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drm/i915: Dynamically allocate the CRC circular buffer 

So we don't eat that memory when not needed.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau 2013-10-15 18:55:34 +01:00 committed by Daniel Vetter
parent 4b584369c6
commit e5f75aca19
2 changed files with 13 additions and 1 deletions
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12
drivers/gpu/drm/i915/i915_debugfs.c
View File

@ -1822,6 +1822,12 @@ static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe,
/* none -> real source transition */
if (source) {
pipe_crc->entries = kzalloc(sizeof(*pipe_crc->entries) *
INTEL_PIPE_CRC_ENTRIES_NR,
GFP_KERNEL);
if (!pipe_crc->entries)
return -ENOMEM;
atomic_set(&pipe_crc->head, 0);
atomic_set(&pipe_crc->tail, 0);
}
@ -1847,6 +1853,12 @@ static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe,
I915_WRITE(PIPE_CRC_CTL(pipe), val);
POSTING_READ(PIPE_CRC_CTL(pipe));
/* real source -> none transition */
if (source == INTEL_PIPE_CRC_SOURCE_NONE) {
kfree(pipe_crc->entries);
pipe_crc->entries = NULL;
}
return 0;
}

2
drivers/gpu/drm/i915/i915_drv.h
View File

@ -1232,7 +1232,7 @@ struct intel_pipe_crc_entry {
#define INTEL_PIPE_CRC_ENTRIES_NR 128
struct intel_pipe_crc {
struct intel_pipe_crc_entry entries[INTEL_PIPE_CRC_ENTRIES_NR];
struct intel_pipe_crc_entry *entries;
enum intel_pipe_crc_source source;
atomic_t head, tail;
};