mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-27 01:11:14 +00:00
62b7f5931c
bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
(cherry-picked from commit f07e572f64)
86 lines
2.7 KiB
Diff
86 lines
2.7 KiB
Diff
From e399911ab20b650a031d883554180463804ac3f7 Mon Sep 17 00:00:00 2001
|
|
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
|
|
Date: Tue, 4 Jun 2019 12:14:30 +0100
|
|
Subject: [PATCH] drm: vc4: Add status of which display is updated
|
|
through vblank
|
|
|
|
Previously multiple displays were slaved off the same SMI
|
|
interrupt, triggered by HVS channel 1 (HDMI0).
|
|
This doesn't work if you only have a DPI or DSI screen (HVS channel
|
|
0), and gives slightly erroneous results with dual HDMI as the
|
|
events for HDMI1 are incorrect.
|
|
|
|
Use SMIDSW0 and SMIDSW1 registers to denote which display has
|
|
triggered the vblank.
|
|
Handling should be backwards compatible with older firmware.
|
|
|
|
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
|
|
---
|
|
drivers/gpu/drm/vc4/vc4_firmware_kms.c | 41 ++++++++++++++++++++++----
|
|
1 file changed, 36 insertions(+), 5 deletions(-)
|
|
|
|
--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
|
|
+++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
|
|
@@ -233,8 +233,13 @@ static const struct vc_image_format *vc4
|
|
* hardware, which has only this one register.
|
|
*/
|
|
#define SMICS 0x0
|
|
+#define SMIDSW0 0x14
|
|
+#define SMIDSW1 0x1C
|
|
#define SMICS_INTERRUPTS (BIT(9) | BIT(10) | BIT(11))
|
|
|
|
+/* Flag to denote that the firmware is giving multiple display callbacks */
|
|
+#define SMI_NEW 0xabcd0000
|
|
+
|
|
#define vc4_crtc vc4_kms_crtc
|
|
#define to_vc4_crtc to_vc4_kms_crtc
|
|
struct vc4_crtc {
|
|
@@ -885,16 +890,42 @@ static irqreturn_t vc4_crtc_irq_handler(
|
|
int i;
|
|
u32 stat = readl(crtc_list[0]->regs + SMICS);
|
|
irqreturn_t ret = IRQ_NONE;
|
|
+ u32 chan;
|
|
|
|
if (stat & SMICS_INTERRUPTS) {
|
|
writel(0, crtc_list[0]->regs + SMICS);
|
|
|
|
- for (i = 0; crtc_list[i]; i++) {
|
|
- if (crtc_list[i]->vblank_enabled)
|
|
- drm_crtc_handle_vblank(&crtc_list[i]->base);
|
|
- vc4_crtc_handle_page_flip(crtc_list[i]);
|
|
- ret = IRQ_HANDLED;
|
|
+ chan = readl(crtc_list[0]->regs + SMIDSW0);
|
|
+
|
|
+ if ((chan & 0xFFFF0000) != SMI_NEW) {
|
|
+ /* Older firmware. Treat the one interrupt as vblank/
|
|
+ * complete for all crtcs.
|
|
+ */
|
|
+ for (i = 0; crtc_list[i]; i++) {
|
|
+ if (crtc_list[i]->vblank_enabled)
|
|
+ drm_crtc_handle_vblank(&crtc_list[i]->base);
|
|
+ vc4_crtc_handle_page_flip(crtc_list[i]);
|
|
+ }
|
|
+ } else {
|
|
+ if (chan & 1) {
|
|
+ writel(SMI_NEW, crtc_list[0]->regs + SMIDSW0);
|
|
+ if (crtc_list[0]->vblank_enabled)
|
|
+ drm_crtc_handle_vblank(&crtc_list[0]->base);
|
|
+ vc4_crtc_handle_page_flip(crtc_list[0]);
|
|
+ }
|
|
+
|
|
+ /* Check for the secondary display too */
|
|
+ chan = readl(crtc_list[0]->regs + SMIDSW1);
|
|
+
|
|
+ if (chan & 1) {
|
|
+ writel(SMI_NEW, crtc_list[0]->regs + SMIDSW1);
|
|
+ if (crtc_list[1]->vblank_enabled)
|
|
+ drm_crtc_handle_vblank(&crtc_list[1]->base);
|
|
+ vc4_crtc_handle_page_flip(crtc_list[1]);
|
|
+ }
|
|
}
|
|
+
|
|
+ ret = IRQ_HANDLED;
|
|
}
|
|
|
|
return ret;
|