drm/i915: add lpt_init_pch_refclk
We need this code to init the PCH SSC refclk and the FDI registers.
The BIOS does this too and that's why VGA worked before this patch,
until you tried to suspend the machine...
This patch implements the "Sequence to enable CLKOUT_DP for FDI usage
and configure PCH FDI/IO" from our documentation.
v2:
- Squash Damien Lespiau's reset spelling fix on top.
- Add a comment that we don't need to bother about the ULT special
case Damien noticed, since ULT won't have VGA.
- Add a comment to rip out the SDV codepaths once haswell ships for
real.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> (v1)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 0760425..acf768d 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3843,7 +3843,9 @@
#define FDI_PHASE_SYNC_EN(pipe) (1<<(FDIA_PHASE_SYNC_SHIFT_EN - ((pipe) * 2)))
#define FDI_BC_BIFURCATION_SELECT (1 << 12)
#define SOUTH_CHICKEN2 0xc2004
-#define DPLS_EDP_PPS_FIX_DIS (1<<0)
+#define FDI_MPHY_IOSFSB_RESET_STATUS (1<<13)
+#define FDI_MPHY_IOSFSB_RESET_CTL (1<<12)
+#define DPLS_EDP_PPS_FIX_DIS (1<<0)
#define _FDI_RXA_CHICKEN 0xc200c
#define _FDI_RXB_CHICKEN 0xc2010
@@ -4555,10 +4557,12 @@
#define SBI_SSCDIVINTPHASE_PROPAGATE (1<<0)
#define SBI_SSCCTL 0x020c
#define SBI_SSCCTL6 0x060C
+#define SBI_SSCCTL_PATHALT (1<<3)
#define SBI_SSCCTL_DISABLE (1<<0)
#define SBI_SSCAUXDIV6 0x0610
#define SBI_SSCAUXDIV_FINALDIV2SEL(x) ((x)<<4)
#define SBI_DBUFF0 0x2a00
+#define SBI_DBUFF0_ENABLE (1<<0)
/* LPT PIXCLK_GATE */
#define PIXCLK_GATE 0xC6020