mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 05:04:00 +08:00
drm/i915/overlay: Workaround i830 overlay activation bug.
On i830, there exists a bug where an overlay on pipe B requires the mode clock on pipe A in order to activate. So workaround this by activating pipe A when trying to enable the overlay on pipe B. References: [Bug 29007] GPU hang on video playback with overlay https://bugs.freedesktop.org/show_bug.cgi?id=29007 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
parent
5fe82c5ee1
commit
106dadacbe
@ -243,18 +243,76 @@ static int intel_overlay_do_wait_request(struct intel_overlay *overlay,
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Workaround for i830 bug where pipe a must be enable to change control regs */
|
||||
static int
|
||||
i830_activate_pipe_a(struct drm_device *dev)
|
||||
{
|
||||
drm_i915_private_t *dev_priv = dev->dev_private;
|
||||
struct intel_crtc *crtc;
|
||||
struct drm_crtc_helper_funcs *crtc_funcs;
|
||||
struct drm_display_mode vesa_640x480 = {
|
||||
DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25175, 640, 656,
|
||||
752, 800, 0, 480, 489, 492, 525, 0,
|
||||
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)
|
||||
}, *mode;
|
||||
|
||||
crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[0]);
|
||||
if (crtc->dpms_mode == DRM_MODE_DPMS_ON)
|
||||
return 0;
|
||||
|
||||
/* most i8xx have pipe a forced on, so don't trust dpms mode */
|
||||
if (I915_READ(PIPEACONF) & PIPEACONF_ENABLE)
|
||||
return 0;
|
||||
|
||||
crtc_funcs = crtc->base.helper_private;
|
||||
if (crtc_funcs->dpms == NULL)
|
||||
return 0;
|
||||
|
||||
DRM_DEBUG_DRIVER("Enabling pipe A in order to enable overlay\n");
|
||||
|
||||
mode = drm_mode_duplicate(dev, &vesa_640x480);
|
||||
drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
|
||||
if(!drm_crtc_helper_set_mode(&crtc->base, mode,
|
||||
crtc->base.x, crtc->base.y,
|
||||
crtc->base.fb))
|
||||
return 0;
|
||||
|
||||
crtc_funcs->dpms(&crtc->base, DRM_MODE_DPMS_ON);
|
||||
return 1;
|
||||
}
|
||||
|
||||
static void
|
||||
i830_deactivate_pipe_a(struct drm_device *dev)
|
||||
{
|
||||
drm_i915_private_t *dev_priv = dev->dev_private;
|
||||
struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[0];
|
||||
struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
|
||||
|
||||
crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
|
||||
}
|
||||
|
||||
/* overlay needs to be disable in OCMD reg */
|
||||
static int intel_overlay_on(struct intel_overlay *overlay)
|
||||
{
|
||||
struct drm_device *dev = overlay->dev;
|
||||
struct drm_i915_gem_request *request;
|
||||
int pipe_a_quirk = 0;
|
||||
int ret;
|
||||
|
||||
BUG_ON(overlay->active);
|
||||
overlay->active = 1;
|
||||
|
||||
if (IS_I830(dev)) {
|
||||
pipe_a_quirk = i830_activate_pipe_a(dev);
|
||||
if (pipe_a_quirk < 0)
|
||||
return pipe_a_quirk;
|
||||
}
|
||||
|
||||
request = kzalloc(sizeof(*request), GFP_KERNEL);
|
||||
if (request == NULL)
|
||||
return -ENOMEM;
|
||||
if (request == NULL) {
|
||||
ret = -ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
|
||||
BEGIN_LP_RING(4);
|
||||
OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_ON);
|
||||
@ -263,8 +321,13 @@ static int intel_overlay_on(struct intel_overlay *overlay)
|
||||
OUT_RING(MI_NOOP);
|
||||
ADVANCE_LP_RING();
|
||||
|
||||
return intel_overlay_do_wait_request(overlay, request, true,
|
||||
NEEDS_WAIT_FOR_FLIP);
|
||||
ret = intel_overlay_do_wait_request(overlay, request, true,
|
||||
NEEDS_WAIT_FOR_FLIP);
|
||||
out:
|
||||
if (pipe_a_quirk)
|
||||
i830_deactivate_pipe_a(dev);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* overlay needs to be enabled in OCMD reg */
|
||||
|
Loading…
Reference in New Issue
Block a user