6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> [ Upstream commit b2f3418b516e3485a14f10bfc09f20211dedc156 ] None of the boards ever supported by the upstream kernel used the custom DDC bus support with the LDB connector. If a need arises to do so, one should use panel-simple and its DDC bus code. Drop ddc-i2c-bus support from the imx-ldb driver. Reviewed-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> Tested-by: Chris Healy <cphealy@xxxxxxxxx> Tested-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> # on imx6q-nitrogen6x Link: https://patchwork.freedesktop.org/patch/msgid/20240602-drm-imx-cleanup-v3-6-e549e2a43100@xxxxxxxxxx Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> Stable-dep-of: f673055a4678 ("drm/imx: Add missing DRM_BRIDGE_CONNECTOR dependency") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/gpu/drm/imx/ipuv3/imx-ldb.c | 73 ++++------------------------- 1 file changed, 10 insertions(+), 63 deletions(-) diff --git a/drivers/gpu/drm/imx/ipuv3/imx-ldb.c b/drivers/gpu/drm/imx/ipuv3/imx-ldb.c index 1924d8921c620..3f669604377e7 100644 --- a/drivers/gpu/drm/imx/ipuv3/imx-ldb.c +++ b/drivers/gpu/drm/imx/ipuv3/imx-ldb.c @@ -25,7 +25,6 @@ #include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_bridge.h> -#include <drm/drm_edid.h> #include <drm/drm_managed.h> #include <drm/drm_of.h> #include <drm/drm_panel.h> @@ -70,7 +69,6 @@ struct imx_ldb_channel { struct drm_bridge *bridge; struct device_node *child; - struct i2c_adapter *ddc; int chno; struct drm_display_mode mode; int mode_valid; @@ -141,18 +139,6 @@ static int imx_ldb_connector_get_modes(struct drm_connector *connector) if (num_modes > 0) return num_modes; - if (imx_ldb_ch->ddc) { - const struct drm_edid *edid = drm_edid_read_ddc(connector, - imx_ldb_ch->ddc); - - if (edid) { - drm_edid_connector_update(connector, edid); - drm_edid_free(edid); - - return drm_edid_connector_add_modes(connector); - } - } - if (imx_ldb_ch->mode_valid) { struct drm_display_mode *mode; @@ -481,10 +467,9 @@ static int imx_ldb_register(struct drm_device *drm, */ drm_connector_helper_add(connector, &imx_ldb_connector_helper_funcs); - drm_connector_init_with_ddc(drm, connector, - &imx_ldb_connector_funcs, - DRM_MODE_CONNECTOR_LVDS, - imx_ldb_ch->ddc); + drm_connector_init(drm, connector, + &imx_ldb_connector_funcs, + DRM_MODE_CONNECTOR_LVDS); drm_connector_attach_encoder(connector, encoder); } @@ -551,39 +536,6 @@ static const struct of_device_id imx_ldb_dt_ids[] = { }; MODULE_DEVICE_TABLE(of, imx_ldb_dt_ids); -static int imx_ldb_panel_ddc(struct device *dev, - struct imx_ldb_channel *channel, struct device_node *child) -{ - struct device_node *ddc_node; - int ret; - - ddc_node = of_parse_phandle(child, "ddc-i2c-bus", 0); - if (ddc_node) { - channel->ddc = of_find_i2c_adapter_by_node(ddc_node); - of_node_put(ddc_node); - if (!channel->ddc) { - dev_warn(dev, "failed to get ddc i2c adapter\n"); - return -EPROBE_DEFER; - } - } - - if (!channel->ddc) { - /* if no DDC available, fallback to hardcoded EDID */ - dev_dbg(dev, "no ddc available\n"); - - if (!channel->panel) { - /* fallback to display-timings node */ - ret = of_get_drm_display_mode(child, - &channel->mode, - &channel->bus_flags, - OF_USE_NATIVE_MODE); - if (!ret) - channel->mode_valid = 1; - } - } - return 0; -} - static int imx_ldb_bind(struct device *dev, struct device *master, void *data) { struct drm_device *drm = data; @@ -694,11 +646,15 @@ static int imx_ldb_probe(struct platform_device *pdev) if (ret && ret != -ENODEV) goto free_child; - /* panel ddc only if there is no bridge */ - if (!channel->bridge) { - ret = imx_ldb_panel_ddc(dev, channel, child); + if (!channel->bridge && !channel->panel) { + ret = of_get_drm_display_mode(child, + &channel->mode, + &channel->bus_flags, + OF_USE_NATIVE_MODE); if (ret) goto free_child; + + channel->mode_valid = 1; } bus_format = of_get_bus_format(dev, child); @@ -732,15 +688,6 @@ static int imx_ldb_probe(struct platform_device *pdev) static void imx_ldb_remove(struct platform_device *pdev) { - struct imx_ldb *imx_ldb = platform_get_drvdata(pdev); - int i; - - for (i = 0; i < 2; i++) { - struct imx_ldb_channel *channel = &imx_ldb->channel[i]; - - i2c_put_adapter(channel->ddc); - } - component_del(&pdev->dev, &imx_ldb_ops); } -- 2.43.0
