drm/intel: refactor DP i2c support and DP common header to drm helper

[karo-tx-linux.git] / drivers / gpu / drm / drm_dp_i2c_helper.c

diff --git a/drivers/gpu/drm/i915/intel_dp_i2c.c b/drivers/gpu/drm/drm_dp_i2c_helper.c
similarity index 80%
rename from drivers/gpu/drm/i915/intel_dp_i2c.c
rename to drivers/gpu/drm/drm_dp_i2c_helper.c
index a63b6f57d2d4eccf9b22f9cb2bd4c0d1cb229d44..f1c7c856e9db7b32d73598920c8e7247ee0e11f1 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp_i2c.c
+++ b/drivers/gpu/drm/drm_dp_i2c_helper.c
@@ -28,84 +28,20 @@
 #include <linux/errno.h>
 #include <linux/sched.h>
 #include <linux/i2c.h>
-#include "intel_dp.h"
+#include "drm_dp_helper.h"
 #include "drmP.h"
 
 /* Run a single AUX_CH I2C transaction, writing/reading data as necessary */
-
-#define MODE_I2C_START 1
-#define MODE_I2C_WRITE 2
-#define MODE_I2C_READ  4
-#define MODE_I2C_STOP  8
-
 static int
 i2c_algo_dp_aux_transaction(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;
-       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;
-
-       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 = (*algo_data->aux_ch)(adapter,
-                                          msg, msg_bytes,
-                                          reply, reply_bytes);
-               if (ret < 0) {
-                       DRM_DEBUG("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("aux_ch nack\n");
-                       return -EREMOTEIO;
-               case AUX_I2C_REPLY_DEFER:
-                       DRM_DEBUG("aux_ch defer\n");
-                       udelay(100);
-                       break;
-               default:
-                       DRM_ERROR("aux_ch invalid reply 0x%02x\n", reply[0]);
-                       return -EREMOTEIO;
-               }
-       }
+       
+       ret = (*algo_data->aux_ch)(adapter, mode,
+                                  write_byte, read_byte);
+       return ret;
 }
 
 /*