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gma500: Workaround for Medfield/Cedarview cursor bug 

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Cox 2011-07-05 15:44:46 +01:00 committed by Greg Kroah-Hartman
parent 6a8ca6f5ff
commit 52b6ba09ee
1 changed files with 14 additions and 0 deletions
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14
drivers/staging/gma500/psb_intel_display.c
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@ -1278,6 +1278,19 @@ const struct drm_crtc_funcs psb_intel_crtc_funcs = {
.destroy = psb_intel_crtc_destroy,
};
/*
* Set the default value of cursor control and base register
* to zero. This is a workaround for h/w defect on Oaktrail
*/
static void psb_intel_cursor_init(struct drm_device *dev, int pipe)
{
u32 control[3] = { CURACNTR, CURBCNTR, CURCCNTR };
u32 base[3] = { CURABASE, CURBBASE, CURCBASE };
REG_WRITE(control[pipe], 0);
REG_WRITE(base[pipe], 0);
}
void psb_intel_crtc_init(struct drm_device *dev, int pipe,
struct psb_intel_mode_device *mode_dev)
{
@ -1341,6 +1354,7 @@ void psb_intel_crtc_init(struct drm_device *dev, int pipe,
psb_intel_crtc->mode_set.connectors =
(struct drm_connector **) (psb_intel_crtc + 1);
psb_intel_crtc->mode_set.num_connectors = 0;
psb_intel_cursor_init(dev, pipe);
}
int psb_intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,