help
Choose this option if you have an R-Car chipset.
If M is selected the module will be called rcar-du-drm.
+
+config DRM_RCAR_LVDS
+ bool "R-Car DU LVDS Encoder Support"
+ depends on DRM_RCAR_DU
+ help
+ Enable support the R-Car Display Unit embedded LVDS encoders
+ (currently only on R8A7790).
rcar_du_plane.o \
rcar_du_vgacon.o
-obj-$(CONFIG_DRM_RCAR_DU) += rcar-du-drm.o
+rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS) += rcar_du_lvdsenc.o
+
+obj-$(CONFIG_DRM_RCAR_DU) += rcar-du-drm.o
#include "rcar_du_plane.h"
#include "rcar_du_regs.h"
-#define to_rcar_crtc(c) container_of(c, struct rcar_du_crtc, crtc)
-
static u32 rcar_du_crtc_read(struct rcar_du_crtc *rcrtc, u32 reg)
{
struct rcar_du_device *rcdu = rcrtc->group->dev;
struct rcar_du_plane *plane;
};
+#define to_rcar_crtc(c) container_of(c, struct rcar_du_crtc, crtc)
+
int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int index);
void rcar_du_crtc_enable_vblank(struct rcar_du_crtc *rcrtc, bool enable);
void rcar_du_crtc_cancel_page_flip(struct rcar_du_crtc *rcrtc,
.encoder_type = DRM_MODE_ENCODER_NONE,
},
},
+ .num_lvds = 0,
};
static const struct rcar_du_device_info rcar_du_r8a7790_info = {
.encoder_type = DRM_MODE_ENCODER_LVDS,
},
},
+ .num_lvds = 2,
};
static const struct platform_device_id rcar_du_id_table[] = {
struct device;
struct drm_device;
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_ALIGN_128B (1 << 1) /* Align pitches to 128 bytes */
* @features: device features (RCAR_DU_FEATURE_*)
* @num_crtcs: total number of CRTCs
* @routes: array of CRTC to output routes, indexed by output (RCAR_DU_OUTPUT_*)
+ * @num_lvds: number of internal LVDS encoders
*/
struct rcar_du_device_info {
unsigned int features;
unsigned int num_crtcs;
struct rcar_du_output_routing routes[RCAR_DU_OUTPUT_MAX];
+ unsigned int num_lvds;
};
struct rcar_du_device {
struct rcar_du_group groups[2];
unsigned int dpad0_source;
+ struct rcar_du_lvdsenc *lvds[2];
};
static inline bool rcar_du_has(struct rcar_du_device *rcdu,
* (at your option) any later version.
*/
+#include <linux/export.h>
+
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include "rcar_du_encoder.h"
#include "rcar_du_kms.h"
#include "rcar_du_lvdscon.h"
+#include "rcar_du_lvdsenc.h"
#include "rcar_du_vgacon.h"
/* -----------------------------------------------------------------------------
static void rcar_du_encoder_dpms(struct drm_encoder *encoder, int mode)
{
+ struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
+
+ if (renc->lvds)
+ rcar_du_lvdsenc_dpms(renc->lvds, encoder->crtc, mode);
}
static bool rcar_du_encoder_mode_fixup(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
+ struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
const struct drm_display_mode *panel_mode;
struct drm_device *dev = encoder->dev;
struct drm_connector *connector;
/* The flat panel mode is fixed, just copy it to the adjusted mode. */
drm_mode_copy(adjusted_mode, panel_mode);
+ /* The internal LVDS encoder has a clock frequency operating range of
+ * 30MHz to 150MHz. Clamp the clock accordingly.
+ */
+ if (renc->lvds)
+ adjusted_mode->clock = clamp(adjusted_mode->clock,
+ 30000, 150000);
+
return true;
}
static void rcar_du_encoder_mode_prepare(struct drm_encoder *encoder)
{
+ struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
+
+ if (renc->lvds)
+ rcar_du_lvdsenc_dpms(renc->lvds, encoder->crtc,
+ DRM_MODE_DPMS_OFF);
}
static void rcar_du_encoder_mode_commit(struct drm_encoder *encoder)
{
+ struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
+
+ if (renc->lvds)
+ rcar_du_lvdsenc_dpms(renc->lvds, encoder->crtc,
+ DRM_MODE_DPMS_ON);
}
static void rcar_du_encoder_mode_set(struct drm_encoder *encoder,
renc->output = output;
+ switch (output) {
+ case RCAR_DU_OUTPUT_LVDS0:
+ renc->lvds = rcdu->lvds[0];
+ break;
+
+ case RCAR_DU_OUTPUT_LVDS1:
+ renc->lvds = rcdu->lvds[1];
+ break;
+
+ default:
+ break;
+ }
+
switch (type) {
case RCAR_DU_ENCODER_VGA:
encoder_type = DRM_MODE_ENCODER_DAC;
#include <drm/drm_crtc.h>
struct rcar_du_device;
+struct rcar_du_lvdsenc;
struct rcar_du_encoder {
struct drm_encoder encoder;
enum rcar_du_output output;
+ struct rcar_du_lvdsenc *lvds;
};
#define to_rcar_encoder(e) \
#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"
/* -----------------------------------------------------------------------------
}
/* Initialize the encoders. */
+ ret = rcar_du_lvdsenc_init(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];
--- /dev/null
+/*
+ * rcar_du_lvdsenc.c -- R-Car Display Unit LVDS Encoder
+ *
+ * Copyright (C) 2013 Renesas 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;
+ int dpms;
+
+ enum rcar_lvds_input input;
+};
+
+static void rcar_lvds_write(struct rcar_du_lvdsenc *lvds, u32 reg, u32 data)
+{
+ iowrite32(data, lvds->mmio + reg);
+}
+
+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;
+ unsigned int freq = mode->clock;
+ u32 lvdcr0;
+ u32 pllcr;
+ int ret;
+
+ if (lvds->dpms == DRM_MODE_DPMS_ON)
+ return 0;
+
+ ret = clk_prepare_enable(lvds->clock);
+ if (ret < 0)
+ return ret;
+
+ /* PLL clock configuration */
+ if (freq <= 38000)
+ pllcr = LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_38M;
+ else if (freq <= 60000)
+ pllcr = LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_60M;
+ else if (freq <= 121000)
+ pllcr = LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_121M;
+ else
+ pllcr = LVDPLLCR_PLLDLYCNT_150M;
+
+ rcar_lvds_write(lvds, LVDPLLCR, pllcr);
+
+ /* Hardcode the channels and control signals routing for now.
+ *
+ * HSYNC -> CTRL0
+ * VSYNC -> CTRL1
+ * DISP -> CTRL2
+ * 0 -> CTRL3
+ *
+ * Channels 1 and 3 are switched on ES1.
+ */
+ rcar_lvds_write(lvds, LVDCTRCR, LVDCTRCR_CTR3SEL_ZERO |
+ LVDCTRCR_CTR2SEL_DISP | LVDCTRCR_CTR1SEL_VSYNC |
+ LVDCTRCR_CTR0SEL_HSYNC);
+ rcar_lvds_write(lvds, LVDCHCR,
+ LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 3) |
+ LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 1));
+
+ /* Select the input, hardcode mode 0, enable LVDS operation and turn
+ * bias circuitry on.
+ */
+ lvdcr0 = LVDCR0_BEN | LVDCR0_LVEN;
+ 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);
+
+ /* Turn the PLL on, wait for the startup delay, and turn the output
+ * on.
+ */
+ lvdcr0 |= LVDCR0_PLLEN;
+ rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+
+ usleep_range(100, 150);
+
+ lvdcr0 |= LVDCR0_LVRES;
+ rcar_lvds_write(lvds, LVDCR0, lvdcr0);
+
+ lvds->dpms = DRM_MODE_DPMS_ON;
+ return 0;
+}
+
+static void rcar_du_lvdsenc_stop(struct rcar_du_lvdsenc *lvds)
+{
+ if (lvds->dpms == DRM_MODE_DPMS_OFF)
+ return;
+
+ rcar_lvds_write(lvds, LVDCR0, 0);
+ rcar_lvds_write(lvds, LVDCR1, 0);
+
+ clk_disable_unprepare(lvds->clock);
+
+ lvds->dpms = DRM_MODE_DPMS_OFF;
+}
+
+int rcar_du_lvdsenc_dpms(struct rcar_du_lvdsenc *lvds,
+ struct drm_crtc *crtc, int mode)
+{
+ if (mode == DRM_MODE_DPMS_OFF) {
+ 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;
+}
+
+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);
+ if (mem == NULL) {
+ dev_err(&pdev->dev, "failed to get memory resource for %s\n",
+ name);
+ return -EINVAL;
+ }
+
+ lvds->mmio = devm_ioremap_resource(&pdev->dev, mem);
+ if (lvds->mmio == NULL) {
+ dev_err(&pdev->dev, "failed to remap memory resource for %s\n",
+ name);
+ return -ENOMEM;
+ }
+
+ 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) {
+ dev_err(&pdev->dev, "failed to allocate private data\n");
+ return -ENOMEM;
+ }
+
+ lvds->dev = rcdu;
+ lvds->index = i;
+ lvds->input = i ? RCAR_LVDS_INPUT_DU1 : RCAR_LVDS_INPUT_DU0;
+ lvds->dpms = DRM_MODE_DPMS_OFF;
+
+ 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 Renesas 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>
+#include <linux/platform_data/rcar-du.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,
+};
+
+#if IS_ENABLED(CONFIG_DRM_RCAR_LVDS)
+int rcar_du_lvdsenc_init(struct rcar_du_device *rcdu);
+int rcar_du_lvdsenc_dpms(struct rcar_du_lvdsenc *lvds,
+ struct drm_crtc *crtc, int mode);
+#else
+static inline int rcar_du_lvdsenc_init(struct rcar_du_device *rcdu)
+{
+ return 0;
+}
+static inline int rcar_du_lvdsenc_dpms(struct rcar_du_lvdsenc *lvds,
+ struct drm_crtc *crtc, int mode)
+{
+ return 0;
+}
+#endif
+
+#endif /* __RCAR_DU_LVDSENC_H__ */
--- /dev/null
+/*
+ * rcar_lvds_regs.h -- R-Car LVDS Interface Registers Definitions
+ *
+ * Copyright (C) 2013 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 version 2
+ * as published by the Free Software Foundation.
+ */
+
+#ifndef __RCAR_LVDS_REGS_H__
+#define __RCAR_LVDS_REGS_H__
+
+#define LVDCR0 0x0000
+#define LVDCR0_DUSEL (1 << 15)
+#define LVDCR0_DMD (1 << 12)
+#define LVDCR0_LVMD_MASK (0xf << 8)
+#define LVDCR0_LVMD_SHIFT 8
+#define LVDCR0_PLLEN (1 << 4)
+#define LVDCR0_BEN (1 << 2)
+#define LVDCR0_LVEN (1 << 1)
+#define LVDCR0_LVRES (1 << 0)
+
+#define LVDCR1 0x0004
+#define LVDCR1_CKSEL (1 << 15)
+#define LVDCR1_CHSTBY(n) (3 << (2 + (n) * 2))
+#define LVDCR1_CLKSTBY (3 << 0)
+
+#define LVDPLLCR 0x0008
+#define LVDPLLCR_CEEN (1 << 14)
+#define LVDPLLCR_FBEN (1 << 13)
+#define LVDPLLCR_COSEL (1 << 12)
+#define LVDPLLCR_PLLDLYCNT_150M (0x1bf << 0)
+#define LVDPLLCR_PLLDLYCNT_121M (0x22c << 0)
+#define LVDPLLCR_PLLDLYCNT_60M (0x77b << 0)
+#define LVDPLLCR_PLLDLYCNT_38M (0x69a << 0)
+#define LVDPLLCR_PLLDLYCNT_MASK (0x7ff << 0)
+
+#define LVDCTRCR 0x000c
+#define LVDCTRCR_CTR3SEL_ZERO (0 << 12)
+#define LVDCTRCR_CTR3SEL_ODD (1 << 12)
+#define LVDCTRCR_CTR3SEL_CDE (2 << 12)
+#define LVDCTRCR_CTR3SEL_MASK (7 << 12)
+#define LVDCTRCR_CTR2SEL_DISP (0 << 8)
+#define LVDCTRCR_CTR2SEL_ODD (1 << 8)
+#define LVDCTRCR_CTR2SEL_CDE (2 << 8)
+#define LVDCTRCR_CTR2SEL_HSYNC (3 << 8)
+#define LVDCTRCR_CTR2SEL_VSYNC (4 << 8)
+#define LVDCTRCR_CTR2SEL_MASK (7 << 8)
+#define LVDCTRCR_CTR1SEL_VSYNC (0 << 4)
+#define LVDCTRCR_CTR1SEL_DISP (1 << 4)
+#define LVDCTRCR_CTR1SEL_ODD (2 << 4)
+#define LVDCTRCR_CTR1SEL_CDE (3 << 4)
+#define LVDCTRCR_CTR1SEL_HSYNC (4 << 4)
+#define LVDCTRCR_CTR1SEL_MASK (7 << 4)
+#define LVDCTRCR_CTR0SEL_HSYNC (0 << 0)
+#define LVDCTRCR_CTR0SEL_VSYNC (1 << 0)
+#define LVDCTRCR_CTR0SEL_DISP (2 << 0)
+#define LVDCTRCR_CTR0SEL_ODD (3 << 0)
+#define LVDCTRCR_CTR0SEL_CDE (4 << 0)
+#define LVDCTRCR_CTR0SEL_MASK (7 << 0)
+
+#define LVDCHCR 0x0010
+#define LVDCHCR_CHSEL_CH(n, c) ((((c) - (n)) & 3) << ((n) * 4))
+#define LVDCHCR_CHSEL_MASK(n) (3 << ((n) * 4))
+
+#endif /* __RCAR_LVDS_REGS_H__ */
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