diff options
| author | Douglas Anderson <dianders@chromium.org> | 2024-09-08 14:55:01 +0000 |
|---|---|---|
| committer | Heiko Stuebner <heiko@sntech.de> | 2024-09-19 16:22:47 +0200 |
| commit | 7d324630f3515bd6e11cadeb1d748bd74ecc9664 (patch) | |
| tree | 352c4c2f531bf553442506f3bc1acf05e66a04f7 /drivers/gpu/drm/rockchip | |
| parent | b60c86d305f46483d3ed0743e9ec97a76addcabc (diff) | |
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: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Yakir Yang <ykk@rock-chips.com>
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240908145511.3331451-5-jonas@kwiboo.se
Diffstat (limited to 'drivers/gpu/drm/rockchip')
| -rw-r--r-- | drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 16 |
1 files changed, 1 insertions, 15 deletions
diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c index dffbae005a96..a050a65af8f2 100644 --- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c +++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c @@ -179,23 +179,9 @@ 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}, + ~0UL, { 0x0000, 0x0000, 0x0000 }, } }; |