v6 of the structure was programmed incorrectly:
args.v6.ulCrtcPclkFreq.ulPixelClock = cpu_to_le32(clock / 10);
ulPixelClock is a 24-bit bitfield. This statement would thus
do a 32-bit swap of (clock / 10) and drop the top 8 bits which
are ... the LSB. Not what we want. Instead use masks & shifts.
Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
---
(resent adding dri-devel to the CC list to hit patchwork)
drivers/gpu/drm/radeon/atombios_crtc.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c
b/drivers/gpu/drm/radeon/atombios_crtc.c
index 9541995..c742944 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -764,7 +764,7 @@ static void atombios_crtc_set_dcpll(struct drm_crtc *crtc,
}
static void atombios_crtc_program_pll(struct drm_crtc *crtc,
- int crtc_id,
+ u32 crtc_id,
int pll_id,
u32 encoder_mode,
u32 encoder_id,
@@ -851,8 +851,7 @@ static void atombios_crtc_program_pll(struct drm_crtc *crtc,
args.v5.ucPpll = pll_id;
break;
case 6:
- args.v6.ulCrtcPclkFreq.ucCRTC = crtc_id;
- args.v6.ulCrtcPclkFreq.ulPixelClock = cpu_to_le32(clock
/ 10);
+ args.v6.ulDispEngClkFreq = cpu_to_le32(crtc_id << 24 |
clock / 10);
args.v6.ucRefDiv = ref_div;
args.v6.usFbDiv = cpu_to_le16(fb_div);
args.v6.ulFbDivDecFrac = cpu_to_le32(frac_fb_div *
100000);
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