drm/fb: revert the i915 Actually configure untiled displays from master

This code moved in here in master, so revert it the same way.

This is the same revert as 9fa246256e09 ("Revert "drm/i915/fbdev:
Actually configure untiled displays"") in drm-fixes.

Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 4de4b9d59d49ccbdb5bfa3cc7921b9e86c71864c..226c0910ba9107d99d9e9b78bbdc0f1fbe483f0f 100644 (file)
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -2580,7 +2580,7 @@ static bool drm_fb_helper_firmware_config(struct drm_fb_helper *fb_helper,
 {
        struct drm_device *dev = fb_helper->dev;
        unsigned int count = min(fb_helper->connector_count, BITS_PER_LONG);
-       unsigned long conn_configured, conn_seq;
+       unsigned long conn_configured, conn_seq, mask;
        int i, j;
        bool *save_enabled;
        bool fallback = true, ret = true;
@@ -2598,9 +2598,10 @@ static bool drm_fb_helper_firmware_config(struct drm_fb_helper *fb_helper,
                drm_modeset_backoff(&ctx);
 
        memcpy(save_enabled, enabled, count);
-       conn_seq = GENMASK(count - 1, 0);
+       mask = GENMASK(count - 1, 0);
        conn_configured = 0;
 retry:
+       conn_seq = conn_configured;
        for (i = 0; i < count; i++) {
                struct drm_fb_helper_connector *fb_conn;
                struct drm_connector *connector;
@@ -2613,8 +2614,7 @@ retry:
                if (conn_configured & BIT(i))
                        continue;
 
-               /* First pass, only consider tiled connectors */
-               if (conn_seq == GENMASK(count - 1, 0) && !connector->has_tile)
+               if (conn_seq == 0 && !connector->has_tile)
                        continue;
 
                if (connector->status == connector_status_connected)
@@ -2715,10 +2715,8 @@ retry:
                conn_configured |= BIT(i);
        }
 
-       if (conn_configured != conn_seq) { /* repeat until no more are found */
-               conn_seq = conn_configured;
+       if ((conn_configured & mask) != mask && conn_configured != conn_seq)
                goto retry;
-       }
 
        /*
         * If the BIOS didn't enable everything it could, fall back to have the