drm/i915: add GEN2_ prefix to the I{E, I, M, S}R registers
This discussion started because we use token pasting in the
GEN{2,3}_IRQ_INIT and GEN{2,3}_IRQ_RESET macros, so gen2-4 passes an
empty argument to those macros, making the code a little weird. The
original proposal was to just add a comment as the empty argument, but
Ville suggested we just add a prefix to the registers, and that indeed
sounds like a more elegant solution.
Now doing this is kinda against our rules for register naming since we
only add gens or platform names as register prefixes when the given
gen/platform changes a register that already existed before. On the
other hand, we have so many instances of IIR/IMR in comments that
adding a prefix would make the users of these register more easily
findable, in addition to make our token pasting macros actually
readable. So IMHO opening an exception here is worth it.
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190410235344.31199-4-paulo.r.zanoni@intel.com
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index c1c0f7a..b74824f 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2715,10 +2715,10 @@ enum i915_power_well_id {
#define VLV_GU_CTL0 _MMIO(VLV_DISPLAY_BASE + 0x2030)
#define VLV_GU_CTL1 _MMIO(VLV_DISPLAY_BASE + 0x2034)
#define SCPD0 _MMIO(0x209c) /* 915+ only */
-#define IER _MMIO(0x20a0)
-#define IIR _MMIO(0x20a4)
-#define IMR _MMIO(0x20a8)
-#define ISR _MMIO(0x20ac)
+#define GEN2_IER _MMIO(0x20a0)
+#define GEN2_IIR _MMIO(0x20a4)
+#define GEN2_IMR _MMIO(0x20a8)
+#define GEN2_ISR _MMIO(0x20ac)
#define VLV_GUNIT_CLOCK_GATE _MMIO(VLV_DISPLAY_BASE + 0x2060)
#define GINT_DIS (1 << 22)
#define GCFG_DIS (1 << 8)
