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path: root/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
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Diffstat (limited to 'drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c')
-rw-r--r--drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c159
1 files changed, 66 insertions, 93 deletions
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
index d3398f6250ef..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)
{
@@ -52,7 +50,7 @@ static int sun4i_hdmi_setup_avi_infoframes(struct sun4i_hdmi *hdmi,
u8 buffer[17];
int i, ret;
- ret = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode);
+ ret = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode, false);
if (ret < 0) {
DRM_ERROR("Failed to get infoframes from mode\n");
return ret;
@@ -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;
}
@@ -299,14 +216,15 @@ 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;
}
static const struct drm_connector_funcs sun4i_hdmi_connector_funcs = {
- .dpms = drm_atomic_helper_connector_dpms,
.detect = sun4i_hdmi_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = drm_connector_cleanup,
@@ -315,6 +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)
{
@@ -407,9 +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;
}
@@ -422,13 +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);
@@ -445,12 +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;
}
@@ -459,8 +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 = {
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-03 14:03:53 +0300