[PATCH] drm/amdgpu/display: actually execute the atom command table in adjust_display_pll_v2

[PATCH] drm/amdgpu/display: actually execute the atom command table in adjust_display_pll_v2

[Alex Deucher]

We should execute the table to see if we need to adjust the pixel clock.
That said, I'm not sure this version of the atom table is actually
in use on any asics supported by amdgpu.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 .../drm/amd/display/dc/bios/command_table.c   | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/bios/command_table.c b/drivers/gpu/drm/amd/display/dc/bios/command_table.c
index 070459e3e407..41999223903d 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/command_table.c
+++ b/drivers/gpu/drm/amd/display/dc/bios/command_table.c
@@ -1470,6 +1470,30 @@ static enum bp_result adjust_display_pll_v2(
 	params.ucEncodeMode =
 			(uint8_t)bp->cmd_helper->encoder_mode_bp_to_atom(
 					bp_params->signal_type, false);
+
+	if (bp_params->ss_enable == true)
+		params.ucConfig |= DISPPLL_CONFIG_SS_ENABLE;
+
+	if (EXEC_BIOS_CMD_TABLE(AdjustDisplayPll, params)) {
+		/* Convert output pixel clock back 10KHz-->KHz: multiply
+		 * original pixel clock in KHz by ratio
+		 * [output pxlClk/input pxlClk] */
+		uint64_t pixel_clk_10_khz_out =
+				(uint64_t)le16_to_cpu(params.usPixelClock);
+		uint64_t pixel_clk = (uint64_t)bp_params->pixel_clock;
+
+		if (pixel_clock_10KHz_in != 0) {
+			bp_params->adjusted_pixel_clock =
+					div_u64(pixel_clk * pixel_clk_10_khz_out,
+						pixel_clock_10KHz_in);
+		} else {
+			bp_params->adjusted_pixel_clock = 0;
+			BREAK_TO_DEBUGGER();
+		}
+
+		result = BP_RESULT_OK;
+	}
+
 	return result;
 }
 
-- 
2.29.2

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