From: Timur Kristóf <timur.kristof@gmail.com>
Date: Mon, 26 Jan 2026 21:08:27 +0000 (+0100)
Subject: drm/amd/display: Add color depth helper function to BIOS parser
X-Git-Tag: v7.1-rc1~167^2~31^2~121
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=2e26056f36ebe69608197d6a26a2abb7d11e2aad;p=thirdparty%2Fkernel%2Flinux.git

drm/amd/display: Add color depth helper function to BIOS parser

To improve consistency and avoid duplicating the same code.
Also, properly handle all enum values where they weren't
handled correctly before.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

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 b692fa37402d9..fdc699b8c7a56 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/command_table.c
+++ b/drivers/gpu/drm/amd/display/dc/bios/command_table.c
@@ -226,6 +226,28 @@ static enum bp_result encoder_control_dig2_v1(
 	return result;
 }
 
+static uint8_t dc_color_depth_to_atom(enum dc_color_depth color_depth)
+{
+	switch (color_depth) {
+	case COLOR_DEPTH_UNDEFINED:
+		return PANEL_BPC_UNDEFINE;
+	case COLOR_DEPTH_666:
+		return PANEL_6BIT_PER_COLOR;
+	default:
+	case COLOR_DEPTH_888:
+		return PANEL_8BIT_PER_COLOR;
+	case COLOR_DEPTH_101010:
+		return PANEL_10BIT_PER_COLOR;
+	case COLOR_DEPTH_121212:
+		return PANEL_12BIT_PER_COLOR;
+	case COLOR_DEPTH_141414:
+		dm_error("14-bit color not supported by ATOMBIOS\n");
+		return PANEL_BPC_UNDEFINE;
+	case COLOR_DEPTH_161616:
+		return PANEL_16BIT_PER_COLOR;
+	}
+}
+
 static enum bp_result encoder_control_digx_v3(
 	struct bios_parser *bp,
 	struct bp_encoder_control *cntl)
@@ -248,23 +270,7 @@ static enum bp_result encoder_control_digx_v3(
 					cntl->signal,
 					cntl->enable_dp_audio);
 	params.ucLaneNum = (uint8_t)(cntl->lanes_number);
-
-	switch (cntl->color_depth) {
-	case COLOR_DEPTH_888:
-		params.ucBitPerColor = PANEL_8BIT_PER_COLOR;
-		break;
-	case COLOR_DEPTH_101010:
-		params.ucBitPerColor = PANEL_10BIT_PER_COLOR;
-		break;
-	case COLOR_DEPTH_121212:
-		params.ucBitPerColor = PANEL_12BIT_PER_COLOR;
-		break;
-	case COLOR_DEPTH_161616:
-		params.ucBitPerColor = PANEL_16BIT_PER_COLOR;
-		break;
-	default:
-		break;
-	}
+	params.ucBitPerColor = dc_color_depth_to_atom(cntl->color_depth);
 
 	if (EXEC_BIOS_CMD_TABLE(DIGxEncoderControl, params))
 		result = BP_RESULT_OK;
@@ -294,23 +300,7 @@ static enum bp_result encoder_control_digx_v4(
 					cntl->signal,
 					cntl->enable_dp_audio));
 	params.ucLaneNum = (uint8_t)(cntl->lanes_number);
-
-	switch (cntl->color_depth) {
-	case COLOR_DEPTH_888:
-		params.ucBitPerColor = PANEL_8BIT_PER_COLOR;
-		break;
-	case COLOR_DEPTH_101010:
-		params.ucBitPerColor = PANEL_10BIT_PER_COLOR;
-		break;
-	case COLOR_DEPTH_121212:
-		params.ucBitPerColor = PANEL_12BIT_PER_COLOR;
-		break;
-	case COLOR_DEPTH_161616:
-		params.ucBitPerColor = PANEL_16BIT_PER_COLOR;
-		break;
-	default:
-		break;
-	}
+	params.ucBitPerColor = dc_color_depth_to_atom(cntl->color_depth);
 
 	if (EXEC_BIOS_CMD_TABLE(DIGxEncoderControl, params))
 		result = BP_RESULT_OK;
@@ -334,23 +324,7 @@ static enum bp_result encoder_control_digx_v5(
 					cntl->signal,
 					cntl->enable_dp_audio));
 	params.ucLaneNum = (uint8_t)(cntl->lanes_number);
-
-	switch (cntl->color_depth) {
-	case COLOR_DEPTH_888:
-		params.ucBitPerColor = PANEL_8BIT_PER_COLOR;
-		break;
-	case COLOR_DEPTH_101010:
-		params.ucBitPerColor = PANEL_10BIT_PER_COLOR;
-		break;
-	case COLOR_DEPTH_121212:
-		params.ucBitPerColor = PANEL_12BIT_PER_COLOR;
-		break;
-	case COLOR_DEPTH_161616:
-		params.ucBitPerColor = PANEL_16BIT_PER_COLOR;
-		break;
-	default:
-		break;
-	}
+	params.ucBitPerColor = dc_color_depth_to_atom(cntl->color_depth);
 
 	if (cntl->signal == SIGNAL_TYPE_HDMI_TYPE_A)
 		switch (cntl->color_depth) {
@@ -1797,30 +1771,7 @@ static enum bp_result select_crtc_source_v3(
 		&params.ucEncodeMode))
 		return BP_RESULT_BADINPUT;
 
-	switch (bp_params->color_depth) {
-	case COLOR_DEPTH_UNDEFINED:
-		params.ucDstBpc = PANEL_BPC_UNDEFINE;
-		break;
-	case COLOR_DEPTH_666:
-		params.ucDstBpc = PANEL_6BIT_PER_COLOR;
-		break;
-	default:
-	case COLOR_DEPTH_888:
-		params.ucDstBpc = PANEL_8BIT_PER_COLOR;
-		break;
-	case COLOR_DEPTH_101010:
-		params.ucDstBpc = PANEL_10BIT_PER_COLOR;
-		break;
-	case COLOR_DEPTH_121212:
-		params.ucDstBpc = PANEL_12BIT_PER_COLOR;
-		break;
-	case COLOR_DEPTH_141414:
-		dm_error("14-bit color not supported by SelectCRTC_Source v3\n");
-		break;
-	case COLOR_DEPTH_161616:
-		params.ucDstBpc = PANEL_16BIT_PER_COLOR;
-		break;
-	}
+	params.ucDstBpc = dc_color_depth_to_atom(bp_params->color_depth);
 
 	if (EXEC_BIOS_CMD_TABLE(SelectCRTC_Source, params))
 		result = BP_RESULT_OK;