[PATCH 2/5] media: visl: Add a stable_output parameter

[Detlev Casanova]

This parameter is used to ensure that for a given input, the output
frames are always identical so that it can be compared against
a reference in automatic tests.

Signed-off-by: Detlev Casanova <detlev.casanova@xxxxxxxxxxxxx>
---
 drivers/media/test-drivers/visl/visl-core.c |   5 +
 drivers/media/test-drivers/visl/visl-dec.c  | 125 +++++++++++---------
 drivers/media/test-drivers/visl/visl.h      |   1 +
 3 files changed, 77 insertions(+), 54 deletions(-)

diff --git a/drivers/media/test-drivers/visl/visl-core.c b/drivers/media/test-drivers/visl/visl-core.c
index df6515530fbf..d28d50afec02 100644
--- a/drivers/media/test-drivers/visl/visl-core.c
+++ b/drivers/media/test-drivers/visl/visl-core.c
@@ -88,6 +88,11 @@ module_param(bitstream_trace_nframes, uint, 0);
 MODULE_PARM_DESC(bitstream_trace_nframes,
 		 " the number of frames to dump the bitstream through debugfs");
 
+bool stable_output;
+module_param(stable_output, bool, 0644);
+MODULE_PARM_DESC(stable_output,
+		 " only write stable data for a given input on the output frames");
+
 static const struct visl_ctrl_desc visl_fwht_ctrl_descs[] = {
 	{
 		.cfg.id = V4L2_CID_STATELESS_FWHT_PARAMS,
diff --git a/drivers/media/test-drivers/visl/visl-dec.c b/drivers/media/test-drivers/visl/visl-dec.c
index 318d675e5668..61cfca49ead9 100644
--- a/drivers/media/test-drivers/visl/visl-dec.c
+++ b/drivers/media/test-drivers/visl/visl-dec.c
@@ -197,19 +197,30 @@ static void visl_tpg_fill_sequence(struct visl_ctx *ctx,
 {
 	u32 stream_ms;
 
-	stream_ms = jiffies_to_msecs(get_jiffies_64() - ctx->capture_streamon_jiffies);
-
-	scnprintf(buf, bufsz,
-		  "stream time: %02d:%02d:%02d:%03d sequence:%u timestamp:%lld field:%s",
-		  (stream_ms / (60 * 60 * 1000)) % 24,
-		  (stream_ms / (60 * 1000)) % 60,
-		  (stream_ms / 1000) % 60,
-		  stream_ms % 1000,
-		  run->dst->sequence,
-		  run->dst->vb2_buf.timestamp,
-		  (run->dst->field == V4L2_FIELD_ALTERNATE) ?
-		  (run->dst->field == V4L2_FIELD_TOP ?
-		  " top" : " bottom") : "none");
+	if (!stable_output) {
+		stream_ms = jiffies_to_msecs(get_jiffies_64() - ctx->capture_streamon_jiffies);
+
+		scnprintf(buf, bufsz,
+			  "stream time: %02d:%02d:%02d:%03d sequence:%u timestamp:%lld field:%s",
+			  (stream_ms / (60 * 60 * 1000)) % 24,
+			  (stream_ms / (60 * 1000)) % 60,
+			  (stream_ms / 1000) % 60,
+			  stream_ms % 1000,
+			  run->dst->sequence,
+			  run->dst->vb2_buf.timestamp,
+			  (run->dst->field == V4L2_FIELD_ALTERNATE) ?
+			  (run->dst->field == V4L2_FIELD_TOP ?
+			  " top" : " bottom") : "none");
+	} else {
+		scnprintf(buf, bufsz,
+			  "sequence:%u timestamp:%lld field:%s",
+			  run->dst->sequence,
+			  run->dst->vb2_buf.timestamp,
+			  (run->dst->field == V4L2_FIELD_ALTERNATE) ?
+			  (run->dst->field == V4L2_FIELD_TOP ?
+			  " top" : " bottom") : "none");
+
+	}
 }
 
 static void visl_tpg_fill(struct visl_ctx *ctx, struct visl_run *run)
@@ -244,15 +255,17 @@ static void visl_tpg_fill(struct visl_ctx *ctx, struct visl_run *run)
 	frame_dprintk(ctx->dev, run->dst->sequence, "");
 	line++;
 
-	visl_get_ref_frames(ctx, buf, TPG_STR_BUF_SZ, run);
+	if (!stable_output) {
+		visl_get_ref_frames(ctx, buf, TPG_STR_BUF_SZ, run);
 
-	while ((line_str = strsep(&tmp, "\n")) && strlen(line_str)) {
-		tpg_gen_text(&ctx->tpg, basep, line++ * line_height, 16, line_str);
-		frame_dprintk(ctx->dev, run->dst->sequence, "%s\n", line_str);
-	}
+		while ((line_str = strsep(&tmp, "\n")) && strlen(line_str)) {
+			tpg_gen_text(&ctx->tpg, basep, line++ * line_height, 16, line_str);
+			frame_dprintk(ctx->dev, run->dst->sequence, "%s\n", line_str);
+		}
 
-	frame_dprintk(ctx->dev, run->dst->sequence, "");
-	line++;
+		frame_dprintk(ctx->dev, run->dst->sequence, "");
+		line++;
+	}
 
 	scnprintf(buf,
 		  TPG_STR_BUF_SZ,
@@ -280,28 +293,30 @@ static void visl_tpg_fill(struct visl_ctx *ctx, struct visl_run *run)
 		frame_dprintk(ctx->dev, run->dst->sequence, "%s\n", buf);
 	}
 
-	line++;
-	frame_dprintk(ctx->dev, run->dst->sequence, "");
-	scnprintf(buf, TPG_STR_BUF_SZ, "Output queue status:");
-	tpg_gen_text(&ctx->tpg, basep, line++ * line_height, 16, buf);
-	frame_dprintk(ctx->dev, run->dst->sequence, "%s\n", buf);
+	if (!stable_output) {
+		line++;
+		frame_dprintk(ctx->dev, run->dst->sequence, "");
+		scnprintf(buf, TPG_STR_BUF_SZ, "Output queue status:");
+		tpg_gen_text(&ctx->tpg, basep, line++ * line_height, 16, buf);
+		frame_dprintk(ctx->dev, run->dst->sequence, "%s\n", buf);
 
-	len = 0;
-	for (i = 0; i < out_q->num_buffers; i++) {
-		char entry[] = "index: %u, state: %s, request_fd: %d, ";
-		u32 old_len = len;
-		char *q_status = visl_get_vb2_state(out_q->bufs[i]->state);
+		len = 0;
+		for (i = 0; i < out_q->num_buffers; i++) {
+			char entry[] = "index: %u, state: %s, request_fd: %d, ";
+			u32 old_len = len;
+			char *q_status = visl_get_vb2_state(out_q->bufs[i]->state);
 
-		len += scnprintf(&buf[len], TPG_STR_BUF_SZ - len,
-				 entry, i, q_status,
-				 to_vb2_v4l2_buffer(out_q->bufs[i])->request_fd);
+			len += scnprintf(&buf[len], TPG_STR_BUF_SZ - len,
+					 entry, i, q_status,
+					 to_vb2_v4l2_buffer(out_q->bufs[i])->request_fd);
 
-		len += visl_fill_bytesused(to_vb2_v4l2_buffer(out_q->bufs[i]),
-					   &buf[len],
-					   TPG_STR_BUF_SZ - len);
+			len += visl_fill_bytesused(to_vb2_v4l2_buffer(out_q->bufs[i]),
+						   &buf[len],
+						   TPG_STR_BUF_SZ - len);
 
-		tpg_gen_text(&ctx->tpg, basep, line++ * line_height, 16, &buf[old_len]);
-		frame_dprintk(ctx->dev, run->dst->sequence, "%s", &buf[old_len]);
+			tpg_gen_text(&ctx->tpg, basep, line++ * line_height, 16, &buf[old_len]);
+			frame_dprintk(ctx->dev, run->dst->sequence, "%s", &buf[old_len]);
+		}
 	}
 
 	line++;
@@ -333,25 +348,27 @@ static void visl_tpg_fill(struct visl_ctx *ctx, struct visl_run *run)
 		frame_dprintk(ctx->dev, run->dst->sequence, "%s\n", buf);
 	}
 
-	line++;
-	frame_dprintk(ctx->dev, run->dst->sequence, "");
-	scnprintf(buf, TPG_STR_BUF_SZ, "Capture queue status:");
-	tpg_gen_text(&ctx->tpg, basep, line++ * line_height, 16, buf);
-	frame_dprintk(ctx->dev, run->dst->sequence, "%s\n", buf);
+	if (!stable_output) {
+		line++;
+		frame_dprintk(ctx->dev, run->dst->sequence, "");
+		scnprintf(buf, TPG_STR_BUF_SZ, "Capture queue status:");
+		tpg_gen_text(&ctx->tpg, basep, line++ * line_height, 16, buf);
+		frame_dprintk(ctx->dev, run->dst->sequence, "%s\n", buf);
 
-	len = 0;
-	for (i = 0; i < cap_q->num_buffers; i++) {
-		u32 old_len = len;
-		char *q_status = visl_get_vb2_state(cap_q->bufs[i]->state);
+		len = 0;
+		for (i = 0; i < cap_q->num_buffers; i++) {
+			u32 old_len = len;
+			char *q_status = visl_get_vb2_state(cap_q->bufs[i]->state);
 
-		len += scnprintf(&buf[len], TPG_STR_BUF_SZ - len,
-				 "index: %u, status: %s, timestamp: %llu, is_held: %d",
-				 cap_q->bufs[i]->index, q_status,
-				 cap_q->bufs[i]->timestamp,
-				 to_vb2_v4l2_buffer(cap_q->bufs[i])->is_held);
+			len += scnprintf(&buf[len], TPG_STR_BUF_SZ - len,
+					 "index: %u, status: %s, timestamp: %llu, is_held: %d",
+					 cap_q->bufs[i]->index, q_status,
+					 cap_q->bufs[i]->timestamp,
+					 to_vb2_v4l2_buffer(cap_q->bufs[i])->is_held);
 
-		tpg_gen_text(&ctx->tpg, basep, line++ * line_height, 16, &buf[old_len]);
-		frame_dprintk(ctx->dev, run->dst->sequence, "%s", &buf[old_len]);
+			tpg_gen_text(&ctx->tpg, basep, line++ * line_height, 16, &buf[old_len]);
+			frame_dprintk(ctx->dev, run->dst->sequence, "%s", &buf[old_len]);
+		}
 	}
 }
 
diff --git a/drivers/media/test-drivers/visl/visl.h b/drivers/media/test-drivers/visl/visl.h
index 31639f2e593d..5a81b493f121 100644
--- a/drivers/media/test-drivers/visl/visl.h
+++ b/drivers/media/test-drivers/visl/visl.h
@@ -85,6 +85,7 @@ extern unsigned int visl_dprintk_nframes;
 extern bool keep_bitstream_buffers;
 extern int bitstream_trace_frame_start;
 extern unsigned int bitstream_trace_nframes;
+extern bool stable_output;
 
 #define frame_dprintk(dev, current, fmt, arg...) \
 	do { \
-- 
2.41.0