The pipe config needs to be initialized before calling crtc_compute_clock
since this will update the new_config structure DPLL values. Initializing
the new_config structure after calling crtc_compute_clock can result in
incorrect timing values.
This regression was introduced in
commit 0dbdf89f27b17ae1eceed6782c2917f74cbb5d59
Author: Ander Conselvan de Oliveira <ander.conselvan.de.olive...@intel.com>
Date: Wed Oct 29 11:32:33 2014 +0200
drm/i915: Add infrastructure for choosing DPLLs before disabling crtcs
and
commit 00d958817dd3daaa452c221387ddaf23d1e4c06f
Author: Ander Conselvan de Oliveira
<ander.conselvan.de.olive...@intel.com>
Date: Wed Oct 29 11:32:36 2014 +0200
drm/i915: Covert remaining platforms to choose DPLLS before
disabling CRTCs
Signed-off-by: Bob Paauwe <bob.j.paa...@intel.com>
CC: Ander Conselvan de Oliveira <ander.conselvan.de.olive...@intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index ff071a7..53f3d3a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -10774,7 +10774,11 @@ static int __intel_set_mode(struct drm_crtc *crtc,
}
intel_dump_pipe_config(to_intel_crtc(crtc), pipe_config,
"[modeset]");
- to_intel_crtc(crtc)->new_config = pipe_config;
+
+ /* mode_set/enable/disable functions rely on a correct pipe
+ * config. */
+ to_intel_crtc(crtc)->config = *pipe_config;
+ to_intel_crtc(crtc)->new_config = &to_intel_crtc(crtc)->config;
}
/*
@@ -10820,10 +10824,6 @@ static int __intel_set_mode(struct drm_crtc *crtc,
*/
if (modeset_pipes) {
crtc->mode = *mode;
- /* mode_set/enable/disable functions rely on a correct pipe
- * config. */
- to_intel_crtc(crtc)->config = *pipe_config;
- to_intel_crtc(crtc)->new_config = &to_intel_crtc(crtc)->config;
/*
* Calculate and store various constants which
--
1.8.3.1
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