The cal_ctx_wr_dma_config() function has access to the context, there's
no need to give it format-related values retrieved from the context.
Access the values internally, and reword internal comments. The comment
regarding the CAL_WR_DMA_OFST register not being well understood is
dropped, as the datasheet explicitly documents it as "Offset between two
consecutive line starts".
Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Reviewed-by: Benoit Parrot <bparrot@xxxxxx>
---
drivers/media/platform/ti-vpe/cal-video.c | 3 +--
drivers/media/platform/ti-vpe/cal.c | 25 +++++++++--------------
drivers/media/platform/ti-vpe/cal.h | 3 +--
3 files changed, 12 insertions(+), 19 deletions(-)
diff --git a/drivers/media/platform/ti-vpe/cal-video.c b/drivers/media/platform/ti-vpe/cal-video.c
index 1ada27d42da1..083389635269 100644
--- a/drivers/media/platform/ti-vpe/cal-video.c
+++ b/drivers/media/platform/ti-vpe/cal-video.c
@@ -516,8 +516,7 @@ static int cal_start_streaming(struct vb2_queue *vq, unsigned int count)
cal_ctx_csi2_config(ctx);
cal_ctx_pix_proc_config(ctx);
- cal_ctx_wr_dma_config(ctx, ctx->v_fmt.fmt.pix.bytesperline,
- ctx->v_fmt.fmt.pix.height);
+ cal_ctx_wr_dma_config(ctx);
cal_camerarx_enable_irqs(ctx->phy);
diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti-vpe/cal.c
index 5d073d9cd8b5..4c938ca1f1a9 100644
--- a/drivers/media/platform/ti-vpe/cal.c
+++ b/drivers/media/platform/ti-vpe/cal.c
@@ -356,14 +356,15 @@ void cal_ctx_pix_proc_config(struct cal_ctx *ctx)
cal_read(ctx->cal, CAL_PIX_PROC(ctx->index)));
}
-void cal_ctx_wr_dma_config(struct cal_ctx *ctx, unsigned int width,
- unsigned int height)
+void cal_ctx_wr_dma_config(struct cal_ctx *ctx)
{
+ unsigned int stride = ctx->v_fmt.fmt.pix.bytesperline;
u32 val;
val = cal_read(ctx->cal, CAL_WR_DMA_CTRL(ctx->index));
cal_set_field(&val, ctx->cport, CAL_WR_DMA_CTRL_CPORT_MASK);
- cal_set_field(&val, height, CAL_WR_DMA_CTRL_YSIZE_MASK);
+ cal_set_field(&val, ctx->v_fmt.fmt.pix.height,
+ CAL_WR_DMA_CTRL_YSIZE_MASK);
cal_set_field(&val, CAL_WR_DMA_CTRL_DTAG_PIX_DAT,
CAL_WR_DMA_CTRL_DTAG_MASK);
cal_set_field(&val, CAL_WR_DMA_CTRL_MODE_CONST,
@@ -375,14 +376,8 @@ void cal_ctx_wr_dma_config(struct cal_ctx *ctx, unsigned int width,
ctx_dbg(3, ctx, "CAL_WR_DMA_CTRL(%d) = 0x%08x\n", ctx->index,
cal_read(ctx->cal, CAL_WR_DMA_CTRL(ctx->index)));
- /*
- * width/16 not sure but giving it a whirl.
- * zero does not work right
- */
- cal_write_field(ctx->cal,
- CAL_WR_DMA_OFST(ctx->index),
- (width / 16),
- CAL_WR_DMA_OFST_MASK);
+ cal_write_field(ctx->cal, CAL_WR_DMA_OFST(ctx->index),
+ stride / 16, CAL_WR_DMA_OFST_MASK);
ctx_dbg(3, ctx, "CAL_WR_DMA_OFST(%d) = 0x%08x\n", ctx->index,
cal_read(ctx->cal, CAL_WR_DMA_OFST(ctx->index)));
@@ -390,11 +385,11 @@ void cal_ctx_wr_dma_config(struct cal_ctx *ctx, unsigned int width,
/* 64 bit word means no skipping */
cal_set_field(&val, 0, CAL_WR_DMA_XSIZE_XSKIP_MASK);
/*
- * (width*8)/64 this should be size of an entire line
- * in 64bit word but 0 means all data until the end
- * is detected automagically
+ * The XSIZE field is expressed in 64-bit units and prevents overflows
+ * in case of synchronization issues by limiting the number of bytes
+ * written per line.
*/
- cal_set_field(&val, (width / 8), CAL_WR_DMA_XSIZE_MASK);
+ cal_set_field(&val, stride / 8, CAL_WR_DMA_XSIZE_MASK);
cal_write(ctx->cal, CAL_WR_DMA_XSIZE(ctx->index), val);
ctx_dbg(3, ctx, "CAL_WR_DMA_XSIZE(%d) = 0x%08x\n", ctx->index,
cal_read(ctx->cal, CAL_WR_DMA_XSIZE(ctx->index)));
diff --git a/drivers/media/platform/ti-vpe/cal.h b/drivers/media/platform/ti-vpe/cal.h
index 45f65ebf7aa9..d8e7f0c586f6 100644
--- a/drivers/media/platform/ti-vpe/cal.h
+++ b/drivers/media/platform/ti-vpe/cal.h
@@ -273,8 +273,7 @@ void cal_camerarx_destroy(struct cal_camerarx *phy);
void cal_ctx_csi2_config(struct cal_ctx *ctx);
void cal_ctx_pix_proc_config(struct cal_ctx *ctx);
-void cal_ctx_wr_dma_config(struct cal_ctx *ctx, unsigned int width,
- unsigned int height);
+void cal_ctx_wr_dma_config(struct cal_ctx *ctx);
void cal_ctx_wr_dma_addr(struct cal_ctx *ctx, unsigned int dmaaddr);
int cal_ctx_v4l2_register(struct cal_ctx *ctx);
--
Regards,
Laurent Pinchart
