[PATCH v2 3/3] drm/ast: Move I2C code into separate source file
Thomas Zimmermann
tzimmermann at suse.de
Mon Dec 6 09:11:25 UTC 2021
Move I2C code into its own source file. Makes the mode-setting
code a little less convoluted.
Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
drivers/gpu/drm/ast/Makefile | 2 +-
drivers/gpu/drm/ast/ast_drv.h | 3 +
drivers/gpu/drm/ast/ast_i2c.c | 152 +++++++++++++++++++++++++++++++++
drivers/gpu/drm/ast/ast_mode.c | 128 ---------------------------
4 files changed, 156 insertions(+), 129 deletions(-)
create mode 100644 drivers/gpu/drm/ast/ast_i2c.c
diff --git a/drivers/gpu/drm/ast/Makefile b/drivers/gpu/drm/ast/Makefile
index 438a2d05b115..21f71160bc3e 100644
--- a/drivers/gpu/drm/ast/Makefile
+++ b/drivers/gpu/drm/ast/Makefile
@@ -3,6 +3,6 @@
# Makefile for the drm device driver. This driver provides support for the
# Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
-ast-y := ast_drv.o ast_main.o ast_mm.o ast_mode.o ast_post.o ast_dp501.o
+ast-y := ast_drv.o ast_i2c.o ast_main.o ast_mm.o ast_mode.o ast_post.o ast_dp501.o
obj-$(CONFIG_DRM_AST) := ast.o
diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index 2cfce7dc95af..00bfa41ff7cb 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -357,4 +357,7 @@ bool ast_dp501_read_edid(struct drm_device *dev, u8 *ediddata);
u8 ast_get_dp501_max_clk(struct drm_device *dev);
void ast_init_3rdtx(struct drm_device *dev);
+/* ast_i2c.c */
+struct ast_i2c_chan *ast_i2c_create(struct drm_device *dev);
+
#endif
diff --git a/drivers/gpu/drm/ast/ast_i2c.c b/drivers/gpu/drm/ast/ast_i2c.c
new file mode 100644
index 000000000000..8e4589d74b21
--- /dev/null
+++ b/drivers/gpu/drm/ast/ast_i2c.c
@@ -0,0 +1,152 @@
+// SPDX-License: MIT
+/*
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ */
+
+#include <drm/drm_managed.h>
+#include <drm/drm_print.h>
+
+#include "ast_drv.h"
+
+static void ast_i2c_setsda(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_setscl(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 int ast_i2c_getsda(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 int ast_i2c_getscl(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 void ast_i2c_release(struct drm_device *dev, void *res)
+{
+ struct ast_i2c_chan *i2c = res;
+
+ i2c_del_adapter(&i2c->adapter);
+ kfree(i2c);
+}
+
+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 = ast_i2c_setsda;
+ i2c->bit.setscl = ast_i2c_setscl;
+ i2c->bit.getsda = ast_i2c_getsda;
+ i2c->bit.getscl = ast_i2c_getscl;
+ 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;
+}
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;
-}
--
2.34.1
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