1 files changed, 83 insertions, 5 deletions

diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index fe8697447f32..1fe4e1d344fd 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -32,6 +32,7 @@
 #include "drmP.h"
 #include "drm_crtc.h"
 #include "drm_crtc_helper.h"
+#include "drm_fb_helper.h"
 
 static void drm_mode_validate_flag(struct drm_connector *connector,
                                    int flags)
@@ -90,7 +91,15 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
         list_for_each_entry_safe(mode, t, &connector->modes, head)
                 mode->status = MODE_UNVERIFIED;
 
-        connector->status = connector->funcs->detect(connector);
+        if (connector->force) {
+                if (connector->force == DRM_FORCE_ON)
+                        connector->status = connector_status_connected;
+                else
+                        connector->status = connector_status_disconnected;
+                if (connector->funcs->force)
+                        connector->funcs->force(connector);
+        } else
+                connector->status = connector->funcs->detect(connector);
 
         if (connector->status == connector_status_disconnected) {
                 DRM_DEBUG_KMS("%s is disconnected\n",
@@ -267,6 +276,65 @@ static struct drm_display_mode *drm_has_preferred_mode(struct drm_connector *con
         return NULL;
 }
 
+static bool drm_has_cmdline_mode(struct drm_connector *connector)
+{
+        struct drm_fb_helper_connector *fb_help_conn = connector->fb_helper_private;
+        struct drm_fb_helper_cmdline_mode *cmdline_mode;
+
+        if (!fb_help_conn)
+                return false;
+
+        cmdline_mode = &fb_help_conn->cmdline_mode;
+        return cmdline_mode->specified;
+}
+
+static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_connector *connector, int width, int height)
+{
+        struct drm_fb_helper_connector *fb_help_conn = connector->fb_helper_private;
+        struct drm_fb_helper_cmdline_mode *cmdline_mode;
+        struct drm_display_mode *mode = NULL;
+
+        if (!fb_help_conn)
+                return mode;
+
+        cmdline_mode = &fb_help_conn->cmdline_mode;
+        if (cmdline_mode->specified == false)
+                return mode;
+
+        /* attempt to find a matching mode in the list of modes
+         *  we have gotten so far, if not add a CVT mode that conforms
+         */
+        if (cmdline_mode->rb || cmdline_mode->margins)
+                goto create_mode;
+
+        list_for_each_entry(mode, &connector->modes, head) {
+                /* check width/height */
+                if (mode->hdisplay != cmdline_mode->xres ||
+                    mode->vdisplay != cmdline_mode->yres)
+                        continue;
+
+                if (cmdline_mode->refresh_specified) {
+                        if (mode->vrefresh != cmdline_mode->refresh)
+                                continue;
+                }
+
+                if (cmdline_mode->interlace) {
+                        if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
+                                continue;
+                }
+                return mode;
+        }
+
+create_mode:
+        mode = drm_cvt_mode(connector->dev, cmdline_mode->xres,
+                            cmdline_mode->yres,
+                            cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
+                            cmdline_mode->rb, cmdline_mode->interlace,
+                            cmdline_mode->margins);
+        list_add(&mode->head, &connector->modes);
+        return mode;
+}
+
 static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
 {
         bool enable;
@@ -317,10 +385,16 @@ static bool drm_target_preferred(struct drm_device *dev,
                         continue;
                 }
 
-                DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
-                          connector->base.id);
+                DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
+                              connector->base.id);
 
-                modes[i] = drm_has_preferred_mode(connector, width, height);
+                /* got for command line mode first */
+                modes[i] = drm_pick_cmdline_mode(connector, width, height);
+                if (!modes[i]) {
+                        DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
+                                      connector->base.id);
+                        modes[i] = drm_has_preferred_mode(connector, width, height);
+                }
                 /* No preferred modes, pick one off the list */
                 if (!modes[i] && !list_empty(&connector->modes)) {
                         list_for_each_entry(modes[i], &connector->modes, head)
@@ -369,6 +443,8 @@ static int drm_pick_crtcs(struct drm_device *dev,
         my_score = 1;
         if (connector->status == connector_status_connected)
                 my_score++;
+        if (drm_has_cmdline_mode(connector))
+                my_score++;
         if (drm_has_preferred_mode(connector, width, height))
                 my_score++;
 
@@ -943,6 +1019,8 @@ bool drm_helper_initial_config(struct drm_device *dev)
 {
         int count = 0;
 
+        drm_fb_helper_parse_command_line(dev);
+
         count = drm_helper_probe_connector_modes(dev,
                                                  dev->mode_config.max_width,
                                                  dev->mode_config.max_height);
@@ -950,7 +1028,7 @@ bool drm_helper_initial_config(struct drm_device *dev)
         /*
          * we shouldn't end up with no modes here.
          */
-        WARN(!count, "Connected connector with 0 modes\n");
+        WARN(!count, "No connectors reported connected with modes\n");
 
         drm_setup_crtcs(dev);