drm_fb_helper: Preserve capability to use atomic kms

[sfrench/cifs-2.6.git] / drivers / gpu / drm / drm_fb_helper.c

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 08c4c926e65f58e1b28fabcb1bb30c3ac183f7b5..de82e201d6826d8ac0e422b22a2d0a93f8312d82 100644 (file)
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -146,7 +146,7 @@ static bool drm_fb_helper_connector_parse_command_line(struct drm_fb_helper_conn
                                cvt = 1;
                        break;
                case 'R':
-                       if (!cvt)
+                       if (cvt)
                                rb = 1;
                        break;
                case 'm':
@@ -241,6 +241,80 @@ static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper)
        return 0;
 }
 
+int drm_fb_helper_debug_enter(struct fb_info *info)
+{
+       struct drm_fb_helper *helper = info->par;
+       struct drm_crtc_helper_funcs *funcs;
+       int i;
+
+       if (list_empty(&kernel_fb_helper_list))
+               return false;
+
+       list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
+               for (i = 0; i < helper->crtc_count; i++) {
+                       struct drm_mode_set *mode_set =
+                               &helper->crtc_info[i].mode_set;
+
+                       if (!mode_set->crtc->enabled)
+                               continue;
+
+                       funcs = mode_set->crtc->helper_private;
+                       funcs->mode_set_base_atomic(mode_set->crtc,
+                                                   mode_set->fb,
+                                                   mode_set->x,
+                                                   mode_set->y);
+
+               }
+       }
+
+       return 0;
+}
+EXPORT_SYMBOL(drm_fb_helper_debug_enter);
+
+/* Find the real fb for a given fb helper CRTC */
+static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc)
+{
+       struct drm_device *dev = crtc->dev;
+       struct drm_crtc *c;
+
+       list_for_each_entry(c, &dev->mode_config.crtc_list, head) {
+               if (crtc->base.id == c->base.id)
+                       return c->fb;
+       }
+
+       return NULL;
+}
+
+int drm_fb_helper_debug_leave(struct fb_info *info)
+{
+       struct drm_fb_helper *helper = info->par;
+       struct drm_crtc *crtc;
+       struct drm_crtc_helper_funcs *funcs;
+       struct drm_framebuffer *fb;
+       int i;
+
+       for (i = 0; i < helper->crtc_count; i++) {
+               struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
+               crtc = mode_set->crtc;
+               funcs = crtc->helper_private;
+               fb = drm_mode_config_fb(crtc);
+
+               if (!crtc->enabled)
+                       continue;
+
+               if (!fb) {
+                       DRM_ERROR("no fb to restore??\n");
+                       continue;
+               }
+
+               funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x,
+                                           crtc->y);
+       }
+
+       return 0;
+}
+EXPORT_SYMBOL(drm_fb_helper_debug_leave);
+
 bool drm_fb_helper_force_kernel_mode(void)
 {
        int i = 0;
@@ -315,8 +389,9 @@ static void drm_fb_helper_on(struct fb_info *info)
        struct drm_device *dev = fb_helper->dev;
        struct drm_crtc *crtc;
        struct drm_crtc_helper_funcs *crtc_funcs;
+       struct drm_connector *connector;
        struct drm_encoder *encoder;
-       int i;
+       int i, j;
 
        /*
         * For each CRTC in this fb, turn the crtc on then,
@@ -332,7 +407,14 @@ static void drm_fb_helper_on(struct fb_info *info)
 
                crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
 
-
+               /* Walk the connectors & encoders on this fb turning them on */
+               for (j = 0; j < fb_helper->connector_count; j++) {
+                       connector = fb_helper->connector_info[j]->connector;
+                       connector->dpms = DRM_MODE_DPMS_ON;
+                       drm_connector_property_set_value(connector,
+                                                        dev->mode_config.dpms_property,
+                                                        DRM_MODE_DPMS_ON);
+               }
                /* Found a CRTC on this fb, now find encoders */
                list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
                        if (encoder->crtc == crtc) {
@@ -352,8 +434,9 @@ static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
        struct drm_device *dev = fb_helper->dev;
        struct drm_crtc *crtc;
        struct drm_crtc_helper_funcs *crtc_funcs;
+       struct drm_connector *connector;
        struct drm_encoder *encoder;
-       int i;
+       int i, j;
 
        /*
         * For each CRTC in this fb, find all associated encoders
@@ -367,6 +450,14 @@ static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
                if (!crtc->enabled)
                        continue;
 
+               /* Walk the connectors on this fb and mark them off */
+               for (j = 0; j < fb_helper->connector_count; j++) {
+                       connector = fb_helper->connector_info[j]->connector;
+                       connector->dpms = dpms_mode;
+                       drm_connector_property_set_value(connector,
+                                                        dev->mode_config.dpms_property,
+                                                        dpms_mode);
+               }
                /* Found a CRTC on this fb, now find encoders */
                list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
                        if (encoder->crtc == crtc) {
@@ -594,7 +685,7 @@ int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
        struct drm_framebuffer *fb = fb_helper->fb;
        int depth;
 
-       if (var->pixclock != 0)
+       if (var->pixclock != 0 || in_dbg_master())
                return -EINVAL;
 
        /* Need to resize the fb object !!! */
@@ -1024,11 +1115,18 @@ static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_conne
        }
 
 create_mode:
-       mode = drm_cvt_mode(fb_helper_conn->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);
+       if (cmdline_mode->cvt)
+               mode = drm_cvt_mode(fb_helper_conn->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);
+       else
+               mode = drm_gtf_mode(fb_helper_conn->connector->dev,
+                                   cmdline_mode->xres, cmdline_mode->yres,
+                                   cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
+                                   cmdline_mode->interlace,
+                                   cmdline_mode->margins);
        drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
        list_add(&mode->head, &fb_helper_conn->connector->modes);
        return mode;