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Message-Id: <20230623094931.117918-2-angelogioacchino.delregno@collabora.com>
Date: Fri, 23 Jun 2023 11:49:29 +0200
From: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
To: chunkuang.hu@...nel.org
Cc: p.zabel@...gutronix.de, airlied@...il.com, daniel@...ll.ch,
matthias.bgg@...il.com, angelogioacchino.delregno@...labora.com,
wenst@...omium.org, dri-devel@...ts.freedesktop.org,
linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, kernel@...labora.com
Subject: [PATCH 1/3] drm/mediatek: Dynamically allocate CMDQ and use helper functions
Instead of stack allocating the cmdq_client and cmdq_handle structures
switch them to pointers, allowing us to migrate this driver to use the
common functions provided by mtk-cmdq-helper.
In order to do this, it was also necessary to add a `priv` pointer to
struct cmdq_client, as that's used to pass (in this case) a mtk_crtc
handle to the ddp_cmdq_cb() mailbox RX callback function.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 107 +++++++-----------------
include/linux/soc/mediatek/mtk-cmdq.h | 1 +
2 files changed, 32 insertions(+), 76 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 0df62b076f49..b63289ab6787 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -50,8 +50,8 @@ struct mtk_drm_crtc {
bool pending_async_planes;
#if IS_REACHABLE(CONFIG_MTK_CMDQ)
- struct cmdq_client cmdq_client;
- struct cmdq_pkt cmdq_handle;
+ struct cmdq_client *cmdq_client;
+ struct cmdq_pkt *cmdq_handle;
u32 cmdq_event;
u32 cmdq_vblank_cnt;
wait_queue_head_t cb_blocking_queue;
@@ -108,47 +108,6 @@ static void mtk_drm_finish_page_flip(struct mtk_drm_crtc *mtk_crtc)
}
}
-#if IS_REACHABLE(CONFIG_MTK_CMDQ)
-static int mtk_drm_cmdq_pkt_create(struct cmdq_client *client, struct cmdq_pkt *pkt,
- size_t size)
-{
- struct device *dev;
- dma_addr_t dma_addr;
-
- pkt->va_base = kzalloc(size, GFP_KERNEL);
- if (!pkt->va_base) {
- kfree(pkt);
- return -ENOMEM;
- }
- pkt->buf_size = size;
- pkt->cl = (void *)client;
-
- dev = client->chan->mbox->dev;
- dma_addr = dma_map_single(dev, pkt->va_base, pkt->buf_size,
- DMA_TO_DEVICE);
- if (dma_mapping_error(dev, dma_addr)) {
- dev_err(dev, "dma map failed, size=%u\n", (u32)(u64)size);
- kfree(pkt->va_base);
- kfree(pkt);
- return -ENOMEM;
- }
-
- pkt->pa_base = dma_addr;
-
- return 0;
-}
-
-static void mtk_drm_cmdq_pkt_destroy(struct cmdq_pkt *pkt)
-{
- struct cmdq_client *client = (struct cmdq_client *)pkt->cl;
-
- dma_unmap_single(client->chan->mbox->dev, pkt->pa_base, pkt->buf_size,
- DMA_TO_DEVICE);
- kfree(pkt->va_base);
- kfree(pkt);
-}
-#endif
-
static void mtk_drm_crtc_destroy(struct drm_crtc *crtc)
{
struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
@@ -156,12 +115,9 @@ static void mtk_drm_crtc_destroy(struct drm_crtc *crtc)
mtk_mutex_put(mtk_crtc->mutex);
#if IS_REACHABLE(CONFIG_MTK_CMDQ)
- mtk_drm_cmdq_pkt_destroy(&mtk_crtc->cmdq_handle);
-
- if (mtk_crtc->cmdq_client.chan) {
- mbox_free_channel(mtk_crtc->cmdq_client.chan);
- mtk_crtc->cmdq_client.chan = NULL;
- }
+ cmdq_pkt_destroy(mtk_crtc->cmdq_handle);
+ cmdq_mbox_destroy(mtk_crtc->cmdq_client);
+ mtk_crtc->cmdq_client = NULL;
#endif
for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
@@ -288,7 +244,7 @@ static void ddp_cmdq_cb(struct mbox_client *cl, void *mssg)
{
struct cmdq_cb_data *data = mssg;
struct cmdq_client *cmdq_cl = container_of(cl, struct cmdq_client, client);
- struct mtk_drm_crtc *mtk_crtc = container_of(cmdq_cl, struct mtk_drm_crtc, cmdq_client);
+ struct mtk_drm_crtc *mtk_crtc = (struct mtk_drm_crtc *)cmdq_cl->priv;
struct mtk_crtc_state *state;
unsigned int i;
@@ -546,7 +502,7 @@ static void mtk_drm_crtc_update_config(struct mtk_drm_crtc *mtk_crtc,
bool needs_vblank)
{
#if IS_REACHABLE(CONFIG_MTK_CMDQ)
- struct cmdq_pkt *cmdq_handle = &mtk_crtc->cmdq_handle;
+ struct cmdq_pkt *cmdq_handle = mtk_crtc->cmdq_handle;
#endif
struct drm_crtc *crtc = &mtk_crtc->base;
struct mtk_drm_private *priv = crtc->dev->dev_private;
@@ -584,14 +540,14 @@ static void mtk_drm_crtc_update_config(struct mtk_drm_crtc *mtk_crtc,
mtk_mutex_release(mtk_crtc->mutex);
}
#if IS_REACHABLE(CONFIG_MTK_CMDQ)
- if (mtk_crtc->cmdq_client.chan) {
- mbox_flush(mtk_crtc->cmdq_client.chan, 2000);
+ if (mtk_crtc->cmdq_client) {
+ mbox_flush(mtk_crtc->cmdq_client->chan, 2000);
cmdq_handle->cmd_buf_size = 0;
cmdq_pkt_clear_event(cmdq_handle, mtk_crtc->cmdq_event);
cmdq_pkt_wfe(cmdq_handle, mtk_crtc->cmdq_event, false);
mtk_crtc_ddp_config(crtc, cmdq_handle);
cmdq_pkt_finalize(cmdq_handle);
- dma_sync_single_for_device(mtk_crtc->cmdq_client.chan->mbox->dev,
+ dma_sync_single_for_device(mtk_crtc->cmdq_client->chan->mbox->dev,
cmdq_handle->pa_base,
cmdq_handle->cmd_buf_size,
DMA_TO_DEVICE);
@@ -604,8 +560,8 @@ static void mtk_drm_crtc_update_config(struct mtk_drm_crtc *mtk_crtc,
*/
mtk_crtc->cmdq_vblank_cnt = 3;
- mbox_send_message(mtk_crtc->cmdq_client.chan, cmdq_handle);
- mbox_client_txdone(mtk_crtc->cmdq_client.chan, 0);
+ mbox_send_message(mtk_crtc->cmdq_client->chan, cmdq_handle);
+ mbox_client_txdone(mtk_crtc->cmdq_client->chan, 0);
}
#endif
mtk_crtc->config_updating = false;
@@ -619,7 +575,7 @@ static void mtk_crtc_ddp_irq(void *data)
struct mtk_drm_private *priv = crtc->dev->dev_private;
#if IS_REACHABLE(CONFIG_MTK_CMDQ)
- if (!priv->data->shadow_register && !mtk_crtc->cmdq_client.chan)
+ if (!priv->data->shadow_register && !mtk_crtc->cmdq_client)
mtk_crtc_ddp_config(crtc, NULL);
else if (mtk_crtc->cmdq_vblank_cnt > 0 && --mtk_crtc->cmdq_vblank_cnt == 0)
DRM_ERROR("mtk_crtc %d CMDQ execute command timeout!\n",
@@ -722,7 +678,7 @@ static void mtk_drm_crtc_atomic_disable(struct drm_crtc *crtc,
mtk_drm_crtc_update_config(mtk_crtc, false);
#if IS_REACHABLE(CONFIG_MTK_CMDQ)
/* Wait for planes to be disabled by cmdq */
- if (mtk_crtc->cmdq_client.chan)
+ if (mtk_crtc->cmdq_client)
wait_event_timeout(mtk_crtc->cb_blocking_queue,
mtk_crtc->cmdq_vblank_cnt == 0,
msecs_to_jiffies(500));
@@ -1002,19 +958,20 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
#if IS_REACHABLE(CONFIG_MTK_CMDQ)
i = priv->mbox_index++;
- mtk_crtc->cmdq_client.client.dev = mtk_crtc->mmsys_dev;
- mtk_crtc->cmdq_client.client.tx_block = false;
- mtk_crtc->cmdq_client.client.knows_txdone = true;
- mtk_crtc->cmdq_client.client.rx_callback = ddp_cmdq_cb;
- mtk_crtc->cmdq_client.chan =
- mbox_request_channel(&mtk_crtc->cmdq_client.client, i);
- if (IS_ERR(mtk_crtc->cmdq_client.chan)) {
- 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.chan = NULL;
+
+ mtk_crtc->cmdq_client = cmdq_mbox_create(mtk_crtc->mmsys_dev, i);
+ if (IS_ERR(mtk_crtc->cmdq_client)) {
+ ret = PTR_ERR(mtk_crtc->cmdq_client);
+ dev_dbg(dev, "Failed to create CMDQ client: %d\n", ret);
+ mtk_crtc->cmdq_client = NULL;
+ return 0;
}
- if (mtk_crtc->cmdq_client.chan) {
+ /* Setup the CMDQ handler callback */
+ mtk_crtc->cmdq_client->priv = mtk_crtc;
+ mtk_crtc->cmdq_client->client.rx_callback = ddp_cmdq_cb;
+
+ if (mtk_crtc->cmdq_client) {
ret = of_property_read_u32_index(priv->mutex_node,
"mediatek,gce-events",
i,
@@ -1022,17 +979,15 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
if (ret) {
dev_dbg(dev, "mtk_crtc %d failed to get mediatek,gce-events property\n",
drm_crtc_index(&mtk_crtc->base));
- mbox_free_channel(mtk_crtc->cmdq_client.chan);
- mtk_crtc->cmdq_client.chan = NULL;
+ cmdq_mbox_destroy(mtk_crtc->cmdq_client);
+ mtk_crtc->cmdq_client = NULL;
} else {
- ret = mtk_drm_cmdq_pkt_create(&mtk_crtc->cmdq_client,
- &mtk_crtc->cmdq_handle,
- PAGE_SIZE);
+ mtk_crtc->cmdq_handle = cmdq_pkt_create(mtk_crtc->cmdq_client, PAGE_SIZE);
if (ret) {
dev_dbg(dev, "mtk_crtc %d failed to create cmdq packet\n",
drm_crtc_index(&mtk_crtc->base));
- mbox_free_channel(mtk_crtc->cmdq_client.chan);
- mtk_crtc->cmdq_client.chan = NULL;
+ cmdq_mbox_destroy(mtk_crtc->cmdq_client);
+ mtk_crtc->cmdq_client = NULL;
}
}
diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index 649955d2cf5c..2a1dc8b12db3 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -25,6 +25,7 @@ struct cmdq_client_reg {
struct cmdq_client {
struct mbox_client client;
struct mbox_chan *chan;
+ void *priv;
};
#if IS_ENABLED(CONFIG_MTK_CMDQ)
--
2.40.1
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