Update Linux to v5.10.109
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz
Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/drivers/gpu/drm/tegra/rgb.c b/drivers/gpu/drm/tegra/rgb.c
index 4be4dfd..4142a56 100644
--- a/drivers/gpu/drm/tegra/rgb.c
+++ b/drivers/gpu/drm/tegra/rgb.c
@@ -7,7 +7,8 @@
#include <linux/clk.h>
#include <drm/drm_atomic_helper.h>
-#include <drm/drm_panel.h>
+#include <drm/drm_bridge_connector.h>
+#include <drm/drm_simple_kms_helper.h>
#include "drm.h"
#include "dc.h"
@@ -84,49 +85,13 @@
tegra_dc_writel(dc, table[i].value, table[i].offset);
}
-static const struct drm_connector_funcs tegra_rgb_connector_funcs = {
- .reset = drm_atomic_helper_connector_reset,
- .detect = tegra_output_connector_detect,
- .fill_modes = drm_helper_probe_single_connector_modes,
- .destroy = tegra_output_connector_destroy,
- .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
- .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-};
-
-static enum drm_mode_status
-tegra_rgb_connector_mode_valid(struct drm_connector *connector,
- struct drm_display_mode *mode)
-{
- /*
- * FIXME: For now, always assume that the mode is okay. There are
- * unresolved issues with clk_round_rate(), which doesn't always
- * reliably report whether a frequency can be set or not.
- */
- return MODE_OK;
-}
-
-static const struct drm_connector_helper_funcs tegra_rgb_connector_helper_funcs = {
- .get_modes = tegra_output_connector_get_modes,
- .mode_valid = tegra_rgb_connector_mode_valid,
-};
-
-static const struct drm_encoder_funcs tegra_rgb_encoder_funcs = {
- .destroy = tegra_output_encoder_destroy,
-};
-
static void tegra_rgb_encoder_disable(struct drm_encoder *encoder)
{
struct tegra_output *output = encoder_to_output(encoder);
struct tegra_rgb *rgb = to_rgb(output);
- if (output->panel)
- drm_panel_disable(output->panel);
-
tegra_dc_write_regs(rgb->dc, rgb_disable, ARRAY_SIZE(rgb_disable));
tegra_dc_commit(rgb->dc);
-
- if (output->panel)
- drm_panel_unprepare(output->panel);
}
static void tegra_rgb_encoder_enable(struct drm_encoder *encoder)
@@ -135,9 +100,6 @@
struct tegra_rgb *rgb = to_rgb(output);
u32 value;
- if (output->panel)
- drm_panel_prepare(output->panel);
-
tegra_dc_write_regs(rgb->dc, rgb_enable, ARRAY_SIZE(rgb_enable));
value = DE_SELECT_ACTIVE | DE_CONTROL_NORMAL;
@@ -159,9 +121,6 @@
tegra_dc_writel(rgb->dc, value, DC_DISP_SHIFT_CLOCK_OPTIONS);
tegra_dc_commit(rgb->dc);
-
- if (output->panel)
- drm_panel_enable(output->panel);
}
static int
@@ -270,25 +229,68 @@
int tegra_dc_rgb_init(struct drm_device *drm, struct tegra_dc *dc)
{
struct tegra_output *output = dc->rgb;
+ struct drm_connector *connector;
int err;
if (!dc->rgb)
return -ENODEV;
- drm_connector_init(drm, &output->connector, &tegra_rgb_connector_funcs,
- DRM_MODE_CONNECTOR_LVDS);
- drm_connector_helper_add(&output->connector,
- &tegra_rgb_connector_helper_funcs);
- output->connector.dpms = DRM_MODE_DPMS_OFF;
-
- drm_encoder_init(drm, &output->encoder, &tegra_rgb_encoder_funcs,
- DRM_MODE_ENCODER_LVDS, NULL);
+ drm_simple_encoder_init(drm, &output->encoder, DRM_MODE_ENCODER_LVDS);
drm_encoder_helper_add(&output->encoder,
&tegra_rgb_encoder_helper_funcs);
- drm_connector_attach_encoder(&output->connector,
- &output->encoder);
- drm_connector_register(&output->connector);
+ /*
+ * Wrap directly-connected panel into DRM bridge in order to let
+ * DRM core to handle panel for us.
+ */
+ if (output->panel) {
+ output->bridge = devm_drm_panel_bridge_add(output->dev,
+ output->panel);
+ if (IS_ERR(output->bridge)) {
+ dev_err(output->dev,
+ "failed to wrap panel into bridge: %pe\n",
+ output->bridge);
+ return PTR_ERR(output->bridge);
+ }
+
+ output->panel = NULL;
+ }
+
+ /*
+ * Tegra devices that have LVDS panel utilize LVDS encoder bridge
+ * for converting up to 28 LCD LVTTL lanes into 5/4 LVDS lanes that
+ * go to display panel's receiver.
+ *
+ * Encoder usually have a power-down control which needs to be enabled
+ * in order to transmit data to the panel. Historically devices that
+ * use an older device-tree version didn't model the bridge, assuming
+ * that encoder is turned ON by default, while today's DRM allows us
+ * to model LVDS encoder properly.
+ *
+ * Newer device-trees utilize LVDS encoder bridge, which provides
+ * us with a connector and handles the display panel.
+ *
+ * For older device-trees we wrapped panel into the panel-bridge.
+ */
+ if (output->bridge) {
+ err = drm_bridge_attach(&output->encoder, output->bridge,
+ NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+ if (err) {
+ dev_err(output->dev, "failed to attach bridge: %d\n",
+ err);
+ return err;
+ }
+
+ connector = drm_bridge_connector_init(drm, &output->encoder);
+ if (IS_ERR(connector)) {
+ dev_err(output->dev,
+ "failed to initialize bridge connector: %pe\n",
+ connector);
+ return PTR_ERR(connector);
+ }
+
+ drm_connector_attach_encoder(connector, &output->encoder);
+ }
err = tegra_output_init(drm, output);
if (err < 0) {