Enable support for R-Car Gen3 internal HDMI encoder.
config DRM_RCAR_LVDS
- bool "R-Car DU LVDS Encoder Support"
- depends on DRM_RCAR_DU
+ tristate "R-Car DU LVDS Encoder Support"
+ depends on DRM && DRM_BRIDGE && OF
select DRM_PANEL
select OF_FLATTREE
select OF_OVERLAY
rcar_du_encoder.o \
rcar_du_group.o \
rcar_du_kms.o \
- rcar_du_lvdscon.o \
rcar_du_plane.o
-rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS) += rcar_du_lvdsenc.o
rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS) += rcar_du_of.o \
rcar_du_of_lvds_r8a7790.dtb.o \
rcar_du_of_lvds_r8a7791.dtb.o \
obj-$(CONFIG_DRM_RCAR_DU) += rcar-du-drm.o
obj-$(CONFIG_DRM_RCAR_DW_HDMI) += rcar_dw_hdmi.o
+obj-$(CONFIG_DRM_RCAR_LVDS) += rcar_lvds.o
#include "rcar_du_drv.h"
#include "rcar_du_kms.h"
+#include "rcar_du_of.h"
#include "rcar_du_regs.h"
/* -----------------------------------------------------------------------------
.port = 1,
},
},
- .num_lvds = 0,
};
static const struct rcar_du_device_info rcar_du_r8a7779_info = {
.port = 1,
},
},
- .num_lvds = 0,
};
static const struct rcar_du_device_info rcar_du_r8a7790_info = {
.gen = 2,
.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
| RCAR_DU_FEATURE_EXT_CTRL_REGS,
- .quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
+ .quirks = RCAR_DU_QUIRK_ALIGN_128B,
.num_crtcs = 3,
.routes = {
/*
.port = 1,
},
},
- .num_lvds = 0,
};
static const struct rcar_du_device_info rcar_du_r8a7794_info = {
.port = 1,
},
},
- .num_lvds = 0,
};
static const struct rcar_du_device_info rcar_du_r8a7795_info = {
},
};
-module_platform_driver(rcar_du_platform_driver);
+static int __init rcar_du_init(void)
+{
+ rcar_du_of_init(rcar_du_of_table);
+
+ return platform_driver_register(&rcar_du_platform_driver);
+}
+module_init(rcar_du_init);
+
+static void __exit rcar_du_exit(void)
+{
+ platform_driver_unregister(&rcar_du_platform_driver);
+}
+module_exit(rcar_du_exit);
MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
struct drm_device;
struct drm_fbdev_cma;
struct rcar_du_device;
-struct rcar_du_lvdsenc;
#define RCAR_DU_FEATURE_CRTC_IRQ_CLOCK (1 << 0) /* Per-CRTC IRQ and clock */
#define RCAR_DU_FEATURE_EXT_CTRL_REGS (1 << 1) /* Has extended control registers */
#define RCAR_DU_FEATURE_VSP1_SOURCE (1 << 2) /* Has inputs from VSP1 */
#define RCAR_DU_QUIRK_ALIGN_128B (1 << 0) /* Align pitches to 128 bytes */
-#define RCAR_DU_QUIRK_LVDS_LANES (1 << 1) /* LVDS lanes 1 and 3 inverted */
/*
* struct rcar_du_output_routing - Output routing specification
#define RCAR_DU_MAX_CRTCS 4
#define RCAR_DU_MAX_GROUPS DIV_ROUND_UP(RCAR_DU_MAX_CRTCS, 2)
-#define RCAR_DU_MAX_LVDS 2
#define RCAR_DU_MAX_VSPS 4
struct rcar_du_device {
unsigned int dpad0_source;
unsigned int vspd1_sink;
-
- struct rcar_du_lvdsenc *lvds[RCAR_DU_MAX_LVDS];
};
static inline bool rcar_du_has(struct rcar_du_device *rcdu,
#include "rcar_du_drv.h"
#include "rcar_du_encoder.h"
#include "rcar_du_kms.h"
-#include "rcar_du_lvdscon.h"
-#include "rcar_du_lvdsenc.h"
/* -----------------------------------------------------------------------------
* Encoder
*/
-static void rcar_du_encoder_disable(struct drm_encoder *encoder)
-{
- struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
-
- if (renc->connector && renc->connector->panel) {
- drm_panel_disable(renc->connector->panel);
- drm_panel_unprepare(renc->connector->panel);
- }
-
- if (renc->lvds)
- rcar_du_lvdsenc_enable(renc->lvds, encoder->crtc, false);
-}
-
-static void rcar_du_encoder_enable(struct drm_encoder *encoder)
-{
- struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
-
- if (renc->lvds)
- rcar_du_lvdsenc_enable(renc->lvds, encoder->crtc, true);
-
- if (renc->connector && renc->connector->panel) {
- drm_panel_prepare(renc->connector->panel);
- drm_panel_enable(renc->connector->panel);
- }
-}
-
-static int rcar_du_encoder_atomic_check(struct drm_encoder *encoder,
- struct drm_crtc_state *crtc_state,
- struct drm_connector_state *conn_state)
-{
- struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
- struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
- const struct drm_display_mode *mode = &crtc_state->mode;
- struct drm_connector *connector = conn_state->connector;
- struct drm_device *dev = encoder->dev;
-
- /*
- * Only panel-related encoder types require validation here, everything
- * else is handled by the bridge drivers.
- */
- if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS) {
- const struct drm_display_mode *panel_mode;
-
- if (list_empty(&connector->modes)) {
- dev_dbg(dev->dev, "encoder: empty modes list\n");
- return -EINVAL;
- }
-
- panel_mode = list_first_entry(&connector->modes,
- struct drm_display_mode, head);
-
- /* We're not allowed to modify the resolution. */
- if (mode->hdisplay != panel_mode->hdisplay ||
- mode->vdisplay != panel_mode->vdisplay)
- return -EINVAL;
-
- /*
- * The flat panel mode is fixed, just copy it to the adjusted
- * mode.
- */
- drm_mode_copy(adjusted_mode, panel_mode);
- }
-
- if (renc->lvds)
- rcar_du_lvdsenc_atomic_check(renc->lvds, adjusted_mode);
-
- return 0;
-}
-
static void rcar_du_encoder_mode_set(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
- struct drm_display_info *info = &conn_state->connector->display_info;
- enum rcar_lvds_mode mode;
rcar_du_crtc_route_output(crtc_state->crtc, renc->output);
-
- if (!renc->lvds) {
- /*
- * The DU driver creates connectors only for the outputs of the
- * internal LVDS encoders.
- */
- renc->connector = NULL;
- return;
- }
-
- renc->connector = to_rcar_connector(conn_state->connector);
-
- if (!info->num_bus_formats || !info->bus_formats) {
- dev_err(encoder->dev->dev, "no LVDS bus format reported\n");
- return;
- }
-
- switch (info->bus_formats[0]) {
- case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
- case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
- mode = RCAR_LVDS_MODE_JEIDA;
- break;
- case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
- mode = RCAR_LVDS_MODE_VESA;
- break;
- default:
- dev_err(encoder->dev->dev,
- "unsupported LVDS bus format 0x%04x\n",
- info->bus_formats[0]);
- return;
- }
-
- if (info->bus_flags & DRM_BUS_FLAG_DATA_LSB_TO_MSB)
- mode |= RCAR_LVDS_MODE_MIRROR;
-
- rcar_du_lvdsenc_set_mode(renc->lvds, mode);
}
static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
.atomic_mode_set = rcar_du_encoder_mode_set,
- .disable = rcar_du_encoder_disable,
- .enable = rcar_du_encoder_enable,
- .atomic_check = rcar_du_encoder_atomic_check,
};
static const struct drm_encoder_funcs encoder_funcs = {
renc->output = output;
encoder = rcar_encoder_to_drm_encoder(renc);
- switch (output) {
- case RCAR_DU_OUTPUT_LVDS0:
- renc->lvds = rcdu->lvds[0];
- break;
+ dev_dbg(rcdu->dev, "initializing encoder %pOF for output %u\n",
+ enc_node, output);
- case RCAR_DU_OUTPUT_LVDS1:
- renc->lvds = rcdu->lvds[1];
- break;
-
- default:
- break;
- }
-
- if (enc_node) {
- dev_dbg(rcdu->dev, "initializing encoder %pOF for output %u\n",
- enc_node, output);
-
- /* Locate the DRM bridge from the encoder DT node. */
- bridge = of_drm_find_bridge(enc_node);
- if (!bridge) {
- ret = -EPROBE_DEFER;
- goto done;
- }
- } else {
- dev_dbg(rcdu->dev,
- "initializing internal encoder for output %u\n",
- output);
+ /* Locate the DRM bridge from the encoder DT node. */
+ bridge = of_drm_find_bridge(enc_node);
+ if (!bridge) {
+ ret = -EPROBE_DEFER;
+ goto done;
}
ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
drm_encoder_helper_add(encoder, &encoder_helper_funcs);
- if (bridge) {
- /*
- * Attach the bridge to the encoder. The bridge will create the
- * connector.
- */
- ret = drm_bridge_attach(encoder, bridge, NULL);
- if (ret) {
- drm_encoder_cleanup(encoder);
- return ret;
- }
- } else {
- /* There's no bridge, create the connector manually. */
- switch (output) {
- case RCAR_DU_OUTPUT_LVDS0:
- case RCAR_DU_OUTPUT_LVDS1:
- ret = rcar_du_lvds_connector_init(rcdu, renc, con_node);
- break;
-
- default:
- ret = -EINVAL;
- break;
- }
+ /*
+ * Attach the bridge to the encoder. The bridge will create the
+ * connector.
+ */
+ ret = drm_bridge_attach(encoder, bridge, NULL);
+ if (ret) {
+ drm_encoder_cleanup(encoder);
+ return ret;
}
done:
struct drm_panel;
struct rcar_du_device;
-struct rcar_du_lvdsenc;
struct rcar_du_encoder {
struct drm_encoder base;
enum rcar_du_output output;
- struct rcar_du_connector *connector;
- struct rcar_du_lvdsenc *lvds;
};
#define to_rcar_encoder(e) \
#define rcar_encoder_to_drm_encoder(e) (&(e)->base)
-struct rcar_du_connector {
- struct drm_connector connector;
- struct rcar_du_encoder *encoder;
- struct drm_panel *panel;
-};
-
-#define to_rcar_connector(c) \
- container_of(c, struct rcar_du_connector, connector)
-
int rcar_du_encoder_init(struct rcar_du_device *rcdu,
enum rcar_du_output output,
struct device_node *enc_node,
#include "rcar_du_drv.h"
#include "rcar_du_encoder.h"
#include "rcar_du_kms.h"
-#include "rcar_du_lvdsenc.h"
#include "rcar_du_regs.h"
#include "rcar_du_vsp.h"
of_node_put(entity_ep_node);
if (!encoder) {
- /*
- * If no encoder has been found the entity must be the
- * connector.
- */
- connector = entity;
+ dev_warn(rcdu->dev,
+ "no encoder found for endpoint %pOF, skipping\n",
+ ep->local_node);
+ return -ENODEV;
}
ret = rcar_du_encoder_init(rcdu, output, encoder, connector);
}
/* Initialize the encoders. */
- ret = rcar_du_lvdsenc_init(rcdu);
- if (ret < 0)
- return ret;
-
ret = rcar_du_encoders_init(rcdu);
if (ret < 0)
return ret;
+++ /dev/null
-/*
- * rcar_du_lvdscon.c -- R-Car Display Unit LVDS Connector
- *
- * Copyright (C) 2013-2014 Renesas Electronics Corporation
- *
- * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <drm/drmP.h>
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_crtc.h>
-#include <drm/drm_crtc_helper.h>
-#include <drm/drm_panel.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"
-#include "rcar_du_lvdscon.h"
-
-static int rcar_du_lvds_connector_get_modes(struct drm_connector *connector)
-{
- struct rcar_du_connector *rcon = to_rcar_connector(connector);
-
- return drm_panel_get_modes(rcon->panel);
-}
-
-static const struct drm_connector_helper_funcs connector_helper_funcs = {
- .get_modes = rcar_du_lvds_connector_get_modes,
-};
-
-static void rcar_du_lvds_connector_destroy(struct drm_connector *connector)
-{
- struct rcar_du_connector *rcon = to_rcar_connector(connector);
-
- drm_panel_detach(rcon->panel);
- drm_connector_cleanup(connector);
-}
-
-static const struct drm_connector_funcs connector_funcs = {
- .reset = drm_atomic_helper_connector_reset,
- .fill_modes = drm_helper_probe_single_connector_modes,
- .destroy = rcar_du_lvds_connector_destroy,
- .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
- .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-};
-
-int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
- struct rcar_du_encoder *renc,
- const struct device_node *np)
-{
- struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
- struct rcar_du_connector *rcon;
- struct drm_connector *connector;
- int ret;
-
- rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);
- if (rcon == NULL)
- return -ENOMEM;
-
- connector = &rcon->connector;
-
- rcon->panel = of_drm_find_panel(np);
- if (!rcon->panel)
- return -EPROBE_DEFER;
-
- ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
- DRM_MODE_CONNECTOR_LVDS);
- if (ret < 0)
- return ret;
-
- drm_connector_helper_add(connector, &connector_helper_funcs);
-
- ret = drm_mode_connector_attach_encoder(connector, encoder);
- if (ret < 0)
- return ret;
-
- ret = drm_panel_attach(rcon->panel, connector);
- if (ret < 0)
- return ret;
-
- rcon->encoder = renc;
-
- return 0;
-}
+++ /dev/null
-/*
- * rcar_du_lvdscon.h -- R-Car Display Unit LVDS Connector
- *
- * Copyright (C) 2013-2014 Renesas Electronics Corporation
- *
- * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef __RCAR_DU_LVDSCON_H__
-#define __RCAR_DU_LVDSCON_H__
-
-struct rcar_du_device;
-struct rcar_du_encoder;
-
-int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
- struct rcar_du_encoder *renc,
- const struct device_node *np);
-
-#endif /* __RCAR_DU_LVDSCON_H__ */
+++ /dev/null
-/*
- * rcar_du_lvdsenc.c -- R-Car Display Unit LVDS Encoder
- *
- * Copyright (C) 2013-2014 Renesas Electronics Corporation
- *
- * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-
-#include "rcar_du_drv.h"
-#include "rcar_du_encoder.h"
-#include "rcar_du_lvdsenc.h"
-#include "rcar_lvds_regs.h"
-
-struct rcar_du_lvdsenc {
- struct rcar_du_device *dev;
-
- unsigned int index;
- void __iomem *mmio;
- struct clk *clock;
- bool enabled;
-
- enum rcar_lvds_input input;
- enum rcar_lvds_mode mode;
-};
-
-static void rcar_lvds_write(struct rcar_du_lvdsenc *lvds, u32 reg, u32 data)
-{
- iowrite32(data, lvds->mmio + reg);
-}
-
-static u32 rcar_lvds_lvdpllcr_gen2(unsigned int freq)
-{
- if (freq < 39000)
- return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_38M;
- else if (freq < 61000)
- return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_60M;
- else if (freq < 121000)
- return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_121M;
- else
- return LVDPLLCR_PLLDLYCNT_150M;
-}
-
-static u32 rcar_lvds_lvdpllcr_gen3(unsigned int freq)
-{
- if (freq < 42000)
- return LVDPLLCR_PLLDIVCNT_42M;
- else if (freq < 85000)
- return LVDPLLCR_PLLDIVCNT_85M;
- else if (freq < 128000)
- return LVDPLLCR_PLLDIVCNT_128M;
- else
- return LVDPLLCR_PLLDIVCNT_148M;
-}
-
-static int rcar_du_lvdsenc_start(struct rcar_du_lvdsenc *lvds,
- struct rcar_du_crtc *rcrtc)
-{
- const struct drm_display_mode *mode = &rcrtc->crtc.mode;
- u32 lvdpllcr;
- u32 lvdhcr;
- u32 lvdcr0;
- int ret;
-
- if (lvds->enabled)
- return 0;
-
- ret = clk_prepare_enable(lvds->clock);
- if (ret < 0)
- return ret;
-
- /*
- * Hardcode the channels and control signals routing for now.
- *
- * HSYNC -> CTRL0
- * VSYNC -> CTRL1
- * DISP -> CTRL2
- * 0 -> CTRL3
- */
- rcar_lvds_write(lvds, LVDCTRCR, LVDCTRCR_CTR3SEL_ZERO |
- LVDCTRCR_CTR2SEL_DISP | LVDCTRCR_CTR1SEL_VSYNC |
- LVDCTRCR_CTR0SEL_HSYNC);
-
- if (rcar_du_needs(lvds->dev, RCAR_DU_QUIRK_LVDS_LANES))
- lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 3)
- | LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 1);
- else
- lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 1)
- | LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 3);
-
- rcar_lvds_write(lvds, LVDCHCR, lvdhcr);
-
- /* PLL clock configuration. */
- if (lvds->dev->info->gen < 3)
- lvdpllcr = rcar_lvds_lvdpllcr_gen2(mode->clock);
- else
- lvdpllcr = rcar_lvds_lvdpllcr_gen3(mode->clock);
- rcar_lvds_write(lvds, LVDPLLCR, lvdpllcr);
-
- /* Set the LVDS mode and select the input. */
- lvdcr0 = lvds->mode << LVDCR0_LVMD_SHIFT;
- if (rcrtc->index == 2)
- lvdcr0 |= LVDCR0_DUSEL;
- rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-
- /* Turn all the channels on. */
- rcar_lvds_write(lvds, LVDCR1,
- LVDCR1_CHSTBY(3) | LVDCR1_CHSTBY(2) |
- LVDCR1_CHSTBY(1) | LVDCR1_CHSTBY(0) | LVDCR1_CLKSTBY);
-
- if (lvds->dev->info->gen < 3) {
- /* Enable LVDS operation and turn the bias circuitry on. */
- lvdcr0 |= LVDCR0_BEN | LVDCR0_LVEN;
- rcar_lvds_write(lvds, LVDCR0, lvdcr0);
- }
-
- /* Turn the PLL on. */
- lvdcr0 |= LVDCR0_PLLON;
- rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-
- if (lvds->dev->info->gen > 2) {
- /* Set LVDS normal mode. */
- lvdcr0 |= LVDCR0_PWD;
- rcar_lvds_write(lvds, LVDCR0, lvdcr0);
- }
-
- /* Wait for the startup delay. */
- usleep_range(100, 150);
-
- /* Turn the output on. */
- lvdcr0 |= LVDCR0_LVRES;
- rcar_lvds_write(lvds, LVDCR0, lvdcr0);
-
- lvds->enabled = true;
-
- return 0;
-}
-
-static void rcar_du_lvdsenc_stop(struct rcar_du_lvdsenc *lvds)
-{
- if (!lvds->enabled)
- return;
-
- rcar_lvds_write(lvds, LVDCR0, 0);
- rcar_lvds_write(lvds, LVDCR1, 0);
-
- clk_disable_unprepare(lvds->clock);
-
- lvds->enabled = false;
-}
-
-int rcar_du_lvdsenc_enable(struct rcar_du_lvdsenc *lvds, struct drm_crtc *crtc,
- bool enable)
-{
- if (!enable) {
- rcar_du_lvdsenc_stop(lvds);
- return 0;
- } else if (crtc) {
- struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
- return rcar_du_lvdsenc_start(lvds, rcrtc);
- } else
- return -EINVAL;
-}
-
-void rcar_du_lvdsenc_atomic_check(struct rcar_du_lvdsenc *lvds,
- struct drm_display_mode *mode)
-{
- /*
- * The internal LVDS encoder has a restricted clock frequency operating
- * range (31MHz to 148.5MHz). Clamp the clock accordingly.
- */
- mode->clock = clamp(mode->clock, 31000, 148500);
-}
-
-void rcar_du_lvdsenc_set_mode(struct rcar_du_lvdsenc *lvds,
- enum rcar_lvds_mode mode)
-{
- lvds->mode = mode;
-}
-
-static int rcar_du_lvdsenc_get_resources(struct rcar_du_lvdsenc *lvds,
- struct platform_device *pdev)
-{
- struct resource *mem;
- char name[7];
-
- sprintf(name, "lvds.%u", lvds->index);
-
- mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
- lvds->mmio = devm_ioremap_resource(&pdev->dev, mem);
- if (IS_ERR(lvds->mmio))
- return PTR_ERR(lvds->mmio);
-
- lvds->clock = devm_clk_get(&pdev->dev, name);
- if (IS_ERR(lvds->clock)) {
- dev_err(&pdev->dev, "failed to get clock for %s\n", name);
- return PTR_ERR(lvds->clock);
- }
-
- return 0;
-}
-
-int rcar_du_lvdsenc_init(struct rcar_du_device *rcdu)
-{
- struct platform_device *pdev = to_platform_device(rcdu->dev);
- struct rcar_du_lvdsenc *lvds;
- unsigned int i;
- int ret;
-
- for (i = 0; i < rcdu->info->num_lvds; ++i) {
- lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);
- if (lvds == NULL)
- return -ENOMEM;
-
- lvds->dev = rcdu;
- lvds->index = i;
- lvds->input = i ? RCAR_LVDS_INPUT_DU1 : RCAR_LVDS_INPUT_DU0;
- lvds->enabled = false;
-
- ret = rcar_du_lvdsenc_get_resources(lvds, pdev);
- if (ret < 0)
- return ret;
-
- rcdu->lvds[i] = lvds;
- }
-
- return 0;
-}
+++ /dev/null
-/*
- * rcar_du_lvdsenc.h -- R-Car Display Unit LVDS Encoder
- *
- * Copyright (C) 2013-2014 Renesas Electronics Corporation
- *
- * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef __RCAR_DU_LVDSENC_H__
-#define __RCAR_DU_LVDSENC_H__
-
-#include <linux/io.h>
-#include <linux/module.h>
-
-struct rcar_drm_crtc;
-struct rcar_du_lvdsenc;
-
-enum rcar_lvds_input {
- RCAR_LVDS_INPUT_DU0,
- RCAR_LVDS_INPUT_DU1,
- RCAR_LVDS_INPUT_DU2,
-};
-
-/* Keep in sync with the LVDCR0.LVMD hardware register values. */
-enum rcar_lvds_mode {
- RCAR_LVDS_MODE_JEIDA = 0,
- RCAR_LVDS_MODE_MIRROR = 1,
- RCAR_LVDS_MODE_VESA = 4,
-};
-
-#if IS_ENABLED(CONFIG_DRM_RCAR_LVDS)
-int rcar_du_lvdsenc_init(struct rcar_du_device *rcdu);
-void rcar_du_lvdsenc_set_mode(struct rcar_du_lvdsenc *lvds,
- enum rcar_lvds_mode mode);
-int rcar_du_lvdsenc_enable(struct rcar_du_lvdsenc *lvds,
- struct drm_crtc *crtc, bool enable);
-void rcar_du_lvdsenc_atomic_check(struct rcar_du_lvdsenc *lvds,
- struct drm_display_mode *mode);
-#else
-static inline int rcar_du_lvdsenc_init(struct rcar_du_device *rcdu)
-{
- return 0;
-}
-static inline void rcar_du_lvdsenc_set_mode(struct rcar_du_lvdsenc *lvds,
- enum rcar_lvds_mode mode)
-{
-}
-static inline int rcar_du_lvdsenc_enable(struct rcar_du_lvdsenc *lvds,
- struct drm_crtc *crtc, bool enable)
-{
- return 0;
-}
-static inline void rcar_du_lvdsenc_atomic_check(struct rcar_du_lvdsenc *lvds,
- struct drm_display_mode *mode)
-{
-}
-#endif
-
-#endif /* __RCAR_DU_LVDSENC_H__ */
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rcar_lvds.c -- R-Car LVDS Encoder
+ *
+ * Copyright (C) 2013-2018 Renesas Electronics Corporation
+ *
+ * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_panel.h>
+
+#include "rcar_lvds_regs.h"
+
+/* Keep in sync with the LVDCR0.LVMD hardware register values. */
+enum rcar_lvds_mode {
+ RCAR_LVDS_MODE_JEIDA = 0,
+ RCAR_LVDS_MODE_MIRROR = 1,
+ RCAR_LVDS_MODE_VESA = 4,
+};
+
+#define RCAR_LVDS_QUIRK_LANES (1 << 0) /* LVDS lanes 1 and 3 inverted */
+
+struct rcar_lvds_device_info {
+ unsigned int gen;
+ unsigned int quirks;
+};
+
+struct rcar_lvds {
+ struct device *dev;
+ const struct rcar_lvds_device_info *info;
+
+ struct drm_bridge bridge;
+
+ struct drm_bridge *next_bridge;
+ struct drm_connector connector;
+ struct drm_panel *panel;
+
+ void __iomem *mmio;
+ struct clk *clock;
+ bool enabled;
+
+ struct drm_display_mode display_mode;
+ enum rcar_lvds_mode mode;
+};
+
+#define bridge_to_rcar_lvds(bridge) \
+ container_of(bridge, struct rcar_lvds, bridge)
+
+#define connector_to_rcar_lvds(connector) \
+ container_of(connector, struct rcar_lvds, connector)
+
+static void rcar_lvds_write(struct rcar_lvds *lvds, u32 reg, u32 data)
+{
+ iowrite32(data, lvds->mmio + reg);
+}
+
+/* -----------------------------------------------------------------------------
+ * Connector & Panel
+ */
+
+static int rcar_lvds_connector_get_modes(struct drm_connector *connector)
+{
+ struct rcar_lvds *lvds = connector_to_rcar_lvds(connector);
+
+ return drm_panel_get_modes(lvds->panel);
+}
+
+static int rcar_lvds_connector_atomic_check(struct drm_connector *connector,
+ struct drm_connector_state *state)
+{
+ struct rcar_lvds *lvds = connector_to_rcar_lvds(connector);
+ const struct drm_display_mode *panel_mode;
+ struct drm_crtc_state *crtc_state;
+
+ if (list_empty(&connector->modes)) {
+ dev_dbg(lvds->dev, "connector: empty modes list\n");
+ return -EINVAL;
+ }
+
+ panel_mode = list_first_entry(&connector->modes,
+ struct drm_display_mode, head);
+
+ /* We're not allowed to modify the resolution. */
+ crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
+ if (IS_ERR(crtc_state))
+ return PTR_ERR(crtc_state);
+
+ if (crtc_state->mode.hdisplay != panel_mode->hdisplay ||
+ crtc_state->mode.vdisplay != panel_mode->vdisplay)
+ return -EINVAL;
+
+ /* The flat panel mode is fixed, just copy it to the adjusted mode. */
+ drm_mode_copy(&crtc_state->adjusted_mode, panel_mode);
+
+ return 0;
+}
+
+static const struct drm_connector_helper_funcs rcar_lvds_conn_helper_funcs = {
+ .get_modes = rcar_lvds_connector_get_modes,
+ .atomic_check = rcar_lvds_connector_atomic_check,
+};
+
+static const struct drm_connector_funcs rcar_lvds_conn_funcs = {
+ .reset = drm_atomic_helper_connector_reset,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = drm_connector_cleanup,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+/* -----------------------------------------------------------------------------
+ * Bridge
+ */
+
+static u32 rcar_lvds_lvdpllcr_gen2(unsigned int freq)
+{
+ if (freq < 39000)
+ return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_38M;
+ else if (freq < 61000)
+ return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_60M;
+ else if (freq < 121000)
+ return LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_121M;
+ else
+ return LVDPLLCR_PLLDLYCNT_150M;
+}
+
+static u32 rcar_lvds_lvdpllcr_gen3(unsigned int freq)
+{
+ if (freq < 42000)
+ return LVDPLLCR_PLLDIVCNT_42M;
+ else if (freq < 85000)
+ return LVDPLLCR_PLLDIVCNT_85M;
+ else if (freq < 128000)
+ return LVDPLLCR_PLLDIVCNT_128M;
+ else
+ return LVDPLLCR_PLLDIVCNT_148M;
+}
+
+static void rcar_lvds_enable(struct drm_bridge *bridge)
+{
+ struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+ const struct drm_display_mode *mode = &lvds->display_mode;
+ /*
+ * FIXME: We should really retrieve the CRTC through the state, but how
+ * do we get a state pointer?
+ */
+ struct drm_crtc *crtc = lvds->bridge.encoder->crtc;
+ u32 lvdpllcr;
+ u32 lvdhcr;
+ u32 lvdcr0;
+ int ret;
+
+ WARN_ON(lvds->enabled);
+
+ ret = clk_prepare_enable(lvds->clock);
+ if (ret < 0)
+ return;
+
+ /*
+ * Hardcode the channels and control signals routing for now.
+ *
+ * HSYNC -> CTRL0
+ * VSYNC -> CTRL1
+ * DISP -> CTRL2
+ * 0 -> CTRL3
+ */
+ rcar_lvds_write(lvds, LVDCTRCR, LVDCTRCR_CTR3SEL_ZERO |
+ LVDCTRCR_CTR2SEL_DISP | LVDCTRCR_CTR1SEL_VSYNC |
+ LVDCTRCR_CTR0SEL_HSYNC);
+
+ if (lvds->info->quirks & RCAR_LVDS_QUIRK_LANES)
+ lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 3)
+ | LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 1);
+ else
+ lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 1)
+ | LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 3);
+
+ rcar_lvds_write(lvds, LVDCHCR, lvdhcr);
+
+ /* PLL clock configuration. */
+ if (lvds->info->gen < 3)
+ lvdpllcr = rcar_lvds_lvdpllcr_gen2(mode->clock);
+ else
+ lvdpllcr = rcar_lvds_lvdpllcr_gen3(mode->clock);
+ rcar_lvds_write(lvds, LVDPLLCR, lvdpllcr);
+
+ /* Set the LVDS mode and select the input. */
+ lvdcr0 = lvds->mode << LVDCR0_LVMD_SHIFT;
+ if (drm_crtc_index(crtc) == 2)
+ lvdcr0 |= LVDCR0_DUSEL;
+ rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+
+ /* Turn all the channels on. */
+ rcar_lvds_write(lvds, LVDCR1,
+ LVDCR1_CHSTBY(3) | LVDCR1_CHSTBY(2) |
+ LVDCR1_CHSTBY(1) | LVDCR1_CHSTBY(0) | LVDCR1_CLKSTBY);
+
+ if (lvds->info->gen < 3) {
+ /* Enable LVDS operation and turn the bias circuitry on. */
+ lvdcr0 |= LVDCR0_BEN | LVDCR0_LVEN;
+ rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+ }
+
+ /* Turn the PLL on. */
+ lvdcr0 |= LVDCR0_PLLON;
+ rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+
+ if (lvds->info->gen > 2) {
+ /* Set LVDS normal mode. */
+ lvdcr0 |= LVDCR0_PWD;
+ rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+ }
+
+ /* Wait for the startup delay. */
+ usleep_range(100, 150);
+
+ /* Turn the output on. */
+ lvdcr0 |= LVDCR0_LVRES;
+ rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+
+ if (lvds->panel) {
+ drm_panel_prepare(lvds->panel);
+ drm_panel_enable(lvds->panel);
+ }
+
+ lvds->enabled = true;
+}
+
+static void rcar_lvds_disable(struct drm_bridge *bridge)
+{
+ struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+
+ WARN_ON(!lvds->enabled);
+
+ if (lvds->panel) {
+ drm_panel_disable(lvds->panel);
+ drm_panel_unprepare(lvds->panel);
+ }
+
+ rcar_lvds_write(lvds, LVDCR0, 0);
+ rcar_lvds_write(lvds, LVDCR1, 0);
+
+ clk_disable_unprepare(lvds->clock);
+
+ lvds->enabled = false;
+}
+
+static bool rcar_lvds_mode_fixup(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ /*
+ * The internal LVDS encoder has a restricted clock frequency operating
+ * range (31MHz to 148.5MHz). Clamp the clock accordingly.
+ */
+ adjusted_mode->clock = clamp(adjusted_mode->clock, 31000, 148500);
+
+ return true;
+}
+
+static void rcar_lvds_get_lvds_mode(struct rcar_lvds *lvds)
+{
+ struct drm_display_info *info = &lvds->connector.display_info;
+ enum rcar_lvds_mode mode;
+
+ /*
+ * There is no API yet to retrieve LVDS mode from a bridge, only panels
+ * are supported.
+ */
+ if (!lvds->panel)
+ return;
+
+ if (!info->num_bus_formats || !info->bus_formats) {
+ dev_err(lvds->dev, "no LVDS bus format reported\n");
+ return;
+ }
+
+ switch (info->bus_formats[0]) {
+ case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
+ case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
+ mode = RCAR_LVDS_MODE_JEIDA;
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
+ mode = RCAR_LVDS_MODE_VESA;
+ break;
+ default:
+ dev_err(lvds->dev, "unsupported LVDS bus format 0x%04x\n",
+ info->bus_formats[0]);
+ return;
+ }
+
+ if (info->bus_flags & DRM_BUS_FLAG_DATA_LSB_TO_MSB)
+ mode |= RCAR_LVDS_MODE_MIRROR;
+
+ lvds->mode = mode;
+}
+
+static void rcar_lvds_mode_set(struct drm_bridge *bridge,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+
+ WARN_ON(lvds->enabled);
+
+ lvds->display_mode = *adjusted_mode;
+
+ rcar_lvds_get_lvds_mode(lvds);
+}
+
+static int rcar_lvds_attach(struct drm_bridge *bridge)
+{
+ struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+ struct drm_connector *connector = &lvds->connector;
+ struct drm_encoder *encoder = bridge->encoder;
+ int ret;
+
+ /* If we have a next bridge just attach it. */
+ if (lvds->next_bridge)
+ return drm_bridge_attach(bridge->encoder, lvds->next_bridge,
+ bridge);
+
+ /* Otherwise we have a panel, create a connector. */
+ ret = drm_connector_init(bridge->dev, connector, &rcar_lvds_conn_funcs,
+ DRM_MODE_CONNECTOR_LVDS);
+ if (ret < 0)
+ return ret;
+
+ drm_connector_helper_add(connector, &rcar_lvds_conn_helper_funcs);
+
+ ret = drm_mode_connector_attach_encoder(connector, encoder);
+ if (ret < 0)
+ return ret;
+
+ return drm_panel_attach(lvds->panel, connector);
+}
+
+static void rcar_lvds_detach(struct drm_bridge *bridge)
+{
+ struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
+
+ if (lvds->panel)
+ drm_panel_detach(lvds->panel);
+}
+
+static const struct drm_bridge_funcs rcar_lvds_bridge_ops = {
+ .attach = rcar_lvds_attach,
+ .detach = rcar_lvds_detach,
+ .enable = rcar_lvds_enable,
+ .disable = rcar_lvds_disable,
+ .mode_fixup = rcar_lvds_mode_fixup,
+ .mode_set = rcar_lvds_mode_set,
+};
+
+/* -----------------------------------------------------------------------------
+ * Probe & Remove
+ */
+
+static int rcar_lvds_parse_dt(struct rcar_lvds *lvds)
+{
+ struct device_node *local_output = NULL;
+ struct device_node *remote_input = NULL;
+ struct device_node *remote = NULL;
+ struct device_node *node;
+ bool is_bridge = false;
+ int ret = 0;
+
+ local_output = of_graph_get_endpoint_by_regs(lvds->dev->of_node, 1, 0);
+ if (!local_output) {
+ dev_dbg(lvds->dev, "unconnected port@1\n");
+ return -ENODEV;
+ }
+
+ /*
+ * Locate the connected entity and infer its type from the number of
+ * endpoints.
+ */
+ remote = of_graph_get_remote_port_parent(local_output);
+ if (!remote) {
+ dev_dbg(lvds->dev, "unconnected endpoint %pOF\n", local_output);
+ ret = -ENODEV;
+ goto done;
+ }
+
+ if (!of_device_is_available(remote)) {
+ dev_dbg(lvds->dev, "connected entity %pOF is disabled\n",
+ remote);
+ ret = -ENODEV;
+ goto done;
+ }
+
+ remote_input = of_graph_get_remote_endpoint(local_output);
+
+ for_each_endpoint_of_node(remote, node) {
+ if (node != remote_input) {
+ /*
+ * We've found one endpoint other than the input, this
+ * must be a bridge.
+ */
+ is_bridge = true;
+ of_node_put(node);
+ break;
+ }
+ }
+
+ if (is_bridge) {
+ lvds->next_bridge = of_drm_find_bridge(remote);
+ if (!lvds->next_bridge)
+ ret = -EPROBE_DEFER;
+ } else {
+ lvds->panel = of_drm_find_panel(remote);
+ if (!lvds->panel)
+ ret = -EPROBE_DEFER;
+ }
+
+done:
+ of_node_put(local_output);
+ of_node_put(remote_input);
+ of_node_put(remote);
+
+ return ret;
+}
+
+static int rcar_lvds_probe(struct platform_device *pdev)
+{
+ struct rcar_lvds *lvds;
+ struct resource *mem;
+ int ret;
+
+ lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);
+ if (lvds == NULL)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, lvds);
+
+ lvds->dev = &pdev->dev;
+ lvds->info = of_device_get_match_data(&pdev->dev);
+ lvds->enabled = false;
+
+ ret = rcar_lvds_parse_dt(lvds);
+ if (ret < 0)
+ return ret;
+
+ lvds->bridge.driver_private = lvds;
+ lvds->bridge.funcs = &rcar_lvds_bridge_ops;
+ lvds->bridge.of_node = pdev->dev.of_node;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ lvds->mmio = devm_ioremap_resource(&pdev->dev, mem);
+ if (IS_ERR(lvds->mmio))
+ return PTR_ERR(lvds->mmio);
+
+ lvds->clock = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(lvds->clock)) {
+ dev_err(&pdev->dev, "failed to get clock\n");
+ return PTR_ERR(lvds->clock);
+ }
+
+ drm_bridge_add(&lvds->bridge);
+
+ return 0;
+}
+
+static int rcar_lvds_remove(struct platform_device *pdev)
+{
+ struct rcar_lvds *lvds = platform_get_drvdata(pdev);
+
+ drm_bridge_remove(&lvds->bridge);
+
+ return 0;
+}
+
+static const struct rcar_lvds_device_info rcar_lvds_gen2_info = {
+ .gen = 2,
+};
+
+static const struct rcar_lvds_device_info rcar_lvds_r8a7790_info = {
+ .gen = 2,
+ .quirks = RCAR_LVDS_QUIRK_LANES,
+};
+
+static const struct rcar_lvds_device_info rcar_lvds_gen3_info = {
+ .gen = 3,
+};
+
+static const struct of_device_id rcar_lvds_of_table[] = {
+ { .compatible = "renesas,r8a7743-lvds", .data = &rcar_lvds_gen2_info },
+ { .compatible = "renesas,r8a7790-lvds", .data = &rcar_lvds_r8a7790_info },
+ { .compatible = "renesas,r8a7791-lvds", .data = &rcar_lvds_gen2_info },
+ { .compatible = "renesas,r8a7793-lvds", .data = &rcar_lvds_gen2_info },
+ { .compatible = "renesas,r8a7795-lvds", .data = &rcar_lvds_gen3_info },
+ { .compatible = "renesas,r8a7796-lvds", .data = &rcar_lvds_gen3_info },
+ { }
+};
+
+MODULE_DEVICE_TABLE(of, rcar_lvds_of_table);
+
+static struct platform_driver rcar_lvds_platform_driver = {
+ .probe = rcar_lvds_probe,
+ .remove = rcar_lvds_remove,
+ .driver = {
+ .name = "rcar-lvds",
+ .of_match_table = rcar_lvds_of_table,
+ },
+};
+
+module_platform_driver(rcar_lvds_platform_driver);
+
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
+MODULE_DESCRIPTION("Renesas R-Car LVDS Encoder Driver");
+MODULE_LICENSE("GPL");
projects / linux.git / commitdiff