drm: rename drm_dp_i2c_helper.c to drm_dp_helper.c

I want to move some dp link training helpers into this place, so in
the future this won't be just about i2c any longer.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 2ff5cefe9eadd106fe1e611c19388d097716ccb8..dc4e88f9fb110350fed7699e700ab92ab8a946ec 100644 (file)
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -19,7 +19,7 @@ drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o
 
 drm-usb-y   := drm_usb.o
 
-drm_kms_helper-y := drm_fb_helper.o drm_crtc_helper.o drm_dp_i2c_helper.o
+drm_kms_helper-y := drm_fb_helper.o drm_crtc_helper.o drm_dp_helper.o
 drm_kms_helper-$(CONFIG_DRM_LOAD_EDID_FIRMWARE) += drm_edid_load.o
 drm_kms_helper-$(CONFIG_DRM_KMS_CMA_HELPER) += drm_fb_cma_helper.o
 

diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
new file mode 100644 (file)
index 0000000..bb4eaf6
--- /dev/null
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -0,0 +1,207 @@
+/*
+ * Copyright © 2009 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/i2c.h>
+#include <drm/drm_dp_helper.h>
+#include <drm/drmP.h>
+
+/* Run a single AUX_CH I2C transaction, writing/reading data as necessary */
+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;
+       int ret;
+
+       ret = (*algo_data->aux_ch)(adapter, mode,
+                                  write_byte, read_byte);
+       return ret;
+}
+
+/*
+ * I2C over AUX CH
+ */
+
+/*
+ * Send the address. If the I2C link is running, this 'restarts'
+ * the connection with the new address, this is used for doing
+ * a write followed by a read (as needed for DDC)
+ */
+static int
+i2c_algo_dp_aux_address(struct i2c_adapter *adapter, u16 address, bool reading)
+{
+       struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
+       int mode = MODE_I2C_START;
+       int ret;
+
+       if (reading)
+               mode |= MODE_I2C_READ;
+       else
+               mode |= MODE_I2C_WRITE;
+       algo_data->address = address;
+       algo_data->running = true;
+       ret = i2c_algo_dp_aux_transaction(adapter, mode, 0, NULL);
+       return ret;
+}
+
+/*
+ * Stop the I2C transaction. This closes out the link, sending
+ * a bare address packet with the MOT bit turned off
+ */
+static void
+i2c_algo_dp_aux_stop(struct i2c_adapter *adapter, bool reading)
+{
+       struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
+       int mode = MODE_I2C_STOP;
+
+       if (reading)
+               mode |= MODE_I2C_READ;
+       else
+               mode |= MODE_I2C_WRITE;
+       if (algo_data->running) {
+               (void) i2c_algo_dp_aux_transaction(adapter, mode, 0, NULL);
+               algo_data->running = false;
+       }
+}
+
+/*
+ * Write a single byte to the current I2C address, the
+ * the I2C link must be running or this returns -EIO
+ */
+static int
+i2c_algo_dp_aux_put_byte(struct i2c_adapter *adapter, u8 byte)
+{
+       struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
+       int ret;
+
+       if (!algo_data->running)
+               return -EIO;
+
+       ret = i2c_algo_dp_aux_transaction(adapter, MODE_I2C_WRITE, byte, NULL);
+       return ret;
+}
+
+/*
+ * Read a single byte from the current I2C address, the
+ * I2C link must be running or this returns -EIO
+ */
+static int
+i2c_algo_dp_aux_get_byte(struct i2c_adapter *adapter, u8 *byte_ret)
+{
+       struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
+       int ret;
+
+       if (!algo_data->running)
+               return -EIO;
+
+       ret = i2c_algo_dp_aux_transaction(adapter, MODE_I2C_READ, 0, byte_ret);
+       return ret;
+}
+
+static int
+i2c_algo_dp_aux_xfer(struct i2c_adapter *adapter,
+                    struct i2c_msg *msgs,
+                    int num)
+{
+       int ret = 0;
+       bool reading = false;
+       int m;
+       int b;
+
+       for (m = 0; m < num; m++) {
+               u16 len = msgs[m].len;
+               u8 *buf = msgs[m].buf;
+               reading = (msgs[m].flags & I2C_M_RD) != 0;
+               ret = i2c_algo_dp_aux_address(adapter, msgs[m].addr, reading);
+               if (ret < 0)
+                       break;
+               if (reading) {
+                       for (b = 0; b < len; b++) {
+                               ret = i2c_algo_dp_aux_get_byte(adapter, &buf[b]);
+                               if (ret < 0)
+                                       break;
+                       }
+               } else {
+                       for (b = 0; b < len; b++) {
+                               ret = i2c_algo_dp_aux_put_byte(adapter, buf[b]);
+                               if (ret < 0)
+                                       break;
+                       }
+               }
+               if (ret < 0)
+                       break;
+       }
+       if (ret >= 0)
+               ret = num;
+       i2c_algo_dp_aux_stop(adapter, reading);
+       DRM_DEBUG_KMS("dp_aux_xfer return %d\n", ret);
+       return ret;
+}
+
+static u32
+i2c_algo_dp_aux_functionality(struct i2c_adapter *adapter)
+{
+       return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL |
+              I2C_FUNC_SMBUS_READ_BLOCK_DATA |
+              I2C_FUNC_SMBUS_BLOCK_PROC_CALL |
+              I2C_FUNC_10BIT_ADDR;
+}
+
+static const struct i2c_algorithm i2c_dp_aux_algo = {
+       .master_xfer    = i2c_algo_dp_aux_xfer,
+       .functionality  = i2c_algo_dp_aux_functionality,
+};
+
+static void
+i2c_dp_aux_reset_bus(struct i2c_adapter *adapter)
+{
+       (void) i2c_algo_dp_aux_address(adapter, 0, false);
+       (void) i2c_algo_dp_aux_stop(adapter, false);
+}
+
+static int
+i2c_dp_aux_prepare_bus(struct i2c_adapter *adapter)
+{
+       adapter->algo = &i2c_dp_aux_algo;
+       adapter->retries = 3;
+       i2c_dp_aux_reset_bus(adapter);
+       return 0;
+}
+
+int
+i2c_dp_aux_add_bus(struct i2c_adapter *adapter)
+{
+       int error;
+
+       error = i2c_dp_aux_prepare_bus(adapter);
+       if (error)
+               return error;
+       error = i2c_add_adapter(adapter);
+       return error;
+}
+EXPORT_SYMBOL(i2c_dp_aux_add_bus);

diff --git a/drivers/gpu/drm/drm_dp_i2c_helper.c b/drivers/gpu/drm/drm_dp_i2c_helper.c
deleted file mode 100644 (file)
index 7f246f2..0000000
--- a/drivers/gpu/drm/drm_dp_i2c_helper.c
+++ /dev/null
@@ -1,208 +0,0 @@
-/*
- * Copyright © 2009 Keith Packard
- *
- * Permission to use, copy, modify, distribute, and sell this software and its
- * documentation for any purpose is hereby granted without fee, provided that
- * the above copyright notice appear in all copies and that both that copyright
- * notice and this permission notice appear in supporting documentation, and
- * that the name of the copyright holders not be used in advertising or
- * publicity pertaining to distribution of the software without specific,
- * written prior permission.  The copyright holders make no representations
- * about the suitability of this software for any purpose.  It is provided "as
- * is" without express or implied warranty.
- *
- * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
- * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
- * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
- * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
- * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
- * OF THIS SOFTWARE.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/i2c.h>
-#include <drm/drm_dp_helper.h>
-#include <drm/drmP.h>
-
-/* Run a single AUX_CH I2C transaction, writing/reading data as necessary */
-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;
-       int ret;
-       
-       ret = (*algo_data->aux_ch)(adapter, mode,
-                                  write_byte, read_byte);
-       return ret;
-}
-
-/*
- * I2C over AUX CH
- */
-
-/*
- * Send the address. If the I2C link is running, this 'restarts'
- * the connection with the new address, this is used for doing
- * a write followed by a read (as needed for DDC)
- */
-static int
-i2c_algo_dp_aux_address(struct i2c_adapter *adapter, u16 address, bool reading)
-{
-       struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
-       int mode = MODE_I2C_START;
-       int ret;
-
-       if (reading)
-               mode |= MODE_I2C_READ;
-       else
-               mode |= MODE_I2C_WRITE;
-       algo_data->address = address;
-       algo_data->running = true;
-       ret = i2c_algo_dp_aux_transaction(adapter, mode, 0, NULL);
-       return ret;
-}
-
-/*
- * Stop the I2C transaction. This closes out the link, sending
- * a bare address packet with the MOT bit turned off
- */
-static void
-i2c_algo_dp_aux_stop(struct i2c_adapter *adapter, bool reading)
-{
-       struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
-       int mode = MODE_I2C_STOP;
-
-       if (reading)
-               mode |= MODE_I2C_READ;
-       else
-               mode |= MODE_I2C_WRITE;
-       if (algo_data->running) {
-               (void) i2c_algo_dp_aux_transaction(adapter, mode, 0, NULL);
-               algo_data->running = false;
-       }
-}
-
-/*
- * Write a single byte to the current I2C address, the
- * the I2C link must be running or this returns -EIO
- */
-static int
-i2c_algo_dp_aux_put_byte(struct i2c_adapter *adapter, u8 byte)
-{
-       struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
-       int ret;
-
-       if (!algo_data->running)
-               return -EIO;
-
-       ret = i2c_algo_dp_aux_transaction(adapter, MODE_I2C_WRITE, byte, NULL);
-       return ret;
-}
-
-/*
- * Read a single byte from the current I2C address, the
- * I2C link must be running or this returns -EIO
- */
-static int
-i2c_algo_dp_aux_get_byte(struct i2c_adapter *adapter, u8 *byte_ret)
-{
-       struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
-       int ret;
-
-       if (!algo_data->running)
-               return -EIO;
-
-       ret = i2c_algo_dp_aux_transaction(adapter, MODE_I2C_READ, 0, byte_ret);
-       return ret;
-}
-
-static int
-i2c_algo_dp_aux_xfer(struct i2c_adapter *adapter,
-                    struct i2c_msg *msgs,
-                    int num)
-{
-       int ret = 0;
-       bool reading = false;
-       int m;
-       int b;
-
-       for (m = 0; m < num; m++) {
-               u16 len = msgs[m].len;
-               u8 *buf = msgs[m].buf;
-               reading = (msgs[m].flags & I2C_M_RD) != 0;
-               ret = i2c_algo_dp_aux_address(adapter, msgs[m].addr, reading);
-               if (ret < 0)
-                       break;
-               if (reading) {
-                       for (b = 0; b < len; b++) {
-                               ret = i2c_algo_dp_aux_get_byte(adapter, &buf[b]);
-                               if (ret < 0)
-                                       break;
-                       }
-               } else {
-                       for (b = 0; b < len; b++) {
-                               ret = i2c_algo_dp_aux_put_byte(adapter, buf[b]);
-                               if (ret < 0)
-                                       break;
-                       }
-               }
-               if (ret < 0)
-                       break;
-       }
-       if (ret >= 0)
-               ret = num;
-       i2c_algo_dp_aux_stop(adapter, reading);
-       DRM_DEBUG_KMS("dp_aux_xfer return %d\n", ret);
-       return ret;
-}
-
-static u32
-i2c_algo_dp_aux_functionality(struct i2c_adapter *adapter)
-{
-       return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL |
-              I2C_FUNC_SMBUS_READ_BLOCK_DATA |
-              I2C_FUNC_SMBUS_BLOCK_PROC_CALL |
-              I2C_FUNC_10BIT_ADDR;
-}
-
-static const struct i2c_algorithm i2c_dp_aux_algo = {
-       .master_xfer    = i2c_algo_dp_aux_xfer,
-       .functionality  = i2c_algo_dp_aux_functionality,
-};
-
-static void
-i2c_dp_aux_reset_bus(struct i2c_adapter *adapter)
-{
-       (void) i2c_algo_dp_aux_address(adapter, 0, false);
-       (void) i2c_algo_dp_aux_stop(adapter, false);
-                                          
-}
-
-static int
-i2c_dp_aux_prepare_bus(struct i2c_adapter *adapter)
-{
-       adapter->algo = &i2c_dp_aux_algo;
-       adapter->retries = 3;
-       i2c_dp_aux_reset_bus(adapter);
-       return 0;
-}
-
-int
-i2c_dp_aux_add_bus(struct i2c_adapter *adapter)
-{
-       int error;
-       
-       error = i2c_dp_aux_prepare_bus(adapter);
-       if (error)
-               return error;
-       error = i2c_add_adapter(adapter);
-       return error;
-}
-EXPORT_SYMBOL(i2c_dp_aux_add_bus);