From: Damien Lespiau Date: Tue, 15 Oct 2013 17:55:33 +0000 (+0100) Subject: drm/i915: Empty the circular buffer when asked for a new source X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4b584369c6d6b75c9dbfeeb0896853874d031897;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/i915: Empty the circular buffer when asked for a new source So we don't read out stale CRCs from a previous run left in the buffer. Signed-off-by: Damien Lespiau Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 787c50d194d4..ec9151afa240 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -1820,6 +1820,12 @@ static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe, if (pipe_crc->source && source) return -EINVAL; + /* none -> real source transition */ + if (source) { + atomic_set(&pipe_crc->head, 0); + atomic_set(&pipe_crc->tail, 0); + } + pipe_crc->source = source; switch (source) {