Commit 7d324630 authored by Douglas Anderson's avatar Douglas Anderson Committed by Heiko Stuebner
Browse files

drm/rockchip: dw_hdmi: Set cur_ctr to 0 always 



Jitter was improved by lowering the MPLL bandwidth to account for high
frequency noise in the rk3288 PLL.  In each case MPLL bandwidth was
lowered only enough to get us a comfortable margin.  We believe that
lowering the bandwidth like this is safe given sufficient testing.

Signed-off-by: default avatarDouglas Anderson <dianders@chromium.org>
Signed-off-by: default avatarYakir Yang <ykk@rock-chips.com>
Signed-off-by: default avatarJonas Karlman <jonas@kwiboo.se>
Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240908145511.3331451-5-jonas@kwiboo.se
parent b60c86d3

drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c

+1 −15
Original line number Diff line number Diff line
@@ -179,20 +179,6 @@ static const struct dw_hdmi_mpll_config rockchip_mpll_cfg[] = { 
static const struct dw_hdmi_curr_ctrl rockchip_cur_ctr[] = {

	/*      pixelclk    bpp8    bpp10   bpp12 */

	{

		40000000,  { 0x0018, 0x0018, 0x0018 },

	}, {

		65000000,  { 0x0028, 0x0028, 0x0028 },

	}, {

		66000000,  { 0x0038, 0x0038, 0x0038 },

	}, {

		74250000,  { 0x0028, 0x0038, 0x0038 },

	}, {

		83500000,  { 0x0028, 0x0038, 0x0038 },

	}, {

		146250000, { 0x0038, 0x0038, 0x0038 },

	}, {

		148500000, { 0x0000, 0x0038, 0x0038 },

	}, {

		600000000, { 0x0000, 0x0000, 0x0000 },

	}, {

		~0UL,      { 0x0000, 0x0000, 0x0000 },