drm/i915: Use RCS flips on Ivybridge+
RCS flips do work on Iybridge+ so long as we can unmask the messages
through DERRMR. However, there are quite a few workarounds mentioned
regarding unmasking more than one event or triggering more than one
message through DERRMR. Those workarounds in principle prevent us from
performing pipelined flips (and asynchronous flips across multiple
planes) and equally apply to the "known good" BCS ring. Given that it
already appears to work, and also appears to work with unmasking all 3
planes at once (and queuing flips across multiple planes), be brave.
Bugzlla: https://bugs.freedesktop.org/show_bug.cgi?id=67600
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Lightly-tested-by: Stephane Marchesin <marchesin@icps.u-strasbg.fr>
Cc: Stephane Marchesin <marchesin@icps.u-strasbg.fr>
Cc: Ben Widawsky <ben@bwidawsk.net>
Tested-by: Stéphane Marchesin <marcheu@chromium.org>
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 b6a58f7..b2fa2a4 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -245,6 +245,7 @@
* address/value pairs. Don't overdue it, though, x <= 2^4 must hold!
*/
#define MI_LOAD_REGISTER_IMM(x) MI_INSTR(0x22, 2*x-1)
+#define MI_STORE_REGISTER_MEM(x) MI_INSTR(0x24, 2*x-1)
#define MI_FLUSH_DW MI_INSTR(0x26, 1) /* for GEN6 */
#define MI_FLUSH_DW_STORE_INDEX (1<<21)
#define MI_INVALIDATE_TLB (1<<18)
@@ -693,6 +694,23 @@
#define FPGA_DBG_RM_NOCLAIM (1<<31)
#define DERRMR 0x44050
+#define DERRMR_PIPEA_SCANLINE (1<<0)
+#define DERRMR_PIPEA_PRI_FLIP_DONE (1<<1)
+#define DERRMR_PIPEA_SPR_FLIP_DONE (1<<2)
+#define DERRMR_PIPEA_VBLANK (1<<3)
+#define DERRMR_PIPEA_HBLANK (1<<5)
+#define DERRMR_PIPEB_SCANLINE (1<<8)
+#define DERRMR_PIPEB_PRI_FLIP_DONE (1<<9)
+#define DERRMR_PIPEB_SPR_FLIP_DONE (1<<10)
+#define DERRMR_PIPEB_VBLANK (1<<11)
+#define DERRMR_PIPEB_HBLANK (1<<13)
+/* Note that PIPEC is not a simple translation of PIPEA/PIPEB */
+#define DERRMR_PIPEC_SCANLINE (1<<14)
+#define DERRMR_PIPEC_PRI_FLIP_DONE (1<<15)
+#define DERRMR_PIPEC_SPR_FLIP_DONE (1<<20)
+#define DERRMR_PIPEC_VBLANK (1<<21)
+#define DERRMR_PIPEC_HBLANK (1<<22)
+
/* GM45+ chicken bits -- debug workaround bits that may be required
* for various sorts of correct behavior. The top 16 bits of each are
