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Subject: media: mediatek: vcodec: avoid -Wcast-function-type-strict warning
Author: Arnd Bergmann <a...@arndb.de>
Date: Sat Feb 24 13:10:22 2024 +0100
The ipi handler here tries hard to maintain const-ness of its argument,
but by doing that causes a warning about function type casts:
drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c:38:32: error:
cast from 'mtk_vcodec_ipi_handler' (aka 'void (*)(void *, unsigned int, void
*)') to 'ipi_handler_t' (aka 'void (*)(const void *, unsigned int, void *)')
converts to incompatible function type [-Werror,-Wcast-function-type-strict]
38 | ipi_handler_t handler_const = (ipi_handler_t)handler;
| ^~~~~~~~~~~~~~~~~~~~~~
Remove the hack and just use a non-const argument.
Fixes: bf1d556ad4e0 ("media: mtk-vcodec: abstract firmware interface")
Signed-off-by: Arnd Bergmann <a...@arndb.de>
Reviewed-by: Ricardo Ribalda <riba...@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
drivers/media/platform/mediatek/mdp/mtk_mdp_vpu.c | 2 +-
.../media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c | 10 +---------
drivers/media/platform/mediatek/vpu/mtk_vpu.c | 2 +-
drivers/media/platform/mediatek/vpu/mtk_vpu.h | 2 +-
4 files changed, 4 insertions(+), 12 deletions(-)
---
diff --git a/drivers/media/platform/mediatek/mdp/mtk_mdp_vpu.c
b/drivers/media/platform/mediatek/mdp/mtk_mdp_vpu.c
index b065ccd06914..378a1cba0144 100644
--- a/drivers/media/platform/mediatek/mdp/mtk_mdp_vpu.c
+++ b/drivers/media/platform/mediatek/mdp/mtk_mdp_vpu.c
@@ -26,7 +26,7 @@ static void mtk_mdp_vpu_handle_init_ack(const struct
mdp_ipi_comm_ack *msg)
vpu->inst_addr = msg->vpu_inst_addr;
}
-static void mtk_mdp_vpu_ipi_handler(const void *data, unsigned int len,
+static void mtk_mdp_vpu_ipi_handler(void *data, unsigned int len,
void *priv)
{
const struct mdp_ipi_comm_ack *msg = data;
diff --git a/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c
b/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c
index 9f6e4b59455d..4c34344dc7dc 100644
--- a/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c
+++ b/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c
@@ -29,15 +29,7 @@ static int mtk_vcodec_vpu_set_ipi_register(struct
mtk_vcodec_fw *fw, int id,
mtk_vcodec_ipi_handler handler,
const char *name, void *priv)
{
- /*
- * The handler we receive takes a void * as its first argument. We
- * cannot change this because it needs to be passed down to the rproc
- * subsystem when SCP is used. VPU takes a const argument, which is
- * more constrained, so the conversion below is safe.
- */
- ipi_handler_t handler_const = (ipi_handler_t)handler;
-
- return vpu_ipi_register(fw->pdev, id, handler_const, name, priv);
+ return vpu_ipi_register(fw->pdev, id, handler, name, priv);
}
static int mtk_vcodec_vpu_ipi_send(struct mtk_vcodec_fw *fw, int id, void *buf,
diff --git a/drivers/media/platform/mediatek/vpu/mtk_vpu.c
b/drivers/media/platform/mediatek/vpu/mtk_vpu.c
index 7243604a82a5..724ae7c2ab3b 100644
--- a/drivers/media/platform/mediatek/vpu/mtk_vpu.c
+++ b/drivers/media/platform/mediatek/vpu/mtk_vpu.c
@@ -635,7 +635,7 @@ OUT_LOAD_FW:
}
EXPORT_SYMBOL_GPL(vpu_load_firmware);
-static void vpu_init_ipi_handler(const void *data, unsigned int len, void
*priv)
+static void vpu_init_ipi_handler(void *data, unsigned int len, void *priv)
{
struct mtk_vpu *vpu = priv;
const struct vpu_run *run = data;
diff --git a/drivers/media/platform/mediatek/vpu/mtk_vpu.h
b/drivers/media/platform/mediatek/vpu/mtk_vpu.h
index a56053ff135a..da05f3e74081 100644
--- a/drivers/media/platform/mediatek/vpu/mtk_vpu.h
+++ b/drivers/media/platform/mediatek/vpu/mtk_vpu.h
@@ -17,7 +17,7 @@
* VPU interfaces with other blocks by share memory and interrupt.
*/
-typedef void (*ipi_handler_t) (const void *data,
+typedef void (*ipi_handler_t) (void *data,
unsigned int len,
void *priv);
