* [PATCH] drm/i915/dp: On link train failure on eDP, retry with max params first
@ 2019-04-04 0:38 Manasi Navare
2019-04-04 0:53 ` ✗ Fi.CI.BAT: failure for " Patchwork
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Manasi Navare @ 2019-04-04 0:38 UTC (permalink / raw)
To: intel-gfx; +Cc: Albert Astals Cid, Ralgor, Emanuele Panigati
Certain eDP panels fail to link train with optimized settings for
link rate and lane count and need the max link parameters to be used
for link training to pass.
So in on link training failure for eDP, retry the link training
with max link parameters first since this tends to fix link
failures on most eDP 1.4 panels
Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Albert Astals Cid <aacid@kde.org>
Cc: Emanuele Panigati <ilpanich@gmail.com>
Cc: Ralgor <ralgorfdb@compuspex.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109959
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
---
drivers/gpu/drm/i915/intel_dp.c | 36 ++++++++++++++++++++------------
drivers/gpu/drm/i915/intel_drv.h | 3 +++
2 files changed, 26 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 72c49070ed14..d65d1a9338d6 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -463,6 +463,14 @@ static bool intel_dp_can_link_train_fallback_for_edp(struct intel_dp *intel_dp,
return true;
}
+static bool intel_dp_uses_max_link_params(struct intel_dp*,
+ int link_rate,
+ u8 lane_count)
+{
+ return link_rate == intel_dp->max_link_rate &&
+ lane_count == intel_dp->max_link_lane_count;
+}
+
int intel_dp_get_link_train_fallback_values(struct intel_dp *intel_dp,
int link_rate, u8 lane_count)
{
@@ -471,24 +479,23 @@ int intel_dp_get_link_train_fallback_values(struct intel_dp *intel_dp,
index = intel_dp_rate_index(intel_dp->common_rates,
intel_dp->num_common_rates,
link_rate);
- if (index > 0) {
- if (intel_dp_is_edp(intel_dp) &&
- !intel_dp_can_link_train_fallback_for_edp(intel_dp,
- intel_dp->common_rates[index - 1],
- lane_count)) {
+
+ if (intel_dp_is_edp(intel_dp)) {
+ if (!intel_dp_uses_max_link_params) {
+ intel_dp->retry_with_max_link_params = true;
+ DRM_DEBUGS_KMS("Retrying Link training for eDP with max link parameters\n");
+ return 0;
+ } else if (!intel_dp_can_link_train_fallback_for_edp(intel_dp,
+ intel_dp->common_rates[index - 1],
+ lane_count)) {
DRM_DEBUG_KMS("Retrying Link training for eDP with same parameters\n");
return 0;
}
+ }
+ if (index > 0) {
intel_dp->max_link_rate = intel_dp->common_rates[index - 1];
intel_dp->max_link_lane_count = lane_count;
} else if (lane_count > 1) {
- if (intel_dp_is_edp(intel_dp) &&
- !intel_dp_can_link_train_fallback_for_edp(intel_dp,
- intel_dp_max_common_rate(intel_dp),
- lane_count >> 1)) {
- DRM_DEBUG_KMS("Retrying Link training for eDP with same parameters\n");
- return 0;
- }
intel_dp->max_link_rate = intel_dp_max_common_rate(intel_dp);
intel_dp->max_link_lane_count = lane_count >> 1;
} else {
@@ -2028,7 +2035,8 @@ intel_dp_compute_link_config(struct intel_encoder *encoder,
limits.min_bpp = 6 * 3;
limits.max_bpp = intel_dp_compute_bpp(intel_dp, pipe_config);
- if (intel_dp_is_edp(intel_dp) && intel_dp->edp_dpcd[0] < DP_EDP_14) {
+ if ((intel_dp_is_edp(intel_dp) && intel_dp->edp_dpcd[0] < DP_EDP_14) ||
+ intel_dp->retry_with_max_link_params) {
/*
* Use the maximum clock and number of lanes the eDP panel
* advertizes being capable of. The eDP 1.3 and earlier panels
@@ -5432,6 +5440,8 @@ intel_dp_detect(struct drm_connector *connector,
/* Initial max link rate */
intel_dp->max_link_rate = intel_dp_max_common_rate(intel_dp);
+ intel_dp->retry_with_max_link_params = false;
+
intel_dp->reset_link_params = false;
}
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index f8c7b291fdc3..c3cf702c1cba 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1327,6 +1327,9 @@ struct intel_dp {
/* Display stream compression testing */
bool force_dsc_en;
+
+ /* Some panels need max link params for link training */
+ bool retry_with_max_link_params;
};
enum lspcon_vendor {
--
2.19.1
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* ✗ Fi.CI.BAT: failure for drm/i915/dp: On link train failure on eDP, retry with max params first
2019-04-04 0:38 [PATCH] drm/i915/dp: On link train failure on eDP, retry with max params first Manasi Navare
@ 2019-04-04 0:53 ` Patchwork
2019-04-04 5:18 ` [PATCH] " kbuild test robot
2019-04-04 5:21 ` kbuild test robot
2 siblings, 0 replies; 4+ messages in thread
From: Patchwork @ 2019-04-04 0:53 UTC (permalink / raw)
To: Manasi Navare; +Cc: intel-gfx
== Series Details ==
Series: drm/i915/dp: On link train failure on eDP, retry with max params first
URL : https://patchwork.freedesktop.org/series/58975/
State : failure
== Summary ==
CALL scripts/checksyscalls.sh
CALL scripts/atomic/check-atomics.sh
DESCEND objtool
CHK include/generated/compile.h
CC [M] drivers/gpu/drm/i915/intel_dp.o
drivers/gpu/drm/i915/intel_dp.c: In function ‘intel_dp_uses_max_link_params’:
drivers/gpu/drm/i915/intel_dp.c:466:50: error: parameter name omitted
static bool intel_dp_uses_max_link_params(struct intel_dp*,
^~~~~~~~
drivers/gpu/drm/i915/intel_dp.c:470:22: error: ‘intel_dp’ undeclared (first use in this function)
return link_rate == intel_dp->max_link_rate &&
^~~~~~~~
drivers/gpu/drm/i915/intel_dp.c:470:22: note: each undeclared identifier is reported only once for each function it appears in
drivers/gpu/drm/i915/intel_dp.c: In function ‘intel_dp_get_link_train_fallback_values’:
drivers/gpu/drm/i915/intel_dp.c:484:7: error: the address of ‘intel_dp_uses_max_link_params’ will always evaluate as ‘true’ [-Werror=address]
if (!intel_dp_uses_max_link_params) {
^
drivers/gpu/drm/i915/intel_dp.c:486:4: error: implicit declaration of function ‘DRM_DEBUGS_KMS’; did you mean ‘DRM_DEBUG_KMS’? [-Werror=implicit-function-declaration]
DRM_DEBUGS_KMS("Retrying Link training for eDP with max link parameters\n");
^~~~~~~~~~~~~~
DRM_DEBUG_KMS
cc1: all warnings being treated as errors
scripts/Makefile.build:275: recipe for target 'drivers/gpu/drm/i915/intel_dp.o' failed
make[4]: *** [drivers/gpu/drm/i915/intel_dp.o] Error 1
scripts/Makefile.build:486: recipe for target 'drivers/gpu/drm/i915' failed
make[3]: *** [drivers/gpu/drm/i915] Error 2
scripts/Makefile.build:486: recipe for target 'drivers/gpu/drm' failed
make[2]: *** [drivers/gpu/drm] Error 2
scripts/Makefile.build:486: recipe for target 'drivers/gpu' failed
make[1]: *** [drivers/gpu] Error 2
Makefile:1051: recipe for target 'drivers' failed
make: *** [drivers] Error 2
_______________________________________________
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https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] drm/i915/dp: On link train failure on eDP, retry with max params first
2019-04-04 0:38 [PATCH] drm/i915/dp: On link train failure on eDP, retry with max params first Manasi Navare
2019-04-04 0:53 ` ✗ Fi.CI.BAT: failure for " Patchwork
@ 2019-04-04 5:18 ` kbuild test robot
2019-04-04 5:21 ` kbuild test robot
2 siblings, 0 replies; 4+ messages in thread
From: kbuild test robot @ 2019-04-04 5:18 UTC (permalink / raw)
To: Manasi Navare
Cc: Albert Astals Cid, intel-gfx, Ralgor, kbuild-all, Emanuele Panigati
[-- Attachment #1: Type: text/plain, Size: 3725 bytes --]
Hi Manasi,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on drm-intel/for-linux-next]
[also build test ERROR on v5.1-rc3 next-20190403]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Manasi-Navare/drm-i915-dp-On-link-train-failure-on-eDP-retry-with-max-params-first/20190404-115622
base: git://anongit.freedesktop.org/drm-intel for-linux-next
config: x86_64-randconfig-x013-201913 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
All error/warnings (new ones prefixed by >>):
drivers/gpu//drm/i915/intel_dp.c: In function 'intel_dp_uses_max_link_params':
>> drivers/gpu//drm/i915/intel_dp.c:466:50: error: parameter name omitted
static bool intel_dp_uses_max_link_params(struct intel_dp*,
^~~~~~~~
>> drivers/gpu//drm/i915/intel_dp.c:470:22: error: 'intel_dp' undeclared (first use in this function)
return link_rate == intel_dp->max_link_rate &&
^~~~~~~~
drivers/gpu//drm/i915/intel_dp.c:470:22: note: each undeclared identifier is reported only once for each function it appears in
drivers/gpu//drm/i915/intel_dp.c: In function 'intel_dp_get_link_train_fallback_values':
>> drivers/gpu//drm/i915/intel_dp.c:484:7: warning: the address of 'intel_dp_uses_max_link_params' will always evaluate as 'true' [-Waddress]
if (!intel_dp_uses_max_link_params) {
^
>> drivers/gpu//drm/i915/intel_dp.c:486:4: error: implicit declaration of function 'DRM_DEBUGS_KMS'; did you mean 'DRM_DEBUG_KMS'? [-Werror=implicit-function-declaration]
DRM_DEBUGS_KMS("Retrying Link training for eDP with max link parameters\n");
^~~~~~~~~~~~~~
DRM_DEBUG_KMS
cc1: some warnings being treated as errors
vim +/intel_dp +470 drivers/gpu//drm/i915/intel_dp.c
465
> 466 static bool intel_dp_uses_max_link_params(struct intel_dp*,
467 int link_rate,
468 u8 lane_count)
469 {
> 470 return link_rate == intel_dp->max_link_rate &&
471 lane_count == intel_dp->max_link_lane_count;
472 }
473
474 int intel_dp_get_link_train_fallback_values(struct intel_dp *intel_dp,
475 int link_rate, u8 lane_count)
476 {
477 int index;
478
479 index = intel_dp_rate_index(intel_dp->common_rates,
480 intel_dp->num_common_rates,
481 link_rate);
482
483 if (intel_dp_is_edp(intel_dp)) {
> 484 if (!intel_dp_uses_max_link_params) {
485 intel_dp->retry_with_max_link_params = true;
> 486 DRM_DEBUGS_KMS("Retrying Link training for eDP with max link parameters\n");
487 return 0;
488 } else if (!intel_dp_can_link_train_fallback_for_edp(intel_dp,
489 intel_dp->common_rates[index - 1],
490 lane_count)) {
491 DRM_DEBUG_KMS("Retrying Link training for eDP with same parameters\n");
492 return 0;
493 }
494 }
495 if (index > 0) {
496 intel_dp->max_link_rate = intel_dp->common_rates[index - 1];
497 intel_dp->max_link_lane_count = lane_count;
498 } else if (lane_count > 1) {
499 intel_dp->max_link_rate = intel_dp_max_common_rate(intel_dp);
500 intel_dp->max_link_lane_count = lane_count >> 1;
501 } else {
502 DRM_ERROR("Link Training Unsuccessful\n");
503 return -1;
504 }
505
506 return 0;
507 }
508
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
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_______________________________________________
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https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] drm/i915/dp: On link train failure on eDP, retry with max params first
2019-04-04 0:38 [PATCH] drm/i915/dp: On link train failure on eDP, retry with max params first Manasi Navare
2019-04-04 0:53 ` ✗ Fi.CI.BAT: failure for " Patchwork
2019-04-04 5:18 ` [PATCH] " kbuild test robot
@ 2019-04-04 5:21 ` kbuild test robot
2 siblings, 0 replies; 4+ messages in thread
From: kbuild test robot @ 2019-04-04 5:21 UTC (permalink / raw)
To: Manasi Navare
Cc: Albert Astals Cid, intel-gfx, Ralgor, kbuild-all, Emanuele Panigati
[-- Attachment #1: Type: text/plain, Size: 3697 bytes --]
Hi Manasi,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on drm-intel/for-linux-next]
[also build test ERROR on v5.1-rc3 next-20190403]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Manasi-Navare/drm-i915-dp-On-link-train-failure-on-eDP-retry-with-max-params-first/20190404-115622
base: git://anongit.freedesktop.org/drm-intel for-linux-next
config: i386-randconfig-x006-201913 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All errors (new ones prefixed by >>):
drivers/gpu/drm/i915/intel_dp.c: In function 'intel_dp_uses_max_link_params':
drivers/gpu/drm/i915/intel_dp.c:466:50: error: parameter name omitted
static bool intel_dp_uses_max_link_params(struct intel_dp*,
^~~~~~~~
drivers/gpu/drm/i915/intel_dp.c:470:22: error: 'intel_dp' undeclared (first use in this function)
return link_rate == intel_dp->max_link_rate &&
^~~~~~~~
drivers/gpu/drm/i915/intel_dp.c:470:22: note: each undeclared identifier is reported only once for each function it appears in
drivers/gpu/drm/i915/intel_dp.c: In function 'intel_dp_get_link_train_fallback_values':
>> drivers/gpu/drm/i915/intel_dp.c:484:7: error: the address of 'intel_dp_uses_max_link_params' will always evaluate as 'true' [-Werror=address]
if (!intel_dp_uses_max_link_params) {
^
drivers/gpu/drm/i915/intel_dp.c:486:4: error: implicit declaration of function 'DRM_DEBUGS_KMS'; did you mean 'DRM_DEBUG_KMS'? [-Werror=implicit-function-declaration]
DRM_DEBUGS_KMS("Retrying Link training for eDP with max link parameters\n");
^~~~~~~~~~~~~~
DRM_DEBUG_KMS
cc1: all warnings being treated as errors
vim +484 drivers/gpu/drm/i915/intel_dp.c
465
> 466 static bool intel_dp_uses_max_link_params(struct intel_dp*,
467 int link_rate,
468 u8 lane_count)
469 {
470 return link_rate == intel_dp->max_link_rate &&
471 lane_count == intel_dp->max_link_lane_count;
472 }
473
474 int intel_dp_get_link_train_fallback_values(struct intel_dp *intel_dp,
475 int link_rate, u8 lane_count)
476 {
477 int index;
478
479 index = intel_dp_rate_index(intel_dp->common_rates,
480 intel_dp->num_common_rates,
481 link_rate);
482
483 if (intel_dp_is_edp(intel_dp)) {
> 484 if (!intel_dp_uses_max_link_params) {
485 intel_dp->retry_with_max_link_params = true;
486 DRM_DEBUGS_KMS("Retrying Link training for eDP with max link parameters\n");
487 return 0;
488 } else if (!intel_dp_can_link_train_fallback_for_edp(intel_dp,
489 intel_dp->common_rates[index - 1],
490 lane_count)) {
491 DRM_DEBUG_KMS("Retrying Link training for eDP with same parameters\n");
492 return 0;
493 }
494 }
495 if (index > 0) {
496 intel_dp->max_link_rate = intel_dp->common_rates[index - 1];
497 intel_dp->max_link_lane_count = lane_count;
498 } else if (lane_count > 1) {
499 intel_dp->max_link_rate = intel_dp_max_common_rate(intel_dp);
500 intel_dp->max_link_lane_count = lane_count >> 1;
501 } else {
502 DRM_ERROR("Link Training Unsuccessful\n");
503 return -1;
504 }
505
506 return 0;
507 }
508
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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_______________________________________________
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https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2019-04-04 5:21 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-04-04 0:38 [PATCH] drm/i915/dp: On link train failure on eDP, retry with max params first Manasi Navare
2019-04-04 0:53 ` ✗ Fi.CI.BAT: failure for " Patchwork
2019-04-04 5:18 ` [PATCH] " kbuild test robot
2019-04-04 5:21 ` kbuild test robot
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