From: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Date: Fri, 11 May 2018 12:51:43 -0700
Subject: drm/i915/psr: Avoid unnecessary DPCD read of DP_PSR_CAPS
Git-commit: 1e8b251ebcbbfc6bfa826bca4d91a8e1bcad2e5f
Patch-mainline: v4.19-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
intel_dp->psr_dpcd already has the required values.
Cc: Jose Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Tarun Vyas <tarun.vyas@intel.com>
Reviewed-by: Vathsala Nagaraju <vathsala.nagaraju@intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180511195145.3829-4-dhinakaran.pandiyan@intel.com
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/i915/intel_psr.c | 11 +----------
1 file changed, 1 insertion(+), 10 deletions(-)
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -197,15 +197,6 @@ void intel_psr_irq_handler(struct drm_i9
}
}
-static bool intel_dp_get_y_coord_required(struct intel_dp *intel_dp)
-{
- uint8_t psr_caps = 0;
-
- if (drm_dp_dpcd_readb(&intel_dp->aux, DP_PSR_CAPS, &psr_caps) != 1)
- return false;
- return psr_caps & DP_PSR2_SU_Y_COORDINATE_REQUIRED;
-}
-
static bool intel_dp_get_colorimetry_status(struct intel_dp *intel_dp)
{
uint8_t dprx = 0;
@@ -271,7 +262,7 @@ void intel_psr_init_dpcd(struct intel_dp
* GTC first.
*/
dev_priv->psr.sink_psr2_support =
- intel_dp_get_y_coord_required(intel_dp);
+ intel_dp->psr_dpcd[1] & DP_PSR2_SU_Y_COORDINATE_REQUIRED;
DRM_DEBUG_KMS("PSR2 %ssupported\n",
dev_priv->psr.sink_psr2_support ? "" : "not ");