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author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2015-11-18 15:33:26 +0200 |
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committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2015-11-18 15:39:11 +0200 |
commit | f0f59a00a1c9be11038bef5aa735ed7dd985f9cf (patch) | |
tree | 1b76f7943326743233be6436376750ba4db78af4 /drivers/gpu/drm/i915/intel_audio.c | |
parent | 9bca5d0ca76c0ce029e2b43cf081863e7e8f6768 (diff) | |
download | op-kernel-dev-f0f59a00a1c9be11038bef5aa735ed7dd985f9cf.zip op-kernel-dev-f0f59a00a1c9be11038bef5aa735ed7dd985f9cf.tar.gz |
drm/i915: Type safe register read/write
Make I915_READ and I915_WRITE more type safe by wrapping the register
offset in a struct. This should eliminate most of the fumbles we've had
with misplaced parens.
This only takes care of normal mmio registers. We could extend the idea
to other register types and define each with its own struct. That way
you wouldn't be able to accidentally pass the wrong thing to a specific
register access function.
The gpio_reg setup is probably the ugliest thing left. But I figure I'd
just leave it for now, and wait for some divine inspiration to strike
before making it nice.
As for the generated code, it's actually a bit better sometimes. Eg.
looking at i915_irq_handler(), we can see the following change:
lea 0x70024(%rdx,%rax,1),%r9d
mov $0x1,%edx
- movslq %r9d,%r9
- mov %r9,%rsi
- mov %r9,-0x58(%rbp)
- callq *0xd8(%rbx)
+ mov %r9d,%esi
+ mov %r9d,-0x48(%rbp)
callq *0xd8(%rbx)
So previously gcc thought the register offset might be signed and
decided to sign extend it, just in case. The rest appears to be
mostly just minor shuffling of instructions.
v2: i915_mmio_reg_{offset,equal,valid}() helpers added
s/_REG/_MMIO/ in the register defines
mo more switch statements left to worry about
ring_emit stuff got sorted in a prep patch
cmd parser, lrc context and w/a batch buildup also in prep patch
vgpu stuff cleaned up and moved to a prep patch
all other unrelated changes split out
v3: Rebased due to BXT DSI/BLC, MOCS, etc.
v4: Rebased due to churn, s/i915_mmio_reg_t/i915_reg_t/
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1447853606-2751-1-git-send-email-ville.syrjala@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_audio.c')
-rw-r--r-- | drivers/gpu/drm/i915/intel_audio.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c index 7ee91fd..2609a244 100644 --- a/drivers/gpu/drm/i915/intel_audio.c +++ b/drivers/gpu/drm/i915/intel_audio.c @@ -161,9 +161,9 @@ static bool audio_rate_need_prog(struct intel_crtc *crtc, } static bool intel_eld_uptodate(struct drm_connector *connector, - int reg_eldv, uint32_t bits_eldv, - int reg_elda, uint32_t bits_elda, - int reg_edid) + i915_reg_t reg_eldv, uint32_t bits_eldv, + i915_reg_t reg_elda, uint32_t bits_elda, + i915_reg_t reg_edid) { struct drm_i915_private *dev_priv = connector->dev->dev_private; uint8_t *eld = connector->eld; @@ -364,8 +364,7 @@ static void ilk_audio_codec_disable(struct intel_encoder *encoder) enum port port = intel_dig_port->port; enum pipe pipe = intel_crtc->pipe; uint32_t tmp, eldv; - int aud_config; - int aud_cntrl_st2; + i915_reg_t aud_config, aud_cntrl_st2; DRM_DEBUG_KMS("Disable audio codec on port %c, pipe %c\n", port_name(port), pipe_name(pipe)); @@ -416,10 +415,7 @@ static void ilk_audio_codec_enable(struct drm_connector *connector, uint32_t eldv; uint32_t tmp; int len, i; - int hdmiw_hdmiedid; - int aud_config; - int aud_cntl_st; - int aud_cntrl_st2; + i915_reg_t hdmiw_hdmiedid, aud_config, aud_cntl_st, aud_cntrl_st2; DRM_DEBUG_KMS("Enable audio codec on port %c, pipe %c, %u bytes ELD\n", port_name(port), pipe_name(pipe), drm_eld_size(eld)); |