[PATCH v3 15/19] drm: sun4i: Add composite output
Maxime Ripard
maxime.ripard at free-electrons.com
Wed Mar 23 16:38:38 UTC 2016
Some Allwinner SoCs have an IP called the TV encoder that is used to output
composite and VGA signals. In such a case, we need to use the second TCON
channel.
Add support for that TV encoder.
Signed-off-by: Maxime Ripard <maxime.ripard at free-electrons.com>
---
drivers/gpu/drm/sun4i/Makefile | 2 +
drivers/gpu/drm/sun4i/sun4i_tv.c | 621 +++++++++++++++++++++++++++++++++++++++
2 files changed, 623 insertions(+)
create mode 100644 drivers/gpu/drm/sun4i/sun4i_tv.c
diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile
index 830abb9b2b74..c93498f6a795 100644
--- a/drivers/gpu/drm/sun4i/Makefile
+++ b/drivers/gpu/drm/sun4i/Makefile
@@ -9,3 +9,5 @@ sun4i-tcon-y += sun4i_dotclock.o
obj-$(CONFIG_DRM_SUN4I) += sun4i-drm.o sun4i-tcon.o
obj-$(CONFIG_DRM_SUN4I) += sun4i_backend.o
+
+obj-$(CONFIG_DRM_SUN4I) += sun4i_tv.o
diff --git a/drivers/gpu/drm/sun4i/sun4i_tv.c b/drivers/gpu/drm/sun4i/sun4i_tv.c
new file mode 100644
index 000000000000..78634dfc0f77
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun4i_tv.c
@@ -0,0 +1,621 @@
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard at free-electrons.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/component.h>
+#include <linux/of_address.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_panel.h>
+
+#include "sun4i_backend.h"
+#include "sun4i_drv.h"
+#include "sun4i_tcon.h"
+
+#define SUN4I_TVE_EN_REG 0x000
+#define SUN4I_TVE_EN_DAC_MAP_MASK GENMASK(19, 4)
+#define SUN4I_TVE_EN_DAC_MAP(dac, out) (((out) & 0xf) << (dac + 1) * 4)
+#define SUN4I_TVE_EN_ENABLE BIT(0)
+
+#define SUN4I_TVE_CFG0_REG 0x004
+#define SUN4I_TVE_CFG0_DAC_CONTROL_54M BIT(26)
+#define SUN4I_TVE_CFG0_CORE_DATAPATH_54M BIT(25)
+#define SUN4I_TVE_CFG0_CORE_CONTROL_54M BIT(24)
+#define SUN4I_TVE_CFG0_YC_EN BIT(17)
+#define SUN4I_TVE_CFG0_COMP_EN BIT(16)
+#define SUN4I_TVE_CFG0_RES(x) ((x) & 0xf)
+#define SUN4I_TVE_CFG0_RES_480i SUN4I_TVE_CFG0_RES(0)
+#define SUN4I_TVE_CFG0_RES_576i SUN4I_TVE_CFG0_RES(1)
+
+#define SUN4I_TVE_DAC0_REG 0x008
+#define SUN4I_TVE_DAC0_CLOCK_INVERT BIT(24)
+#define SUN4I_TVE_DAC0_LUMA(x) (((x) & 3) << 20)
+#define SUN4I_TVE_DAC0_LUMA_0_4 SUN4I_TVE_DAC0_LUMA(3)
+#define SUN4I_TVE_DAC0_CHROMA(x) (((x) & 3) << 18)
+#define SUN4I_TVE_DAC0_CHROMA_0_75 SUN4I_TVE_DAC0_CHROMA(3)
+#define SUN4I_TVE_DAC0_INTERNAL_DAC(x) (((x) & 3) << 16)
+#define SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS SUN4I_TVE_DAC0_INTERNAL_DAC(3)
+#define SUN4I_TVE_DAC0_DAC_EN(dac) BIT(dac)
+
+#define SUN4I_TVE_NOTCH_REG 0x00c
+#define SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(dac, x) ((4 - (x)) << (dac * 3))
+
+#define SUN4I_TVE_CHROMA_FREQ_REG 0x010
+
+#define SUN4I_TVE_PORCH_REG 0x014
+#define SUN4I_TVE_PORCH_BACK(x) ((x) << 16)
+#define SUN4I_TVE_PORCH_FRONT(x) (x)
+
+#define SUN4I_TVE_LINE_REG 0x01c
+#define SUN4I_TVE_LINE_FIRST(x) ((x) << 16)
+#define SUN4I_TVE_LINE_NUMBER(x) (x)
+
+#define SUN4I_TVE_LEVEL_REG 0x020
+#define SUN4I_TVE_LEVEL_BLANK(x) ((x) << 16)
+#define SUN4I_TVE_LEVEL_BLACK(x) (x)
+
+#define SUN4I_TVE_DAC1_REG 0x024
+#define SUN4I_TVE_DAC1_AMPLITUDE(dac, x) ((x) << (dac * 8))
+
+#define SUN4I_TVE_DETECT_STA_REG 0x038
+#define SUN4I_TVE_DETECT_STA_DAC(dac) BIT((dac * 8))
+#define SUN4I_TVE_DETECT_STA_UNCONNECTED 0
+#define SUN4I_TVE_DETECT_STA_CONNECTED 1
+#define SUN4I_TVE_DETECT_STA_GROUND 2
+
+#define SUN4I_TVE_CB_CR_LVL_REG 0x10c
+#define SUN4I_TVE_CB_CR_LVL_CR_BURST(x) ((x) << 8)
+#define SUN4I_TVE_CB_CR_LVL_CB_BURST(x) (x)
+
+#define SUN4I_TVE_TINT_BURST_PHASE_REG 0x110
+#define SUN4I_TVE_TINT_BURST_PHASE_CHROMA(x) (x)
+
+#define SUN4I_TVE_BURST_WIDTH_REG 0x114
+#define SUN4I_TVE_BURST_WIDTH_BREEZEWAY(x) ((x) << 16)
+#define SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(x) ((x) << 8)
+#define SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(x) (x)
+
+#define SUN4I_TVE_CB_CR_GAIN_REG 0x118
+#define SUN4I_TVE_CB_CR_GAIN_CR(x) ((x) << 8)
+#define SUN4I_TVE_CB_CR_GAIN_CB(x) (x)
+
+#define SUN4I_TVE_SYNC_VBI_REG 0x11c
+#define SUN4I_TVE_SYNC_VBI_SYNC(x) ((x) << 16)
+#define SUN4I_TVE_SYNC_VBI_VBLANK(x) (x)
+
+#define SUN4I_TVE_ACTIVE_LINE_REG 0x124
+#define SUN4I_TVE_ACTIVE_LINE(x) (x)
+
+#define SUN4I_TVE_CHROMA_REG 0x128
+#define SUN4I_TVE_CHROMA_COMP_GAIN(x) ((x) & 3)
+#define SUN4I_TVE_CHROMA_COMP_GAIN_50 SUN4I_TVE_CHROMA_COMP_GAIN(2)
+
+#define SUN4I_TVE_12C_REG 0x12c
+#define SUN4I_TVE_12C_NOTCH_WIDTH_WIDE BIT(8)
+#define SUN4I_TVE_12C_COMP_YUV_EN BIT(0)
+
+#define SUN4I_TVE_RESYNC_REG 0x130
+#define SUN4I_TVE_RESYNC_FIELD BIT(31)
+#define SUN4I_TVE_RESYNC_LINE(x) ((x) << 16)
+#define SUN4I_TVE_RESYNC_PIXEL(x) (x)
+
+#define SUN4I_TVE_SLAVE_REG 0x134
+
+#define SUN4I_TVE_WSS_DATA2_REG 0x244
+
+struct color_gains {
+ u16 cb;
+ u16 cr;
+};
+
+struct burst_levels {
+ u16 cb;
+ u16 cr;
+};
+
+struct video_levels {
+ u16 black;
+ u16 blank;
+};
+
+struct resync_parameters {
+ bool field;
+ u16 line;
+ u16 pixel;
+};
+
+struct tv_mode {
+ char *name;
+
+ u32 mode;
+ u32 chroma_freq;
+ u16 back_porch;
+ u16 front_porch;
+ u16 line_number;
+ u16 vblank_level;
+
+ u32 hdisplay;
+ u16 hfront_porch;
+ u16 hsync_len;
+ u16 hback_porch;
+
+ u32 vdisplay;
+ u16 vfront_porch;
+ u16 vsync_len;
+ u16 vback_porch;
+
+ bool yc_en;
+ bool dac3_en;
+ bool dac_bit25_en;
+
+ struct color_gains *color_gains;
+ struct burst_levels *burst_levels;
+ struct video_levels *video_levels;
+ struct resync_parameters *resync_params;
+};
+
+struct sun4i_tv {
+ struct drm_connector connector;
+ struct drm_encoder encoder;
+
+ struct clk *clk;
+ struct regmap *regs;
+ struct reset_control *reset;
+
+ struct sun4i_drv *drv;
+};
+
+struct tv_mode tv_modes[] = {
+};
+
+static inline struct sun4i_tv *
+drm_encoder_to_sun4i_tv(struct drm_encoder *encoder)
+{
+ return container_of(encoder, struct sun4i_tv,
+ encoder);
+}
+
+static inline struct sun4i_tv *
+drm_connector_to_sun4i_tv(struct drm_connector *connector)
+{
+ return container_of(connector, struct sun4i_tv,
+ connector);
+}
+
+/*
+ * FIXME: If only the drm_display_mode private field was usable, this
+ * could go away...
+ *
+ * So far, it doesn't seem to be preserved when the mode is passed by
+ * to mode_set for some reason.
+ */
+static struct tv_mode *sun4i_tv_find_tv_by_mode(struct drm_display_mode *mode)
+{
+ int i;
+
+ /* First try to identify the mode by name */
+ for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
+ struct tv_mode *tv_mode = &tv_modes[i];
+
+ DRM_DEBUG_DRIVER("Comparing mode %s vs %s",
+ mode->name, tv_mode->name);
+
+ if (!strcmp(mode->name, tv_mode->name))
+ return tv_mode;
+ }
+
+ /* Then by number of lines */
+ for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
+ struct tv_mode *tv_mode = &tv_modes[i];
+
+ DRM_DEBUG_DRIVER("Comparing mode %s vs %s (X: %d vs %d)",
+ mode->name, tv_mode->name,
+ mode->vdisplay, tv_mode->vdisplay);
+
+ if (mode->vdisplay == tv_mode->vdisplay)
+ return tv_mode;
+ }
+
+ return NULL;
+}
+
+static void sun4i_tv_mode_to_drm_mode(struct tv_mode *tv_mode,
+ struct drm_display_mode *mode)
+{
+ DRM_DEBUG_DRIVER("Creating mode %s\n", mode->name);
+
+ mode->type = DRM_MODE_TYPE_DRIVER;
+ mode->clock = 13500;
+ mode->flags = DRM_MODE_FLAG_INTERLACE;
+
+ mode->hdisplay = tv_mode->hdisplay;
+ mode->hsync_start = mode->hdisplay + tv_mode->hfront_porch;
+ mode->hsync_end = mode->hsync_start + tv_mode->hsync_len;
+ mode->htotal = mode->hsync_end + tv_mode->hback_porch;
+
+ mode->vdisplay = tv_mode->vdisplay;
+ mode->vsync_start = mode->vdisplay + tv_mode->vfront_porch;
+ mode->vsync_end = mode->vsync_start + tv_mode->vsync_len;
+ mode->vtotal = mode->vsync_end + tv_mode->vback_porch;
+}
+
+static int sun4i_tv_atomic_check(struct drm_encoder *encoder,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ return 0;
+}
+
+static void sun4i_tv_disable(struct drm_encoder *encoder)
+{
+ struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
+ struct sun4i_drv *drv = tv->drv;
+ struct sun4i_tcon *tcon = drv->tcon;
+
+ DRM_DEBUG_DRIVER("Disabling the TV Output\n");
+
+ sun4i_tcon_channel_disable(tcon, 1);
+
+ regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
+ SUN4I_TVE_EN_ENABLE,
+ 0);
+ sun4i_backend_disable_color_correction(drv->backend);
+}
+
+static void sun4i_tv_enable(struct drm_encoder *encoder)
+{
+ struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
+ struct sun4i_drv *drv = tv->drv;
+ struct sun4i_tcon *tcon = drv->tcon;
+
+ DRM_DEBUG_DRIVER("Enabling the TV Output\n");
+
+ sun4i_backend_apply_color_correction(drv->backend);
+
+ regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
+ SUN4I_TVE_EN_ENABLE,
+ SUN4I_TVE_EN_ENABLE);
+
+ sun4i_tcon_channel_enable(tcon, 1);
+}
+
+static void sun4i_tv_mode_set(struct drm_encoder *encoder,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
+ struct sun4i_drv *drv = tv->drv;
+ struct sun4i_tcon *tcon = drv->tcon;
+ struct tv_mode *tv_mode = sun4i_tv_find_tv_by_mode(mode);
+
+ sun4i_tcon1_mode_set(tcon, mode);
+
+ /* Enable and map the DAC to the output */
+ regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
+ SUN4I_TVE_EN_DAC_MAP_MASK,
+ SUN4I_TVE_EN_DAC_MAP(0, 1) |
+ SUN4I_TVE_EN_DAC_MAP(1, 2) |
+ SUN4I_TVE_EN_DAC_MAP(2, 3) |
+ SUN4I_TVE_EN_DAC_MAP(3, 4));
+
+ /* Set PAL settings */
+ regmap_write(tv->regs, SUN4I_TVE_CFG0_REG,
+ tv_mode->mode |
+ (tv_mode->yc_en ? SUN4I_TVE_CFG0_YC_EN : 0) |
+ SUN4I_TVE_CFG0_COMP_EN |
+ SUN4I_TVE_CFG0_DAC_CONTROL_54M |
+ SUN4I_TVE_CFG0_CORE_DATAPATH_54M |
+ SUN4I_TVE_CFG0_CORE_CONTROL_54M);
+
+ /* Configure the DAC for a composite output */
+ regmap_write(tv->regs, SUN4I_TVE_DAC0_REG,
+ SUN4I_TVE_DAC0_DAC_EN(0) |
+ (tv_mode->dac3_en ? SUN4I_TVE_DAC0_DAC_EN(3) : 0) |
+ SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS |
+ SUN4I_TVE_DAC0_CHROMA_0_75 |
+ SUN4I_TVE_DAC0_LUMA_0_4 |
+ SUN4I_TVE_DAC0_CLOCK_INVERT |
+ (tv_mode->dac_bit25_en ? BIT(25) : 0) |
+ BIT(30));
+
+ /* Configure the sample delay between DAC0 and the other DAC */
+ regmap_write(tv->regs, SUN4I_TVE_NOTCH_REG,
+ SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(1, 0) |
+ SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(2, 0));
+
+ regmap_write(tv->regs, SUN4I_TVE_CHROMA_FREQ_REG,
+ tv_mode->chroma_freq);
+
+ /* Set the front and back porch */
+ regmap_write(tv->regs, SUN4I_TVE_PORCH_REG,
+ SUN4I_TVE_PORCH_BACK(tv_mode->back_porch) |
+ SUN4I_TVE_PORCH_FRONT(tv_mode->front_porch));
+
+ /* Set the lines setup */
+ regmap_write(tv->regs, SUN4I_TVE_LINE_REG,
+ SUN4I_TVE_LINE_FIRST(22) |
+ SUN4I_TVE_LINE_NUMBER(tv_mode->line_number));
+
+ regmap_write(tv->regs, SUN4I_TVE_LEVEL_REG,
+ SUN4I_TVE_LEVEL_BLANK(tv_mode->video_levels->blank) |
+ SUN4I_TVE_LEVEL_BLACK(tv_mode->video_levels->black));
+
+ regmap_write(tv->regs, SUN4I_TVE_DAC1_REG,
+ SUN4I_TVE_DAC1_AMPLITUDE(0, 0x18) |
+ SUN4I_TVE_DAC1_AMPLITUDE(1, 0x18) |
+ SUN4I_TVE_DAC1_AMPLITUDE(2, 0x18) |
+ SUN4I_TVE_DAC1_AMPLITUDE(3, 0x18));
+
+ regmap_write(tv->regs, SUN4I_TVE_CB_CR_LVL_REG,
+ SUN4I_TVE_CB_CR_LVL_CB_BURST(tv_mode->burst_levels->cb) |
+ SUN4I_TVE_CB_CR_LVL_CR_BURST(tv_mode->burst_levels->cr));
+
+ /* Set burst width for a composite output */
+ regmap_write(tv->regs, SUN4I_TVE_BURST_WIDTH_REG,
+ SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(126) |
+ SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(68) |
+ SUN4I_TVE_BURST_WIDTH_BREEZEWAY(22));
+
+ regmap_write(tv->regs, SUN4I_TVE_CB_CR_GAIN_REG,
+ SUN4I_TVE_CB_CR_GAIN_CB(tv_mode->color_gains->cb) |
+ SUN4I_TVE_CB_CR_GAIN_CR(tv_mode->color_gains->cr));
+
+ regmap_write(tv->regs, SUN4I_TVE_SYNC_VBI_REG,
+ SUN4I_TVE_SYNC_VBI_SYNC(0x10) |
+ SUN4I_TVE_SYNC_VBI_VBLANK(tv_mode->vblank_level));
+
+ regmap_write(tv->regs, SUN4I_TVE_ACTIVE_LINE_REG,
+ SUN4I_TVE_ACTIVE_LINE(1440));
+
+ /* Set composite chroma gain to 50 % */
+ regmap_write(tv->regs, SUN4I_TVE_CHROMA_REG,
+ SUN4I_TVE_CHROMA_COMP_GAIN_50);
+
+ regmap_write(tv->regs, SUN4I_TVE_12C_REG,
+ SUN4I_TVE_12C_COMP_YUV_EN |
+ SUN4I_TVE_12C_NOTCH_WIDTH_WIDE);
+
+ regmap_write(tv->regs, SUN4I_TVE_RESYNC_REG,
+ SUN4I_TVE_RESYNC_PIXEL(tv_mode->resync_params->pixel) |
+ SUN4I_TVE_RESYNC_LINE(tv_mode->resync_params->line) |
+ (tv_mode->resync_params->field ?
+ SUN4I_TVE_RESYNC_FIELD : 0));
+
+ regmap_write(tv->regs, SUN4I_TVE_SLAVE_REG, 0);
+
+ clk_set_rate(tcon->sclk1, mode->crtc_clock * 1000);
+}
+
+static struct drm_encoder_helper_funcs sun4i_tv_helper_funcs = {
+ .atomic_check = sun4i_tv_atomic_check,
+ .disable = sun4i_tv_disable,
+ .enable = sun4i_tv_enable,
+ .mode_set = sun4i_tv_mode_set,
+};
+
+static void sun4i_tv_destroy(struct drm_encoder *encoder)
+{
+ drm_encoder_cleanup(encoder);
+}
+
+static struct drm_encoder_funcs sun4i_tv_funcs = {
+ .destroy = sun4i_tv_destroy,
+};
+
+static int sun4i_tv_comp_get_modes(struct drm_connector *connector)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
+ struct drm_display_mode *mode = drm_mode_create(connector->dev);
+ struct tv_mode *tv_mode = &tv_modes[i];
+
+ strcpy(mode->name, tv_mode->name);
+
+ sun4i_tv_mode_to_drm_mode(tv_mode, mode);
+ drm_mode_probed_add(connector, mode);
+ }
+
+ return i;
+}
+
+static int sun4i_tv_comp_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ /* TODO */
+ return MODE_OK;
+}
+
+static struct drm_encoder *
+sun4i_tv_comp_best_encoder(struct drm_connector *connector)
+{
+ struct sun4i_tv *tv = drm_connector_to_sun4i_tv(connector);
+
+ return &tv->encoder;
+}
+
+static struct drm_connector_helper_funcs sun4i_tv_comp_connector_helper_funcs = {
+ .get_modes = sun4i_tv_comp_get_modes,
+ .mode_valid = sun4i_tv_comp_mode_valid,
+ .best_encoder = sun4i_tv_comp_best_encoder,
+};
+
+static enum drm_connector_status
+sun4i_tv_comp_connector_detect(struct drm_connector *connector, bool force)
+{
+ return connector_status_connected;
+}
+
+static void
+sun4i_tv_comp_connector_destroy(struct drm_connector *connector)
+{
+ drm_connector_cleanup(connector);
+}
+
+static struct drm_connector_funcs sun4i_tv_comp_connector_funcs = {
+ .dpms = drm_atomic_helper_connector_dpms,
+ .detect = sun4i_tv_comp_connector_detect,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = sun4i_tv_comp_connector_destroy,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static struct regmap_config sun4i_tv_regmap_config = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+ .max_register = SUN4I_TVE_WSS_DATA2_REG,
+ .name = "tv-encoder",
+};
+
+static int sun4i_tv_bind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct drm_device *drm = data;
+ struct sun4i_drv *drv = drm->dev_private;
+ struct sun4i_tv *tv;
+ struct resource *res;
+ void __iomem *regs;
+ int ret;
+
+ tv = devm_kzalloc(dev, sizeof(*tv), GFP_KERNEL);
+ if (!tv)
+ return -ENOMEM;
+ tv->drv = drv;
+ dev_set_drvdata(dev, tv);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ regs = devm_ioremap_resource(dev, res);
+ if (IS_ERR(regs)) {
+ dev_err(dev, "Couldn't map the TV encoder registers\n");
+ return PTR_ERR(regs);
+ }
+
+ tv->regs = devm_regmap_init_mmio(dev, regs,
+ &sun4i_tv_regmap_config);
+ if (IS_ERR(tv->regs)) {
+ dev_err(dev, "Couldn't create the TV encoder regmap\n");
+ return PTR_ERR(tv->regs);
+ }
+
+ tv->reset = devm_reset_control_get(dev, NULL);
+ if (IS_ERR(tv->reset)) {
+ dev_err(dev, "Couldn't get our reset line\n");
+ return PTR_ERR(tv->reset);
+ }
+
+ ret = reset_control_deassert(tv->reset);
+ if (ret) {
+ dev_err(dev, "Couldn't deassert our reset line\n");
+ return ret;
+ }
+
+ tv->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(tv->clk)) {
+ dev_err(dev, "Couldn't get the TV encoder clock\n");
+ ret = PTR_ERR(tv->clk);
+ goto err_assert_reset;
+ }
+ clk_prepare_enable(tv->clk);
+
+ drm_encoder_helper_add(&tv->encoder,
+ &sun4i_tv_helper_funcs);
+ ret = drm_encoder_init(drm,
+ &tv->encoder,
+ &sun4i_tv_funcs,
+ DRM_MODE_ENCODER_TVDAC,
+ NULL);
+ if (ret) {
+ dev_err(dev, "Couldn't initialise the TV encoder\n");
+ goto err_disable_clk;
+ }
+
+ tv->encoder.possible_crtcs = BIT(0);
+
+ drm_connector_helper_add(&tv->connector,
+ &sun4i_tv_comp_connector_helper_funcs);
+ ret = drm_connector_init(drm, &tv->connector,
+ &sun4i_tv_comp_connector_funcs,
+ DRM_MODE_CONNECTOR_Composite);
+ if (ret) {
+ dev_err(dev,
+ "Couldn't initialise the Composite connector\n");
+ goto err_cleanup_connector;
+ }
+ tv->connector.interlace_allowed = true;
+
+ drm_mode_connector_attach_encoder(&tv->connector, &tv->encoder);
+
+ return 0;
+
+err_cleanup_connector:
+ drm_encoder_cleanup(&tv->encoder);
+err_disable_clk:
+ clk_disable_unprepare(tv->clk);
+err_assert_reset:
+ reset_control_assert(tv->reset);
+ return ret;
+}
+
+static void sun4i_tv_unbind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct sun4i_tv *tv = dev_get_drvdata(dev);
+
+ drm_connector_cleanup(&tv->connector);
+ drm_encoder_cleanup(&tv->encoder);
+ clk_disable_unprepare(tv->clk);
+}
+
+static struct component_ops sun4i_tv_ops = {
+ .bind = sun4i_tv_bind,
+ .unbind = sun4i_tv_unbind,
+};
+
+static int sun4i_tv_probe(struct platform_device *pdev)
+{
+ return component_add(&pdev->dev, &sun4i_tv_ops);
+}
+
+static int sun4i_tv_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &sun4i_tv_ops);
+
+ return 0;
+}
+
+static const struct of_device_id sun4i_tv_of_table[] = {
+ { .compatible = "allwinner,sun4i-a10-tv-encoder" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, sun4i_tv_of_table);
+
+static struct platform_driver sun4i_tv_platform_driver = {
+ .probe = sun4i_tv_probe,
+ .remove = sun4i_tv_remove,
+ .driver = {
+ .name = "sun4i-tve",
+ .of_match_table = sun4i_tv_of_table,
+ },
+};
+module_platform_driver(sun4i_tv_platform_driver);
+
+MODULE_AUTHOR("Maxime Ripard <maxime.ripard at free-electrons.com>");
+MODULE_DESCRIPTION("Allwinner A10 TV Encoder Driver");
+MODULE_LICENSE("GPL");
--
2.7.3
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