drm/amd/display: refclock from bios firmwareInfoTable

Signed-off-by: Charlene Liu <charlene.liu@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc.c

@@ -467,6 +467,8 @@ static bool construct(struct core_dc *dc,
 	else {
 		/* Create BIOS parser */
 		struct bp_init_data bp_init_data;
+		struct firmware_info fw_info = { { 0 } };
+
 		bp_init_data.ctx = dc_ctx;
 		bp_init_data.bios = init_params->asic_id.atombios_base_address;
 
@@ -479,7 +481,13 @@ static bool construct(struct core_dc *dc,
 		}
 
 		dc_ctx->created_bios = true;
-	}
+
+		if (dc_ctx->dc_bios->funcs->get_firmware_info(
+				dc_ctx->dc_bios, &fw_info) == BP_RESULT_OK) {
+				dc->ctx->ref_clock_inKhz = fw_info.pll_info.crystal_frequency;
+		} else
+			ASSERT_CRITICAL(false);
+		}
 
 	/* Create I2C AUX */
 	dc_ctx->i2caux = dal_i2caux_create(dc_ctx);

drivers/gpu/drm/amd/display/dc/core/dc_stream.c

@@ -237,7 +237,7 @@ bool dc_stream_set_cursor_position(
 			struct input_pixel_processor *ipp = pipe_ctx->ipp;
 			struct dc_cursor_mi_param param = {
 				.pixel_clk_khz = dc_stream->timing.pix_clk_khz,
-				.ref_clk_khz = 48000,/*todo refclk*/
+				.ref_clk_khz = core_dc->ctx->ref_clock_inKhz,
 				.viewport_x_start = pipe_ctx->scl_data.viewport.x,
 				.viewport_width = pipe_ctx->scl_data.viewport.width,
 				.h_scale_ratio = pipe_ctx->scl_data.ratios.horz,

drivers/gpu/drm/amd/display/dc/dc_types.h

@@ -91,6 +91,7 @@ struct dc_context {
 	bool created_bios;
 	struct gpio_service *gpio_service;
 	struct i2caux *i2caux;
+	unsigned int ref_clock_inKhz;
 };
 
 

drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c

@@ -1230,17 +1230,12 @@ bool dce110_clk_src_construct(
 			goto unexpected_failure;
 		}
 
-		if (clk_src->ref_freq_khz == 48000) {
-			calc_pll_cs_init_data_hdmi.
-				min_override_input_pxl_clk_pll_freq_khz = 24000;
-			calc_pll_cs_init_data_hdmi.
-				max_override_input_pxl_clk_pll_freq_khz = 48000;
-		} else if (clk_src->ref_freq_khz == 100000) {
-			calc_pll_cs_init_data_hdmi.
-				min_override_input_pxl_clk_pll_freq_khz = 25000;
-			calc_pll_cs_init_data_hdmi.
-				max_override_input_pxl_clk_pll_freq_khz = 50000;
-		}
+
+		calc_pll_cs_init_data_hdmi.
+				min_override_input_pxl_clk_pll_freq_khz = clk_src->ref_freq_khz/2;
+		calc_pll_cs_init_data_hdmi.
+				max_override_input_pxl_clk_pll_freq_khz = clk_src->ref_freq_khz;
+
 
 		if (!calc_pll_max_vco_construct(
 				&clk_src->calc_pll_hdmi, &calc_pll_cs_init_data_hdmi)) {