Dear Mario,
On 18.03.19 18:19, Mario Kleiner wrote:
In VRR mode, proper vblank/pageflip timestamps can only be computed
after the display scanout position has left front-porch. Therefore
delay calls to drm_crtc_handle_vblank(), and thereby calls to
drm_update_vblank_count() and pageflip event delivery, to after the
end of front-porch when in VRR mode.
We add a new vupdate irq, which triggers at the end of the vupdate
interval, ie. at the end of vblank, and calls the core vblank handler
function. The new irq handler is not executed in standard non-VRR
mode, so vblank handling for fixed refresh rate mode is identical
to the past implementation.
Signed-off-by: Mario Kleiner <mario.kleiner.de@xxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 +
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 129 ++++++++++++++++++++-
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 9 ++
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c | 22 ++++
.../amd/display/dc/irq/dce110/irq_service_dce110.c | 7 +-
.../amd/display/dc/irq/dce120/irq_service_dce120.c | 7 +-
.../amd/display/dc/irq/dce80/irq_service_dce80.c | 6 +-
.../amd/display/dc/irq/dcn10/irq_service_dcn10.c | 40 +++++--
8 files changed, 205 insertions(+), 16 deletions(-)
[…]
`scripts/checkpatch.pl` shows two errors on your commit.
+ /* Use VUPDATE interrupt */
+ for (i = VISLANDS30_IV_SRCID_D1_V_UPDATE_INT; i <= VISLANDS30_IV_SRCID_D6_V_UPDATE_INT; i+=2) {
ERROR: spaces required around that '+=' (ctx:VxV)
#107: FILE: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c:1490:
+ for (i = VISLANDS30_IV_SRCID_D1_V_UPDATE_INT; i <=
VISLANDS30_IV_SRCID_D6_V_UPDATE_INT; i+=2) {
^
[…]
static inline int dm_set_vblank(struct drm_crtc *crtc, bool enable)
{
enum dc_irq_source irq_source;
struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
struct amdgpu_device *adev = crtc->dev->dev_private;
+ struct dm_crtc_state *acrtc_state = to_dm_crtc_state(crtc->state);
+ int rc = 0;
+
+ if (enable) {
+ /* vblank irq on -> Only need vupdate irq in vrr mode */
+ if (amdgpu_dm_vrr_active(acrtc_state))
+ rc = dm_set_vupdate_irq(crtc, true);
+ }
+ else {
+ /* vblank irq off -> vupdate irq off */
+ rc = dm_set_vupdate_irq(crtc, false);
+ }
ERROR: else should follow close brace '}'
#198: FILE: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c:3346:
+ }
+ else {
Also:
WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
#258: FILE: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c:679:
+ unsigned crtc_id,
[…]
Kind regards,
Paul
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