x3fff);
tegra_dc_writel(dc, value, DC_DISP_CURSOR_POSITION);
- /* apply changes */
- tegra_dc_cursor_commit(dc);
- tegra_dc_commit(dc);
}
static void tegra_cursor_atomic_disable(struct drm_plane *plane,
@@ -700,9 +711,6 @@ static void tegra_cursor_atomic_disable(struct drm_plane *plane,
value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
value &= ~CURSOR_ENABLE;
tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
-
- tegra_dc_cursor_commit(dc);
- tegra_dc_commit(dc);
}
static const struct drm_plane_funcs tegra_cursor_plane_funcs = {
@@ -734,6 +742,13 @@ static struct drm_plane *tegra_dc_cursor_plane_create(struct drm_device *drm,
if (!plane)
return ERR_PTR(-ENOMEM);
+ /*
+ * We'll treat the cursor as an overlay plane with index 6 here so
+ * that the update and activation request bits in DC_CMD_STATE_CONTROL
+ * match up.
+ */
+ plane->index = 6;
+
num_formats = ARRAY_SIZE(tegra_cursor_plane_formats);
formats = tegra_cursor_plane_formats;
@@ -1029,7 +1044,6 @@ static void tegra_crtc_disable(struct drm_crtc *crtc)
}
drm_crtc_vblank_off(crtc);
- tegra_dc_commit(dc);
}
static bool tegra_crtc_mode_fixup(struct drm_crtc *crtc,
@@ -1207,10 +1221,7 @@ static void tegra_crtc_prepare(struct drm_crtc *crtc)
static void tegra_crtc_commit(struct drm_crtc *crtc)
{
- struct tegra_dc *dc = to_tegra_dc(crtc);
-
drm_crtc_vblank_on(crtc);
- tegra_dc_commit(dc);
}
static int tegra_crtc_atomic_check(struct drm_crtc *crtc,
@@ -1235,6 +1246,11 @@ static void tegra_crtc_atomic_begin(struct drm_crtc *crtc)
static void tegra_crtc_atomic_flush(struct drm_crtc *crtc)
{
+ struct tegra_dc_state *state = to_dc_state(crtc->state);
+ struct tegra_dc *dc = to_tegra_dc(crtc);
+
+ tegra_dc_writel(dc, state->planes << 8, DC_CMD_STATE_CONTROL);
+ tegra_dc_writel(dc, state->planes, DC_CMD_STATE_CONTROL);
}
static const struct drm_crtc_helper_funcs tegra_crtc_helper_funcs = {
--
2.1.3
--
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