[PATCH 7/7] drm/mediatek: apply CMDQ control flow
Bibby Hsieh
bibby.hsieh at mediatek.com
Tue Nov 26 06:29:32 UTC 2019
Unlike other SoCs, MT8183 does not have "shadow"
registers for performaing an atomic video mode
set or page flip at vblank/vsync.
The CMDQ (Commend Queue) in MT8183 is used to help
update all relevant display controller registers
with critical time limation.
Signed-off-by: YT Shen <yt.shen at mediatek.com>
Signed-off-by: CK Hu <ck.hu at mediatek.com>
Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>
Signed-off-by: Bibby Hsieh <bibby.hsieh at mediatek.com>
Signed-off-by: Yongqiang Niu <yongqiang.niu at mediatek.com>
---
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 165 ++++++++++++++++++--
drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 3 +-
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 31 ++++
drivers/gpu/drm/mediatek/mtk_drm_plane.c | 4 +
4 files changed, 187 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 3935fac624f6..4fb346cdda79 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -12,6 +12,8 @@
#include <drm/drm_plane_helper.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
+#include <linux/of_address.h>
+#include <linux/soc/mediatek/mtk-cmdq.h>
#include "mtk_drm_drv.h"
#include "mtk_drm_crtc.h"
@@ -20,6 +22,7 @@
#include "mtk_drm_gem.h"
#include "mtk_drm_plane.h"
+typedef void (*drm_cmdq_cb)(struct cmdq_cb_data data);
/**
* struct mtk_drm_crtc - MediaTek specific crtc structure.
* @base: crtc object.
@@ -42,6 +45,10 @@ struct mtk_drm_crtc {
unsigned int layer_nr;
bool pending_planes;
bool cursor_update;
+
+ struct cmdq_client *cmdq_client;
+ u32 cmdq_event;
+
void __iomem *config_regs;
const struct mtk_mmsys_reg_data *mmsys_reg_data;
struct mtk_disp_mutex *mutex;
@@ -57,6 +64,12 @@ struct mtk_crtc_state {
unsigned int pending_width;
unsigned int pending_height;
unsigned int pending_vrefresh;
+ struct cmdq_pkt *cmdq_handle;
+};
+
+struct mtk_cmdq_cb_data {
+ struct drm_crtc_state *state;
+ struct cmdq_pkt *cmdq_handle;
};
static inline struct mtk_drm_crtc *to_mtk_crtc(struct drm_crtc *c)
@@ -228,8 +241,71 @@ struct mtk_ddp_comp *mtk_drm_ddp_comp_for_plane(struct drm_crtc *crtc,
WARN(1, "Failed to find component for plane %d\n", plane->index);
return NULL;
+};
+
+#ifdef CONFIG_MTK_CMDQ
+static void ddp_cmdq_cursor_cb(struct cmdq_cb_data data)
+{
+ struct mtk_cmdq_cb_data *cb_data = data.data;
+
+ cmdq_pkt_destroy(cb_data->cmdq_handle);
+ kfree(cb_data);
}
+static void ddp_cmdq_cb(struct cmdq_cb_data data)
+{
+ struct mtk_cmdq_cb_data *cb_data = data.data;
+ struct drm_crtc_state *crtc_state = cb_data->state;
+ struct drm_atomic_state *atomic_state = crtc_state->state;
+ struct drm_crtc *crtc = crtc_state->crtc;
+ struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
+
+ if (mtk_crtc->pending_needs_vblank) {
+ /* cmdq_vblank_event must be read after cmdq_needs_event */
+ smp_rmb();
+
+ mtk_drm_crtc_finish_page_flip(mtk_crtc);
+ mtk_crtc->pending_needs_vblank = false;
+ }
+ mtk_atomic_state_put_queue(atomic_state);
+ cmdq_pkt_destroy(cb_data->cmdq_handle);
+ kfree(cb_data);
+}
+
+static void mtk_cmdq_acquire(struct drm_crtc *crtc)
+{
+ struct mtk_crtc_state *mtk_crtc_state =
+ to_mtk_crtc_state(crtc->state);
+ struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
+
+ mtk_crtc_state->cmdq_handle =
+ cmdq_pkt_create(mtk_crtc->cmdq_client,
+ PAGE_SIZE);
+ cmdq_pkt_clear_event(mtk_crtc_state->cmdq_handle,
+ mtk_crtc->cmdq_event);
+ cmdq_pkt_wfe(mtk_crtc_state->cmdq_handle, mtk_crtc->cmdq_event);
+}
+
+static void mtk_cmdq_release(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_crtc_state,
+ drm_cmdq_cb cb)
+{
+ struct mtk_crtc_state *mtk_crtc_state =
+ to_mtk_crtc_state(crtc->state);
+ struct mtk_cmdq_cb_data *cb_data;
+
+ cb_data = kmalloc(sizeof(*cb_data), GFP_KERNEL);
+ if (!cb_data) {
+ DRM_DEV_ERROR(crtc->dev->dev, "Failed to alloc cb_data\n");
+ return;
+ }
+
+ cb_data->cmdq_handle = mtk_crtc_state->cmdq_handle;
+ cb_data->state = old_crtc_state;
+ cmdq_pkt_flush_async(mtk_crtc_state->cmdq_handle,
+ cb, cb_data);
+}
+#endif
static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc)
{
struct drm_crtc *crtc = &mtk_crtc->base;
@@ -371,7 +447,7 @@ static void mtk_crtc_ddp_hw_fini(struct mtk_drm_crtc *mtk_crtc)
static void mtk_crtc_ddp_config(struct drm_crtc *crtc)
{
struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
- struct drm_atomic_state *atomic_state = mtk_crtc->old_crtc_state->state;
+ struct drm_atomic_state *atomic_state;
struct mtk_crtc_state *state = to_mtk_crtc_state(mtk_crtc->base.state);
struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
unsigned int i;
@@ -385,7 +461,8 @@ static void mtk_crtc_ddp_config(struct drm_crtc *crtc)
if (state->pending_config) {
mtk_ddp_comp_config(comp, state->pending_width,
state->pending_height,
- state->pending_vrefresh, 0, NULL);
+ state->pending_vrefresh, 0,
+ state->cmdq_handle);
state->pending_config = false;
}
@@ -405,12 +482,15 @@ static void mtk_crtc_ddp_config(struct drm_crtc *crtc)
if (comp)
mtk_ddp_comp_layer_config(comp, local_layer,
- plane_state, NULL);
+ plane_state,
+ state->cmdq_handle);
plane_state->pending.config = false;
}
mtk_crtc->pending_planes = false;
- if (!mtk_crtc->cursor_update)
+ if (!mtk_crtc->cursor_update) {
+ atomic_state = mtk_crtc->old_crtc_state->state;
mtk_atomic_state_put_queue(atomic_state);
+ }
mtk_crtc->cursor_update = false;
}
}
@@ -454,14 +534,40 @@ void mtk_drm_crtc_cursor_update(struct drm_crtc *crtc, struct drm_plane *plane,
}
}
mtk_crtc->pending_planes = true;
+ mtk_crtc->cursor_update = true;
if (priv->data->shadow_register) {
mtk_disp_mutex_acquire(mtk_crtc->mutex);
mtk_crtc_ddp_config(crtc);
mtk_disp_mutex_release(mtk_crtc->mutex);
}
+#ifdef CONFIG_MTK_CMDQ
+ if (mtk_crtc->cmdq_client) {
+ mtk_cmdq_acquire(crtc);
+ mtk_crtc_ddp_config(crtc);
+ mtk_cmdq_release(crtc, NULL, ddp_cmdq_cursor_cb);
+ }
+#endif
mutex_unlock(&priv->hw_lock);
}
+void mtk_drm_crtc_plane_update(struct drm_crtc *crtc, struct drm_plane *plane,
+ struct mtk_plane_state *state)
+{
+ struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
+ struct mtk_ddp_comp *comp;
+ struct drm_crtc_state *crtc_state = crtc->state;
+ struct mtk_crtc_state *mtk_crtc_state = to_mtk_crtc_state(crtc_state);
+ struct cmdq_pkt *cmdq_handle = mtk_crtc_state->cmdq_handle;
+ unsigned int local_layer;
+
+ if (mtk_crtc->cmdq_client) {
+ comp = mtk_drm_ddp_comp_for_plane(crtc, plane,
+ &local_layer);
+ mtk_ddp_comp_layer_config(comp, local_layer, state,
+ cmdq_handle);
+ }
+}
+
static void mtk_drm_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_crtc_state *old_state)
{
@@ -538,21 +644,39 @@ static void mtk_drm_crtc_atomic_begin(struct drm_crtc *crtc,
WARN_ON(mtk_crtc->event);
mtk_crtc->event = state->base.event;
state->base.event = NULL;
+ /* Make sure the above parameter is set before update */
+ smp_wmb();
+ mtk_crtc->pending_needs_vblank = true;
}
spin_unlock_irq(&crtc->dev->event_lock);
+#ifdef CONFIG_MTK_CMDQ
+ if (mtk_crtc->cmdq_client)
+ mtk_cmdq_acquire(crtc);
+#endif
}
static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
struct drm_atomic_state *old_atomic_state = old_crtc_state->state;
+ struct mtk_crtc_state *mtk_crtc_state = to_mtk_crtc_state(crtc->state);
struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
struct mtk_drm_private *priv = crtc->dev->dev_private;
unsigned int pending_planes = 0;
int i;
- if (mtk_crtc->event)
- mtk_crtc->pending_needs_vblank = true;
+ if (crtc->state->color_mgmt_changed)
+ for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
+ mtk_ddp_gamma_set(mtk_crtc->ddp_comp[i],
+ crtc->state,
+ mtk_crtc_state->cmdq_handle);
+#ifdef CONFIG_MTK_CMDQ
+ if (mtk_crtc->cmdq_client) {
+ drm_atomic_state_get(old_atomic_state);
+ mtk_cmdq_release(crtc, old_crtc_state, ddp_cmdq_cb);
+ return;
+ }
+#endif
for (i = 0; i < mtk_crtc->layer_nr; i++) {
struct drm_plane *plane = &mtk_crtc->planes[i];
struct mtk_plane_state *plane_state;
@@ -569,10 +693,6 @@ static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc,
drm_atomic_state_get(old_atomic_state);
mtk_crtc->old_crtc_state = old_crtc_state;
}
- if (crtc->state->color_mgmt_changed)
- for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
- mtk_ddp_gamma_set(mtk_crtc->ddp_comp[i],
- crtc->state, NULL);
if (priv->data->shadow_register) {
mtk_disp_mutex_acquire(mtk_crtc->mutex);
@@ -628,10 +748,13 @@ void mtk_crtc_ddp_irq(struct drm_crtc *crtc, struct mtk_ddp_comp *comp)
struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
struct mtk_drm_private *priv = crtc->dev->dev_private;
- if (!priv->data->shadow_register)
- mtk_crtc_ddp_config(crtc);
-
- mtk_drm_finish_page_flip(mtk_crtc);
+ if (mtk_crtc->cmdq_client) {
+ drm_crtc_handle_vblank(crtc);
+ } else {
+ if (!priv->data->shadow_register)
+ mtk_crtc_ddp_config(crtc);
+ mtk_drm_finish_page_flip(mtk_crtc);
+ }
}
static int mtk_drm_crtc_num_comp_planes(struct mtk_drm_crtc *mtk_crtc,
@@ -770,6 +893,18 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
drm_mode_crtc_set_gamma_size(&mtk_crtc->base, MTK_LUT_SIZE);
drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, MTK_LUT_SIZE);
priv->num_pipes++;
-
+#ifdef CONFIG_MTK_CMDQ
+ mtk_crtc->cmdq_client =
+ cmdq_mbox_create(dev, drm_crtc_index(&mtk_crtc->base),
+ 2000);
+ of_property_read_u32_index(dev->of_node, "mediatek,gce-events",
+ drm_crtc_index(&mtk_crtc->base),
+ &mtk_crtc->cmdq_event);
+ if (IS_ERR(mtk_crtc->cmdq_client)) {
+ dev_dbg(dev, "mtk_crtc %d failed to create mailbox client, writing register by CPU now\n",
+ drm_crtc_index(&mtk_crtc->base));
+ mtk_crtc->cmdq_client = NULL;
+ }
+#endif
return 0;
}
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
index 42a3f650f564..64e6cf969626 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
@@ -21,7 +21,8 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
unsigned int path_len);
int mtk_drm_crtc_plane_check(struct drm_crtc *crtc, struct drm_plane *plane,
struct mtk_plane_state *state);
-
+void mtk_drm_crtc_plane_update(struct drm_crtc *crtc, struct drm_plane *plane,
+ struct mtk_plane_state *state);
void mtk_drm_crtc_cursor_update(struct drm_crtc *crtc, struct drm_plane *plane,
struct drm_plane_state *plane_state);
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index 6d0f349ddf82..9cc12af2bc06 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -370,6 +370,9 @@ int mtk_ddp_comp_init(struct device *dev, struct device_node *node,
const struct mtk_ddp_comp_funcs *funcs)
{
struct platform_device *comp_pdev;
+ struct resource res;
+ struct cmdq_client_reg *cmdq_reg;
+ int ret = 0;
if (comp_id < 0 || comp_id >= DDP_COMPONENT_ID_MAX)
return -EINVAL;
@@ -404,6 +407,34 @@ int mtk_ddp_comp_init(struct device *dev, struct device_node *node,
}
comp->dev = &comp_pdev->dev;
+#ifdef CONFIG_MTK_CMDQ
+ if (of_address_to_resource(node, 0, &res) != 0) {
+ dev_err(dev, "Missing reg in %s node\n",
+ node->full_name);
+ return -EINVAL;
+ }
+ comp->regs_pa = res.start;
+
+ comp_pdev = of_find_device_by_node(node);
+ if (!comp_pdev) {
+ dev_warn(dev, "Waiting for component device %s\n",
+ node->full_name);
+ return -EPROBE_DEFER;
+ }
+
+ cmdq_reg = kzalloc(sizeof(*cmdq_reg), GFP_KERNEL);
+ if (!cmdq_reg)
+ return -EINVAL;
+
+ ret = cmdq_dev_get_client_reg(&comp_pdev->dev, cmdq_reg, 0);
+ if (ret != 0)
+ dev_dbg(&comp_pdev->dev,
+ "get mediatek,gce-client-reg fail!\n");
+ else
+ comp->subsys = cmdq_reg->subsys;
+
+ kfree(cmdq_reg);
+#endif
return 0;
}
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
index d7a8853d94a1..8e857ef512a2 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
@@ -189,6 +189,8 @@ static void mtk_plane_atomic_update(struct drm_plane *plane,
if (state->pending.cursor_update)
state->pending.cursor_dirty = true;
+ else
+ mtk_drm_crtc_plane_update(crtc, plane, state);
}
static void mtk_plane_atomic_disable(struct drm_plane *plane,
@@ -199,6 +201,8 @@ static void mtk_plane_atomic_disable(struct drm_plane *plane,
state->pending.enable = false;
wmb(); /* Make sure the above parameter is set before update */
state->pending.dirty = true;
+ /* Fetch CRTC from old plane state when disabling. */
+ mtk_drm_crtc_plane_update(old_state->crtc, plane, state);
}
static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
--
2.18.0
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