drm/radeon: only apply hdmi bpc pll flags when encoder mode is hdmi

May fix display issues with non-HDMI displays.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

(cherry picked from commit 7d5ab300)
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

drivers/gpu/drm/radeon/atombios_crtc.c

@@ -839,6 +839,7 @@ static void atombios_crtc_program_pll(struct drm_crtc *crtc,
 			args.v5.ucMiscInfo = 0; /* HDMI depth, etc. */
 			if (ss_enabled && (ss->type & ATOM_EXTERNAL_SS_MASK))
 				args.v5.ucMiscInfo |= PIXEL_CLOCK_V5_MISC_REF_DIV_SRC;
+			if (encoder_mode == ATOM_ENCODER_MODE_HDMI) {
 				switch (bpc) {
 				case 8:
 				default:
@@ -848,6 +849,7 @@ static void atombios_crtc_program_pll(struct drm_crtc *crtc,
 					args.v5.ucMiscInfo |= PIXEL_CLOCK_V5_MISC_HDMI_30BPP;
 					break;
 				}
+			}
 			args.v5.ucTransmitterID = encoder_id;
 			args.v5.ucEncoderMode = encoder_mode;
 			args.v5.ucPpll = pll_id;
@@ -861,6 +863,7 @@ static void atombios_crtc_program_pll(struct drm_crtc *crtc,
 			args.v6.ucMiscInfo = 0; /* HDMI depth, etc. */
 			if (ss_enabled && (ss->type & ATOM_EXTERNAL_SS_MASK))
 				args.v6.ucMiscInfo |= PIXEL_CLOCK_V6_MISC_REF_DIV_SRC;
+			if (encoder_mode == ATOM_ENCODER_MODE_HDMI) {
 				switch (bpc) {
 				case 8:
 				default:
@@ -876,6 +879,7 @@ static void atombios_crtc_program_pll(struct drm_crtc *crtc,
 					args.v6.ucMiscInfo |= PIXEL_CLOCK_V6_MISC_HDMI_48BPP;
 					break;
 				}
+			}
 			args.v6.ucTransmitterID = encoder_id;
 			args.v6.ucEncoderMode = encoder_mode;
 			args.v6.ucPpll = pll_id;