From: Yetunde Adebisi Date: Tue, 5 Apr 2016 14:10:51 +0000 (+0100) Subject: drm/i915: Read eDP Display control capability registers X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=86ee27b5aa7591506e4a706881ea8aaec02ccb50;p=linux-beck.git drm/i915: Read eDP Display control capability registers Add new edp_dpcd variable to intel_dp. Read and save eDP Display control capability registers to edp_dpcd. Signed-off-by: Yetunde Adebisi Signed-off-by: Jani Nikula Link: http://patchwork.freedesktop.org/patch/msgid/1459865452-9138-3-git-send-email-yetundex.adebisi@intel.com --- diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index a3fc49430c26..6bb0b2340e7c 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -3747,7 +3747,6 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp) struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); struct drm_device *dev = dig_port->base.base.dev; struct drm_i915_private *dev_priv = dev->dev_private; - uint8_t rev; if (intel_dp_dpcd_read_wake(&intel_dp->aux, 0x000, intel_dp->dpcd, sizeof(intel_dp->dpcd)) < 0) @@ -3804,6 +3803,15 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp) DRM_DEBUG_KMS("PSR2 %s on sink", dev_priv->psr.psr2_support ? "supported" : "not supported"); } + + /* Read the eDP Display control capabilities registers */ + memset(intel_dp->edp_dpcd, 0, sizeof(intel_dp->edp_dpcd)); + if ((intel_dp->dpcd[DP_EDP_CONFIGURATION_CAP] & DP_DPCD_DISPLAY_CONTROL_CAPABLE) && + (intel_dp_dpcd_read_wake(&intel_dp->aux, DP_EDP_DPCD_REV, + intel_dp->edp_dpcd, sizeof(intel_dp->edp_dpcd)) == + sizeof(intel_dp->edp_dpcd))) + DRM_DEBUG_KMS("EDP DPCD : %*ph\n", (int) sizeof(intel_dp->edp_dpcd), + intel_dp->edp_dpcd); } DRM_DEBUG_KMS("Display Port TPS3 support: source %s, sink %s\n", @@ -3811,10 +3819,7 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp) yesno(drm_dp_tps3_supported(intel_dp->dpcd))); /* Intermediate frequency support */ - if (is_edp(intel_dp) && - (intel_dp->dpcd[DP_EDP_CONFIGURATION_CAP] & DP_DPCD_DISPLAY_CONTROL_CAPABLE) && - (intel_dp_dpcd_read_wake(&intel_dp->aux, DP_EDP_DPCD_REV, &rev, 1) == 1) && - (rev >= 0x03)) { /* eDp v1.4 or higher */ + if (is_edp(intel_dp) && (intel_dp->edp_dpcd[0] >= 0x03)) { /* eDp v1.4 or higher */ __le16 sink_rates[DP_MAX_SUPPORTED_RATES]; int i; diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index b9f1304439e2..99db8bb0084b 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -810,6 +810,7 @@ struct intel_dp { uint8_t dpcd[DP_RECEIVER_CAP_SIZE]; uint8_t psr_dpcd[EDP_PSR_RECEIVER_CAP_SIZE]; uint8_t downstream_ports[DP_MAX_DOWNSTREAM_PORTS]; + uint8_t edp_dpcd[EDP_DISPLAY_CTL_CAP_SIZE]; /* sink rates as reported by DP_SUPPORTED_LINK_RATES */ uint8_t num_sink_rates; int sink_rates[DP_MAX_SUPPORTED_RATES];