drm/amd/dc: Add dc display driver (v2)

Supported DCE versions: 8.0, 10.0, 11.0, 11.2

v2: rebase against 4.11

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 144 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dc_helper.c b/drivers/gpu/drm/amd/display/dc/dc_helper.c
new file mode 100644
index 000000000000..3a80b0c08ae4
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/dc_helper.c
@@ -0,0 +1,144 @@
+/*
+ * dc_helper.c
+ *
+ *  Created on: Aug 30, 2016
+ *      Author: agrodzov
+ */
+#include "dm_services.h"
+#include <stdarg.h>
+
+uint32_t generic_reg_update_ex(const struct dc_context *ctx,
+		uint32_t addr, uint32_t reg_val, int n,
+		uint8_t shift1, uint32_t mask1, uint32_t field_value1,
+		...)
+{
+	uint32_t shift, mask, field_value;
+	int i = 1;
+
+	va_list ap;
+	va_start(ap, field_value1);
+
+	reg_val = set_reg_field_value_ex(reg_val, field_value1, mask1, shift1);
+
+	while (i < n) {
+		shift = va_arg(ap, uint32_t);
+		mask = va_arg(ap, uint32_t);
+		field_value = va_arg(ap, uint32_t);
+
+		reg_val = set_reg_field_value_ex(reg_val, field_value, mask, shift);
+		i++;
+	}
+
+	dm_write_reg(ctx, addr, reg_val);
+	va_end(ap);
+
+	return reg_val;
+}
+
+uint32_t generic_reg_get(const struct dc_context *ctx, uint32_t addr,
+		uint8_t shift, uint32_t mask, uint32_t *field_value)
+{
+	uint32_t reg_val = dm_read_reg(ctx, addr);
+	*field_value = get_reg_field_value_ex(reg_val, mask, shift);
+	return reg_val;
+}
+
+uint32_t generic_reg_get2(const struct dc_context *ctx, uint32_t addr,
+		uint8_t shift1, uint32_t mask1, uint32_t *field_value1,
+		uint8_t shift2, uint32_t mask2, uint32_t *field_value2)
+{
+	uint32_t reg_val = dm_read_reg(ctx, addr);
+	*field_value1 = get_reg_field_value_ex(reg_val, mask1, shift1);
+	*field_value2 = get_reg_field_value_ex(reg_val, mask2, shift2);
+	return reg_val;
+}
+
+uint32_t generic_reg_get3(const struct dc_context *ctx, uint32_t addr,
+		uint8_t shift1, uint32_t mask1, uint32_t *field_value1,
+		uint8_t shift2, uint32_t mask2, uint32_t *field_value2,
+		uint8_t shift3, uint32_t mask3, uint32_t *field_value3)
+{
+	uint32_t reg_val = dm_read_reg(ctx, addr);
+	*field_value1 = get_reg_field_value_ex(reg_val, mask1, shift1);
+	*field_value2 = get_reg_field_value_ex(reg_val, mask2, shift2);
+	*field_value3 = get_reg_field_value_ex(reg_val, mask3, shift3);
+	return reg_val;
+}
+
+uint32_t generic_reg_get5(const struct dc_context *ctx, uint32_t addr,
+		uint8_t shift1, uint32_t mask1, uint32_t *field_value1,
+		uint8_t shift2, uint32_t mask2, uint32_t *field_value2,
+		uint8_t shift3, uint32_t mask3, uint32_t *field_value3,
+		uint8_t shift4, uint32_t mask4, uint32_t *field_value4,
+		uint8_t shift5, uint32_t mask5, uint32_t *field_value5)
+{
+	uint32_t reg_val = dm_read_reg(ctx, addr);
+	*field_value1 = get_reg_field_value_ex(reg_val, mask1, shift1);
+	*field_value2 = get_reg_field_value_ex(reg_val, mask2, shift2);
+	*field_value3 = get_reg_field_value_ex(reg_val, mask3, shift3);
+	*field_value4 = get_reg_field_value_ex(reg_val, mask4, shift4);
+	*field_value5 = get_reg_field_value_ex(reg_val, mask5, shift5);
+	return reg_val;
+}
+
+/* note:  va version of this is pretty bad idea, since there is a output parameter pass by pointer
+ * compiler won't be able to check for size match and is prone to stack corruption type of bugs
+
+uint32_t generic_reg_get(const struct dc_context *ctx,
+		uint32_t addr, int n, ...)
+{
+	uint32_t shift, mask;
+	uint32_t *field_value;
+	uint32_t reg_val;
+	int i = 0;
+
+	reg_val = dm_read_reg(ctx, addr);
+
+	va_list ap;
+	va_start(ap, n);
+
+	while (i < n) {
+		shift = va_arg(ap, uint32_t);
+		mask = va_arg(ap, uint32_t);
+		field_value = va_arg(ap, uint32_t *);
+
+		*field_value = get_reg_field_value_ex(reg_val, mask, shift);
+		i++;
+	}
+
+	va_end(ap);
+
+	return reg_val;
+}
+*/
+
+uint32_t generic_reg_wait(const struct dc_context *ctx,
+	uint32_t addr, uint32_t shift, uint32_t mask, uint32_t condition_value,
+	unsigned int delay_between_poll_us, unsigned int time_out_num_tries,
+	const char *func_name)
+{
+	uint32_t field_value;
+	uint32_t reg_val;
+	int i;
+
+	for (i = 0; i <= time_out_num_tries; i++) {
+		if (i) {
+			if (0 < delay_between_poll_us && delay_between_poll_us < 1000)
+				udelay(delay_between_poll_us);
+
+			if (delay_between_poll_us > 1000)
+				msleep(delay_between_poll_us/1000);
+		}
+
+		reg_val = dm_read_reg(ctx, addr);
+
+		field_value = get_reg_field_value_ex(reg_val, mask, shift);
+
+		if (field_value == condition_value)
+			return reg_val;
+	}
+
+	DC_ERR("REG_WAIT timeout %dus * %d tries - %s",
+			delay_between_poll_us, time_out_num_tries, func_name);
+	return reg_val;
+}