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drm/rockchip: vop2: Report POST_BUF_EMPTY event to userspace

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Report ROCKCHIP_DRM_ERROR_EVENT_POST_BUF_EMPTY to userspace
if a POST_BUF_EMPTY storm lasts more than 1 minute.

The userspace should try to avoid use VOP for ovelay and scale
down after receive such event.

Change-Id: Ibd5be1cdb5a64708616e46e1729a16130e6afaf9
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
This commit is contained in:
Andy Yan
2024-10-21 10:47:03 +08:00
committed by Tao Huang
parent 953f382ba3
commit a2415accd4
1 changed files with 78 additions and 5 deletions
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83
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
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@@ -25,6 +25,7 @@
#include <linux/debugfs.h>
#include <linux/fixp-arith.h>
#include <linux/jiffies.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/module.h>
@@ -840,6 +841,11 @@ struct vop2_resource {
void __iomem *regs;
};
struct vop2_err_event {
u64 count;
unsigned long begin;
};
struct vop2 {
u32 version;
struct device *dev;
@@ -887,6 +893,11 @@ struct vop2 {
*/
bool report_iommu_fault;
/*
* report post buf empty error event to userspace
*/
bool report_post_buf_empty;
bool loader_protect;
bool aclk_rate_reset;
@@ -969,6 +980,8 @@ struct vop2 {
#endif
bool iommu_fault_in_progress;
struct vop2_err_event post_buf_empty;
/* aclk auto cs div */
u32 csu_div;
/* must put at the end of the struct */
@@ -4273,6 +4286,62 @@ static int vop3_get_esmart_lb_mode(struct vop2 *vop2)
return vop2->data->esmart_lb_mode_map[0].lb_map_value;
}
/*
* POST_BUF_EMPTY will cause hundreds thousands of interrupts strom per
* second.
*/
#define POST_BUF_EMPTY_COUNT_PER_MINUTE 100
static DEFINE_RATELIMIT_STATE(post_buf_empty_handler_rate, 5 * HZ, 10);
static int vop2_post_buf_empty_handler_rate_limit(void)
{
return __ratelimit(&post_buf_empty_handler_rate);
}
static void vop2_reset_post_buf_empty_handler_rate_limit(struct vop2 *vop2)
{
vop2->post_buf_empty.begin = 0;
vop2->post_buf_empty.count = 0;
}
static void vop2_handle_post_buf_empty(struct drm_crtc *crtc)
{
struct vop2_video_port *vp = to_vop2_video_port(crtc);
struct vop2 *vop2 = vp->vop2;
struct rockchip_drm_private *private = vop2->drm_dev->dev_private;
struct vop2_err_event *event = &vop2->post_buf_empty;
enum rockchip_drm_error_event_type type;
if (!vop2->report_post_buf_empty)
return;
type = ROCKCHIP_DRM_ERROR_EVENT_POST_BUF_EMPTY;
/*
* No need to handle POST_BUF_EMPTY if we are in iommu fault,
* because we will try to recovery from the iommu fault handle
*/
if (vop2->iommu_fault_in_progress)
return;
if (!event->begin)
event->begin = jiffies;
if (vop2_post_buf_empty_handler_rate_limit())
event->count++;
if (time_is_before_jiffies(event->begin + 60 * HZ)) {
if (event->count >= POST_BUF_EMPTY_COUNT_PER_MINUTE)
rockchip_drm_send_error_event(private, type);
DRM_DEV_ERROR(vop2->dev, "post_buf_err event count: %lld\n", event->count);
event->begin = 0;
event->count = 0;
}
}
static void vop2_initial(struct drm_crtc *crtc)
{
struct vop2_video_port *vp = to_vop2_video_port(crtc);
@@ -4618,6 +4687,7 @@ static void vop2_disable(struct drm_crtc *crtc)
* shortly after the recovery(Disable then enable) process done.
*/
rockchip_drm_reset_iommu_fault_handler_rate_limit();
vop2_reset_post_buf_empty_handler_rate_limit(vop2);
}
if (vop2->version == VOP_VERSION_RK3588 || vop2->version == VOP_VERSION_RK3576)
vop2_power_off_all_pd(vop2);
@@ -12594,10 +12664,7 @@ static irqreturn_t vop2_isr(int irq, void *data)
#define ERROR_HANDLER(x) \
do { \
if (active_irqs & x##_INTR) {\
if (x##_INTR == POST_BUF_EMPTY_INTR) \
DRM_DEV_ERROR_RATELIMITED(vop2->dev, #x " irq err at vp%d\n", vp->id); \
else \
DRM_DEV_ERROR_RATELIMITED(vop2->dev, #x " irq err\n"); \
DRM_DEV_ERROR_RATELIMITED(vop2->dev, #x " irq err\n"); \
active_irqs &= ~x##_INTR; \
ret = IRQ_HANDLED; \
} \
@@ -12670,7 +12737,12 @@ static irqreturn_t vop2_isr(int irq, void *data)
ret = IRQ_HANDLED;
}
ERROR_HANDLER(POST_BUF_EMPTY);
if (active_irqs & POST_BUF_EMPTY_INTR) {
vop2_handle_post_buf_empty(crtc);
DRM_DEV_ERROR_RATELIMITED(vop2->dev, "POST_BUF_EMPTY irq err at vp%d\n", vp->id);
active_irqs &= ~POST_BUF_EMPTY_INTR;
ret = IRQ_HANDLED;
}
/* Unhandled irqs are spurious. */
if (active_irqs)
@@ -14374,6 +14446,7 @@ static int vop2_bind(struct device *dev, struct device *master, void *data)
vop2->disable_win_move = of_property_read_bool(dev->of_node, "disable-win-move");
vop2->skip_ref_fb = of_property_read_bool(dev->of_node, "skip-ref-fb");
vop2->report_iommu_fault = of_property_read_bool(dev->of_node, "rockchip,report-iommu-fault");
vop2->report_post_buf_empty = of_property_read_bool(dev->of_node, "rockchip,report-post-buf-empty");
if (!is_vop3(vop2) ||
vop2->version == VOP_VERSION_RK3528 || vop2->version == VOP_VERSION_RK3562)
vop2->merge_irq = true;