[PATCH 23/23] drm: omapdrm: panel-dsi-cm: provide timings methods for omapdrm

Sebastian Reichel
2016-03-08T16:54:14Z

Provide omapdrm with methods to acquire timings
and check them later, so that it can properly
initialize the display.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
---
drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c | 38 +++++++++++++++++++++++++
1 file changed, 38 insertions(+)

diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
index 196fe8d18ff4..edd1298b3a71 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
@@ -1163,6 +1163,41 @@ static void dsicm_ulps_work(struct work_struct *work)
mutex_unlock(&ddata->lock);
}

+static void dsicm_get_timings(struct omap_dss_device *dssdev,
+ struct omap_video_timings *timings)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+
+ *timings = ddata->timings;
+}
+
+static int dsicm_check_timings(struct omap_dss_device *dssdev,
+ struct omap_video_timings *timings)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+ int ret = 0;
+
+ if (timings->x_res != ddata->timings.x_res)
+ ret = -EINVAL;
+ else if (timings->y_res != ddata->timings.y_res)
+ ret = -EINVAL;
+
+ /* pixelclock is modified by dsi, so not easily checkable */
+
+ /* vfp, vbp, hfp, hbp are (re-)configured automatically by dsi */
+
+ if (ret) {
+ dev_warn(dssdev->dev, "wrong resolution: %d x %d",
+ timings->x_res, timings->y_res);
+ dev_warn(dssdev->dev, "panel resolution: %d x %d",
+ ddata->timings.x_res, ddata->timings.y_res);
+ } else {
+ dev_dbg(dssdev->dev, "mode check: ok");
+ }
+
+ return ret;
+}
+
static struct omap_dss_driver dsicm_ops = {
.connect = dsicm_connect,
.disconnect = dsicm_disconnect,
@@ -1180,6 +1215,9 @@ static struct omap_dss_driver dsicm_ops = {
.get_te = dsicm_get_te,

.memory_read = dsicm_memory_read,
+
+ .get_timings = dsicm_get_timings,
+ .check_timings = dsicm_check_timings,
};

static int dsicm_probe_pdata(struct platform_device *pdev)
--
2.7.0