[Intel-gfx] [PATCH 04/16] drm/i915: Sample the frame counter instead of a timestamp for CRCs

[Damien Lespiau]

Signed-off-by: Damien Lespiau <damien.lesp...@intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 4 ++--
 drivers/gpu/drm/i915/i915_drv.h     | 2 +-
 drivers/gpu/drm/i915/i915_irq.c     | 8 ++------
 3 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c 
b/drivers/gpu/drm/i915/i915_debugfs.c
index 991abff..58c6fd4 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1748,14 +1748,14 @@ static int i915_pipe_crc(struct seq_file *m, void *data)
                return 0;
        }
 
-       seq_puts(m, " timestamp     CRC1     CRC2     CRC3     CRC4     
CRC5\n");
+       seq_puts(m, "  frame    CRC1     CRC2     CRC3     CRC4     CRC5\n");
        head = atomic_read(&pipe_crc->head);
        tail = atomic_read(&pipe_crc->tail);
 
        while (CIRC_CNT(head, tail, INTEL_PIPE_CRC_ENTRIES_NR) >= 1) {
                struct intel_pipe_crc_entry *entry = &pipe_crc->entries[tail];
 
-               seq_printf(m, "%12u %8x %8x %8x %8x %8x\n", entry->timestamp,
+               seq_printf(m, "%8u %8x %8x %8x %8x %8x\n", entry->frame,
                           entry->crc[0], entry->crc[1], entry->crc[2],
                           entry->crc[3], entry->crc[4]);
 
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 7a1ed3a..cd87919 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1228,7 +1228,7 @@ enum intel_pipe_crc_source {
 };
 
 struct intel_pipe_crc_entry {
-       uint32_t timestamp;
+       uint32_t frame;
        uint32_t crc[5];
 };
 
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 73d76af..0b21828 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1195,8 +1195,7 @@ static void ivb_pipe_crc_update(struct drm_device *dev, 
enum pipe pipe)
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[pipe];
        struct intel_pipe_crc_entry *entry;
-       ktime_t now;
-       int ts, head, tail;
+       int head, tail;
 
        head = atomic_read(&pipe_crc->head);
        tail = atomic_read(&pipe_crc->tail);
@@ -1208,10 +1207,7 @@ static void ivb_pipe_crc_update(struct drm_device *dev, 
enum pipe pipe)
 
        entry = &pipe_crc->entries[head];
 
-       now = ktime_get();
-       ts = ktime_to_us(now);
-
-       entry->timestamp = ts;
+       entry->frame = I915_READ(PIPEFRAME(pipe));
        entry->crc[0] = I915_READ(PIPE_CRC_RES_1_IVB(pipe));
        entry->crc[1] = I915_READ(PIPE_CRC_RES_2_IVB(pipe));
        entry->crc[2] = I915_READ(PIPE_CRC_RES_3_IVB(pipe));
-- 
1.8.3.1

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