[PATCH 26/29] drm/exynos: atomic phase 1: add atomic_begin()/atomic_flush()
Gustavo Padovan
gustavo at padovan.org
Thu Dec 18 05:58:52 PST 2014
From: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
Add CRTC callbacks .atomic_begin() .atomic_flush(). On exynos they
unprotect the windows before the commit and protects it after based on
a plane mask tha store which plane will be updated.
For that we create two new exynos_crtc callbacks: .win_protect() and
.win_unprotect(). The only driver that implement those now is FIMD.
Signed-off-by: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
---
drivers/gpu/drm/exynos/exynos_drm_crtc.c | 34 +++++++++++++++++++
drivers/gpu/drm/exynos/exynos_drm_drv.h | 4 +++
drivers/gpu/drm/exynos/exynos_drm_fimd.c | 56 ++++++++++++++++++++++---------
drivers/gpu/drm/exynos/exynos_drm_plane.c | 4 +++
4 files changed, 82 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index 74980c5..f231eb8 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -156,6 +156,38 @@ static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
}
}
+static void exynos_crtc_atomic_begin(struct drm_crtc *crtc)
+{
+ struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+ struct drm_plane *plane;
+ int index = 0;
+
+ list_for_each_entry(plane, &crtc->dev->mode_config.plane_list, head) {
+ if (exynos_crtc->ops->win_protect &&
+ exynos_crtc->plane_mask & (0x01 << index))
+ exynos_crtc->ops->win_protect(exynos_crtc, index);
+
+ index++;
+ }
+}
+
+static void exynos_crtc_atomic_flush(struct drm_crtc *crtc)
+{
+ struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
+ struct drm_plane *plane;
+ int index = 0;
+
+ list_for_each_entry(plane, &crtc->dev->mode_config.plane_list, head) {
+ if (exynos_crtc->ops->win_unprotect &&
+ exynos_crtc->plane_mask & (0x01 << index))
+ exynos_crtc->ops->win_unprotect(exynos_crtc, index);
+
+ index++;
+ }
+
+ exynos_crtc->plane_mask = 0;
+}
+
static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
.dpms = exynos_drm_crtc_dpms,
.prepare = exynos_drm_crtc_prepare,
@@ -164,6 +196,8 @@ static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
.mode_set = exynos_drm_crtc_mode_set,
.mode_set_base = exynos_drm_crtc_mode_set_base,
.disable = exynos_drm_crtc_disable,
+ .atomic_begin = exynos_crtc_atomic_begin,
+ .atomic_flush = exynos_crtc_atomic_flush,
};
static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index d490b49..1df769f 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -195,6 +195,8 @@ struct exynos_drm_crtc_ops {
void (*win_enable)(struct exynos_drm_crtc *crtc, int zpos);
void (*win_disable)(struct exynos_drm_crtc *crtc, int zpos);
void (*te_handler)(struct exynos_drm_crtc *crtc);
+ void (*win_protect)(struct exynos_drm_crtc *crtc, int zpos);
+ void (*win_unprotect)(struct exynos_drm_crtc *crtc, int zpos);
};
enum exynos_crtc_mode {
@@ -215,6 +217,7 @@ enum exynos_crtc_mode {
* we can refer to the crtc to current hardware interrupt occurred through
* this pipe value.
* @dpms: store the crtc dpms value
+ * @plane_mask: store planes to be updated on atomic modesetting
* @mode: store the crtc mode value
* @ops: pointer to callbacks for exynos drm specific functionality
* @ctx: A pointer to the crtc's implementation specific context
@@ -224,6 +227,7 @@ struct exynos_drm_crtc {
enum exynos_drm_output_type type;
unsigned int pipe;
unsigned int dpms;
+ unsigned int plane_mask;
enum exynos_crtc_mode mode;
wait_queue_head_t pending_flip_queue;
atomic_t pending_flip;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index 0e01b17..4a5ef31 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -644,6 +644,16 @@ static void fimd_shadow_protect_win(struct fimd_context *ctx,
{
u32 reg, bits, val;
+ /*
+ * SHADOWCON/PRTCON register is used for enabling timing.
+ *
+ * for example, once only width value of a register is set,
+ * if the dma is started then fimd hardware could malfunction so
+ * with protect window setting, the register fields with prefix '_F'
+ * wouldn't be updated at vsync also but updated once unprotect window
+ * is set.
+ */
+
if (ctx->driver_data->has_shadowcon) {
reg = SHADOWCON;
bits = SHADOWCON_WINx_PROTECT(win);
@@ -686,19 +696,6 @@ static void fimd_win_commit(struct exynos_drm_crtc *crtc, int zpos)
return;
}
- /*
- * SHADOWCON/PRTCON register is used for enabling timing.
- *
- * for example, once only width value of a register is set,
- * if the dma is started then fimd hardware could malfunction so
- * with protect window setting, the register fields with prefix '_F'
- * wouldn't be updated at vsync also but updated once unprotect window
- * is set.
- */
-
- /* protect windows */
- fimd_shadow_protect_win(ctx, win, true);
-
/* buffer start address */
val = (unsigned long)win_data->dma_addr;
writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
@@ -774,9 +771,6 @@ static void fimd_win_commit(struct exynos_drm_crtc *crtc, int zpos)
if (ctx->driver_data->has_shadowcon)
fimd_enable_shadow_channel_path(ctx, win, true);
- /* Enable DMA channel and unprotect windows */
- fimd_shadow_protect_win(ctx, win, false);
-
win_data->enabled = true;
if (ctx->i80_if)
@@ -1005,6 +999,34 @@ static void fimd_te_handler(struct exynos_drm_crtc *crtc)
drm_handle_vblank(ctx->drm_dev, ctx->pipe);
}
+static void fimd_win_protect(struct exynos_drm_crtc *crtc, int zpos)
+{
+ struct fimd_context *ctx = crtc->ctx;
+ int win = zpos;
+
+ if (win == DEFAULT_ZPOS)
+ win = ctx->default_win;
+
+ if (win < 0 || win >= WINDOWS_NR)
+ return;
+
+ fimd_shadow_protect_win(ctx, win, true);
+}
+
+static void fimd_win_unprotect(struct exynos_drm_crtc *crtc, int zpos)
+{
+ struct fimd_context *ctx = crtc->ctx;
+ int win = zpos;
+
+ if (win == DEFAULT_ZPOS)
+ win = ctx->default_win;
+
+ if (win < 0 || win >= WINDOWS_NR)
+ return;
+
+ fimd_shadow_protect_win(ctx, win, false);
+}
+
static struct exynos_drm_crtc_ops fimd_crtc_ops = {
.dpms = fimd_dpms,
.mode_fixup = fimd_mode_fixup,
@@ -1016,6 +1038,8 @@ static struct exynos_drm_crtc_ops fimd_crtc_ops = {
.win_commit = fimd_win_commit,
.win_disable = fimd_win_disable,
.te_handler = fimd_te_handler,
+ .win_protect = fimd_win_protect,
+ .win_unprotect = fimd_win_unprotect,
};
static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c b/drivers/gpu/drm/exynos/exynos_drm_plane.c
index dfca218..7bf922b 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_plane.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
@@ -65,6 +65,7 @@ static int exynos_plane_get_size(int start, unsigned length, unsigned last)
int exynos_check_plane(struct drm_plane *plane, struct drm_framebuffer *fb)
{
struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
+ struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(plane->crtc);
int nr;
int i;
@@ -83,6 +84,9 @@ int exynos_check_plane(struct drm_plane *plane, struct drm_framebuffer *fb)
i, (unsigned long)exynos_plane->dma_addr[i]);
}
+ if (exynos_crtc)
+ exynos_crtc->plane_mask += 1 << exynos_plane->zpos;
+
return 0;
}
--
1.9.3
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