drm/omap: Add PM capabilities

[deliverable/linux.git] / drivers / staging / omapdrm / omap_dmm_tiler.c

diff --git a/drivers/staging/omapdrm/omap_dmm_tiler.c b/drivers/staging/omapdrm/omap_dmm_tiler.c
index 59bf43899fc09d20ac5c01a0c1894f4b166bc189..c42c5e500e02ba11a58a5e0abcab4877055f7d06 100644 (file)
--- a/drivers/staging/omapdrm/omap_dmm_tiler.c
+++ b/drivers/staging/omapdrm/omap_dmm_tiler.c
@@ -903,12 +903,46 @@ error:
 }
 #endif
 
+#ifdef CONFIG_PM
+static int omap_dmm_resume(struct device *dev)
+{
+       struct tcm_area area;
+       int i;
+
+       if (!omap_dmm)
+               return -ENODEV;
+
+       area = (struct tcm_area) {
+               .is2d = true,
+               .tcm = NULL,
+               .p1.x = omap_dmm->container_width - 1,
+               .p1.y = omap_dmm->container_height - 1,
+       };
+
+       /* initialize all LUTs to dummy page entries */
+       for (i = 0; i < omap_dmm->num_lut; i++) {
+               area.tcm = omap_dmm->tcm[i];
+               if (fill(&area, NULL, 0, 0, true))
+                       dev_err(dev, "refill failed");
+       }
+
+       return 0;
+}
+
+static const struct dev_pm_ops omap_dmm_pm_ops = {
+       .resume = omap_dmm_resume,
+};
+#endif
+
 struct platform_driver omap_dmm_driver = {
        .probe = omap_dmm_probe,
        .remove = omap_dmm_remove,
        .driver = {
                .owner = THIS_MODULE,
                .name = DMM_DRIVER_NAME,
+#ifdef CONFIG_PM
+               .pm = &omap_dmm_pm_ops,
+#endif
        },
 };