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Commit 64146f8b authored by Alex Deucher's avatar Alex Deucher Committed by Dave Airlie
Browse files

drm/radeon/kms: prefer legacy pll algo for tv-out 

ntsc seems to work fine with either algo, some
pal TVs seem pickier.

Fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=30832



Signed-off-by: default avatarAlex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent fb3b06c8

drivers/gpu/drm/radeon/atombios_crtc.c

+5 −1
Original line number Diff line number Diff line
@@ -957,7 +957,11 @@ static void atombios_crtc_set_pll(struct drm_crtc *crtc, struct drm_display_mode 
	/* adjust pixel clock as needed */

	adjusted_clock = atombios_adjust_pll(crtc, mode, pll, ss_enabled, &ss);



	if (ASIC_IS_AVIVO(rdev))

	if (radeon_encoder->active_device & (ATOM_DEVICE_TV_SUPPORT))

		/* TV seems to prefer the legacy algo on some boards */

		radeon_compute_pll_legacy(pll, adjusted_clock, &pll_clock, &fb_div, &frac_fb_div,

					  &ref_div, &post_div);

	else if (ASIC_IS_AVIVO(rdev))

		radeon_compute_pll_avivo(pll, adjusted_clock, &pll_clock, &fb_div, &frac_fb_div,

					 &ref_div, &post_div);

	else