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drm/i915: Add support for detecting vblanks when hw frame counter is unavailable. 

This uses the newly created drm_accurate_vblank_count_and_time to accurately
get a vblank count when the hw counter is unavailable.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1463490484-19540-6-git-send-email-maarten.lankhorst@linux.intel.com
Reviewed-by: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>
This commit is contained in:
Maarten Lankhorst 2016-05-17 15:07:48 +02:00
parent 5251f04e0c
commit a2991414c4
3 changed files with 15 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/gpu/drm/i915/intel_display.c
View File

@ -13413,6 +13413,16 @@ static int intel_atomic_prepare_commit(struct drm_device *dev,
return ret;
}
u32 intel_crtc_get_vblank_counter(struct intel_crtc *crtc)
{
struct drm_device *dev = crtc->base.dev;
if (!dev->max_vblank_count)
return drm_accurate_vblank_count(&crtc->base);
return dev->driver->get_vblank_counter(dev, crtc->pipe);
}
static void intel_atomic_wait_for_vblanks(struct drm_device *dev,
struct drm_i915_private *dev_priv,
unsigned crtc_mask)

3
drivers/gpu/drm/i915/intel_drv.h
View File

@ -1178,6 +1178,9 @@ intel_wait_for_vblank_if_active(struct drm_device *dev, int pipe)
if (crtc->active)
intel_wait_for_vblank(dev, pipe);
}
u32 intel_crtc_get_vblank_counter(struct intel_crtc *crtc);
int ironlake_get_lanes_required(int target_clock, int link_bw, int bpp);
void vlv_wait_port_ready(struct drm_i915_private *dev_priv,
struct intel_digital_port *dport,

8
drivers/gpu/drm/i915/intel_sprite.c
View File

@ -80,9 +80,7 @@ static int usecs_to_scanlines(const struct drm_display_mode *adjusted_mode,
*/
void intel_pipe_update_start(struct intel_crtc *crtc)
{
struct drm_device *dev = crtc->base.dev;
const struct drm_display_mode *adjusted_mode = &crtc->config->base.adjusted_mode;
enum pipe pipe = crtc->pipe;
long timeout = msecs_to_jiffies_timeout(1);
int scanline, min, max, vblank_start;
wait_queue_head_t *wq = drm_crtc_vblank_waitqueue(&crtc->base);
@ -139,8 +137,7 @@ void intel_pipe_update_start(struct intel_crtc *crtc)
crtc->debug.scanline_start = scanline;
crtc->debug.start_vbl_time = ktime_get();
crtc->debug.start_vbl_count =
dev->driver->get_vblank_counter(dev, pipe);
crtc->debug.start_vbl_count = intel_crtc_get_vblank_counter(crtc);
trace_i915_pipe_update_vblank_evaded(crtc);
}
@ -156,10 +153,9 @@ void intel_pipe_update_start(struct intel_crtc *crtc)
*/
void intel_pipe_update_end(struct intel_crtc *crtc)
{
struct drm_device *dev = crtc->base.dev;
enum pipe pipe = crtc->pipe;
int scanline_end = intel_get_crtc_scanline(crtc);
u32 end_vbl_count = dev->driver->get_vblank_counter(dev, pipe);
u32 end_vbl_count = intel_crtc_get_vblank_counter(crtc);
ktime_t end_vbl_time = ktime_get();
trace_i915_pipe_update_end(crtc, end_vbl_count, scanline_end);