[PATCH 3.16.y-ckt 011/118] drm/radeon: unpin cursor BOs on suspend and pin them again on resume (v2)

From: Luis Henriques
Date: Wed Aug 12 2015 - 05:43:53 EST


3.16.7-ckt16 -stable review patch. If anyone has any objections, please let me know.

------------------

From: Grigori Goronzy <greg@xxxxxxxxxxxx>

commit f3cbb17bcf676a2fc6aedebe9fbebd59e550c51a upstream.

Everything is evicted from VRAM before suspend, so we need to make
sure all BOs are unpinned and re-pinned after resume. Fixes broken
mouse cursor after resume introduced by commit b9729b17.

[Michel DÃnzer: Add pinning BOs on resume]

v2:
[Alex Deucher: merge cursor unpin into fb unpin loop]

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=100541
Reviewed-by: Christian KÃnig <christian.koenig@xxxxxxx> (v1)
Signed-off-by: Grigori Goronzy <greg@xxxxxxxxxxxx>
Signed-off-by: Michel DÃnzer <michel.daenzer@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/radeon_device.c | 34 +++++++++++++++++++++++++++++++++-
1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index e5ed5ee9d832..ca470fb17aa4 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -1484,11 +1484,21 @@ int radeon_suspend_kms(struct drm_device *dev, bool suspend, bool fbcon)
drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
}

- /* unpin the front buffers */
+ /* unpin the front buffers and cursors */
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+ struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
struct radeon_framebuffer *rfb = to_radeon_framebuffer(crtc->primary->fb);
struct radeon_bo *robj;

+ if (radeon_crtc->cursor_bo) {
+ struct radeon_bo *robj = gem_to_radeon_bo(radeon_crtc->cursor_bo);
+ r = radeon_bo_reserve(robj, false);
+ if (r == 0) {
+ radeon_bo_unpin(robj);
+ radeon_bo_unreserve(robj);
+ }
+ }
+
if (rfb == NULL || rfb->obj == NULL) {
continue;
}
@@ -1554,6 +1564,7 @@ int radeon_resume_kms(struct drm_device *dev, bool resume, bool fbcon)
{
struct drm_connector *connector;
struct radeon_device *rdev = dev->dev_private;
+ struct drm_crtc *crtc;
int r;

if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
@@ -1593,6 +1604,27 @@ int radeon_resume_kms(struct drm_device *dev, bool resume, bool fbcon)

radeon_restore_bios_scratch_regs(rdev);

+ /* pin cursors */
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+ struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
+
+ if (radeon_crtc->cursor_bo) {
+ struct radeon_bo *robj = gem_to_radeon_bo(radeon_crtc->cursor_bo);
+ r = radeon_bo_reserve(robj, false);
+ if (r == 0) {
+ /* Only 27 bit offset for legacy cursor */
+ r = radeon_bo_pin_restricted(robj,
+ RADEON_GEM_DOMAIN_VRAM,
+ ASIC_IS_AVIVO(rdev) ?
+ 0 : 1 << 27,
+ &radeon_crtc->cursor_addr);
+ if (r != 0)
+ DRM_ERROR("Failed to pin cursor BO (%d)\n", r);
+ radeon_bo_unreserve(robj);
+ }
+ }
+ }
+
/* init dig PHYs, disp eng pll */
if (rdev->is_atom_bios) {
radeon_atom_encoder_init(rdev);
--
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