diff options
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/sun4i/Kconfig | 16 | ||||
| -rw-r--r-- | drivers/gpu/drm/sun4i/Makefile | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_hdmi.h | 32 | ||||
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c | 156 | ||||
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c | 220 | ||||
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_layer.c | 9 | ||||
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_rgb.c | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_tcon.h | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_tv.c | 8 |
9 files changed, 332 insertions, 120 deletions
diff --git a/drivers/gpu/drm/sun4i/Kconfig b/drivers/gpu/drm/sun4i/Kconfig index 5bcad8f5fb4f..06f05302ee75 100644 --- a/drivers/gpu/drm/sun4i/Kconfig +++ b/drivers/gpu/drm/sun4i/Kconfig @@ -13,17 +13,26 @@ config DRM_SUN4I Display Engine. If M is selected the module will be called sun4i-drm. +if DRM_SUN4I + config DRM_SUN4I_HDMI tristate "Allwinner A10 HDMI Controller Support" - depends on DRM_SUN4I default DRM_SUN4I help Choose this option if you have an Allwinner SoC with an HDMI controller. +config DRM_SUN4I_HDMI_CEC + bool "Allwinner A10 HDMI CEC Support" + depends on DRM_SUN4I_HDMI + select CEC_CORE + depends on CEC_PIN + help + Choose this option if you have an Allwinner SoC with an HDMI + controller and want to use CEC. + config DRM_SUN4I_BACKEND tristate "Support for Allwinner A10 Display Engine Backend" - depends on DRM_SUN4I default DRM_SUN4I help Choose this option if you have an Allwinner SoC with the @@ -33,10 +42,11 @@ config DRM_SUN4I_BACKEND config DRM_SUN8I_MIXER tristate "Support for Allwinner Display Engine 2.0 Mixer" - depends on DRM_SUN4I default MACH_SUN8I help Choose this option if you have an Allwinner SoC with the Allwinner Display Engine 2.0, which has a mixer to do some graphics mixture and feed graphics to TCON, If M is selected the module will be called sun8i-mixer. + +endif diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile index e29fd3a2ba9c..43c753cafc88 100644 --- a/drivers/gpu/drm/sun4i/Makefile +++ b/drivers/gpu/drm/sun4i/Makefile @@ -2,6 +2,7 @@ sun4i-drm-y += sun4i_drv.o sun4i-drm-y += sun4i_framebuffer.o sun4i-drm-hdmi-y += sun4i_hdmi_enc.o +sun4i-drm-hdmi-y += sun4i_hdmi_i2c.o sun4i-drm-hdmi-y += sun4i_hdmi_ddc_clk.o sun4i-drm-hdmi-y += sun4i_hdmi_tmds_clk.o diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi.h b/drivers/gpu/drm/sun4i/sun4i_hdmi.h index 2f2f2ff1ea63..1457750988da 100644 --- a/drivers/gpu/drm/sun4i/sun4i_hdmi.h +++ b/drivers/gpu/drm/sun4i/sun4i_hdmi.h @@ -15,6 +15,8 @@ #include <drm/drm_connector.h> #include <drm/drm_encoder.h> +#include <media/cec.h> + #define SUN4I_HDMI_CTRL_REG 0x004 #define SUN4I_HDMI_CTRL_ENABLE BIT(31) @@ -86,6 +88,11 @@ #define SUN4I_HDMI_PLL_DBG0_TMDS_PARENT_MASK BIT(21) #define SUN4I_HDMI_PLL_DBG0_TMDS_PARENT_SHIFT 21 +#define SUN4I_HDMI_CEC 0x214 +#define SUN4I_HDMI_CEC_ENABLE BIT(11) +#define SUN4I_HDMI_CEC_TX BIT(9) +#define SUN4I_HDMI_CEC_RX BIT(8) + #define SUN4I_HDMI_PKT_CTRL_REG(n) (0x2f0 + (4 * (n))) #define SUN4I_HDMI_PKT_CTRL_TYPE(n, t) ((t) << (((n) % 4) * 4)) @@ -96,6 +103,7 @@ #define SUN4I_HDMI_DDC_CTRL_ENABLE BIT(31) #define SUN4I_HDMI_DDC_CTRL_START_CMD BIT(30) #define SUN4I_HDMI_DDC_CTRL_FIFO_DIR_MASK BIT(8) +#define SUN4I_HDMI_DDC_CTRL_FIFO_DIR_WRITE (1 << 8) #define SUN4I_HDMI_DDC_CTRL_FIFO_DIR_READ (0 << 8) #define SUN4I_HDMI_DDC_CTRL_RESET BIT(0) @@ -105,14 +113,34 @@ #define SUN4I_HDMI_DDC_ADDR_OFFSET(off) (((off) & 0xff) << 8) #define SUN4I_HDMI_DDC_ADDR_SLAVE(addr) ((addr) & 0xff) +#define SUN4I_HDMI_DDC_INT_STATUS_REG 0x50c +#define SUN4I_HDMI_DDC_INT_STATUS_ILLEGAL_FIFO_OPERATION BIT(7) +#define SUN4I_HDMI_DDC_INT_STATUS_DDC_RX_FIFO_UNDERFLOW BIT(6) +#define SUN4I_HDMI_DDC_INT_STATUS_DDC_TX_FIFO_OVERFLOW BIT(5) +#define SUN4I_HDMI_DDC_INT_STATUS_FIFO_REQUEST BIT(4) +#define SUN4I_HDMI_DDC_INT_STATUS_ARBITRATION_ERROR BIT(3) +#define SUN4I_HDMI_DDC_INT_STATUS_ACK_ERROR BIT(2) +#define SUN4I_HDMI_DDC_INT_STATUS_BUS_ERROR BIT(1) +#define SUN4I_HDMI_DDC_INT_STATUS_TRANSFER_COMPLETE BIT(0) + #define SUN4I_HDMI_DDC_FIFO_CTRL_REG 0x510 #define SUN4I_HDMI_DDC_FIFO_CTRL_CLEAR BIT(31) +#define SUN4I_HDMI_DDC_FIFO_CTRL_RX_THRES(n) (((n) & 0xf) << 4) +#define SUN4I_HDMI_DDC_FIFO_CTRL_RX_THRES_MASK GENMASK(7, 4) +#define SUN4I_HDMI_DDC_FIFO_CTRL_RX_THRES_MAX (BIT(4) - 1) +#define SUN4I_HDMI_DDC_FIFO_CTRL_TX_THRES(n) ((n) & 0xf) +#define SUN4I_HDMI_DDC_FIFO_CTRL_TX_THRES_MASK GENMASK(3, 0) +#define SUN4I_HDMI_DDC_FIFO_CTRL_TX_THRES_MAX (BIT(4) - 1) #define SUN4I_HDMI_DDC_FIFO_DATA_REG 0x518 + #define SUN4I_HDMI_DDC_BYTE_COUNT_REG 0x51c +#define SUN4I_HDMI_DDC_BYTE_COUNT_MAX (BIT(10) - 1) #define SUN4I_HDMI_DDC_CMD_REG 0x520 #define SUN4I_HDMI_DDC_CMD_EXPLICIT_EDDC_READ 6 +#define SUN4I_HDMI_DDC_CMD_IMPLICIT_READ 5 +#define SUN4I_HDMI_DDC_CMD_IMPLICIT_WRITE 3 #define SUN4I_HDMI_DDC_CLK_REG 0x528 #define SUN4I_HDMI_DDC_CLK_M(m) (((m) & 0x7) << 3) @@ -146,12 +174,16 @@ struct sun4i_hdmi { struct clk *ddc_clk; struct clk *tmds_clk; + struct i2c_adapter *i2c; + struct sun4i_drv *drv; bool hdmi_monitor; + struct cec_adapter *cec_adap; }; int sun4i_ddc_create(struct sun4i_hdmi *hdmi, struct clk *clk); int sun4i_tmds_create(struct sun4i_hdmi *hdmi); +int sun4i_hdmi_i2c_create(struct device *dev, struct sun4i_hdmi *hdmi); #endif /* _SUN4I_HDMI_H_ */ diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c index f5d0d6bd1084..9ea6cd5a1370 100644 --- a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c +++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c @@ -29,8 +29,6 @@ #include "sun4i_hdmi.h" #include "sun4i_tcon.h" -#define DDC_SEGMENT_ADDR 0x30 - static inline struct sun4i_hdmi * drm_encoder_to_sun4i_hdmi(struct drm_encoder *encoder) { @@ -184,93 +182,13 @@ static const struct drm_encoder_funcs sun4i_hdmi_funcs = { .destroy = drm_encoder_cleanup, }; -static int sun4i_hdmi_read_sub_block(struct sun4i_hdmi *hdmi, - unsigned int blk, unsigned int offset, - u8 *buf, unsigned int count) -{ - unsigned long reg; - int i; - - reg = readl(hdmi->base + SUN4I_HDMI_DDC_CTRL_REG); - reg &= ~SUN4I_HDMI_DDC_CTRL_FIFO_DIR_MASK; - writel(reg | SUN4I_HDMI_DDC_CTRL_FIFO_DIR_READ, - hdmi->base + SUN4I_HDMI_DDC_CTRL_REG); - - writel(SUN4I_HDMI_DDC_ADDR_SEGMENT(offset >> 8) | - SUN4I_HDMI_DDC_ADDR_EDDC(DDC_SEGMENT_ADDR << 1) | - SUN4I_HDMI_DDC_ADDR_OFFSET(offset) | - SUN4I_HDMI_DDC_ADDR_SLAVE(DDC_ADDR), - hdmi->base + SUN4I_HDMI_DDC_ADDR_REG); - - reg = readl(hdmi->base + SUN4I_HDMI_DDC_FIFO_CTRL_REG); - writel(reg | SUN4I_HDMI_DDC_FIFO_CTRL_CLEAR, - hdmi->base + SUN4I_HDMI_DDC_FIFO_CTRL_REG); - - writel(count, hdmi->base + SUN4I_HDMI_DDC_BYTE_COUNT_REG); - writel(SUN4I_HDMI_DDC_CMD_EXPLICIT_EDDC_READ, - hdmi->base + SUN4I_HDMI_DDC_CMD_REG); - - reg = readl(hdmi->base + SUN4I_HDMI_DDC_CTRL_REG); - writel(reg | SUN4I_HDMI_DDC_CTRL_START_CMD, - hdmi->base + SUN4I_HDMI_DDC_CTRL_REG); - - if (readl_poll_timeout(hdmi->base + SUN4I_HDMI_DDC_CTRL_REG, reg, - !(reg & SUN4I_HDMI_DDC_CTRL_START_CMD), - 100, 100000)) - return -EIO; - - for (i = 0; i < count; i++) - buf[i] = readb(hdmi->base + SUN4I_HDMI_DDC_FIFO_DATA_REG); - - return 0; -} - -static int sun4i_hdmi_read_edid_block(void *data, u8 *buf, unsigned int blk, - size_t length) -{ - struct sun4i_hdmi *hdmi = data; - int retry = 2, i; - - do { - for (i = 0; i < length; i += SUN4I_HDMI_DDC_FIFO_SIZE) { - unsigned char offset = blk * EDID_LENGTH + i; - unsigned int count = min((unsigned int)SUN4I_HDMI_DDC_FIFO_SIZE, - length - i); - int ret; - - ret = sun4i_hdmi_read_sub_block(hdmi, blk, offset, - buf + i, count); - if (ret) - return ret; - } - } while (!drm_edid_block_valid(buf, blk, true, NULL) && (retry--)); - - return 0; -} - static int sun4i_hdmi_get_modes(struct drm_connector *connector) { struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector); - unsigned long reg; struct edid *edid; int ret; - /* Reset i2c controller */ - writel(SUN4I_HDMI_DDC_CTRL_ENABLE | SUN4I_HDMI_DDC_CTRL_RESET, - hdmi->base + SUN4I_HDMI_DDC_CTRL_REG); - if (readl_poll_timeout(hdmi->base + SUN4I_HDMI_DDC_CTRL_REG, reg, - !(reg & SUN4I_HDMI_DDC_CTRL_RESET), - 100, 2000)) - return -EIO; - - writel(SUN4I_HDMI_DDC_LINE_CTRL_SDA_ENABLE | - SUN4I_HDMI_DDC_LINE_CTRL_SCL_ENABLE, - hdmi->base + SUN4I_HDMI_DDC_LINE_CTRL_REG); - - clk_prepare_enable(hdmi->ddc_clk); - clk_set_rate(hdmi->ddc_clk, 100000); - - edid = drm_do_get_edid(connector, sun4i_hdmi_read_edid_block, hdmi); + edid = drm_get_edid(connector, hdmi->i2c); if (!edid) return 0; @@ -279,11 +197,10 @@ static int sun4i_hdmi_get_modes(struct drm_connector *connector) hdmi->hdmi_monitor ? "an HDMI" : "a DVI"); drm_mode_connector_update_edid_property(connector, edid); + cec_s_phys_addr_from_edid(hdmi->cec_adap, edid); ret = drm_add_edid_modes(connector, edid); kfree(edid); - clk_disable_unprepare(hdmi->ddc_clk); - return ret; } @@ -299,8 +216,10 @@ sun4i_hdmi_connector_detect(struct drm_connector *connector, bool force) if (readl_poll_timeout(hdmi->base + SUN4I_HDMI_HPD_REG, reg, reg & SUN4I_HDMI_HPD_HIGH, - 0, 500000)) + 0, 500000)) { + cec_phys_addr_invalidate(hdmi->cec_adap); return connector_status_disconnected; + } return connector_status_connected; } @@ -314,6 +233,40 @@ static const struct drm_connector_funcs sun4i_hdmi_connector_funcs = { .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, }; +#ifdef CONFIG_DRM_SUN4I_HDMI_CEC +static bool sun4i_hdmi_cec_pin_read(struct cec_adapter *adap) +{ + struct sun4i_hdmi *hdmi = cec_get_drvdata(adap); + + return readl(hdmi->base + SUN4I_HDMI_CEC) & SUN4I_HDMI_CEC_RX; +} + +static void sun4i_hdmi_cec_pin_low(struct cec_adapter *adap) +{ + struct sun4i_hdmi *hdmi = cec_get_drvdata(adap); + + /* Start driving the CEC pin low */ + writel(SUN4I_HDMI_CEC_ENABLE, hdmi->base + SUN4I_HDMI_CEC); +} + +static void sun4i_hdmi_cec_pin_high(struct cec_adapter *adap) +{ + struct sun4i_hdmi *hdmi = cec_get_drvdata(adap); + + /* + * Stop driving the CEC pin, the pull up will take over + * unless another CEC device is driving the pin low. + */ + writel(0, hdmi->base + SUN4I_HDMI_CEC); +} + +static const struct cec_pin_ops sun4i_hdmi_cec_pin_ops = { + .read = sun4i_hdmi_cec_pin_read, + .low = sun4i_hdmi_cec_pin_low, + .high = sun4i_hdmi_cec_pin_high, +}; +#endif + static int sun4i_hdmi_bind(struct device *dev, struct device *master, void *data) { @@ -406,9 +359,9 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master, SUN4I_HDMI_PLL_CTRL_PLL_EN; writel(reg, hdmi->base + SUN4I_HDMI_PLL_CTRL_REG); - ret = sun4i_ddc_create(hdmi, hdmi->tmds_clk); + ret = sun4i_hdmi_i2c_create(dev, hdmi); if (ret) { - dev_err(dev, "Couldn't create the DDC clock\n"); + dev_err(dev, "Couldn't create the HDMI I2C adapter\n"); return ret; } @@ -421,13 +374,26 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master, NULL); if (ret) { dev_err(dev, "Couldn't initialise the HDMI encoder\n"); - return ret; + goto err_del_i2c_adapter; } hdmi->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node); - if (!hdmi->encoder.possible_crtcs) - return -EPROBE_DEFER; + if (!hdmi->encoder.possible_crtcs) { + ret = -EPROBE_DEFER; + goto err_del_i2c_adapter; + } + +#ifdef CONFIG_DRM_SUN4I_HDMI_CEC + hdmi->cec_adap = cec_pin_allocate_adapter(&sun4i_hdmi_cec_pin_ops, + hdmi, "sun4i", CEC_CAP_TRANSMIT | CEC_CAP_LOG_ADDRS | + CEC_CAP_PASSTHROUGH | CEC_CAP_RC); + ret = PTR_ERR_OR_ZERO(hdmi->cec_adap); + if (ret < 0) + goto err_cleanup_connector; + writel(readl(hdmi->base + SUN4I_HDMI_CEC) & ~SUN4I_HDMI_CEC_TX, + hdmi->base + SUN4I_HDMI_CEC); +#endif drm_connector_helper_add(&hdmi->connector, &sun4i_hdmi_connector_helper_funcs); @@ -444,12 +410,18 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master, hdmi->connector.polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT; + ret = cec_register_adapter(hdmi->cec_adap, dev); + if (ret < 0) + goto err_cleanup_connector; drm_mode_connector_attach_encoder(&hdmi->connector, &hdmi->encoder); return 0; err_cleanup_connector: + cec_delete_adapter(hdmi->cec_adap); drm_encoder_cleanup(&hdmi->encoder); +err_del_i2c_adapter: + i2c_del_adapter(hdmi->i2c); return ret; } @@ -458,8 +430,10 @@ static void sun4i_hdmi_unbind(struct device *dev, struct device *master, { struct sun4i_hdmi *hdmi = dev_get_drvdata(dev); + cec_unregister_adapter(hdmi->cec_adap); drm_connector_cleanup(&hdmi->connector); drm_encoder_cleanup(&hdmi->encoder); + i2c_del_adapter(hdmi->i2c); } static const struct component_ops sun4i_hdmi_ops = { diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c new file mode 100644 index 000000000000..2e42d09ab42e --- /dev/null +++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c @@ -0,0 +1,220 @@ +/* + * Copyright (C) 2016 Maxime Ripard <maxime.ripard@free-electrons.com> + * Copyright (C) 2017 Jonathan Liu <net147@gmail.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/i2c.h> +#include <linux/iopoll.h> + +#include "sun4i_hdmi.h" + +#define SUN4I_HDMI_DDC_INT_STATUS_ERROR_MASK ( \ + SUN4I_HDMI_DDC_INT_STATUS_ILLEGAL_FIFO_OPERATION | \ + SUN4I_HDMI_DDC_INT_STATUS_DDC_RX_FIFO_UNDERFLOW | \ + SUN4I_HDMI_DDC_INT_STATUS_DDC_TX_FIFO_OVERFLOW | \ + SUN4I_HDMI_DDC_INT_STATUS_ARBITRATION_ERROR | \ + SUN4I_HDMI_DDC_INT_STATUS_ACK_ERROR | \ + SUN4I_HDMI_DDC_INT_STATUS_BUS_ERROR \ +) + +/* FIFO request bit is set when FIFO level is above RX_THRESHOLD during read */ +#define RX_THRESHOLD SUN4I_HDMI_DDC_FIFO_CTRL_RX_THRES_MAX +/* FIFO request bit is set when FIFO level is below TX_THRESHOLD during write */ +#define TX_THRESHOLD 1 + +static int fifo_transfer(struct sun4i_hdmi *hdmi, u8 *buf, int len, bool read) +{ + /* + * 1 byte takes 9 clock cycles (8 bits + 1 ACK) = 90 us for 100 kHz + * clock. As clock rate is fixed, just round it up to 100 us. + */ + const unsigned long byte_time_ns = 100; + const u32 mask = SUN4I_HDMI_DDC_INT_STATUS_ERROR_MASK | + SUN4I_HDMI_DDC_INT_STATUS_FIFO_REQUEST | + SUN4I_HDMI_DDC_INT_STATUS_TRANSFER_COMPLETE; + u32 reg; + + /* Limit transfer length by FIFO threshold */ + len = min_t(int, len, read ? (RX_THRESHOLD + 1) : + (SUN4I_HDMI_DDC_FIFO_SIZE - TX_THRESHOLD + 1)); + + /* Wait until error, FIFO request bit set or transfer complete */ + if (readl_poll_timeout(hdmi->base + SUN4I_HDMI_DDC_INT_STATUS_REG, reg, + reg & mask, len * byte_time_ns, 100000)) + return -ETIMEDOUT; + + if (reg & SUN4I_HDMI_DDC_INT_STATUS_ERROR_MASK) + return -EIO; + + if (read) + readsb(hdmi->base + SUN4I_HDMI_DDC_FIFO_DATA_REG, buf, len); + else + writesb(hdmi->base + SUN4I_HDMI_DDC_FIFO_DATA_REG, buf, len); + + /* Clear FIFO request bit */ + writel(SUN4I_HDMI_DDC_INT_STATUS_FIFO_REQUEST, + hdmi->base + SUN4I_HDMI_DDC_INT_STATUS_REG); + + return len; +} + +static int xfer_msg(struct sun4i_hdmi *hdmi, struct i2c_msg *msg) +{ + int i, len; + u32 reg; + + /* Set FIFO direction */ + reg = readl(hdmi->base + SUN4I_HDMI_DDC_CTRL_REG); + reg &= ~SUN4I_HDMI_DDC_CTRL_FIFO_DIR_MASK; + reg |= (msg->flags & I2C_M_RD) ? + SUN4I_HDMI_DDC_CTRL_FIFO_DIR_READ : + SUN4I_HDMI_DDC_CTRL_FIFO_DIR_WRITE; + writel(reg, hdmi->base + SUN4I_HDMI_DDC_CTRL_REG); + + /* Set I2C address */ + writel(SUN4I_HDMI_DDC_ADDR_SLAVE(msg->addr), + hdmi->base + SUN4I_HDMI_DDC_ADDR_REG); + + /* Set FIFO RX/TX thresholds and clear FIFO */ + reg = readl(hdmi->base + SUN4I_HDMI_DDC_FIFO_CTRL_REG); + reg |= SUN4I_HDMI_DDC_FIFO_CTRL_CLEAR; + reg &= ~SUN4I_HDMI_DDC_FIFO_CTRL_RX_THRES_MASK; + reg |= SUN4I_HDMI_DDC_FIFO_CTRL_RX_THRES(RX_THRESHOLD); + reg &= ~SUN4I_HDMI_DDC_FIFO_CTRL_TX_THRES_MASK; + reg |= SUN4I_HDMI_DDC_FIFO_CTRL_TX_THRES(TX_THRESHOLD); + writel(reg, hdmi->base + SUN4I_HDMI_DDC_FIFO_CTRL_REG); + if (readl_poll_timeout(hdmi->base + SUN4I_HDMI_DDC_FIFO_CTRL_REG, + reg, + !(reg & SUN4I_HDMI_DDC_FIFO_CTRL_CLEAR), + 100, 2000)) + return -EIO; + + /* Set transfer length */ + writel(msg->len, hdmi->base + SUN4I_HDMI_DDC_BYTE_COUNT_REG); + + /* Set command */ + writel(msg->flags & I2C_M_RD ? + SUN4I_HDMI_DDC_CMD_IMPLICIT_READ : + SUN4I_HDMI_DDC_CMD_IMPLICIT_WRITE, + hdmi->base + SUN4I_HDMI_DDC_CMD_REG); + + /* Clear interrupt status bits */ + writel(SUN4I_HDMI_DDC_INT_STATUS_ERROR_MASK | + SUN4I_HDMI_DDC_INT_STATUS_FIFO_REQUEST | + SUN4I_HDMI_DDC_INT_STATUS_TRANSFER_COMPLETE, + hdmi->base + SUN4I_HDMI_DDC_INT_STATUS_REG); + + /* Start command */ + reg = readl(hdmi->base + SUN4I_HDMI_DDC_CTRL_REG); + writel(reg | SUN4I_HDMI_DDC_CTRL_START_CMD, + hdmi->base + SUN4I_HDMI_DDC_CTRL_REG); + + /* Transfer bytes */ + for (i = 0; i < msg->len; i += len) { + len = fifo_transfer(hdmi, msg->buf + i, msg->len - i, + msg->flags & I2C_M_RD); + if (len <= 0) + return len; + } + + /* Wait for command to finish */ + if (readl_poll_timeout(hdmi->base + SUN4I_HDMI_DDC_CTRL_REG, + reg, + !(reg & SUN4I_HDMI_DDC_CTRL_START_CMD), + 100, 100000)) + return -EIO; + + /* Check for errors */ + reg = readl(hdmi->base + SUN4I_HDMI_DDC_INT_STATUS_REG); + if ((reg & SUN4I_HDMI_DDC_INT_STATUS_ERROR_MASK) || + !(reg & SUN4I_HDMI_DDC_INT_STATUS_TRANSFER_COMPLETE)) { + return -EIO; + } + + return 0; +} + +static int sun4i_hdmi_i2c_xfer(struct i2c_adapter *adap, + struct i2c_msg *msgs, int num) +{ + struct sun4i_hdmi *hdmi = i2c_get_adapdata(adap); + u32 reg; + int err, i, ret = num; + + for (i = 0; i < num; i++) { + if (!msgs[i].len) + return -EINVAL; + if (msgs[i].len > SUN4I_HDMI_DDC_BYTE_COUNT_MAX) + return -EINVAL; + } + + /* Reset I2C controller */ + writel(SUN4I_HDMI_DDC_CTRL_ENABLE | SUN4I_HDMI_DDC_CTRL_RESET, + hdmi->base + SUN4I_HDMI_DDC_CTRL_REG); + if (readl_poll_timeout(hdmi->base + SUN4I_HDMI_DDC_CTRL_REG, reg, + !(reg & SUN4I_HDMI_DDC_CTRL_RESET), + 100, 2000)) + return -EIO; + + writel(SUN4I_HDMI_DDC_LINE_CTRL_SDA_ENABLE | + SUN4I_HDMI_DDC_LINE_CTRL_SCL_ENABLE, + hdmi->base + SUN4I_HDMI_DDC_LINE_CTRL_REG); + + clk_prepare_enable(hdmi->ddc_clk); + clk_set_rate(hdmi->ddc_clk, 100000); + + for (i = 0; i < num; i++) { + err = xfer_msg(hdmi, &msgs[i]); + if (err) { + ret = err; + break; + } + } + + clk_disable_unprepare(hdmi->ddc_clk); + return ret; +} + +static u32 sun4i_hdmi_i2c_func(struct i2c_adapter *adap) +{ + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; +} + +static const struct i2c_algorithm sun4i_hdmi_i2c_algorithm = { + .master_xfer = sun4i_hdmi_i2c_xfer, + .functionality = sun4i_hdmi_i2c_func, +}; + +int sun4i_hdmi_i2c_create(struct device *dev, struct sun4i_hdmi *hdmi) +{ + struct i2c_adapter *adap; + int ret = 0; + + ret = sun4i_ddc_create(hdmi, hdmi->tmds_clk); + if (ret) + return ret; + + adap = devm_kzalloc(dev, sizeof(*adap), GFP_KERNEL); + if (!adap) + return -ENOMEM; + + adap->owner = THIS_MODULE; + adap->class = I2C_CLASS_DDC; + adap->algo = &sun4i_hdmi_i2c_algorithm; + strlcpy(adap->name, "sun4i_hdmi_i2c adapter", sizeof(adap->name)); + i2c_set_adapdata(adap, hdmi); + + ret = i2c_add_adapter(adap); + if (ret) + return ret; + + hdmi->i2c = adap; + + return ret; +} diff --git a/drivers/gpu/drm/sun4i/sun4i_layer.c b/drivers/gpu/drm/sun4i/sun4i_layer.c index d45f3a1a0a29..7bddf12548d3 100644 --- a/drivers/gpu/drm/sun4i/sun4i_layer.c +++ b/drivers/gpu/drm/sun4i/sun4i_layer.c @@ -25,12 +25,6 @@ struct sun4i_plane_desc { uint32_t nformats; }; -static int sun4i_backend_layer_atomic_check(struct drm_plane *plane, - struct drm_plane_state *state) -{ - return 0; -} - static void sun4i_backend_layer_atomic_disable(struct drm_plane *plane, struct drm_plane_state *old_state) { @@ -52,8 +46,7 @@ static void sun4i_backend_layer_atomic_update(struct drm_plane *plane, sun4i_backend_layer_enable(backend, layer->id, true); } -static struct drm_plane_helper_funcs sun4i_backend_layer_helper_funcs = { - .atomic_check = sun4i_backend_layer_atomic_check, +static const struct drm_plane_helper_funcs sun4i_backend_layer_helper_funcs = { .atomic_disable = sun4i_backend_layer_atomic_disable, .atomic_update = sun4i_backend_layer_atomic_update, }; diff --git a/drivers/gpu/drm/sun4i/sun4i_rgb.c b/drivers/gpu/drm/sun4i/sun4i_rgb.c index 42a238bbb899..7cd7090ad63a 100644 --- a/drivers/gpu/drm/sun4i/sun4i_rgb.c +++ b/drivers/gpu/drm/sun4i/sun4i_rgb.c @@ -127,13 +127,6 @@ static const struct drm_connector_funcs sun4i_rgb_con_funcs = { .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, }; -static int sun4i_rgb_atomic_check(struct drm_encoder *encoder, - struct drm_crtc_state *crtc_state, - struct drm_connector_state *conn_state) -{ - return 0; -} - static void sun4i_rgb_encoder_enable(struct drm_encoder *encoder) { struct sun4i_rgb *rgb = drm_encoder_to_sun4i_rgb(encoder); @@ -181,7 +174,6 @@ static void sun4i_rgb_encoder_mode_set(struct drm_encoder *encoder, } static struct drm_encoder_helper_funcs sun4i_rgb_enc_helper_funcs = { - .atomic_check = sun4i_rgb_atomic_check, .mode_set = sun4i_rgb_encoder_mode_set, .disable = sun4i_rgb_encoder_disable, .enable = sun4i_rgb_encoder_enable, diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.h b/drivers/gpu/drm/sun4i/sun4i_tcon.h index e3c50ecdcd04..552c88ec16be 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tcon.h +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.h @@ -194,8 +194,6 @@ void sun4i_tcon_channel_enable(struct sun4i_tcon *tcon, int channel); void sun4i_tcon_enable_vblank(struct sun4i_tcon *tcon, bool enable); /* Mode Related Controls */ -void sun4i_tcon_switch_interlace(struct sun4i_tcon *tcon, - bool enable); void sun4i_tcon_set_mux(struct sun4i_tcon *tcon, int channel, struct drm_encoder *encoder); void sun4i_tcon0_mode_set(struct sun4i_tcon *tcon, diff --git a/drivers/gpu/drm/sun4i/sun4i_tv.c b/drivers/gpu/drm/sun4i/sun4i_tv.c index 4edf15e299ab..050cfd43c7a0 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tv.c +++ b/drivers/gpu/drm/sun4i/sun4i_tv.c @@ -341,13 +341,6 @@ static void sun4i_tv_mode_to_drm_mode(const struct tv_mode *tv_mode, 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); @@ -489,7 +482,6 @@ static void sun4i_tv_mode_set(struct drm_encoder *encoder, } 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, |