mirror of
https://github.com/Ysurac/openmptcprouter.git
synced 2025-02-15 04:42:02 +00:00
63 lines
2.3 KiB
Diff
63 lines
2.3 KiB
Diff
From 1b8a817007a5a6b83b9071b4e8d83e2dd9eaa2ee Mon Sep 17 00:00:00 2001
|
|
From: Naushir Patuck <naush@raspberrypi.com>
|
|
Date: Mon, 8 Aug 2022 10:01:41 +0100
|
|
Subject: [PATCH] media: bcm2835-unicam: Correctly handle FS + FE ISR condtion
|
|
|
|
If we get a simultaneous FS + FE interrupt for the same frame, it cannot be
|
|
marked as completed and returned to userland as the framebuffer will be refilled
|
|
by Unicam on the next sensor frame. Additionally, the timestamp will be set to 0
|
|
as the FS interrupt handling code will not have run yet.
|
|
|
|
To avoid these problems, the frame is considered dropped in the FE handler,
|
|
and will be returned to userland on the subsequent sensor frame.
|
|
|
|
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
|
|
---
|
|
.../media/platform/bcm2835/bcm2835-unicam.c | 28 +++++++++++++------
|
|
1 file changed, 20 insertions(+), 8 deletions(-)
|
|
|
|
--- a/drivers/media/platform/bcm2835/bcm2835-unicam.c
|
|
+++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
|
|
@@ -919,7 +919,9 @@ static irqreturn_t unicam_isr(int irq, v
|
|
* to use.
|
|
*/
|
|
for (i = 0; i < ARRAY_SIZE(unicam->node); i++) {
|
|
- if (!unicam->node[i].streaming)
|
|
+ struct unicam_node *node = &unicam->node[i];
|
|
+
|
|
+ if (!node->streaming)
|
|
continue;
|
|
|
|
/*
|
|
@@ -929,14 +931,24 @@ static irqreturn_t unicam_isr(int irq, v
|
|
* + FS + LS). In this case, we cannot signal the buffer
|
|
* as complete, as the HW will reuse that buffer.
|
|
*/
|
|
- if (unicam->node[i].cur_frm &&
|
|
- unicam->node[i].cur_frm != unicam->node[i].next_frm) {
|
|
- unicam_process_buffer_complete(&unicam->node[i],
|
|
- sequence);
|
|
- unicam->node[i].cur_frm = unicam->node[i].next_frm;
|
|
- unicam->node[i].next_frm = NULL;
|
|
+ if (node->cur_frm && node->cur_frm != node->next_frm) {
|
|
+ /*
|
|
+ * This condition checks if FE + FS for the same
|
|
+ * frame has occurred. In such cases, we cannot
|
|
+ * return out the frame, as no buffer handling
|
|
+ * or timestamping has yet been done as part of
|
|
+ * the FS handler.
|
|
+ */
|
|
+ if (!node->cur_frm->vb.vb2_buf.timestamp) {
|
|
+ unicam_dbg(2, unicam, "ISR: FE without FS, dropping frame\n");
|
|
+ continue;
|
|
+ }
|
|
+
|
|
+ unicam_process_buffer_complete(node, sequence);
|
|
+ node->cur_frm = node->next_frm;
|
|
+ node->next_frm = NULL;
|
|
} else {
|
|
- unicam->node[i].cur_frm = unicam->node[i].next_frm;
|
|
+ node->cur_frm = node->next_frm;
|
|
}
|
|
}
|
|
unicam->sequence++;
|