drm/ast: Move I2C code into separate source file

Move I2C code into its own source file. Makes the mode-setting
code a little less convoluted.

v3:
	* fix SPDX tag to say 'SPDX-License-Identifier'

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20211206091125.29501-4-tzimmermann@suse.de

1 files changed, 0 insertions, 128 deletions

diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index abb8a3fdd812..44c2aafcb7c2 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -40,7 +40,6 @@
 #include <drm/drm_gem_atomic_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_gem_vram_helper.h>
-#include <drm/drm_managed.h>
 #include <drm/drm_plane_helper.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_simple_kms_helper.h>
@@ -48,8 +47,6 @@
 #include "ast_drv.h"
 #include "ast_tables.h"
 
-static struct ast_i2c_chan *ast_i2c_create(struct drm_device *dev);
-
 static inline void ast_load_palette_index(struct ast_private *ast,
 				     u8 index, u8 red, u8 green,
 				     u8 blue)
@@ -1408,128 +1405,3 @@ int ast_mode_config_init(struct ast_private *ast)
 
 	return 0;
 }
-
-static int get_clock(void *i2c_priv)
-{
-	struct ast_i2c_chan *i2c = i2c_priv;
-	struct ast_private *ast = to_ast_private(i2c->dev);
-	uint32_t val, val2, count, pass;
-
-	count = 0;
-	pass = 0;
-	val = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x10) >> 4) & 0x01;
-	do {
-		val2 = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x10) >> 4) & 0x01;
-		if (val == val2) {
-			pass++;
-		} else {
-			pass = 0;
-			val = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x10) >> 4) & 0x01;
-		}
-	} while ((pass < 5) && (count++ < 0x10000));
-
-	return val & 1 ? 1 : 0;
-}
-
-static int get_data(void *i2c_priv)
-{
-	struct ast_i2c_chan *i2c = i2c_priv;
-	struct ast_private *ast = to_ast_private(i2c->dev);
-	uint32_t val, val2, count, pass;
-
-	count = 0;
-	pass = 0;
-	val = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x20) >> 5) & 0x01;
-	do {
-		val2 = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x20) >> 5) & 0x01;
-		if (val == val2) {
-			pass++;
-		} else {
-			pass = 0;
-			val = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x20) >> 5) & 0x01;
-		}
-	} while ((pass < 5) && (count++ < 0x10000));
-
-	return val & 1 ? 1 : 0;
-}
-
-static void set_clock(void *i2c_priv, int clock)
-{
-	struct ast_i2c_chan *i2c = i2c_priv;
-	struct ast_private *ast = to_ast_private(i2c->dev);
-	int i;
-	u8 ujcrb7, jtemp;
-
-	for (i = 0; i < 0x10000; i++) {
-		ujcrb7 = ((clock & 0x01) ? 0 : 1);
-		ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0xf4, ujcrb7);
-		jtemp = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x01);
-		if (ujcrb7 == jtemp)
-			break;
-	}
-}
-
-static void set_data(void *i2c_priv, int data)
-{
-	struct ast_i2c_chan *i2c = i2c_priv;
-	struct ast_private *ast = to_ast_private(i2c->dev);
-	int i;
-	u8 ujcrb7, jtemp;
-
-	for (i = 0; i < 0x10000; i++) {
-		ujcrb7 = ((data & 0x01) ? 0 : 1) << 2;
-		ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0xf1, ujcrb7);
-		jtemp = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x04);
-		if (ujcrb7 == jtemp)
-			break;
-	}
-}
-
-static void ast_i2c_release(struct drm_device *dev, void *res)
-{
-	struct ast_i2c_chan *i2c = res;
-
-	i2c_del_adapter(&i2c->adapter);
-	kfree(i2c);
-}
-
-static struct ast_i2c_chan *ast_i2c_create(struct drm_device *dev)
-{
-	struct ast_i2c_chan *i2c;
-	int ret;
-
-	i2c = kzalloc(sizeof(struct ast_i2c_chan), GFP_KERNEL);
-	if (!i2c)
-		return NULL;
-
-	i2c->adapter.owner = THIS_MODULE;
-	i2c->adapter.class = I2C_CLASS_DDC;
-	i2c->adapter.dev.parent = dev->dev;
-	i2c->dev = dev;
-	i2c_set_adapdata(&i2c->adapter, i2c);
-	snprintf(i2c->adapter.name, sizeof(i2c->adapter.name),
-		 "AST i2c bit bus");
-	i2c->adapter.algo_data = &i2c->bit;
-
-	i2c->bit.udelay = 20;
-	i2c->bit.timeout = 2;
-	i2c->bit.data = i2c;
-	i2c->bit.setsda = set_data;
-	i2c->bit.setscl = set_clock;
-	i2c->bit.getsda = get_data;
-	i2c->bit.getscl = get_clock;
-	ret = i2c_bit_add_bus(&i2c->adapter);
-	if (ret) {
-		drm_err(dev, "Failed to register bit i2c\n");
-		goto out_kfree;
-	}
-
-	ret = drmm_add_action_or_reset(dev, ast_i2c_release, i2c);
-	if (ret)
-		return NULL;
-	return i2c;
-
-out_kfree:
-	kfree(i2c);
-	return NULL;
-}