From: José Roberto de Souza <jose.so...@intel.com>

Same as for_each_oldnew_intel_crtc_in_state() but iterates in reverse
order.

v2: Fix additional blank line
v3: Rebase

Cc: Rodrigo Vivi <rodrigo.v...@intel.com>
Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
Signed-off-by: José Roberto de Souza <jose.so...@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demar...@intel.com>
Reviewed-by: Mika Kahola <mika.kah...@intel.com>
Link: 
https://patchwork.freedesktop.org/patch/msgid/20190823082055.5992-12-lucas.demar...@intel.com
---
 drivers/gpu/drm/i915/display/intel_display.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display.h 
b/drivers/gpu/drm/i915/display/intel_display.h
index e57e6969051d..03321fb4a703 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -411,6 +411,15 @@ enum phy_fia {
             (__i)++) \
                for_each_if(crtc)
 
+#define for_each_oldnew_intel_crtc_in_state_reverse(__state, crtc, 
old_crtc_state, new_crtc_state, __i) \
+       for ((__i) = (__state)->base.dev->mode_config.num_crtc - 1; \
+            (__i) >= 0  && \
+            ((crtc) = to_intel_crtc((__state)->base.crtcs[__i].ptr), \
+             (old_crtc_state) = 
to_intel_crtc_state((__state)->base.crtcs[__i].old_state), \
+             (new_crtc_state) = 
to_intel_crtc_state((__state)->base.crtcs[__i].new_state), 1); \
+            (__i)--) \
+               for_each_if(crtc)
+
 void intel_link_compute_m_n(u16 bpp, int nlanes,
                            int pixel_clock, int link_clock,
                            struct intel_link_m_n *m_n,
-- 
2.21.0

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