From 908335722a01ded6e2f7ee93bc6a196ee824b5a4 Mon Sep 17 00:00:00 2001
From: Manasi Navare <manasi.d.navare@intel.com>
Date: Thu, 3 Mar 2022 15:32:22 -0800
Subject: drm/i915/display/vrr: Reset VRR capable property on a long hpd
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Git-commit: 9df1e3ff60241ce3fb26db75933970dd1b871213
Patch-mainline: v5.18-rc4
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
With some VRR panels, user can turn VRR ON/OFF on the fly from the panel settings.
When VRR is turned OFF ,sends a long HPD to the driver clearing the Ignore MSA bit
in the DPCD. Currently the driver parses that onevery HPD but fails to reset
the corresponding VRR Capable Connector property.
Hence the userspace still sees this as VRR Capable panel which is incorrect.
Fix this by explicitly resetting the connector property.
v2: Reset vrr capable if status == connector_disconnected
v3: Use i915 and use bool vrr_capable (Jani Nikula)
v4: Move vrr_capable to after update modes call (Jani N)
Remove the redundant comment (Jan N)
v5: Fixes the regression on older platforms by resetting the VRR
only if HAS_VRR
v6: Remove the checks from driver, add in drm core before
setting VRR prop (Ville)
v7: Move VRR set/reset to set/unset_edid (Ville)
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Ville Syrj채l채 <ville.syrjala@linux.intel.com>
Fixes: 9bc34b4d0f3c ("drm/i915/display/vrr: Reset VRR capable property on a long hpd")
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Ville Syrj채l채 <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220303233222.4698-1-manasi.d.navare@intel.com
(cherry picked from commit d999ad1079f574be06a8f1701cd24a5dc0ada48c)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/display/intel_dp.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index d667657e3606..5059bb571487 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -29,6 +29,7 @@
#include <linux/i2c.h>
#include <linux/notifier.h>
#include <linux/slab.h>
+#include <linux/string_helpers.h>
#include <linux/timekeeping.h>
#include <linux/types.h>
@@ -4383,13 +4384,20 @@ intel_dp_update_420(struct intel_dp *intel_dp)
static void
intel_dp_set_edid(struct intel_dp *intel_dp)
{
+ struct drm_i915_private *i915 = dp_to_i915(intel_dp);
struct intel_connector *connector = intel_dp->attached_connector;
struct edid *edid;
+ bool vrr_capable;
intel_dp_unset_edid(intel_dp);
edid = intel_dp_get_edid(intel_dp);
connector->detect_edid = edid;
+ vrr_capable = intel_vrr_is_capable(&connector->base);
+ drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] VRR capable: %s\n",
+ connector->base.base.id, connector->base.name, str_yes_no(vrr_capable));
+ drm_connector_set_vrr_capable_property(&connector->base, vrr_capable);
+
intel_dp_update_dfp(intel_dp, edid);
intel_dp_update_420(intel_dp);
@@ -4422,6 +4430,9 @@ intel_dp_unset_edid(struct intel_dp *intel_dp)
intel_dp->dfp.ycbcr_444_to_420 = false;
connector->base.ycbcr_420_allowed = false;
+
+ drm_connector_set_vrr_capable_property(&connector->base,
+ false);
}
static int
@@ -4572,14 +4583,9 @@ static int intel_dp_get_modes(struct drm_connector *connector)
int num_modes = 0;
edid = intel_connector->detect_edid;
- if (edid) {
+ if (edid)
num_modes = intel_connector_update_modes(connector, edid);
- if (intel_vrr_is_capable(connector))
- drm_connector_set_vrr_capable_property(connector,
- true);
- }
-
/* Also add fixed mode, which may or may not be present in EDID */
if (intel_dp_is_edp(intel_attached_dp(intel_connector)) &&
intel_connector->panel.fixed_mode) {
--
2.38.1