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drm/komeda: Optionally dump DRM state on interrupts 

It's potentially useful information when diagnosing error/warn IRQs, so
dump it to dmesg with a drm_info_printer. Hide this extra debug dumping
behind another komeda_dev->err_verbosity bit.

Note that there's not much sense in dumping it for INFO events,
since the VSYNC event will swamp the log.

Reviewed-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Mihail Atanassov <mihail.atanassov@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191107114155.54307-4-mihail.atanassov@arm.com
This commit is contained in:
Mihail Atanassov 2019-11-07 11:42:36 +00:00 committed by Mihail Atanassov
parent 9a673215bd
commit 393389347c
2 changed files with 11 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/gpu/drm/arm/display/komeda/komeda_dev.h
View File

@ -205,11 +205,14 @@ struct komeda_dev {
/**
* @err_verbosity: bitmask for how much extra info to print on error
*
* See KOMEDA_DEV_* macros for details.
* See KOMEDA_DEV_* macros for details. Low byte contains the debug
* level categories, the high byte contains extra debug options.
*/
u16 err_verbosity;
/* Print a single line per error per frame with error events. */
#define KOMEDA_DEV_PRINT_ERR_EVENTS BIT(0)
/* Dump DRM state on an error or warning event. */
#define KOMEDA_DEV_PRINT_DUMP_STATE_ON_EVENT BIT(8)
};
static inline bool

8
drivers/gpu/drm/arm/display/komeda/komeda_event.c
View File

@ -4,6 +4,7 @@
* Author: James.Qian.Wang <james.qian.wang@arm.com>
*
*/
#include <drm/drm_atomic.h>
#include <drm/drm_print.h>
#include "komeda_dev.h"
@ -113,6 +114,7 @@ void komeda_print_events(struct komeda_events *evts, struct drm_device *dev)
static bool en_print = true;
struct komeda_dev *mdev = dev->dev_private;
u16 const err_verbosity = mdev->err_verbosity;
u64 evts_mask = evts->global | evts->pipes[0] | evts->pipes[1];
/* reduce the same msg print, only print the first evt for one frame */
if (evts->global || is_new_frame(evts))
@ -123,9 +125,10 @@ void komeda_print_events(struct komeda_events *evts, struct drm_device *dev)
if (err_verbosity & KOMEDA_DEV_PRINT_ERR_EVENTS)
print_evts |= KOMEDA_ERR_EVENTS;
if ((evts->global | evts->pipes[0] | evts->pipes[1]) & print_evts) {
if (evts_mask & print_evts) {
char msg[256];
struct komeda_str str;
struct drm_printer p = drm_info_printer(dev->dev);
str.str = msg;
str.sz = sizeof(msg);
@ -139,6 +142,9 @@ void komeda_print_events(struct komeda_events *evts, struct drm_device *dev)
evt_str(&str, evts->pipes[1]);
DRM_ERROR("err detect: %s\n", msg);
if ((err_verbosity & KOMEDA_DEV_PRINT_DUMP_STATE_ON_EVENT) &&
(evts_mask & (KOMEDA_ERR_EVENTS | KOMEDA_WARN_EVENTS)))
drm_state_dump(dev, &p);
en_print = false;
}