From: Zhe Wang Date: Thu, 20 Nov 2014 13:42:56 +0000 (+0000) Subject: drm/i915: Gen9 shadowed registers X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7c859007fdae545b71db7a2d58a9214da5806800;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/i915: Gen9 shadowed registers For MMIO registers which are shadowed, force wake is not needed to write to these registers. v2: Rebase on top of nightly (Damien) v3: Rebase on top of "Gen9 multiple-engine forcewake" changes v4: (Mika, Bob, done by Damien) - Reorder the shadowed registers by popularity Reviewed-by: Mika Kuoppala Signed-off-by: Zhe Wang Signed-off-by: Damien Lespiau Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index 4c10faa5783f..1a3e485a4f97 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -1026,12 +1026,36 @@ chv_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) REG_WRITE_FOOTER; \ } +static const u32 gen9_shadowed_regs[] = { + RING_TAIL(RENDER_RING_BASE), + RING_TAIL(GEN6_BSD_RING_BASE), + RING_TAIL(VEBOX_RING_BASE), + RING_TAIL(BLT_RING_BASE), + FORCEWAKE_BLITTER_GEN9, + FORCEWAKE_RENDER_GEN9, + FORCEWAKE_MEDIA_GEN9, + GEN6_RPNSWREQ, + GEN6_RC_VIDEO_FREQ, + /* TODO: Other registers are not yet used */ +}; + +static bool is_gen9_shadowed(struct drm_i915_private *dev_priv, u32 reg) +{ + int i; + for (i = 0; i < ARRAY_SIZE(gen9_shadowed_regs); i++) + if (reg == gen9_shadowed_regs[i]) + return true; + + return false; +} + #define __gen9_write(x) \ static void \ gen9_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, \ bool trace) { \ REG_WRITE_HEADER; \ - if (!SKL_NEEDS_FORCE_WAKE((dev_priv), (reg))) { \ + if (!SKL_NEEDS_FORCE_WAKE((dev_priv), (reg)) || \ + is_gen9_shadowed(dev_priv, reg)) { \ __raw_i915_write##x(dev_priv, reg, val); \ } else { \ unsigned fwengine = 0; \