drm/radeon/kms: add support for external tmds on legacy boards

This enables initialization of external tmds chips on pre-atom
and mac systems.  Macs are untested.  Also, some macs have single
link tmds chips while others have dual link tmds chips.  We need
to figure out which ones have which.

This gets external TMDS working on my RS485 and RV380.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

5 files changed, 456 insertions, 52 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c
index e2a51de67aa1..f745971c6a53 100644
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -993,8 +993,8 @@ static const struct radeon_tmds_pll default_tmds_pll[CHIP_LAST][4] = {
         {{0xffffffff, 0xb01cb}, {0, 0}, {0, 0}, {0, 0}},        /* CHIP_R420  */
         {{0xffffffff, 0xb01cb}, {0, 0}, {0, 0}, {0, 0}},        /* CHIP_R423  */
         {{0xffffffff, 0xb01cb}, {0, 0}, {0, 0}, {0, 0}},        /* CHIP_RV410 */
-        {{15000, 0xb0155}, {0xffffffff, 0xb01cb}, {0, 0}, {0, 0}},      /* CHIP_RS400 */
-        {{15000, 0xb0155}, {0xffffffff, 0xb01cb}, {0, 0}, {0, 0}},      /* CHIP_RS480 */
+        { {0, 0}, {0, 0}, {0, 0}, {0, 0} },     /* CHIP_RS400 */
+        { {0, 0}, {0, 0}, {0, 0}, {0, 0} },     /* CHIP_RS480 */
 };
 
 bool radeon_legacy_get_tmds_info_from_table(struct radeon_encoder *encoder,
@@ -1028,7 +1028,6 @@ bool radeon_legacy_get_tmds_info_from_combios(struct radeon_encoder *encoder,
         tmds_info = combios_get_table_offset(dev, COMBIOS_DFP_INFO_TABLE);
 
         if (tmds_info) {
-
                 ver = RBIOS8(tmds_info);
                 DRM_INFO("DFP table revision: %d\n", ver);
                 if (ver == 3) {
@@ -1063,45 +1062,132 @@ bool radeon_legacy_get_tmds_info_from_combios(struct radeon_encoder *encoder,
                                           tmds->tmds_pll[i].value);
                         }
                 }
-        } else
+        } else {
                 DRM_INFO("No TMDS info found in BIOS\n");
+                return false;
+        }
         return true;
 }
 
-struct radeon_encoder_int_tmds *radeon_combios_get_tmds_info(struct radeon_encoder *encoder)
+bool radeon_legacy_get_ext_tmds_info_from_table(struct radeon_encoder *encoder,
+                                                struct radeon_encoder_ext_tmds *tmds)
 {
-        struct radeon_encoder_int_tmds *tmds = NULL;
-        bool ret;
-
-        tmds = kzalloc(sizeof(struct radeon_encoder_int_tmds), GFP_KERNEL);
+        struct drm_device *dev = encoder->base.dev;
+        struct radeon_device *rdev = dev->dev_private;
+        struct radeon_i2c_bus_rec i2c_bus;
 
-        if (!tmds)
-                return NULL;
+        /* default for macs */
+        i2c_bus = combios_setup_i2c_bus(RADEON_GPIO_MONID);
+        tmds->i2c_bus = radeon_i2c_create(dev, &i2c_bus, "DVO");
 
-        ret = radeon_legacy_get_tmds_info_from_combios(encoder, tmds);
-        if (ret == false)
-                radeon_legacy_get_tmds_info_from_table(encoder, tmds);
+        /* XXX some macs have duallink chips */
+        switch (rdev->mode_info.connector_table) {
+        case CT_POWERBOOK_EXTERNAL:
+        case CT_MINI_EXTERNAL:
+        default:
+                tmds->dvo_chip = DVO_SIL164;
+                tmds->slave_addr = 0x70 >> 1; /* 7 bit addressing */
+                break;
+        }
 
-        return tmds;
+        return true;
 }
 
-void radeon_combios_get_ext_tmds_info(struct radeon_encoder *encoder)
+bool radeon_legacy_get_ext_tmds_info_from_combios(struct radeon_encoder *encoder,
+                                                  struct radeon_encoder_ext_tmds *tmds)
 {
         struct drm_device *dev = encoder->base.dev;
         struct radeon_device *rdev = dev->dev_private;
-        uint16_t ext_tmds_info;
-        uint8_t ver;
+        uint16_t offset;
+        uint8_t ver, id, blocks, clk, data;
+        int i;
+        enum radeon_combios_ddc gpio;
+        struct radeon_i2c_bus_rec i2c_bus;
 
         if (rdev->bios == NULL)
-                return;
+                return false;
 
-        ext_tmds_info =
-            combios_get_table_offset(dev, COMBIOS_EXT_TMDS_INFO_TABLE);
-        if (ext_tmds_info) {
-                ver = RBIOS8(ext_tmds_info);
-                DRM_INFO("External TMDS Table revision: %d\n", ver);
-                // TODO
+        tmds->i2c_bus = NULL;
+        if (rdev->flags & RADEON_IS_IGP) {
+                offset = combios_get_table_offset(dev, COMBIOS_I2C_INFO_TABLE);
+                if (offset) {
+                        ver = RBIOS8(offset);
+                        DRM_INFO("GPIO Table revision: %d\n", ver);
+                        blocks = RBIOS8(offset + 2);
+                        for (i = 0; i < blocks; i++) {
+                                id = RBIOS8(offset + 3 + (i * 5) + 0);
+                                if (id == 136) {
+                                        clk = RBIOS8(offset + 3 + (i * 5) + 3);
+                                        data = RBIOS8(offset + 3 + (i * 5) + 4);
+                                        i2c_bus.valid = true;
+                                        i2c_bus.mask_clk_mask = (1 << clk);
+                                        i2c_bus.mask_data_mask = (1 << data);
+                                        i2c_bus.a_clk_mask = (1 << clk);
+                                        i2c_bus.a_data_mask = (1 << data);
+                                        i2c_bus.en_clk_mask = (1 << clk);
+                                        i2c_bus.en_data_mask = (1 << data);
+                                        i2c_bus.y_clk_mask = (1 << clk);
+                                        i2c_bus.y_data_mask = (1 << data);
+                                        i2c_bus.mask_clk_reg = RADEON_GPIOPAD_MASK;
+                                        i2c_bus.mask_data_reg = RADEON_GPIOPAD_MASK;
+                                        i2c_bus.a_clk_reg = RADEON_GPIOPAD_A;
+                                        i2c_bus.a_data_reg = RADEON_GPIOPAD_A;
+                                        i2c_bus.en_clk_reg = RADEON_GPIOPAD_EN;
+                                        i2c_bus.en_data_reg = RADEON_GPIOPAD_EN;
+                                        i2c_bus.y_clk_reg = RADEON_GPIOPAD_Y;
+                                        i2c_bus.y_data_reg = RADEON_GPIOPAD_Y;
+                                        tmds->i2c_bus = radeon_i2c_create(dev, &i2c_bus, "DVO");
+                                        tmds->dvo_chip = DVO_SIL164;
+                                        tmds->slave_addr = 0x70 >> 1; /* 7 bit addressing */
+                                        break;
+                                }
+                        }
+                }
+        } else {
+                offset = combios_get_table_offset(dev, COMBIOS_EXT_TMDS_INFO_TABLE);
+                if (offset) {
+                        ver = RBIOS8(offset);
+                        DRM_INFO("External TMDS Table revision: %d\n", ver);
+                        tmds->slave_addr = RBIOS8(offset + 4 + 2);
+                        tmds->slave_addr >>= 1; /* 7 bit addressing */
+                        gpio = RBIOS8(offset + 4 + 3);
+                        switch (gpio) {
+                        case DDC_MONID:
+                                i2c_bus = combios_setup_i2c_bus(RADEON_GPIO_MONID);
+                                tmds->i2c_bus = radeon_i2c_create(dev, &i2c_bus, "DVO");
+                                break;
+                        case DDC_DVI:
+                                i2c_bus = combios_setup_i2c_bus(RADEON_GPIO_DVI_DDC);
+                                tmds->i2c_bus = radeon_i2c_create(dev, &i2c_bus, "DVO");
+                                break;
+                        case DDC_VGA:
+                                i2c_bus = combios_setup_i2c_bus(RADEON_GPIO_VGA_DDC);
+                                tmds->i2c_bus = radeon_i2c_create(dev, &i2c_bus, "DVO");
+                                break;
+                        case DDC_CRT2:
+                                /* R3xx+ chips don't have GPIO_CRT2_DDC gpio pad */
+                                if (rdev->family >= CHIP_R300)
+                                        i2c_bus = combios_setup_i2c_bus(RADEON_GPIO_MONID);
+                                else
+                                        i2c_bus = combios_setup_i2c_bus(RADEON_GPIO_CRT2_DDC);
+                                tmds->i2c_bus = radeon_i2c_create(dev, &i2c_bus, "DVO");
+                                break;
+                        case DDC_LCD: /* MM i2c */
+                                DRM_ERROR("MM i2c requires hw i2c engine\n");
+                                break;
+                        default:
+                                DRM_ERROR("Unsupported gpio %d\n", gpio);
+                                break;
+                        }
+                }
         }
+
+        if (!tmds->i2c_bus) {
+                DRM_INFO("No valid Ext TMDS info found in BIOS\n");
+                return false;
+        }
+
+        return true;
 }
 
 bool radeon_get_legacy_connector_info_from_table(struct drm_device *dev)
@@ -1577,10 +1663,15 @@ static bool radeon_apply_legacy_quirks(struct drm_device *dev,
                 ddc_i2c->a_data_reg = RADEON_GPIOPAD_A;
                 ddc_i2c->en_clk_reg = RADEON_GPIOPAD_EN;
                 ddc_i2c->en_data_reg = RADEON_GPIOPAD_EN;
-                ddc_i2c->y_clk_reg = RADEON_LCD_GPIO_Y_REG;
-                ddc_i2c->y_data_reg = RADEON_LCD_GPIO_Y_REG;
+                ddc_i2c->y_clk_reg = RADEON_GPIOPAD_Y;
+                ddc_i2c->y_data_reg = RADEON_GPIOPAD_Y;
         }
 
+        /* R3xx+ chips don't have GPIO_CRT2_DDC gpio pad */
+        if ((rdev->family >= CHIP_R300) &&
+            ddc_i2c->mask_clk_reg == RADEON_GPIO_CRT2_DDC)
+                *ddc_i2c = combios_setup_i2c_bus(RADEON_GPIO_DVI_DDC);
+
         /* Certain IBM chipset RN50s have a BIOS reporting two VGAs,
            one with VGA DDC and one with CRT2 DDC. - kill the CRT2 DDC one */
         if (dev->pdev->device == 0x515e &&
@@ -2014,6 +2105,193 @@ bool radeon_get_legacy_connector_info_from_bios(struct drm_device *dev)
         return true;
 }
 
+void radeon_external_tmds_setup(struct drm_encoder *encoder)
+{
+        struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+        struct radeon_encoder_ext_tmds *tmds = radeon_encoder->enc_priv;
+
+        if (!tmds)
+                return;
+
+        switch (tmds->dvo_chip) {
+        case DVO_SIL164:
+                /* sil 164 */
+                radeon_i2c_do_lock(tmds->i2c_bus, 1);
+                radeon_i2c_sw_put_byte(tmds->i2c_bus,
+                                       tmds->slave_addr,
+                                       0x08, 0x30);
+                radeon_i2c_sw_put_byte(tmds->i2c_bus,
+                                       tmds->slave_addr,
+                                       0x09, 0x00);
+                radeon_i2c_sw_put_byte(tmds->i2c_bus,
+                                       tmds->slave_addr,
+                                       0x0a, 0x90);
+                radeon_i2c_sw_put_byte(tmds->i2c_bus,
+                                       tmds->slave_addr,
+                                       0x0c, 0x89);
+                radeon_i2c_sw_put_byte(tmds->i2c_bus,
+                                       tmds->slave_addr,
+                                       0x08, 0x3b);
+                radeon_i2c_do_lock(tmds->i2c_bus, 0);
+                break;
+        case DVO_SIL1178:
+                /* sil 1178 - untested */
+                /*
+                 * 0x0f, 0x44
+                 * 0x0f, 0x4c
+                 * 0x0e, 0x01
+                 * 0x0a, 0x80
+                 * 0x09, 0x30
+                 * 0x0c, 0xc9
+                 * 0x0d, 0x70
+                 * 0x08, 0x32
+                 * 0x08, 0x33
+                 */
+                break;
+        default:
+                break;
+        }
+
+}
+
+bool radeon_combios_external_tmds_setup(struct drm_encoder *encoder)
+{
+        struct drm_device *dev = encoder->dev;
+        struct radeon_device *rdev = dev->dev_private;
+        struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+        uint16_t offset;
+        uint8_t blocks, slave_addr, rev;
+        uint32_t index, id;
+        uint32_t reg, val, and_mask, or_mask;
+        struct radeon_encoder_ext_tmds *tmds = radeon_encoder->enc_priv;
+
+        if (rdev->bios == NULL)
+                return false;
+
+        if (!tmds)
+                return false;
+
+        if (rdev->flags & RADEON_IS_IGP) {
+                offset = combios_get_table_offset(dev, COMBIOS_TMDS_POWER_ON_TABLE);
+                rev = RBIOS8(offset);
+                if (offset) {
+                        rev = RBIOS8(offset);
+                        if (rev > 1) {
+                                blocks = RBIOS8(offset + 3);
+                                index = offset + 4;
+                                while (blocks > 0) {
+                                        id = RBIOS16(index);
+                                        index += 2;
+                                        switch (id >> 13) {
+                                        case 0:
+                                                reg = (id & 0x1fff) * 4;
+                                                val = RBIOS32(index);
+                                                index += 4;
+                                                WREG32(reg, val);
+                                                break;
+                                        case 2:
+                                                reg = (id & 0x1fff) * 4;
+                                                and_mask = RBIOS32(index);
+                                                index += 4;
+                                                or_mask = RBIOS32(index);
+                                                index += 4;
+                                                val = RREG32(reg);
+                                                val = (val & and_mask) | or_mask;
+                                                WREG32(reg, val);
+                                                break;
+                                        case 3:
+                                                val = RBIOS16(index);
+                                                index += 2;
+                                                udelay(val);
+                                                break;
+                                        case 4:
+                                                val = RBIOS16(index);
+                                                index += 2;
+                                                udelay(val * 1000);
+                                                break;
+                                        case 6:
+                                                slave_addr = id & 0xff;
+                                                slave_addr >>= 1; /* 7 bit addressing */
+                                                index++;
+                                                reg = RBIOS8(index);
+                                                index++;
+                                                val = RBIOS8(index);
+                                                index++;
+                                                radeon_i2c_do_lock(tmds->i2c_bus, 1);
+                                                radeon_i2c_sw_put_byte(tmds->i2c_bus,
+                                                                       slave_addr,
+                                                                       reg, val);
+                                                radeon_i2c_do_lock(tmds->i2c_bus, 0);
+                                                break;
+                                        default:
+                                                DRM_ERROR("Unknown id %d\n", id >> 13);
+                                                break;
+                                        }
+                                        blocks--;
+                                }
+                                return true;
+                        }
+                }
+        } else {
+                offset = combios_get_table_offset(dev, COMBIOS_EXT_TMDS_INFO_TABLE);
+                if (offset) {
+                        index = offset + 10;
+                        id = RBIOS16(index);
+                        while (id != 0xffff) {
+                                index += 2;
+                                switch (id >> 13) {
+                                case 0:
+                                        reg = (id & 0x1fff) * 4;
+                                        val = RBIOS32(index);
+                                        WREG32(reg, val);
+                                        break;
+                                case 2:
+                                        reg = (id & 0x1fff) * 4;
+                                        and_mask = RBIOS32(index);
+                                        index += 4;
+                                        or_mask = RBIOS32(index);
+                                        index += 4;
+                                        val = RREG32(reg);
+                                        val = (val & and_mask) | or_mask;
+                                        WREG32(reg, val);
+                                        break;
+                                case 4:
+                                        val = RBIOS16(index);
+                                        index += 2;
+                                        udelay(val);
+                                        break;
+                                case 5:
+                                        reg = id & 0x1fff;
+                                        and_mask = RBIOS32(index);
+                                        index += 4;
+                                        or_mask = RBIOS32(index);
+                                        index += 4;
+                                        val = RREG32_PLL(reg);
+                                        val = (val & and_mask) | or_mask;
+                                        WREG32_PLL(reg, val);
+                                        break;
+                                case 6:
+                                        reg = id & 0x1fff;
+                                        val = RBIOS8(index);
+                                        index += 1;
+                                        radeon_i2c_do_lock(tmds->i2c_bus, 1);
+                                        radeon_i2c_sw_put_byte(tmds->i2c_bus,
+                                                               tmds->slave_addr,
+                                                               reg, val);
+                                        radeon_i2c_do_lock(tmds->i2c_bus, 0);
+                                        break;
+                                default:
+                                        DRM_ERROR("Unknown id %d\n", id >> 13);
+                                        break;
+                                }
+                                id = RBIOS16(index);
+                        }
+                        return true;
+                }
+        }
+        return false;
+}
+
 static void combios_parse_mmio_table(struct drm_device *dev, uint16_t offset)
 {
         struct radeon_device *rdev = dev->dev_private;
diff --git a/drivers/gpu/drm/radeon/radeon_i2c.c b/drivers/gpu/drm/radeon/radeon_i2c.c
index e97a3912d99f..6c645fb4dad8 100644
--- a/drivers/gpu/drm/radeon/radeon_i2c.c
+++ b/drivers/gpu/drm/radeon/radeon_i2c.c
@@ -212,3 +212,59 @@ struct drm_encoder *radeon_best_encoder(struct drm_connector *connector)
 {
         return NULL;
 }
+
+void radeon_i2c_sw_get_byte(struct radeon_i2c_chan *i2c_bus,
+                            u8 slave_addr,
+                            u8 addr,
+                            u8 *val)
+{
+        u8 out_buf[2];
+        u8 in_buf[2];
+        struct i2c_msg msgs[] = {
+                {
+                        .addr = slave_addr,
+                        .flags = 0,
+                        .len = 1,
+                        .buf = out_buf,
+                },
+                {
+                        .addr = slave_addr,
+                        .flags = I2C_M_RD,
+                        .len = 1,
+                        .buf = in_buf,
+                }
+        };
+
+        out_buf[0] = addr;
+        out_buf[1] = 0;
+
+        if (i2c_transfer(&i2c_bus->adapter, msgs, 2) == 2) {
+                *val = in_buf[0];
+                DRM_DEBUG("val = 0x%02x\n", *val);
+        } else {
+                DRM_ERROR("i2c 0x%02x 0x%02x read failed\n",
+                          addr, *val);
+        }
+}
+
+void radeon_i2c_sw_put_byte(struct radeon_i2c_chan *i2c_bus,
+                            u8 slave_addr,
+                            u8 addr,
+                            u8 val)
+{
+        uint8_t out_buf[2];
+        struct i2c_msg msg = {
+                .addr = slave_addr,
+                .flags = 0,
+                .len = 2,
+                .buf = out_buf,
+        };
+
+        out_buf[0] = addr;
+        out_buf[1] = val;
+
+        if (i2c_transfer(&i2c_bus->adapter, &msg, 1) != 1)
+                DRM_ERROR("i2c 0x%02x 0x%02x write failed\n",
+                          addr, val);
+}
+
diff --git a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
index 00382122869b..2670a9e6502f 100644
--- a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
@@ -697,6 +697,8 @@ static void radeon_legacy_tmds_ext_mode_set(struct drm_encoder *encoder,
                         /*if (mode->clock > 165000)
                           fp2_gen_cntl |= R300_FP2_DVO_DUAL_CHANNEL_EN;*/
                 }
+                if (!radeon_combios_external_tmds_setup(encoder))
+                        radeon_external_tmds_setup(encoder);
         }
 
         if (radeon_crtc->crtc_id == 0) {
@@ -724,6 +726,19 @@ static void radeon_legacy_tmds_ext_mode_set(struct drm_encoder *encoder,
                 radeon_combios_encoder_crtc_scratch_regs(encoder, radeon_crtc->crtc_id);
 }
 
+static void radeon_ext_tmds_enc_destroy(struct drm_encoder *encoder)
+{
+        struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+        struct radeon_encoder_ext_tmds *tmds = radeon_encoder->enc_priv;
+        if (tmds) {
+                if (tmds->i2c_bus)
+                        radeon_i2c_destroy(tmds->i2c_bus);
+        }
+        kfree(radeon_encoder->enc_priv);
+        drm_encoder_cleanup(encoder);
+        kfree(radeon_encoder);
+}
+
 static const struct drm_encoder_helper_funcs radeon_legacy_tmds_ext_helper_funcs = {
         .dpms = radeon_legacy_tmds_ext_dpms,
         .mode_fixup = radeon_legacy_tmds_ext_mode_fixup,
@@ -735,7 +750,7 @@ static const struct drm_encoder_helper_funcs radeon_legacy_tmds_ext_helper_funcs
 
 
 static const struct drm_encoder_funcs radeon_legacy_tmds_ext_enc_funcs = {
-        .destroy = radeon_enc_destroy,
+        .destroy = radeon_ext_tmds_enc_destroy,
 };
 
 static bool radeon_legacy_tv_dac_mode_fixup(struct drm_encoder *encoder,
@@ -1302,6 +1317,29 @@ static struct radeon_encoder_int_tmds *radeon_legacy_get_tmds_info(struct radeon
         return tmds;
 }
 
+static struct radeon_encoder_ext_tmds *radeon_legacy_get_ext_tmds_info(struct radeon_encoder *encoder)
+{
+        struct drm_device *dev = encoder->base.dev;
+        struct radeon_device *rdev = dev->dev_private;
+        struct radeon_encoder_ext_tmds *tmds = NULL;
+        bool ret;
+
+        if (rdev->is_atom_bios)
+                return NULL;
+
+        tmds = kzalloc(sizeof(struct radeon_encoder_ext_tmds), GFP_KERNEL);
+
+        if (!tmds)
+                return NULL;
+
+        ret = radeon_legacy_get_ext_tmds_info_from_combios(encoder, tmds);
+
+        if (ret == false)
+                radeon_legacy_get_ext_tmds_info_from_table(encoder, tmds);
+
+        return tmds;
+}
+
 void
 radeon_add_legacy_encoder(struct drm_device *dev, uint32_t encoder_id, uint32_t supported_device)
 {
@@ -1373,7 +1411,7 @@ radeon_add_legacy_encoder(struct drm_device *dev, uint32_t encoder_id, uint32_t
                 drm_encoder_init(dev, encoder, &radeon_legacy_tmds_ext_enc_funcs, DRM_MODE_ENCODER_TMDS);
                 drm_encoder_helper_add(encoder, &radeon_legacy_tmds_ext_helper_funcs);
                 if (!rdev->is_atom_bios)
-                        radeon_combios_get_ext_tmds_info(radeon_encoder);
+                        radeon_encoder->enc_priv = radeon_legacy_get_ext_tmds_info(radeon_encoder);
                 break;
         }
 }
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index 20847a2fc4dc..27ddc9b9a9ed 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -184,6 +184,11 @@ enum radeon_connector_table {
         CT_EMAC,
 };
 
+enum radeon_dvo_chip {
+        DVO_SIL164,
+        DVO_SIL1178,
+};
+
 struct radeon_mode_info {
         struct atom_context *atom_context;
         struct card_info *atom_card_info;
@@ -275,6 +280,13 @@ struct radeon_encoder_int_tmds {
         struct radeon_tmds_pll tmds_pll[4];
 };
 
+struct radeon_encoder_ext_tmds {
+        /* tmds over dvo */
+        struct radeon_i2c_chan *i2c_bus;
+        uint8_t slave_addr;
+        enum radeon_dvo_chip dvo_chip;
+};
+
 /* spread spectrum */
 struct radeon_atom_ss {
         uint16_t percentage;
@@ -343,6 +355,14 @@ extern struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev,
                                                  struct radeon_i2c_bus_rec *rec,
                                                  const char *name);
 extern void radeon_i2c_destroy(struct radeon_i2c_chan *i2c);
+extern void radeon_i2c_sw_get_byte(struct radeon_i2c_chan *i2c_bus,
+                                   u8 slave_addr,
+                                   u8 addr,
+                                   u8 *val);
+extern void radeon_i2c_sw_put_byte(struct radeon_i2c_chan *i2c,
+                                   u8 slave_addr,
+                                   u8 addr,
+                                   u8 val);
 extern bool radeon_ddc_probe(struct radeon_connector *radeon_connector);
 extern int radeon_ddc_get_modes(struct radeon_connector *radeon_connector);
 
@@ -392,12 +412,16 @@ extern bool radeon_atom_get_clock_info(struct drm_device *dev);
 extern bool radeon_combios_get_clock_info(struct drm_device *dev);
 extern struct radeon_encoder_atom_dig *
 radeon_atombios_get_lvds_info(struct radeon_encoder *encoder);
-bool radeon_atombios_get_tmds_info(struct radeon_encoder *encoder,
-                                   struct radeon_encoder_int_tmds *tmds);
-bool radeon_legacy_get_tmds_info_from_combios(struct radeon_encoder *encoder,
-                                           struct radeon_encoder_int_tmds *tmds);
-bool radeon_legacy_get_tmds_info_from_table(struct radeon_encoder *encoder,
-                                            struct radeon_encoder_int_tmds *tmds);
+extern bool radeon_atombios_get_tmds_info(struct radeon_encoder *encoder,
+                                          struct radeon_encoder_int_tmds *tmds);
+extern bool radeon_legacy_get_tmds_info_from_combios(struct radeon_encoder *encoder,
+                                                     struct radeon_encoder_int_tmds *tmds);
+extern bool radeon_legacy_get_tmds_info_from_table(struct radeon_encoder *encoder,
+                                                   struct radeon_encoder_int_tmds *tmds);
+extern bool radeon_legacy_get_ext_tmds_info_from_combios(struct radeon_encoder *encoder,
+                                                         struct radeon_encoder_ext_tmds *tmds);
+extern bool radeon_legacy_get_ext_tmds_info_from_table(struct radeon_encoder *encoder,
+                                                       struct radeon_encoder_ext_tmds *tmds);
 extern struct radeon_encoder_primary_dac *
 radeon_atombios_get_primary_dac_info(struct radeon_encoder *encoder);
 extern struct radeon_encoder_tv_dac *
@@ -409,6 +433,8 @@ extern struct radeon_encoder_tv_dac *
 radeon_combios_get_tv_dac_info(struct radeon_encoder *encoder);
 extern struct radeon_encoder_primary_dac *
 radeon_combios_get_primary_dac_info(struct radeon_encoder *encoder);
+extern bool radeon_combios_external_tmds_setup(struct drm_encoder *encoder);
+extern void radeon_external_tmds_setup(struct drm_encoder *encoder);
 extern void radeon_combios_output_lock(struct drm_encoder *encoder, bool lock);
 extern void radeon_combios_initialize_bios_scratch_regs(struct drm_device *dev);
 extern void radeon_atom_output_lock(struct drm_encoder *encoder, bool lock);
diff --git a/drivers/gpu/drm/radeon/radeon_reg.h b/drivers/gpu/drm/radeon/radeon_reg.h
index 29ab75903ec1..34ba06dba899 100644
--- a/drivers/gpu/drm/radeon/radeon_reg.h
+++ b/drivers/gpu/drm/radeon/radeon_reg.h
@@ -1051,20 +1051,25 @@
 
        /* Multimedia I2C bus */
 #define RADEON_I2C_CNTL_0                   0x0090
-#define RADEON_I2C_DONE (1<<0)
-#define RADEON_I2C_NACK (1<<1)
-#define RADEON_I2C_HALT (1<<2)
-#define RADEON_I2C_SOFT_RST (1<<5)
-#define RADEON_I2C_DRIVE_EN (1<<6)
-#define RADEON_I2C_DRIVE_SEL (1<<7)
-#define RADEON_I2C_START (1<<8)
-#define RADEON_I2C_STOP (1<<9)
-#define RADEON_I2C_RECEIVE (1<<10)
-#define RADEON_I2C_ABORT (1<<11)
-#define RADEON_I2C_GO (1<<12)
+#define RADEON_I2C_DONE                     (1 << 0)
+#define RADEON_I2C_NACK                     (1 << 1)
+#define RADEON_I2C_HALT                     (1 << 2)
+#define RADEON_I2C_SOFT_RST                 (1 << 5)
+#define RADEON_I2C_DRIVE_EN                 (1 << 6)
+#define RADEON_I2C_DRIVE_SEL                (1 << 7)
+#define RADEON_I2C_START                    (1 << 8)
+#define RADEON_I2C_STOP                     (1 << 9)
+#define RADEON_I2C_RECEIVE                  (1 << 10)
+#define RADEON_I2C_ABORT                    (1 << 11)
+#define RADEON_I2C_GO                       (1 << 12)
+#define RADEON_I2C_PRESCALE_SHIFT           16
 #define RADEON_I2C_CNTL_1                   0x0094
-#define RADEON_I2C_SEL         (1<<16)
-#define RADEON_I2C_EN          (1<<17)
+#define RADEON_I2C_DATA_COUNT_SHIFT         0
+#define RADEON_I2C_ADDR_COUNT_SHIFT         4
+#define RADEON_I2C_INTRA_BYTE_DELAY_SHIFT   8
+#define RADEON_I2C_SEL                      (1 << 16)
+#define RADEON_I2C_EN                       (1 << 17)
+#define RADEON_I2C_TIME_LIMIT_SHIFT         24
 #define RADEON_I2C_DATA                     0x0098
 
 #define RADEON_DVI_I2C_CNTL_0               0x02e0
@@ -1072,7 +1077,7 @@
 #       define R200_SEL_DDC1                0 /* 0x60 - VGA_DDC */
 #       define R200_SEL_DDC2                1 /* 0x64 - DVI_DDC */
 #       define R200_SEL_DDC3                2 /* 0x68 - MONID_DDC */
-#define RADEON_DVI_I2C_CNTL_1               0x02e4 /* ? */
+#define RADEON_DVI_I2C_CNTL_1               0x02e4
 #define RADEON_DVI_I2C_DATA                 0x02e8
 
 #define RADEON_INTERRUPT_LINE               0x0f3c /* PCI */
@@ -1143,14 +1148,15 @@
 #       define RADEON_IO_MCLK_MAX_DYN_STOP_LAT (1 << 13)
 #       define RADEON_MC_MCLK_DYN_ENABLE    (1 << 14)
 #       define RADEON_IO_MCLK_DYN_ENABLE    (1 << 15)
-#define RADEON_LCD_GPIO_MASK                0x01a0
+#define RADEON_GPIOPAD_MASK                 0x0198
+#define RADEON_GPIOPAD_A                    0x019c
 #define RADEON_GPIOPAD_EN                   0x01a0
+#define RADEON_GPIOPAD_Y                    0x01a4
+#define RADEON_LCD_GPIO_MASK                0x01a0
 #define RADEON_LCD_GPIO_Y_REG               0x01a4
 #define RADEON_MDGPIO_A_REG                 0x01ac
 #define RADEON_MDGPIO_EN_REG                0x01b0
 #define RADEON_MDGPIO_MASK                  0x0198
-#define RADEON_GPIOPAD_MASK                 0x0198
-#define RADEON_GPIOPAD_A                    0x019c
 #define RADEON_MDGPIO_Y_REG                 0x01b4
 #define RADEON_MEM_ADDR_CONFIG              0x0148
 #define RADEON_MEM_BASE                     0x0f10 /* PCI */