[PATCH 03/15] drm/tegra: remove dependency on DRM simple helpers

[Diogo Silva]

The simple KMS helpers are deprecated because they only add an
intermediate layer between drivers and atomic modesetting.

Open-code drm_simple_encoder_init() by calling drm_encoder_init()
directly and providing driver-local drm_encoder_funcs.
Also check the return value from drm_encoder_init() to avoid silent
failures.

Signed-off-by: Diogo Silva <diogompaissilva at gmail.com>
---
 drivers/gpu/drm/tegra/dsi.c | 17 ++++++++++++++---
 drivers/gpu/drm/tegra/rgb.c | 14 ++++++++++++--
 2 files changed, 26 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c
index e7fdd8c7ac12..840e118716b2 100644
--- a/drivers/gpu/drm/tegra/dsi.c
+++ b/drivers/gpu/drm/tegra/dsi.c
@@ -20,11 +20,11 @@
 
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_debugfs.h>
+#include <drm/drm_encoder.h>
 #include <drm/drm_file.h>
 #include <drm/drm_mipi_dsi.h>
 #include <drm/drm_panel.h>
 #include <drm/drm_print.h>
-#include <drm/drm_simple_kms_helper.h>
 
 #include "dc.h"
 #include "drm.h"
@@ -1055,6 +1055,10 @@ tegra_dsi_encoder_atomic_check(struct drm_encoder *encoder,
 	return err;
 }
 
+static const struct drm_encoder_funcs tegra_dsi_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
+};
+
 static const struct drm_encoder_helper_funcs tegra_dsi_encoder_helper_funcs = {
 	.disable = tegra_dsi_encoder_disable,
 	.enable = tegra_dsi_encoder_enable,
@@ -1078,8 +1082,15 @@ static int tegra_dsi_init(struct host1x_client *client)
 					 &tegra_dsi_connector_helper_funcs);
 		dsi->output.connector.dpms = DRM_MODE_DPMS_OFF;
 
-		drm_simple_encoder_init(drm, &dsi->output.encoder,
-					DRM_MODE_ENCODER_DSI);
+		err = drm_encoder_init(drm, &dsi->output.encoder,
+				       &tegra_dsi_encoder_funcs,
+				       DRM_MODE_ENCODER_DSI, NULL);
+		if (err) {
+			dev_err(dsi->dev, "failed to initialize encoder: %d\n",
+				err);
+			return err;
+		}
+
 		drm_encoder_helper_add(&dsi->output.encoder,
 				       &tegra_dsi_encoder_helper_funcs);
 
diff --git a/drivers/gpu/drm/tegra/rgb.c b/drivers/gpu/drm/tegra/rgb.c
index e67fbb2362e6..337925c30d67 100644
--- a/drivers/gpu/drm/tegra/rgb.c
+++ b/drivers/gpu/drm/tegra/rgb.c
@@ -9,7 +9,7 @@
 
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_bridge_connector.h>
-#include <drm/drm_simple_kms_helper.h>
+#include <drm/drm_encoder.h>
 
 #include "drm.h"
 #include "dc.h"
@@ -194,6 +194,10 @@ tegra_rgb_encoder_atomic_check(struct drm_encoder *encoder,
 	return err;
 }
 
+static const struct drm_encoder_funcs tegra_rgb_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
+};
+
 static const struct drm_encoder_helper_funcs tegra_rgb_encoder_helper_funcs = {
 	.disable = tegra_rgb_encoder_disable,
 	.enable = tegra_rgb_encoder_enable,
@@ -305,7 +309,13 @@ int tegra_dc_rgb_init(struct drm_device *drm, struct tegra_dc *dc)
 	if (!dc->rgb)
 		return -ENODEV;
 
-	drm_simple_encoder_init(drm, &output->encoder, DRM_MODE_ENCODER_LVDS);
+	err = drm_encoder_init(drm, &output->encoder, &tegra_rgb_encoder_funcs,
+			       DRM_MODE_ENCODER_LVDS, NULL);
+	if (err) {
+		dev_err(output->dev, "failed to initialize encoder: %d\n", err);
+		return err;
+	}
+
 	drm_encoder_helper_add(&output->encoder,
 			       &tegra_rgb_encoder_helper_funcs);
 

-- 
2.54.0