Implement support for the R-Car DU DT bindings in the rcar-du DRM driver.
Signed-off-by: Laurent Pinchart laurent.pinchart+renesas@ideasonboard.com --- drivers/gpu/drm/rcar-du/rcar_du_drv.c | 170 ++++++++++++---------- drivers/gpu/drm/rcar-du/rcar_du_drv.h | 2 + drivers/gpu/drm/rcar-du/rcar_du_encoder.c | 11 +- drivers/gpu/drm/rcar-du/rcar_du_encoder.h | 3 +- drivers/gpu/drm/rcar-du/rcar_du_kms.c | 231 +++++++++++++++++++++++++++--- drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c | 30 +++- drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h | 3 +- 7 files changed, 344 insertions(+), 106 deletions(-)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c index fda64b7..4ee8cb2 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c @@ -15,6 +15,7 @@ #include <linux/io.h> #include <linux/mm.h> #include <linux/module.h> +#include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/pm.h> #include <linux/slab.h> @@ -30,6 +31,97 @@ #include "rcar_du_regs.h"
/* ----------------------------------------------------------------------------- + * Device Information + */ + +static const struct rcar_du_device_info rcar_du_r8a7779_info = { + .features = 0, + .num_crtcs = 2, + .routes = { + /* R8A7779 has two RGB outputs and one (currently unsupported) + * TCON output. + */ + [RCAR_DU_OUTPUT_DPAD0] = { + .possible_crtcs = BIT(0), + .encoder_type = DRM_MODE_ENCODER_NONE, + .port = 0, + }, + [RCAR_DU_OUTPUT_DPAD1] = { + .possible_crtcs = BIT(1) | BIT(0), + .encoder_type = DRM_MODE_ENCODER_NONE, + .port = 1, + }, + }, + .num_lvds = 0, +}; + +static const struct rcar_du_device_info rcar_du_r8a7790_info = { + .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8, + .quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES, + .num_crtcs = 3, + .routes = { + /* R8A7790 has one RGB output, two LVDS outputs and one + * (currently unsupported) TCON output. + */ + [RCAR_DU_OUTPUT_DPAD0] = { + .possible_crtcs = BIT(2) | BIT(1) | BIT(0), + .encoder_type = DRM_MODE_ENCODER_NONE, + .port = 0, + }, + [RCAR_DU_OUTPUT_LVDS0] = { + .possible_crtcs = BIT(0), + .encoder_type = DRM_MODE_ENCODER_LVDS, + .port = 1, + }, + [RCAR_DU_OUTPUT_LVDS1] = { + .possible_crtcs = BIT(2) | BIT(1), + .encoder_type = DRM_MODE_ENCODER_LVDS, + .port = 2, + }, + }, + .num_lvds = 2, +}; + +static const struct rcar_du_device_info rcar_du_r8a7791_info = { + .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8, + .num_crtcs = 2, + .routes = { + /* R8A7791 has one RGB output, one LVDS output and one + * (currently unsupported) TCON output. + */ + [RCAR_DU_OUTPUT_DPAD0] = { + .possible_crtcs = BIT(1), + .encoder_type = DRM_MODE_ENCODER_NONE, + .port = 0, + }, + [RCAR_DU_OUTPUT_LVDS0] = { + .possible_crtcs = BIT(0), + .encoder_type = DRM_MODE_ENCODER_LVDS, + .port = 1, + }, + }, + .num_lvds = 1, +}; + +static const struct platform_device_id rcar_du_id_table[] = { + { "rcar-du-r8a7779", (kernel_ulong_t)&rcar_du_r8a7779_info }, + { "rcar-du-r8a7790", (kernel_ulong_t)&rcar_du_r8a7790_info }, + { "rcar-du-r8a7791", (kernel_ulong_t)&rcar_du_r8a7791_info }, + { } +}; + +MODULE_DEVICE_TABLE(platform, rcar_du_id_table); + +static const struct of_device_id rcar_du_of_table[] = { + { .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info }, + { .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info }, + { .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info }, + { } +}; + +MODULE_DEVICE_TABLE(of, rcar_du_of_table); + +/* ----------------------------------------------------------------------------- * DRM operations */
@@ -53,12 +145,13 @@ static int rcar_du_unload(struct drm_device *dev) static int rcar_du_load(struct drm_device *dev, unsigned long flags) { struct platform_device *pdev = dev->platformdev; + struct device_node *np = pdev->dev.of_node; struct rcar_du_platform_data *pdata = pdev->dev.platform_data; struct rcar_du_device *rcdu; struct resource *mem; int ret;
- if (pdata == NULL) { + if (pdata == NULL && np == NULL) { dev_err(dev->dev, "no platform data\n"); return -ENODEV; } @@ -71,7 +164,8 @@ static int rcar_du_load(struct drm_device *dev, unsigned long flags)
rcdu->dev = &pdev->dev; rcdu->pdata = pdata; - rcdu->info = (struct rcar_du_device_info *)pdev->id_entry->driver_data; + rcdu->info = np ? of_match_device(rcar_du_of_table, rcdu->dev)->data + : (void *)platform_get_device_id(pdev)->driver_data; rcdu->ddev = dev; dev->dev_private = rcdu;
@@ -231,77 +325,6 @@ static int rcar_du_remove(struct platform_device *pdev) return 0; }
-static const struct rcar_du_device_info rcar_du_r8a7779_info = { - .features = 0, - .num_crtcs = 2, - .routes = { - /* R8A7779 has two RGB outputs and one (currently unsupported) - * TCON output. - */ - [RCAR_DU_OUTPUT_DPAD0] = { - .possible_crtcs = BIT(0), - .encoder_type = DRM_MODE_ENCODER_NONE, - }, - [RCAR_DU_OUTPUT_DPAD1] = { - .possible_crtcs = BIT(1) | BIT(0), - .encoder_type = DRM_MODE_ENCODER_NONE, - }, - }, - .num_lvds = 0, -}; - -static const struct rcar_du_device_info rcar_du_r8a7790_info = { - .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8, - .quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES, - .num_crtcs = 3, - .routes = { - /* R8A7790 has one RGB output, two LVDS outputs and one - * (currently unsupported) TCON output. - */ - [RCAR_DU_OUTPUT_DPAD0] = { - .possible_crtcs = BIT(2) | BIT(1) | BIT(0), - .encoder_type = DRM_MODE_ENCODER_NONE, - }, - [RCAR_DU_OUTPUT_LVDS0] = { - .possible_crtcs = BIT(0), - .encoder_type = DRM_MODE_ENCODER_LVDS, - }, - [RCAR_DU_OUTPUT_LVDS1] = { - .possible_crtcs = BIT(2) | BIT(1), - .encoder_type = DRM_MODE_ENCODER_LVDS, - }, - }, - .num_lvds = 2, -}; - -static const struct rcar_du_device_info rcar_du_r8a7791_info = { - .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8, - .num_crtcs = 2, - .routes = { - /* R8A7791 has one RGB output, one LVDS output and one - * (currently unsupported) TCON output. - */ - [RCAR_DU_OUTPUT_DPAD0] = { - .possible_crtcs = BIT(1), - .encoder_type = DRM_MODE_ENCODER_NONE, - }, - [RCAR_DU_OUTPUT_LVDS0] = { - .possible_crtcs = BIT(0), - .encoder_type = DRM_MODE_ENCODER_LVDS, - }, - }, - .num_lvds = 1, -}; - -static const struct platform_device_id rcar_du_id_table[] = { - { "rcar-du-r8a7779", (kernel_ulong_t)&rcar_du_r8a7779_info }, - { "rcar-du-r8a7790", (kernel_ulong_t)&rcar_du_r8a7790_info }, - { "rcar-du-r8a7791", (kernel_ulong_t)&rcar_du_r8a7791_info }, - { } -}; - -MODULE_DEVICE_TABLE(platform, rcar_du_id_table); - static struct platform_driver rcar_du_platform_driver = { .probe = rcar_du_probe, .remove = rcar_du_remove, @@ -309,6 +332,7 @@ static struct platform_driver rcar_du_platform_driver = { .owner = THIS_MODULE, .name = "rcar-du", .pm = &rcar_du_pm_ops, + .of_match_table = rcar_du_of_table, }, .id_table = rcar_du_id_table, }; diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h index e31b735..c6e944b 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h @@ -37,6 +37,7 @@ struct rcar_du_lvdsenc; * struct rcar_du_output_routing - Output routing specification * @possible_crtcs: bitmask of possible CRTCs for the output * @encoder_type: DRM type of the internal encoder associated with the output + * @port: device tree port number corresponding to this output route * * The DU has 5 possible outputs (DPAD0/1, LVDS0/1, TCON). Output routing data * specify the valid SoC outputs, which CRTCs can drive the output, and the type @@ -45,6 +46,7 @@ struct rcar_du_lvdsenc; struct rcar_du_output_routing { unsigned int possible_crtcs; unsigned int encoder_type; + unsigned int port; };
/* diff --git a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c index 3daa7a1..1adfd29 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c @@ -142,7 +142,8 @@ static const struct drm_encoder_funcs encoder_funcs = { int rcar_du_encoder_init(struct rcar_du_device *rcdu, enum rcar_du_encoder_type type, enum rcar_du_output output, - const struct rcar_du_encoder_data *data) + const struct rcar_du_encoder_data *data, + struct device_node *np) { struct rcar_du_encoder *renc; unsigned int encoder_type; @@ -189,9 +190,11 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu, drm_encoder_helper_add(&renc->encoder, &encoder_helper_funcs);
switch (encoder_type) { - case DRM_MODE_ENCODER_LVDS: - return rcar_du_lvds_connector_init(rcdu, renc, - &data->connector.lvds.panel); + case DRM_MODE_ENCODER_LVDS: { + const struct rcar_du_panel_data *pdata = + data ? &data->connector.lvds.panel : NULL; + return rcar_du_lvds_connector_init(rcdu, renc, pdata, np); + }
case DRM_MODE_ENCODER_DAC: return rcar_du_vga_connector_init(rcdu, renc); diff --git a/drivers/gpu/drm/rcar-du/rcar_du_encoder.h b/drivers/gpu/drm/rcar-du/rcar_du_encoder.h index 0e5a65e..0524baa 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_encoder.h +++ b/drivers/gpu/drm/rcar-du/rcar_du_encoder.h @@ -44,6 +44,7 @@ rcar_du_connector_best_encoder(struct drm_connector *connector); int rcar_du_encoder_init(struct rcar_du_device *rcdu, enum rcar_du_encoder_type type, enum rcar_du_output output, - const struct rcar_du_encoder_data *data); + const struct rcar_du_encoder_data *data, + struct device_node *np);
#endif /* __RCAR_DU_ENCODER_H__ */ diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c index 7602610..7558570 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c @@ -17,6 +17,8 @@ #include <drm/drm_fb_cma_helper.h> #include <drm/drm_gem_cma_helper.h>
+#include <linux/of_graph.h> + #include "rcar_du_crtc.h" #include "rcar_du_drv.h" #include "rcar_du_encoder.h" @@ -188,6 +190,205 @@ static const struct drm_mode_config_funcs rcar_du_mode_config_funcs = { .output_poll_changed = rcar_du_output_poll_changed, };
+static int rcar_du_encoders_init_pdata(struct rcar_du_device *rcdu) +{ + unsigned int num_encoders = 0; + unsigned int i; + int ret; + + for (i = 0; i < rcdu->pdata->num_encoders; ++i) { + const struct rcar_du_encoder_data *pdata = + &rcdu->pdata->encoders[i]; + const struct rcar_du_output_routing *route = + &rcdu->info->routes[pdata->output]; + + if (pdata->type == RCAR_DU_ENCODER_UNUSED) + continue; + + if (pdata->output >= RCAR_DU_OUTPUT_MAX || + route->possible_crtcs == 0) { + dev_warn(rcdu->dev, + "encoder %u references unexisting output %u, skipping\n", + i, pdata->output); + continue; + } + + ret = rcar_du_encoder_init(rcdu, pdata->type, pdata->output, + pdata, NULL); + if (ret < 0) + return ret; + + num_encoders++; + } + + return num_encoders; +} + +static int rcar_du_encoders_init_dt_one(struct rcar_du_device *rcdu, + enum rcar_du_output output, + struct of_endpoint *ep) +{ + static const struct { + const char *compatible; + enum rcar_du_encoder_type type; + } encoders[] = { + { "adi,adv7123", RCAR_DU_ENCODER_VGA }, + { "thine,thc63lvdm83d", RCAR_DU_ENCODER_LVDS }, + }; + + enum rcar_du_encoder_type enc_type = RCAR_DU_ENCODER_NONE; + struct device_node *connector = NULL; + struct device_node *encoder = NULL; + struct device_node *prev = NULL; + struct device_node *entity_ep_node; + struct device_node *entity; + int ret; + + /* + * Locate the connected entity and infer its type from the number of + * endpoints. + */ + entity = of_graph_get_remote_port_parent(ep->local_node); + if (!entity) { + dev_dbg(rcdu->dev, "unconnected endpoint %s, skipping\n", + ep->local_node->full_name); + return 0; + } + + entity_ep_node = of_parse_phandle(ep->local_node, "remote-endpoint", 0); + + while (1) { + struct device_node *ep_node; + + ep_node = of_graph_get_next_endpoint(entity, prev); + of_node_put(prev); + prev = ep_node; + + if (!ep_node) + break; + + if (ep_node == entity_ep_node) + continue; + + /* + * We've found one endpoint other than the input, this must + * be an encoder. Locate the connector. + */ + encoder = entity; + connector = of_graph_get_remote_port_parent(ep_node); + of_node_put(ep_node); + + if (!connector) { + dev_warn(rcdu->dev, + "no connector for encoder %s, skipping\n", + encoder->full_name); + of_node_put(entity_ep_node); + of_node_put(encoder); + return 0; + } + + break; + } + + of_node_put(entity_ep_node); + + if (encoder) { + /* + * If an encoder has been found, get its type based on its + * compatible string. + */ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(encoders); ++i) { + if (of_device_is_compatible(encoder, + encoders[i].compatible)) { + enc_type = encoders[i].type; + break; + } + } + + if (i == ARRAY_SIZE(encoders)) { + dev_warn(rcdu->dev, + "unknown encoder type for %s, skipping\n", + encoder->full_name); + of_node_put(encoder); + of_node_put(connector); + return 0; + } + } else { + /* + * If no encoder has been found the entity must be the + * connector. + */ + connector = entity; + } + + ret = rcar_du_encoder_init(rcdu, enc_type, output, NULL, connector); + of_node_put(encoder); + of_node_put(connector); + + return ret < 0 ? ret : 1; +} + +static int rcar_du_encoders_init_dt(struct rcar_du_device *rcdu) +{ + struct device_node *np = rcdu->dev->of_node; + struct device_node *prev = NULL; + unsigned int num_encoders = 0; + + /* + * Iterate over the endpoints and create one encoder for each output + * pipeline. + */ + while (1) { + struct device_node *ep_node; + enum rcar_du_output output; + struct of_endpoint ep; + unsigned int i; + int ret; + + ep_node = of_graph_get_next_endpoint(np, prev); + of_node_put(prev); + prev = ep_node; + + if (ep_node == NULL) + break; + + ret = of_graph_parse_endpoint(ep_node, &ep); + if (ret < 0) { + of_node_put(ep_node); + return ret; + } + + /* Find the output route corresponding to the port number. */ + for (i = 0; i < RCAR_DU_OUTPUT_MAX; ++i) { + if (rcdu->info->routes[i].possible_crtcs && + rcdu->info->routes[i].port == ep.port) { + output = i; + break; + } + } + + if (i == RCAR_DU_OUTPUT_MAX) { + dev_warn(rcdu->dev, + "port %u references unexisting output, skipping\n", + ep.port); + continue; + } + + /* Process the output pipeline. */ + ret = rcar_du_encoders_init_dt_one(rcdu, output, &ep); + if (ret < 0) { + of_node_put(ep_node); + return ret; + } + + num_encoders += ret; + } + + return num_encoders; +} + int rcar_du_modeset_init(struct rcar_du_device *rcdu) { static const unsigned int mmio_offsets[] = { @@ -197,6 +398,7 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu) struct drm_device *dev = rcdu->ddev; struct drm_encoder *encoder; struct drm_fbdev_cma *fbdev; + unsigned int num_encoders; unsigned int num_groups; unsigned int i; int ret; @@ -240,28 +442,15 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu) if (ret < 0) return ret;
- for (i = 0; i < rcdu->pdata->num_encoders; ++i) { - const struct rcar_du_encoder_data *pdata = - &rcdu->pdata->encoders[i]; - const struct rcar_du_output_routing *route = - &rcdu->info->routes[pdata->output]; - - if (pdata->type == RCAR_DU_ENCODER_UNUSED) - continue; + if (rcdu->pdata) + ret = rcar_du_encoders_init_pdata(rcdu); + else + ret = rcar_du_encoders_init_dt(rcdu);
- if (pdata->output >= RCAR_DU_OUTPUT_MAX || - route->possible_crtcs == 0) { - dev_warn(rcdu->dev, - "encoder %u references unexisting output %u, skipping\n", - i, pdata->output); - continue; - } + if (ret < 0) + return ret;
- ret = rcar_du_encoder_init(rcdu, pdata->type, pdata->output, - pdata); - if (ret < 0) - return ret; - } + num_encoders = ret;
/* Set the possible CRTCs and possible clones. There's always at least * one way for all encoders to clone each other, set all bits in the @@ -273,7 +462,7 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu) &rcdu->info->routes[renc->output];
encoder->possible_crtcs = route->possible_crtcs; - encoder->possible_clones = (1 << rcdu->pdata->num_encoders) - 1; + encoder->possible_clones = (1 << num_encoders) - 1; }
/* Now that the CRTCs have been initialized register the planes. */ diff --git a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c b/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c index f2d92a0..dae5052 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c @@ -15,6 +15,10 @@ #include <drm/drm_crtc.h> #include <drm/drm_crtc_helper.h>
+#include <video/display_timing.h> +#include <video/of_display_timing.h> +#include <video/videomode.h> + #include "rcar_du_drv.h" #include "rcar_du_encoder.h" #include "rcar_du_kms.h" @@ -23,7 +27,7 @@ struct rcar_du_lvds_connector { struct rcar_du_connector connector;
- const struct rcar_du_panel_data *panel; + struct rcar_du_panel_data panel; };
#define to_rcar_lvds_connector(c) \ @@ -41,7 +45,7 @@ static int rcar_du_lvds_connector_get_modes(struct drm_connector *connector)
mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
- drm_display_mode_from_videomode(&lvdscon->panel->mode, mode); + drm_display_mode_from_videomode(&lvdscon->panel.mode, mode);
drm_mode_probed_add(connector, mode);
@@ -74,7 +78,8 @@ static const struct drm_connector_funcs connector_funcs = {
int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu, struct rcar_du_encoder *renc, - const struct rcar_du_panel_data *panel) + const struct rcar_du_panel_data *panel, + /* TODO const */ struct device_node *np) { struct rcar_du_lvds_connector *lvdscon; struct drm_connector *connector; @@ -84,11 +89,24 @@ int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu, if (lvdscon == NULL) return -ENOMEM;
- lvdscon->panel = panel; + if (panel) { + lvdscon->panel = *panel; + } else { + struct display_timing timing; + + ret = of_get_display_timing(np, "panel-timing", &timing); + if (ret < 0) + return ret; + + videomode_from_timing(&timing, &lvdscon->panel.mode); + + of_property_read_u32(np, "width-mm", &lvdscon->panel.width_mm); + of_property_read_u32(np, "height-mm", &lvdscon->panel.height_mm); + }
connector = &lvdscon->connector.connector; - connector->display_info.width_mm = panel->width_mm; - connector->display_info.height_mm = panel->height_mm; + connector->display_info.width_mm = lvdscon->panel.width_mm; + connector->display_info.height_mm = lvdscon->panel.height_mm;
ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs, DRM_MODE_CONNECTOR_LVDS); diff --git a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h b/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h index bff8683..c2fffd3 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h +++ b/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h @@ -20,6 +20,7 @@ struct rcar_du_panel_data;
int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu, struct rcar_du_encoder *renc, - const struct rcar_du_panel_data *panel); + const struct rcar_du_panel_data *panel, + struct device_node *np);
#endif /* __RCAR_DU_LVDSCON_H__ */