We were configuring SR7 very strangely for 16bpp and didn't properly
differenciate between depth 15 and 16. This fixes it (and both
appear to work at least on ppc)
Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/cirrus/cirrus_mode.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/cirrus/cirrus_mode.c b/drivers/gpu/drm/cirrus/cirrus_mode.c
index e3d2dc0..1566853 100644
--- a/drivers/gpu/drm/cirrus/cirrus_mode.c
+++ b/drivers/gpu/drm/cirrus/cirrus_mode.c
@@ -269,13 +269,14 @@ static int cirrus_crtc_mode_set(struct drm_crtc *crtc,
sr07 = RREG8(SEQ_DATA);
sr07 &= 0xe0;
hdr = 0;
+
switch (crtc->fb->bits_per_pixel) {
case 8:
sr07 |= 0x11;
break;
case 16:
- sr07 |= 0xc1;
- hdr = 0xc0;
+ sr07 |= 0x17;
+ hdr = (crtc->fb->depth == 16) ? 0xc1 : 0xc0;
break;
case 24:
sr07 |= 0x15;
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