[PATCH 5.19 167/207] drm/i915/display: Fix handling of enable_psr parameter

Greg Kroah-Hartman
2022-09-26T11:58:10Z

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

commit 5c57c099f442acab13129c9e15ad2a0c31151c98 upstream.

Commit 3cf050762534 ("drm/i915/bios: Split VBT data into per-panel vs.
global parts") cause PSR to be disabled when enable_psr has the
default value and there is at least one DP port that do not supports
PSR.

That was happening because intel_psr_init() is called for every DP
port and then enable_psr is globaly set to 0 based on the PSR support
of the DP port.

Here dropping the enable_psr overwritten and using the VBT PSR value
when enable_psr is set as default.

Fixes: 3cf050762534 ("drm/i915/bios: Split VBT data into per-panel vs. global parts")
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Jouni Högander <jouni.hogander@intel.com>
Cc: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220608203344.513082-1-jose.souza@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/i915/display/intel_psr.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)

--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -86,10 +86,13 @@

static bool psr_global_enabled(struct intel_dp *intel_dp)
{
+ struct intel_connector *connector = intel_dp->attached_connector;
struct drm_i915_private *i915 = dp_to_i915(intel_dp);

switch (intel_dp->psr.debug & I915_PSR_DEBUG_MODE_MASK) {
case I915_PSR_DEBUG_DEFAULT:
+ if (i915->params.enable_psr == -1)
+ return connector->panel.vbt.psr.enable;
return i915->params.enable_psr;
case I915_PSR_DEBUG_DISABLE:
return false;
@@ -2371,10 +2374,6 @@ void intel_psr_init(struct intel_dp *int

intel_dp->psr.source_support = true;

- if (dev_priv->params.enable_psr == -1)
- if (!connector->panel.vbt.psr.enable)
- dev_priv->params.enable_psr = 0;
-
/* Set link_standby x link_off defaults */
if (DISPLAY_VER(dev_priv) < 12)
/* For new platforms up to TGL let's respect VBT back again */