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Message-ID: <20260203082349.1082-4-ming.qian@oss.nxp.com>
Date: Tue, 3 Feb 2026 16:23:40 +0800
From: ming.qian@....nxp.com
To: mchehab@...nel.org,
hverkuil-cisco@...all.nl,
mirela.rabulea@....nxp.com
Cc: nicolas@...fresne.ca,
shawnguo@...nel.org,
s.hauer@...gutronix.de,
kernel@...gutronix.de,
festevam@...il.com,
xiahong.bao@....com,
eagle.zhou@....com,
linux-imx@....com,
Frank.li@....com,
imx@...ts.linux.dev,
linux-media@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v4 3/4] media: imx-jpeg: Add encoder ops layer for hardware abstraction
From: Ming Qian <ming.qian@....nxp.com>
Introduce mxc_jpeg_enc_ops function pointer structure to abstract
encoder configuration differences between hardware versions.
Extract the existing two-phase manual configuration into dedicated
functions (enter_config_mode/exit_config_mode) for v0 hardware.
Add setup_desc callback placeholder for future v1 hardware support
which will use descriptor-based configuration.
Store the extended sequential mode flag in the context to avoid
recalculating it during configuration phases.
No functional change.
Reviewed-by: Frank Li <Frank.Li@....com>
Signed-off-by: Ming Qian <ming.qian@....nxp.com>
---
.../media/platform/nxp/imx-jpeg/mxc-jpeg.c | 56 ++++++++++++++++---
.../media/platform/nxp/imx-jpeg/mxc-jpeg.h | 11 ++++
2 files changed, 58 insertions(+), 9 deletions(-)
diff --git a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
index 877e6c4f7406..c2e2c028b410 100644
--- a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
+++ b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
@@ -64,6 +64,12 @@
#include "mxc-jpeg-hw.h"
#include "mxc-jpeg.h"
+#define call_void_jpeg_enc_ops(jpeg, op, args...) \
+ do { \
+ if ((jpeg)->enc_cfg_ops && (jpeg)->enc_cfg_ops->op) \
+ (jpeg)->enc_cfg_ops->op(args); \
+ } while (0)
+
static const struct mxc_jpeg_fmt mxc_formats[] = {
{
.name = "JPEG",
@@ -1030,11 +1036,7 @@ static irqreturn_t mxc_jpeg_dec_irq(int irq, void *priv)
if (jpeg->mode == MXC_JPEG_ENCODE &&
ctx->enc_state == MXC_JPEG_ENC_CONF) {
- q_data = mxc_jpeg_get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
- ctx->enc_state = MXC_JPEG_ENCODING;
- dev_dbg(dev, "Encoder config finished. Start encoding...\n");
- mxc_jpeg_enc_set_quality(dev, reg, ctx->jpeg_quality);
- mxc_jpeg_enc_mode_go(dev, reg, mxc_jpeg_is_extended_sequential(q_data->fmt));
+ call_void_jpeg_enc_ops(jpeg, exit_config_mode, ctx);
goto job_unlock;
}
if (jpeg->mode == MXC_JPEG_DECODE && jpeg_src_buf->dht_needed &&
@@ -1272,6 +1274,7 @@ static void mxc_jpeg_config_dec_desc(struct vb2_buffer *out_buf,
jpeg_src_buf = vb2_to_mxc_buf(src_buf);
+ ctx->extseq = mxc_jpeg_is_extended_sequential(jpeg_src_buf->fmt);
/* setup the decoding descriptor */
desc->next_descpt_ptr = 0; /* end of chain */
q_data_cap = mxc_jpeg_get_q_data(ctx, cap_type);
@@ -1335,8 +1338,12 @@ static void mxc_jpeg_config_enc_desc(struct vb2_buffer *out_buf,
struct mxc_jpeg_q_data *q_data;
enum mxc_jpeg_image_format img_fmt;
int w, h;
+ bool extseq;
q_data = mxc_jpeg_get_q_data(ctx, src_buf->vb2_queue->type);
+ extseq = mxc_jpeg_is_extended_sequential(q_data->fmt);
+
+ ctx->extseq = extseq;
memset(desc, 0, sizeof(struct mxc_jpeg_desc));
memset(cfg_desc, 0, sizeof(struct mxc_jpeg_desc));
@@ -1369,11 +1376,14 @@ static void mxc_jpeg_config_enc_desc(struct vb2_buffer *out_buf,
desc->stm_ctrl = STM_CTRL_CONFIG_MOD(0) |
STM_CTRL_IMAGE_FORMAT(img_fmt);
desc->stm_ctrl |= STM_CTRL_BITBUF_PTR_CLR(1);
- if (mxc_jpeg_is_extended_sequential(q_data->fmt))
+ if (extseq)
desc->stm_ctrl |= STM_CTRL_PIXEL_PRECISION;
else
desc->stm_ctrl &= ~STM_CTRL_PIXEL_PRECISION;
mxc_jpeg_addrs(desc, src_buf, dst_buf, 0);
+
+ call_void_jpeg_enc_ops(jpeg, setup_desc, ctx);
+
dev_dbg(jpeg->dev, "cfg_desc:\n");
print_descriptor_info(jpeg->dev, cfg_desc);
dev_dbg(jpeg->dev, "enc desc:\n");
@@ -1385,6 +1395,33 @@ static void mxc_jpeg_config_enc_desc(struct vb2_buffer *out_buf,
mxc_jpeg_set_desc(cfg_desc_handle, reg, slot);
}
+static void mxc_jpeg_enc_start_config_manually(struct mxc_jpeg_ctx *ctx)
+{
+ struct mxc_jpeg_dev *jpeg = ctx->mxc_jpeg;
+ void __iomem *reg = jpeg->base_reg;
+ struct device *dev = jpeg->dev;
+
+ ctx->enc_state = MXC_JPEG_ENC_CONF;
+ mxc_jpeg_enc_mode_conf(dev, reg, ctx->extseq);
+}
+
+static void mxc_jpeg_enc_finish_config_manually(struct mxc_jpeg_ctx *ctx)
+{
+ struct mxc_jpeg_dev *jpeg = ctx->mxc_jpeg;
+ void __iomem *reg = jpeg->base_reg;
+ struct device *dev = jpeg->dev;
+
+ ctx->enc_state = MXC_JPEG_ENCODING;
+ dev_dbg(dev, "Encoder config finished. Start encoding...\n");
+ mxc_jpeg_enc_set_quality(dev, reg, ctx->jpeg_quality);
+ mxc_jpeg_enc_mode_go(dev, reg, ctx->extseq);
+}
+
+static const struct mxc_jpeg_enc_ops mxc_jpeg_enc_cfg_ops_v0 = {
+ .enter_config_mode = mxc_jpeg_enc_start_config_manually,
+ .exit_config_mode = mxc_jpeg_enc_finish_config_manually
+};
+
static const struct mxc_jpeg_fmt *mxc_jpeg_get_sibling_format(const struct mxc_jpeg_fmt *fmt)
{
int i;
@@ -1590,12 +1627,10 @@ static void mxc_jpeg_device_run(void *priv)
if (jpeg->mode == MXC_JPEG_ENCODE) {
dev_dbg(dev, "Encoding on slot %d\n", ctx->slot);
- ctx->enc_state = MXC_JPEG_ENC_CONF;
mxc_jpeg_config_enc_desc(&dst_buf->vb2_buf, ctx,
&src_buf->vb2_buf, &dst_buf->vb2_buf);
/* start config phase */
- mxc_jpeg_enc_mode_conf(dev, reg,
- mxc_jpeg_is_extended_sequential(q_data_out->fmt));
+ call_void_jpeg_enc_ops(jpeg, enter_config_mode, ctx);
} else {
dev_dbg(dev, "Decoding on slot %d\n", ctx->slot);
print_mxc_buf(jpeg, &src_buf->vb2_buf, 0);
@@ -2977,6 +3012,9 @@ static int mxc_jpeg_probe(struct platform_device *pdev)
goto err_pm;
}
+ if (mode == MXC_JPEG_ENCODE)
+ jpeg->enc_cfg_ops = &mxc_jpeg_enc_cfg_ops_v0;
+
return 0;
err_pm:
diff --git a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.h b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.h
index 9c5b4f053ded..cdfefb68346a 100644
--- a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.h
+++ b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.h
@@ -105,6 +105,7 @@ struct mxc_jpeg_ctx {
unsigned int source_change;
bool need_initial_source_change_evt;
bool header_parsed;
+ bool extseq;
struct v4l2_ctrl_handler ctrl_handler;
u8 jpeg_quality;
struct delayed_work task_timer;
@@ -125,6 +126,15 @@ struct mxc_jpeg_slot_data {
dma_addr_t cfg_dec_daddr;
};
+struct mxc_jpeg_enc_ops {
+ /* Manual configuration (v0 hardware) - two-phase process */
+ void (*enter_config_mode)(struct mxc_jpeg_ctx *ctx);
+ void (*exit_config_mode)(struct mxc_jpeg_ctx *ctx);
+
+ /* Descriptor-based configuration (v1 hardware) - single-phase */
+ void (*setup_desc)(struct mxc_jpeg_ctx *ctx);
+};
+
struct mxc_jpeg_dev {
spinlock_t hw_lock; /* hardware access lock */
unsigned int mode;
@@ -142,6 +152,7 @@ struct mxc_jpeg_dev {
struct device **pd_dev;
struct device_link **pd_link;
struct gen_pool *sram_pool;
+ const struct mxc_jpeg_enc_ops *enc_cfg_ops;
};
/**
--
2.52.0
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