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Subject[Patch v4 3/8] drm/omap: introduce omap_hw_overlay
Date
Split out the hardware overlay specifics from omap_plane.
To start, the hw overlays are statically assigned to planes.

The goal is to eventually assign hw overlays dynamically to planes
during plane->atomic_check() based on requested caps (scaling, YUV,
etc). And then perform hw overlay re-assignment if required.

Signed-off-by: Benoit Parrot <bparrot@ti.com>
---
drivers/gpu/drm/omapdrm/Makefile | 1 +
drivers/gpu/drm/omapdrm/omap_drv.c | 10 +++-
drivers/gpu/drm/omapdrm/omap_drv.h | 4 ++
drivers/gpu/drm/omapdrm/omap_overlay.c | 87 ++++++++++++++++++++++++++++++++++
drivers/gpu/drm/omapdrm/omap_overlay.h | 31 ++++++++++++
drivers/gpu/drm/omapdrm/omap_plane.c | 47 +++++++++---------
6 files changed, 156 insertions(+), 24 deletions(-)
create mode 100644 drivers/gpu/drm/omapdrm/omap_overlay.c
create mode 100644 drivers/gpu/drm/omapdrm/omap_overlay.h

diff --git a/drivers/gpu/drm/omapdrm/Makefile b/drivers/gpu/drm/omapdrm/Makefile
index f115253115c5..800dfd035360 100644
--- a/drivers/gpu/drm/omapdrm/Makefile
+++ b/drivers/gpu/drm/omapdrm/Makefile
@@ -12,6 +12,7 @@ omapdrm-y := omap_drv.o \
omap_debugfs.o \
omap_crtc.o \
omap_plane.o \
+ omap_overlay.o \
omap_encoder.o \
omap_connector.o \
omap_fb.o \
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 5e67d58cbc28..2921cc90f2d8 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -569,10 +569,14 @@ static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)

omap_gem_init(ddev);

+ ret = omap_hwoverlays_init(priv);
+ if (ret)
+ goto err_gem_deinit;
+
ret = omap_modeset_init(ddev);
if (ret) {
dev_err(priv->dev, "omap_modeset_init failed: ret=%d\n", ret);
- goto err_gem_deinit;
+ goto err_free_overlays;
}

/* Initialize vblank handling, start with all CRTCs disabled. */
@@ -608,6 +612,8 @@ static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
err_cleanup_modeset:
drm_mode_config_cleanup(ddev);
omap_drm_irq_uninstall(ddev);
+err_free_overlays:
+ omap_hwoverlays_destroy(priv);
err_gem_deinit:
omap_gem_deinit(ddev);
destroy_workqueue(priv->wq);
@@ -638,6 +644,8 @@ static void omapdrm_cleanup(struct omap_drm_private *priv)
omap_drm_irq_uninstall(ddev);
omap_gem_deinit(ddev);

+ omap_hwoverlays_destroy(priv);
+
destroy_workqueue(priv->wq);

omap_disconnect_pipelines(ddev);
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.h b/drivers/gpu/drm/omapdrm/omap_drv.h
index bd7f2c227a25..929f04e7cc3b 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.h
+++ b/drivers/gpu/drm/omapdrm/omap_drv.h
@@ -37,6 +37,7 @@
#include "omap_gem.h"
#include "omap_irq.h"
#include "omap_plane.h"
+#include "omap_overlay.h"

#define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
#define VERB(fmt, ...) if (0) DRM_DEBUG(fmt, ##__VA_ARGS__) /* verbose debug */
@@ -69,6 +70,9 @@ struct omap_drm_private {
unsigned int num_planes;
struct drm_plane *planes[8];

+ unsigned int num_ovls;
+ struct omap_hw_overlay *overlays[8];
+
struct drm_fb_helper *fbdev;

struct workqueue_struct *wq;
diff --git a/drivers/gpu/drm/omapdrm/omap_overlay.c b/drivers/gpu/drm/omapdrm/omap_overlay.c
new file mode 100644
index 000000000000..7a09b0aa823a
--- /dev/null
+++ b/drivers/gpu/drm/omapdrm/omap_overlay.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
+ * Author: Benoit Parrot, <bparrot@ti.com>
+ */
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_plane_helper.h>
+
+#include "omap_dmm_tiler.h"
+#include "omap_drv.h"
+
+/*
+ * overlay funcs
+ */
+static const char * const overlay_id_to_name[] = {
+ [OMAP_DSS_GFX] = "gfx",
+ [OMAP_DSS_VIDEO1] = "vid1",
+ [OMAP_DSS_VIDEO2] = "vid2",
+ [OMAP_DSS_VIDEO3] = "vid3",
+};
+
+static void omap_overlay_destroy(struct omap_hw_overlay *overlay)
+{
+ kfree(overlay);
+}
+
+static struct omap_hw_overlay *omap_overlay_init(enum omap_plane_id overlay_id,
+ enum omap_overlay_caps caps)
+{
+ struct omap_hw_overlay *overlay;
+
+ overlay = kzalloc(sizeof(*overlay), GFP_KERNEL);
+ if (!overlay)
+ return ERR_PTR(-ENOMEM);
+
+ overlay->name = overlay_id_to_name[overlay_id];
+ overlay->overlay_id = overlay_id;
+ overlay->caps = caps;
+ /*
+ * When this is called priv->num_crtcs is not known yet.
+ * Use a safe mask value to start with, it will get updated to the
+ * proper value after the first use.
+ */
+ overlay->possible_crtcs = 0xff;
+
+ return overlay;
+}
+
+int omap_hwoverlays_init(struct omap_drm_private *priv)
+{
+ static const enum omap_plane_id hw_plane_ids[] = {
+ OMAP_DSS_GFX, OMAP_DSS_VIDEO1,
+ OMAP_DSS_VIDEO2, OMAP_DSS_VIDEO3,
+ };
+ u32 num_overlays = priv->dispc_ops->get_num_ovls(priv->dispc);
+ enum omap_overlay_caps caps;
+ int i, ret;
+
+ for (i = 0; i < num_overlays; i++) {
+ struct omap_hw_overlay *overlay;
+
+ caps = priv->dispc_ops->ovl_get_caps(priv->dispc, hw_plane_ids[i]);
+ overlay = omap_overlay_init(hw_plane_ids[i], caps);
+ if (IS_ERR(overlay)) {
+ ret = PTR_ERR(overlay);
+ dev_err(priv->dev, "failed to construct overlay for %s (%d)\n",
+ overlay_id_to_name[i], ret);
+ return ret;
+ }
+ overlay->idx = priv->num_ovls;
+ priv->overlays[priv->num_ovls++] = overlay;
+ }
+
+ return 0;
+}
+
+void omap_hwoverlays_destroy(struct omap_drm_private *priv)
+{
+ int i;
+
+ for (i = 0; i < priv->num_ovls; i++) {
+ omap_overlay_destroy(priv->overlays[i]);
+ priv->overlays[i] = NULL;
+ }
+}
diff --git a/drivers/gpu/drm/omapdrm/omap_overlay.h b/drivers/gpu/drm/omapdrm/omap_overlay.h
new file mode 100644
index 000000000000..892fecb67adb
--- /dev/null
+++ b/drivers/gpu/drm/omapdrm/omap_overlay.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
+ * Author: Benoit Parrot, <bparrot@ti.com>
+ */
+
+#ifndef __OMAPDRM_OVERLAY_H__
+#define __OMAPDRM_OVERLAY_H__
+
+#include <linux/types.h>
+
+enum drm_plane_type;
+
+struct drm_device;
+struct drm_mode_object;
+struct drm_plane;
+
+/* Used to associate a HW overlay/plane to a plane */
+struct omap_hw_overlay {
+ int idx;
+
+ const char *name;
+ enum omap_plane_id overlay_id;
+
+ enum omap_overlay_caps caps;
+ u32 possible_crtcs;
+};
+
+int omap_hwoverlays_init(struct omap_drm_private *priv);
+void omap_hwoverlays_destroy(struct omap_drm_private *priv);
+#endif /* __OMAPDRM_OVERLAY_H__ */
diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c b/drivers/gpu/drm/omapdrm/omap_plane.c
index e1e338e76841..26c2c78d020f 100644
--- a/drivers/gpu/drm/omapdrm/omap_plane.c
+++ b/drivers/gpu/drm/omapdrm/omap_plane.c
@@ -32,6 +32,8 @@ struct omap_plane {
struct drm_plane base;
enum omap_plane_id id;
const char *name;
+
+ struct omap_hw_overlay *overlay;
};

static int omap_plane_prepare_fb(struct drm_plane *plane,
@@ -57,8 +59,11 @@ static void omap_plane_atomic_update(struct drm_plane *plane,
struct omap_plane *omap_plane = to_omap_plane(plane);
struct drm_plane_state *state = plane->state;
struct omap_overlay_info info;
+ enum omap_plane_id ovl_id = omap_plane->overlay->overlay_id;
int ret;

+ DBG("[PLANE:%d:%s] overlay_id: %d", plane->base.id, plane->name,
+ ovl_id);
DBG("%s, crtc=%p fb=%p", omap_plane->name, state->crtc, state->fb);

memset(&info, 0, sizeof(info));
@@ -77,17 +82,17 @@ static void omap_plane_atomic_update(struct drm_plane *plane,
&info.paddr, &info.p_uv_addr);

/* and finally, update omapdss: */
- ret = priv->dispc_ops->ovl_setup(priv->dispc, omap_plane->id, &info,
+ ret = priv->dispc_ops->ovl_setup(priv->dispc, ovl_id, &info,
omap_crtc_timings(state->crtc), false,
omap_crtc_channel(state->crtc));
if (ret) {
dev_err(plane->dev->dev, "Failed to setup plane %s\n",
omap_plane->name);
- priv->dispc_ops->ovl_enable(priv->dispc, omap_plane->id, false);
+ priv->dispc_ops->ovl_enable(priv->dispc, ovl_id, false);
return;
}

- priv->dispc_ops->ovl_enable(priv->dispc, omap_plane->id, true);
+ priv->dispc_ops->ovl_enable(priv->dispc, ovl_id, true);
}

static void omap_plane_atomic_disable(struct drm_plane *plane,
@@ -95,12 +100,13 @@ static void omap_plane_atomic_disable(struct drm_plane *plane,
{
struct omap_drm_private *priv = plane->dev->dev_private;
struct omap_plane *omap_plane = to_omap_plane(plane);
+ enum omap_plane_id ovl_id = omap_plane->overlay->overlay_id;

plane->state->rotation = DRM_MODE_ROTATE_0;
plane->state->zpos = plane->type == DRM_PLANE_TYPE_PRIMARY
- ? 0 : omap_plane->id;
+ ? 0 : ovl_id;

- priv->dispc_ops->ovl_enable(priv->dispc, omap_plane->id, false);
+ priv->dispc_ops->ovl_enable(priv->dispc, ovl_id, false);
}

static int omap_plane_atomic_check(struct drm_plane *plane,
@@ -209,7 +215,7 @@ static void omap_plane_reset(struct drm_plane *plane)
* plane.
*/
plane->state->zpos = plane->type == DRM_PLANE_TYPE_PRIMARY
- ? 0 : omap_plane->id;
+ ? 0 : omap_plane->overlay->overlay_id;
}

static int omap_plane_atomic_set_property(struct drm_plane *plane,
@@ -260,13 +266,6 @@ static const char *plane_id_to_name[] = {
[OMAP_DSS_VIDEO3] = "vid3",
};

-static const enum omap_plane_id plane_idx_to_id[] = {
- OMAP_DSS_GFX,
- OMAP_DSS_VIDEO1,
- OMAP_DSS_VIDEO2,
- OMAP_DSS_VIDEO3,
-};
-
/* initialize plane */
struct drm_plane *omap_plane_init(struct drm_device *dev,
int idx, enum drm_plane_type type,
@@ -276,27 +275,29 @@ struct drm_plane *omap_plane_init(struct drm_device *dev,
unsigned int num_planes = priv->dispc_ops->get_num_ovls(priv->dispc);
struct drm_plane *plane;
struct omap_plane *omap_plane;
- enum omap_plane_id id;
int ret;
u32 nformats;
const u32 *formats;

- if (WARN_ON(idx >= ARRAY_SIZE(plane_idx_to_id)))
+ if (WARN_ON(idx >= num_planes))
return ERR_PTR(-EINVAL);

- id = plane_idx_to_id[idx];
-
- DBG("%s: type=%d", plane_id_to_name[id], type);
-
omap_plane = kzalloc(sizeof(*omap_plane), GFP_KERNEL);
if (!omap_plane)
return ERR_PTR(-ENOMEM);

- formats = priv->dispc_ops->ovl_get_color_modes(priv->dispc, id);
+ omap_plane->id = idx;
+ omap_plane->name = plane_id_to_name[idx];
+ omap_plane->overlay = priv->overlays[idx];
+
+ DBG("%s: type=%d", omap_plane->name, type);
+ DBG(" omap_plane->id: %d", omap_plane->id);
+ DBG(" crtc_mask: 0x%04x", possible_crtcs);
+
+ formats = priv->dispc_ops->ovl_get_color_modes(priv->dispc,
+ omap_plane->overlay->overlay_id);
for (nformats = 0; formats[nformats]; ++nformats)
;
- omap_plane->id = id;
- omap_plane->name = plane_id_to_name[id];

plane = &omap_plane->base;

@@ -315,7 +316,7 @@ struct drm_plane *omap_plane_init(struct drm_device *dev,

error:
dev_err(dev->dev, "%s(): could not create plane: %s\n",
- __func__, plane_id_to_name[id]);
+ __func__, omap_plane->name);

kfree(omap_plane);
return NULL;
--
2.9.0
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