6 files changed, 41 insertions, 10 deletions

diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c
index 645b84b3d203..7ad43c6b1db7 100644
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -613,6 +613,18 @@ static bool radeon_dp_get_link_status(struct radeon_connector *radeon_connector,
         return true;
 }
 
+bool radeon_dp_needs_link_train(struct radeon_connector *radeon_connector)
+{
+        u8 link_status[DP_LINK_STATUS_SIZE];
+        struct radeon_connector_atom_dig *dig = radeon_connector->con_priv;
+
+        if (!radeon_dp_get_link_status(radeon_connector, link_status))
+                return false;
+        if (dp_channel_eq_ok(link_status, dig->dp_lane_count))
+                return false;
+        return true;
+}
+
 struct radeon_dp_link_train_info {
         struct radeon_device *rdev;
         struct drm_encoder *encoder;
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 14dce9f22172..fb5fa0898868 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -743,7 +743,7 @@ static void evergreen_program_watermarks(struct radeon_device *rdev,
                     !evergreen_average_bandwidth_vs_available_bandwidth(&wm) ||
                     !evergreen_check_latency_hiding(&wm) ||
                     (rdev->disp_priority == 2)) {
-                        DRM_INFO("force priority to high\n");
+                        DRM_DEBUG_KMS("force priority to high\n");
                         priority_a_cnt |= PRIORITY_ALWAYS_ON;
                         priority_b_cnt |= PRIORITY_ALWAYS_ON;
                 }
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 6d6b5f16bc09..7f65940f918f 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -60,18 +60,20 @@ void radeon_connector_hotplug(struct drm_connector *connector)
 
         radeon_hpd_set_polarity(rdev, radeon_connector->hpd.hpd);
 
-        /* powering up/down the eDP panel generates hpd events which
-         * can interfere with modesetting.
-         */
-        if (connector->connector_type == DRM_MODE_CONNECTOR_eDP)
+        /* if the connector is already off, don't turn it back on */
+        if (connector->dpms != DRM_MODE_DPMS_ON)
                 return;
 
-        /* pre-r600 did not always have the hpd pins mapped accurately to connectors */
-        if (rdev->family >= CHIP_R600) {
-                if (radeon_hpd_sense(rdev, radeon_connector->hpd.hpd))
+        /* just deal with DP (not eDP) here. */
+        if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
+                int saved_dpms = connector->dpms;
+
+                if (radeon_hpd_sense(rdev, radeon_connector->hpd.hpd) &&
+                    radeon_dp_needs_link_train(radeon_connector))
                         drm_helper_connector_dpms(connector, DRM_MODE_DPMS_ON);
                 else
                         drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
+                connector->dpms = saved_dpms;
         }
 }
 
@@ -474,11 +476,19 @@ static void radeon_fixup_lvds_native_mode(struct drm_encoder *encoder,
 {
         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
         struct drm_display_mode *native_mode = &radeon_encoder->native_mode;
+        struct drm_display_mode *t, *mode;
+
+        /* If the EDID preferred mode doesn't match the native mode, use it */
+        list_for_each_entry_safe(mode, t, &connector->probed_modes, head) {
+                if (mode->type & DRM_MODE_TYPE_PREFERRED) {
+                        if (mode->hdisplay != native_mode->hdisplay ||
+                            mode->vdisplay != native_mode->vdisplay)
+                                memcpy(native_mode, mode, sizeof(*mode));
+                }
+        }
 
         /* Try to get native mode details from EDID if necessary */
         if (!native_mode->clock) {
-                struct drm_display_mode *t, *mode;
-
                 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) {
                         if (mode->hdisplay == native_mode->hdisplay &&
                             mode->vdisplay == native_mode->vdisplay) {
@@ -489,6 +499,7 @@ static void radeon_fixup_lvds_native_mode(struct drm_encoder *encoder,
                         }
                 }
         }
+
         if (!native_mode->clock) {
                 DRM_DEBUG_KMS("No LVDS native mode details, disabling RMX\n");
                 radeon_encoder->rmx_type = RMX_OFF;
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 440e6ecccc40..a3b011b49465 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -32,6 +32,7 @@
 #include <drm/radeon_drm.h>
 #include <linux/vgaarb.h>
 #include <linux/vga_switcheroo.h>
+#include <linux/efi.h>
 #include "radeon_reg.h"
 #include "radeon.h"
 #include "atom.h"
@@ -348,6 +349,9 @@ bool radeon_card_posted(struct radeon_device *rdev)
 {
         uint32_t reg;
 
+        if (efi_enabled && rdev->pdev->subsystem_vendor == PCI_VENDOR_ID_APPLE)
+                return false;
+
         /* first check CRTCs */
         if (ASIC_IS_DCE41(rdev)) {
                 reg = RREG32(EVERGREEN_CRTC_CONTROL + EVERGREEN_CRTC0_REGISTER_OFFSET) |
diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c
index b293487e5aa3..319d85d7e759 100644
--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -2323,6 +2323,9 @@ radeon_add_atom_encoder(struct drm_device *dev,
         default:
                 encoder->possible_crtcs = 0x3;
                 break;
+        case 4:
+                encoder->possible_crtcs = 0xf;
+                break;
         case 6:
                 encoder->possible_crtcs = 0x3f;
                 break;
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index d09031c03e26..68820f5f6303 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -479,6 +479,7 @@ extern void radeon_dp_set_link_config(struct drm_connector *connector,
                                       struct drm_display_mode *mode);
 extern void radeon_dp_link_train(struct drm_encoder *encoder,
                                  struct drm_connector *connector);
+extern bool radeon_dp_needs_link_train(struct radeon_connector *radeon_connector);
 extern u8 radeon_dp_getsinktype(struct radeon_connector *radeon_connector);
 extern bool radeon_dp_getdpcd(struct radeon_connector *radeon_connector);
 extern void atombios_dig_encoder_setup(struct drm_encoder *encoder, int action, int panel_mode);