drm/mgag200: Store positions of I2C data and clock bits in device info

The bits for accessing I2C data and clock channels varies among
models. Store them in the device-info structure for consumption
by the DDC code.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Tested-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220601112522.5774-11-tzimmermann@suse.de

drivers/gpu/drm/mgag200/mgag200_drv.h

@@ -203,6 +203,11 @@ struct mgag200_device_info {
 	/* HW has external source (e.g., BMC) to synchronize with */
 	bool has_vidrst:1;
 
+	struct {
+		unsigned data_bit:3;
+		unsigned clock_bit:3;
+	} i2c;
+
 	/*
 	 * HW does not handle 'startadd' register correctly. Always set
 	 * it's value to 0.
@@ -211,12 +216,17 @@ struct mgag200_device_info {
 };
 
 #define MGAG200_DEVICE_INFO_INIT(_max_hdisplay, _max_vdisplay, _max_mem_bandwidth, \
-				 _has_vidrst, _bug_no_startadd) \
+				 _has_vidrst, _i2c_data_bit, _i2c_clock_bit, \
+				 _bug_no_startadd) \
 	{ \
 		.max_hdisplay = (_max_hdisplay), \
 		.max_vdisplay = (_max_vdisplay), \
 		.max_mem_bandwidth = (_max_mem_bandwidth), \
 		.has_vidrst = (_has_vidrst), \
+		.i2c = { \
+			.data_bit = (_i2c_data_bit), \
+			.clock_bit = (_i2c_clock_bit), \
+		}, \
 		.bug_no_startadd = (_bug_no_startadd), \
 	}
 

drivers/gpu/drm/mgag200/mgag200_g200.c

@@ -34,7 +34,7 @@ static int mgag200_g200_init_pci_options(struct pci_dev *pdev)
  */
 
 static const struct mgag200_device_info mgag200_g200_device_info =
-	MGAG200_DEVICE_INFO_INIT(2048, 2048, 0, false, false);
+	MGAG200_DEVICE_INFO_INIT(2048, 2048, 0, false, 1, 3, false);
 
 static void mgag200_g200_interpret_bios(struct mgag200_g200_device *g200,
 					const unsigned char *bios, size_t size)

drivers/gpu/drm/mgag200/mgag200_g200eh.c

@@ -11,7 +11,7 @@
  */
 
 static const struct mgag200_device_info mgag200_g200eh_device_info =
-	MGAG200_DEVICE_INFO_INIT(2048, 2048, 37500, false, false);
+	MGAG200_DEVICE_INFO_INIT(2048, 2048, 37500, false, 1, 0, false);
 
 struct mga_device *mgag200_g200eh_device_create(struct pci_dev *pdev, const struct drm_driver *drv,
 						enum mga_type type)

drivers/gpu/drm/mgag200/mgag200_g200eh3.c

@@ -11,7 +11,7 @@
  */
 
 static const struct mgag200_device_info mgag200_g200eh3_device_info =
-	MGAG200_DEVICE_INFO_INIT(2048, 2048, 0, false, false);
+	MGAG200_DEVICE_INFO_INIT(2048, 2048, 0, false, 1, 0, false);
 
 struct mga_device *mgag200_g200eh3_device_create(struct pci_dev *pdev,
 						 const struct drm_driver *drv,

drivers/gpu/drm/mgag200/mgag200_g200er.c

@@ -11,7 +11,7 @@
  */
 
 static const struct mgag200_device_info mgag200_g200er_device_info =
-	MGAG200_DEVICE_INFO_INIT(2048, 2048, 55000, false, false);
+	MGAG200_DEVICE_INFO_INIT(2048, 2048, 55000, false, 1, 0, false);
 
 struct mga_device *mgag200_g200er_device_create(struct pci_dev *pdev, const struct drm_driver *drv,
 						enum mga_type type)

drivers/gpu/drm/mgag200/mgag200_g200ev.c

@@ -11,7 +11,7 @@
  */
 
 static const struct mgag200_device_info mgag200_g200ev_device_info =
-	MGAG200_DEVICE_INFO_INIT(2048, 2048, 32700, false, false);
+	MGAG200_DEVICE_INFO_INIT(2048, 2048, 32700, false, 0, 1, false);
 
 struct mga_device *mgag200_g200ev_device_create(struct pci_dev *pdev, const struct drm_driver *drv,
 						enum mga_type type)

drivers/gpu/drm/mgag200/mgag200_g200ew3.c

@@ -11,7 +11,7 @@
  */
 
 static const struct mgag200_device_info mgag200_g200ew3_device_info =
-	MGAG200_DEVICE_INFO_INIT(2048, 2048, 0, true, false);
+	MGAG200_DEVICE_INFO_INIT(2048, 2048, 0, true, 0, 1, false);
 
 static resource_size_t mgag200_g200ew3_device_probe_vram(struct mga_device *mdev)
 {

drivers/gpu/drm/mgag200/mgag200_g200se.c

@@ -33,22 +33,22 @@ static int mgag200_g200se_init_pci_options(struct pci_dev *pdev)
  */
 
 static const struct mgag200_device_info mgag200_g200se_a_01_device_info =
-	MGAG200_DEVICE_INFO_INIT(1600, 1200, 24400, false, true);
+	MGAG200_DEVICE_INFO_INIT(1600, 1200, 24400, false, 0, 1, true);
 
 static const struct mgag200_device_info mgag200_g200se_a_02_device_info =
-	MGAG200_DEVICE_INFO_INIT(1920, 1200, 30100, false, true);
+	MGAG200_DEVICE_INFO_INIT(1920, 1200, 30100, false, 0, 1, true);
 
 static const struct mgag200_device_info mgag200_g200se_a_03_device_info =
-	MGAG200_DEVICE_INFO_INIT(2048, 2048, 55000, false, false);
+	MGAG200_DEVICE_INFO_INIT(2048, 2048, 55000, false, 0, 1, false);
 
 static const struct mgag200_device_info mgag200_g200se_b_01_device_info =
-	MGAG200_DEVICE_INFO_INIT(1600, 1200, 24400, false, false);
+	MGAG200_DEVICE_INFO_INIT(1600, 1200, 24400, false, 0, 1, false);
 
 static const struct mgag200_device_info mgag200_g200se_b_02_device_info =
-	MGAG200_DEVICE_INFO_INIT(1920, 1200, 30100, false, false);
+	MGAG200_DEVICE_INFO_INIT(1920, 1200, 30100, false, 0, 1, false);
 
 static const struct mgag200_device_info mgag200_g200se_b_03_device_info =
-	MGAG200_DEVICE_INFO_INIT(2048, 2048, 55000, false, false);
+	MGAG200_DEVICE_INFO_INIT(2048, 2048, 55000, false, 0, 1, false);
 
 static int mgag200_g200se_init_unique_rev_id(struct mgag200_g200se_device *g200se)
 {

drivers/gpu/drm/mgag200/mgag200_g200wb.c

@@ -11,7 +11,7 @@
  */
 
 static const struct mgag200_device_info mgag200_g200wb_device_info =
-	MGAG200_DEVICE_INFO_INIT(1280, 1024, 31877, true, false);
+	MGAG200_DEVICE_INFO_INIT(1280, 1024, 31877, true, 0, 1, false);
 
 struct mga_device *mgag200_g200wb_device_create(struct pci_dev *pdev, const struct drm_driver *drv,
 						enum mga_type type)

drivers/gpu/drm/mgag200/mgag200_i2c.c

@@ -96,36 +96,15 @@ static void mgag200_i2c_release(void *res)
 int mgag200_i2c_init(struct mga_device *mdev, struct mga_i2c_chan *i2c)
 {
 	struct drm_device *dev = &mdev->base;
+	const struct mgag200_device_info *info = mdev->info;
 	int ret;
-	int data, clock;
 
 	WREG_DAC(MGA1064_GEN_IO_CTL2, 1);
 	WREG_DAC(MGA1064_GEN_IO_DATA, 0xff);
 	WREG_DAC(MGA1064_GEN_IO_CTL, 0);
 
-	switch (mdev->type) {
-	case G200_SE_A:
-	case G200_SE_B:
-	case G200_EV:
-	case G200_WB:
-	case G200_EW3:
-		data = 1;
-		clock = 2;
-		break;
-	case G200_EH:
-	case G200_EH3:
-	case G200_ER:
-		data = 2;
-		clock = 1;
-		break;
-	default:
-		data = 2;
-		clock = 8;
-		break;
-	}
-
-	i2c->data = data;
-	i2c->clock = clock;
+	i2c->data = BIT(info->i2c.data_bit);
+	i2c->clock = BIT(info->i2c.clock_bit);
 	i2c->adapter.owner = THIS_MODULE;
 	i2c->adapter.class = I2C_CLASS_DDC;
 	i2c->adapter.dev.parent = dev->dev;