1 files changed, 168 insertions, 0 deletions

diff --git a/drivers/gpu/drm/omapdrm/omap_encoder.c b/drivers/gpu/drm/omapdrm/omap_encoder.c
new file mode 100644
index 000000000000..21d126d0317e
--- /dev/null
+++ b/drivers/gpu/drm/omapdrm/omap_encoder.c
@@ -0,0 +1,168 @@
+/*
+ * drivers/gpu/drm/omapdrm/omap_encoder.c
+ *
+ * Copyright (C) 2011 Texas Instruments
+ * Author: Rob Clark <rob@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "omap_drv.h"
+
+#include "drm_crtc.h"
+#include "drm_crtc_helper.h"
+
+#include <linux/list.h>
+
+
+/*
+ * encoder funcs
+ */
+
+#define to_omap_encoder(x) container_of(x, struct omap_encoder, base)
+
+/* The encoder and connector both map to same dssdev.. the encoder
+ * handles the 'active' parts, ie. anything the modifies the state
+ * of the hw, and the connector handles the 'read-only' parts, like
+ * detecting connection and reading edid.
+ */
+struct omap_encoder {
+        struct drm_encoder base;
+        struct omap_dss_device *dssdev;
+};
+
+static void omap_encoder_destroy(struct drm_encoder *encoder)
+{
+        struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
+        drm_encoder_cleanup(encoder);
+        kfree(omap_encoder);
+}
+
+static const struct drm_encoder_funcs omap_encoder_funcs = {
+        .destroy = omap_encoder_destroy,
+};
+
+/*
+ * The CRTC drm_crtc_helper_set_mode() doesn't really give us the right
+ * order.. the easiest way to work around this for now is to make all
+ * the encoder-helper's no-op's and have the omap_crtc code take care
+ * of the sequencing and call us in the right points.
+ *
+ * Eventually to handle connecting CRTCs to different encoders properly,
+ * either the CRTC helpers need to change or we need to replace
+ * drm_crtc_helper_set_mode(), but lets wait until atomic-modeset for
+ * that.
+ */
+
+static void omap_encoder_dpms(struct drm_encoder *encoder, int mode)
+{
+}
+
+static bool omap_encoder_mode_fixup(struct drm_encoder *encoder,
+                                  const struct drm_display_mode *mode,
+                                  struct drm_display_mode *adjusted_mode)
+{
+        return true;
+}
+
+static void omap_encoder_mode_set(struct drm_encoder *encoder,
+                                struct drm_display_mode *mode,
+                                struct drm_display_mode *adjusted_mode)
+{
+}
+
+static void omap_encoder_prepare(struct drm_encoder *encoder)
+{
+}
+
+static void omap_encoder_commit(struct drm_encoder *encoder)
+{
+}
+
+static const struct drm_encoder_helper_funcs omap_encoder_helper_funcs = {
+        .dpms = omap_encoder_dpms,
+        .mode_fixup = omap_encoder_mode_fixup,
+        .mode_set = omap_encoder_mode_set,
+        .prepare = omap_encoder_prepare,
+        .commit = omap_encoder_commit,
+};
+
+/*
+ * Instead of relying on the helpers for modeset, the omap_crtc code
+ * calls these functions in the proper sequence.
+ */
+
+int omap_encoder_set_enabled(struct drm_encoder *encoder, bool enabled)
+{
+        struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
+        struct omap_dss_device *dssdev = omap_encoder->dssdev;
+        struct omap_dss_driver *dssdrv = dssdev->driver;
+
+        if (enabled) {
+                return dssdrv->enable(dssdev);
+        } else {
+                dssdrv->disable(dssdev);
+                return 0;
+        }
+}
+
+int omap_encoder_update(struct drm_encoder *encoder,
+                struct omap_overlay_manager *mgr,
+                struct omap_video_timings *timings)
+{
+        struct drm_device *dev = encoder->dev;
+        struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
+        struct omap_dss_device *dssdev = omap_encoder->dssdev;
+        struct omap_dss_driver *dssdrv = dssdev->driver;
+        int ret;
+
+        dssdev->output->manager = mgr;
+
+        ret = dssdrv->check_timings(dssdev, timings);
+        if (ret) {
+                dev_err(dev->dev, "could not set timings: %d\n", ret);
+                return ret;
+        }
+
+        dssdrv->set_timings(dssdev, timings);
+
+        return 0;
+}
+
+/* initialize encoder */
+struct drm_encoder *omap_encoder_init(struct drm_device *dev,
+                struct omap_dss_device *dssdev)
+{
+        struct drm_encoder *encoder = NULL;
+        struct omap_encoder *omap_encoder;
+
+        omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL);
+        if (!omap_encoder)
+                goto fail;
+
+        omap_encoder->dssdev = dssdev;
+
+        encoder = &omap_encoder->base;
+
+        drm_encoder_init(dev, encoder, &omap_encoder_funcs,
+                         DRM_MODE_ENCODER_TMDS);
+        drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs);
+
+        return encoder;
+
+fail:
+        if (encoder)
+                omap_encoder_destroy(encoder);
+
+        return NULL;
+}