On Fri, Oct 09, 2015 at 10:57:37PM +0300, ville.syrjala@linux.intel.com wrote:
From: Ville Syrjälä ville.syrjala@linux.intel.com
Add a new debug class for _verbose_ debug message from the vblank code. That is message we spew out potentially for every vblank interrupt. Thierry already got annoyed at the spew, and now I managed to lock up my box with these debug prints (seems serial console + a few debug prints every vblank aren't a good combination).
Or should I maybe call it DRM_DEBUG_IRQ?
I like _VBL since that's what this is about. The irq helpers are really, really tiny in drm_irq.c and mostly just here for *bsd/linux abstraction i.e. historical reasons.
Both patches applied to drm-misc.
Thanks, Daniel
Cc: Thierry Reding thierry.reding@gmail.com Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com
drivers/gpu/drm/drm_irq.c | 22 +++++++++++----------- include/drm/drmP.h | 11 ++++++++++- 2 files changed, 21 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c index bc2e7c6..eba6337 100644 --- a/drivers/gpu/drm/drm_irq.c +++ b/drivers/gpu/drm/drm_irq.c @@ -213,17 +213,17 @@ static void drm_update_vblank_count(struct drm_device *dev, unsigned int pipe, diff = DIV_ROUND_CLOSEST_ULL(diff_ns, framedur_ns);
if (diff == 0 && flags & DRM_CALLED_FROM_VBLIRQ)
DRM_DEBUG("crtc %u: Redundant vblirq ignored."" diff_ns = %lld, framedur_ns = %d)\n",pipe, (long long) diff_ns, framedur_ns);
DRM_DEBUG_VBL("crtc %u: Redundant vblirq ignored."" diff_ns = %lld, framedur_ns = %d)\n",pipe, (long long) diff_ns, framedur_ns);
- DRM_DEBUG("updating vblank count on crtc %u:"
" current=%u, diff=%u, hw=%u hw_last=%u\n",pipe, vblank->count, diff, cur_vblank, vblank->last);
DRM_DEBUG_VBL("updating vblank count on crtc %u:"
" current=%u, diff=%u, hw=%u hw_last=%u\n",pipe, vblank->count, diff, cur_vblank, vblank->last);if (diff == 0) { WARN_ON_ONCE(cur_vblank != vblank->last);
@@ -800,11 +800,11 @@ int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, etime = ktime_sub_ns(etime, delta_ns); *vblank_time = ktime_to_timeval(etime);
- DRM_DEBUG("crtc %u : v 0x%x p(%d,%d)@ %ld.%ld -> %ld.%ld [e %d us, %d rep]\n",
pipe, vbl_status, hpos, vpos,(long)tv_etime.tv_sec, (long)tv_etime.tv_usec,(long)vblank_time->tv_sec, (long)vblank_time->tv_usec,duration_ns/1000, i);
DRM_DEBUG_VBL("crtc %u : v 0x%x p(%d,%d)@ %ld.%ld -> %ld.%ld [e %d us, %d rep]\n",
pipe, vbl_status, hpos, vpos,(long)tv_etime.tv_sec, (long)tv_etime.tv_usec,(long)vblank_time->tv_sec, (long)vblank_time->tv_usec,duration_ns/1000, i);return ret;
} diff --git a/include/drm/drmP.h b/include/drm/drmP.h index 3dc56d3..4d3b842 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -107,6 +107,9 @@ struct dma_buf_attachment;
- ATOMIC: used in the atomic code.
This is the category used by the DRM_DEBUG_ATOMIC() macro.
- VBL: used for verbose debug message in the vblank code
This is the category used by the DRM_DEBUG_VBL() macro.
- Enabling verbose debug messages is done through the drm.debug parameter,
- each category being enabled by a bit.
@@ -114,7 +117,7 @@ struct dma_buf_attachment;
- drm.debug=0x2 will enable DRIVER messages
- drm.debug=0x3 will enable CORE and DRIVER messages
- ...
- drm.debug=0xf will enable all messages
- drm.debug=0x3f will enable all messages
- An interesting feature is that it's possible to enable verbose logging at
- run-time by echoing the debug value in its sysfs node:
@@ -125,6 +128,7 @@ struct dma_buf_attachment; #define DRM_UT_KMS 0x04 #define DRM_UT_PRIME 0x08 #define DRM_UT_ATOMIC 0x10 +#define DRM_UT_VBL 0x20
extern __printf(2, 3) void drm_ut_debug_printk(const char *function_name, @@ -217,6 +221,11 @@ void drm_err(const char *format, ...); if (unlikely(drm_debug & DRM_UT_ATOMIC)) \ drm_ut_debug_printk(__func__, fmt, ##args); \ } while (0) +#define DRM_DEBUG_VBL(fmt, args...) \
- do { \
if (unlikely(drm_debug & DRM_UT_VBL)) \drm_ut_debug_printk(__func__, fmt, ##args); \- } while (0)
/*@}*/
-- 2.4.9
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