drivers: video: stm32_dcmi: add missing capability property

josuah · fabiobaltieri · commit ccaaaabba261 · 2025-09-18T15:44:27.000+01:00
In the DCMI video driver, set the caps.min_vbuf_count field to
indicate that two buffers are needed. Fix use of un-initialized
memory breaking the samples in some situations.

Signed-off-by: Josuah Demangeon &lt;me@josuah.net&gt;
diff --git a/drivers/video/video_stm32_dcmi.c b/drivers/video/video_stm32_dcmi.c
@@ -306,6 +306,9 @@ static int video_stm32_dcmi_get_caps(const struct device *dev, struct video_caps
 {
 	const struct video_stm32_dcmi_config *config = dev->config;
 
+	/* 2 buffers are needed for DCMI_MODE_CONTINUOUS */
+	caps->min_vbuf_count = 2;
+
 	/* DCMI produces full frames */
 	caps->min_line_count = caps->max_line_count = LINE_COUNT_HEIGHT;
 

Original file line number	Diff line number	Diff line change
`@@ -306,6 +306,9 @@ static int video_stm32_dcmi_get_caps(const struct device *dev, struct video_caps`
`306`	`306`	`{`
`307`	`307`	`const struct video_stm32_dcmi_config *config = dev->config;`
`308`	`308`
	`309`	`+ /* 2 buffers are needed for DCMI_MODE_CONTINUOUS */`
	`310`	`+ caps->min_vbuf_count = 2;`
	`311`	`+`
`309`	`312`	`/* DCMI produces full frames */`
`310`	`313`	`caps->min_line_count = caps->max_line_count = LINE_COUNT_HEIGHT;`
`311`	`314`