From: Dillon Varone <dillon.varone@xxxxxxx>
[Why & How]
Ported logic from dcn21 for reading in pipe fusing to dcn30.
Supported configurations are 1 and 6 pipes. Invalid fusing
will revert to 1 pipe being enabled.
Signed-off-by: Dillon Varone <dillon.varone@xxxxxxx>
Reviewed-by: Jun Lei <Jun.Lei@xxxxxxx>
Acked-by: Eryk Brol <eryk.brol@xxxxxxx>
---
.../drm/amd/display/dc/dcn30/dcn30_resource.c | 31 +++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
index f85765cc73f4..71e2d5e02571 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
@@ -2508,6 +2508,19 @@ static const struct resource_funcs dcn30_res_pool_funcs = {
.patch_unknown_plane_state = dcn20_patch_unknown_plane_state,
};
+#define CTX ctx
+
+#define REG(reg_name) \
+ (DCN_BASE.instance[0].segment[mm ## reg_name ## _BASE_IDX] + mm ## reg_name)
+
+static uint32_t read_pipe_fuses(struct dc_context *ctx)
+{
+ uint32_t value = REG_READ(CC_DC_PIPE_DIS);
+ /* Support for max 6 pipes */
+ value = value & 0x3f;
+ return value;
+}
+
static bool dcn30_resource_construct(
uint8_t num_virtual_links,
struct dc *dc,
@@ -2517,6 +2530,15 @@ static bool dcn30_resource_construct(
struct dc_context *ctx = dc->ctx;
struct irq_service_init_data init_data;
struct ddc_service_init_data ddc_init_data;
+ uint32_t pipe_fuses = read_pipe_fuses(ctx);
+ uint32_t num_pipes = 0;
+
+ if (!(pipe_fuses == 0 || pipe_fuses == 0x3e)) {
+ BREAK_TO_DEBUGGER();
+ dm_error("DC: Unexpected fuse recipe for navi2x !\n");
+ /* fault to single pipe */
+ pipe_fuses = 0x3e;
+ }
DC_FP_START();
@@ -2650,6 +2672,15 @@ static bool dcn30_resource_construct(
/* PP Lib and SMU interfaces */
init_soc_bounding_box(dc, pool);
+ num_pipes = dcn3_0_ip.max_num_dpp;
+
+ for (i = 0; i < dcn3_0_ip.max_num_dpp; i++)
+ if (pipe_fuses & 1 << i)
+ num_pipes--;
+
+ dcn3_0_ip.max_num_dpp = num_pipes;
+ dcn3_0_ip.max_num_otg = num_pipes;
+
dml_init_instance(&dc->dml, &dcn3_0_soc, &dcn3_0_ip, DML_PROJECT_DCN30);
/* IRQ */
--
2.25.1
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