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path: root/drivers/gpu/drm/i915/intel_dp.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
-rw-r--r--drivers/gpu/drm/i915/intel_dp.c162
1 files changed, 137 insertions, 25 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index d83447557f9b..4e7aa8b7b938 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -33,7 +33,8 @@
#include "intel_drv.h"
#include "i915_drm.h"
#include "i915_drv.h"
-#include "intel_dp.h"
+#include "drm_dp_helper.h"
+
#define DP_LINK_STATUS_SIZE 6
#define DP_LINK_CHECK_TIMEOUT (10 * 1000)
@@ -223,8 +224,8 @@ intel_dp_aux_ch(struct intel_output *intel_output,
*/
if (IS_eDP(intel_output))
aux_clock_divider = 225; /* eDP input clock at 450Mhz */
- else if (IS_IGDNG(dev))
- aux_clock_divider = 62; /* IGDNG: input clock fixed at 125Mhz */
+ else if (IS_IRONLAKE(dev))
+ aux_clock_divider = 62; /* IRL input clock fixed at 125Mhz */
else
aux_clock_divider = intel_hrawclk(dev) / 2;
@@ -282,7 +283,7 @@ intel_dp_aux_ch(struct intel_output *intel_output,
/* Timeouts occur when the device isn't connected, so they're
* "normal" -- don't fill the kernel log with these */
if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) {
- DRM_DEBUG("dp_aux_ch timeout status 0x%08x\n", status);
+ DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status);
return -ETIMEDOUT;
}
@@ -382,17 +383,77 @@ intel_dp_aux_native_read(struct intel_output *intel_output,
}
static int
-intel_dp_i2c_aux_ch(struct i2c_adapter *adapter,
- uint8_t *send, int send_bytes,
- uint8_t *recv, int recv_bytes)
+intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
+ uint8_t write_byte, uint8_t *read_byte)
{
+ struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
struct intel_dp_priv *dp_priv = container_of(adapter,
struct intel_dp_priv,
adapter);
struct intel_output *intel_output = dp_priv->intel_output;
+ uint16_t address = algo_data->address;
+ uint8_t msg[5];
+ uint8_t reply[2];
+ int msg_bytes;
+ int reply_bytes;
+ int ret;
+
+ /* Set up the command byte */
+ if (mode & MODE_I2C_READ)
+ msg[0] = AUX_I2C_READ << 4;
+ else
+ msg[0] = AUX_I2C_WRITE << 4;
+
+ if (!(mode & MODE_I2C_STOP))
+ msg[0] |= AUX_I2C_MOT << 4;
- return intel_dp_aux_ch(intel_output,
- send, send_bytes, recv, recv_bytes);
+ msg[1] = address >> 8;
+ msg[2] = address;
+
+ switch (mode) {
+ case MODE_I2C_WRITE:
+ msg[3] = 0;
+ msg[4] = write_byte;
+ msg_bytes = 5;
+ reply_bytes = 1;
+ break;
+ case MODE_I2C_READ:
+ msg[3] = 0;
+ msg_bytes = 4;
+ reply_bytes = 2;
+ break;
+ default:
+ msg_bytes = 3;
+ reply_bytes = 1;
+ break;
+ }
+
+ for (;;) {
+ ret = intel_dp_aux_ch(intel_output,
+ msg, msg_bytes,
+ reply, reply_bytes);
+ if (ret < 0) {
+ DRM_DEBUG_KMS("aux_ch failed %d\n", ret);
+ return ret;
+ }
+ switch (reply[0] & AUX_I2C_REPLY_MASK) {
+ case AUX_I2C_REPLY_ACK:
+ if (mode == MODE_I2C_READ) {
+ *read_byte = reply[1];
+ }
+ return reply_bytes - 1;
+ case AUX_I2C_REPLY_NACK:
+ DRM_DEBUG_KMS("aux_ch nack\n");
+ return -EREMOTEIO;
+ case AUX_I2C_REPLY_DEFER:
+ DRM_DEBUG_KMS("aux_ch defer\n");
+ udelay(100);
+ break;
+ default:
+ DRM_ERROR("aux_ch invalid reply 0x%02x\n", reply[0]);
+ return -EREMOTEIO;
+ }
+ }
}
static int
@@ -435,7 +496,8 @@ intel_dp_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode,
dp_priv->link_bw = bws[clock];
dp_priv->lane_count = lane_count;
adjusted_mode->clock = intel_dp_link_clock(dp_priv->link_bw);
- DRM_DEBUG("Display port link bw %02x lane count %d clock %d\n",
+ DRM_DEBUG_KMS("Display port link bw %02x lane "
+ "count %d clock %d\n",
dp_priv->link_bw, dp_priv->lane_count,
adjusted_mode->clock);
return true;
@@ -514,7 +576,7 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
intel_dp_compute_m_n(3, lane_count,
mode->clock, adjusted_mode->clock, &m_n);
- if (IS_IGDNG(dev)) {
+ if (IS_IRONLAKE(dev)) {
if (intel_crtc->pipe == 0) {
I915_WRITE(TRANSA_DATA_M1,
((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) |
@@ -606,23 +668,23 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
}
}
-static void igdng_edp_backlight_on (struct drm_device *dev)
+static void ironlake_edp_backlight_on (struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 pp;
- DRM_DEBUG("\n");
+ DRM_DEBUG_KMS("\n");
pp = I915_READ(PCH_PP_CONTROL);
pp |= EDP_BLC_ENABLE;
I915_WRITE(PCH_PP_CONTROL, pp);
}
-static void igdng_edp_backlight_off (struct drm_device *dev)
+static void ironlake_edp_backlight_off (struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 pp;
- DRM_DEBUG("\n");
+ DRM_DEBUG_KMS("\n");
pp = I915_READ(PCH_PP_CONTROL);
pp &= ~EDP_BLC_ENABLE;
I915_WRITE(PCH_PP_CONTROL, pp);
@@ -641,13 +703,13 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode)
if (dp_reg & DP_PORT_EN) {
intel_dp_link_down(intel_output, dp_priv->DP);
if (IS_eDP(intel_output))
- igdng_edp_backlight_off(dev);
+ ironlake_edp_backlight_off(dev);
}
} else {
if (!(dp_reg & DP_PORT_EN)) {
intel_dp_link_train(intel_output, dp_priv->DP, dp_priv->link_configuration);
if (IS_eDP(intel_output))
- igdng_edp_backlight_on(dev);
+ ironlake_edp_backlight_on(dev);
}
}
dp_priv->dpms_mode = mode;
@@ -1010,7 +1072,7 @@ intel_dp_link_down(struct intel_output *intel_output, uint32_t DP)
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_dp_priv *dp_priv = intel_output->dev_priv;
- DRM_DEBUG("\n");
+ DRM_DEBUG_KMS("\n");
if (IS_eDP(intel_output)) {
DP &= ~DP_PLL_ENABLE;
@@ -1071,7 +1133,7 @@ intel_dp_check_link_status(struct intel_output *intel_output)
}
static enum drm_connector_status
-igdng_dp_detect(struct drm_connector *connector)
+ironlake_dp_detect(struct drm_connector *connector)
{
struct intel_output *intel_output = to_intel_output(connector);
struct intel_dp_priv *dp_priv = intel_output->dev_priv;
@@ -1106,8 +1168,8 @@ intel_dp_detect(struct drm_connector *connector)
dp_priv->has_audio = false;
- if (IS_IGDNG(dev))
- return igdng_dp_detect(connector);
+ if (IS_IRONLAKE(dev))
+ return ironlake_dp_detect(connector);
temp = I915_READ(PORT_HOTPLUG_EN);
@@ -1227,7 +1289,53 @@ intel_dp_hot_plug(struct intel_output *intel_output)
if (dp_priv->dpms_mode == DRM_MODE_DPMS_ON)
intel_dp_check_link_status(intel_output);
}
-
+/*
+ * Enumerate the child dev array parsed from VBT to check whether
+ * the given DP is present.
+ * If it is present, return 1.
+ * If it is not present, return false.
+ * If no child dev is parsed from VBT, it is assumed that the given
+ * DP is present.
+ */
+static int dp_is_present_in_vbt(struct drm_device *dev, int dp_reg)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct child_device_config *p_child;
+ int i, dp_port, ret;
+
+ if (!dev_priv->child_dev_num)
+ return 1;
+
+ dp_port = 0;
+ if (dp_reg == DP_B || dp_reg == PCH_DP_B)
+ dp_port = PORT_IDPB;
+ else if (dp_reg == DP_C || dp_reg == PCH_DP_C)
+ dp_port = PORT_IDPC;
+ else if (dp_reg == DP_D || dp_reg == PCH_DP_D)
+ dp_port = PORT_IDPD;
+
+ ret = 0;
+ for (i = 0; i < dev_priv->child_dev_num; i++) {
+ p_child = dev_priv->child_dev + i;
+ /*
+ * If the device type is not DP, continue.
+ */
+ if (p_child->device_type != DEVICE_TYPE_DP &&
+ p_child->device_type != DEVICE_TYPE_eDP)
+ continue;
+ /* Find the eDP port */
+ if (dp_reg == DP_A && p_child->device_type == DEVICE_TYPE_eDP) {
+ ret = 1;
+ break;
+ }
+ /* Find the DP port */
+ if (p_child->dvo_port == dp_port) {
+ ret = 1;
+ break;
+ }
+ }
+ return ret;
+}
void
intel_dp_init(struct drm_device *dev, int output_reg)
{
@@ -1237,6 +1345,10 @@ intel_dp_init(struct drm_device *dev, int output_reg)
struct intel_dp_priv *dp_priv;
const char *name = NULL;
+ if (!dp_is_present_in_vbt(dev, output_reg)) {
+ DRM_DEBUG_KMS("DP is not present. Ignore it\n");
+ return;
+ }
intel_output = kcalloc(sizeof(struct intel_output) +
sizeof(struct intel_dp_priv), 1, GFP_KERNEL);
if (!intel_output)
@@ -1254,11 +1366,11 @@ intel_dp_init(struct drm_device *dev, int output_reg)
else
intel_output->type = INTEL_OUTPUT_DISPLAYPORT;
- if (output_reg == DP_B)
+ if (output_reg == DP_B || output_reg == PCH_DP_B)
intel_output->clone_mask = (1 << INTEL_DP_B_CLONE_BIT);
- else if (output_reg == DP_C)
+ else if (output_reg == DP_C || output_reg == PCH_DP_C)
intel_output->clone_mask = (1 << INTEL_DP_C_CLONE_BIT);
- else if (output_reg == DP_D)
+ else if (output_reg == DP_D || output_reg == PCH_DP_D)
intel_output->clone_mask = (1 << INTEL_DP_D_CLONE_BIT);
if (IS_eDP(intel_output)) {
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-24 11:15:55 +0000