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

diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index dffbae005a962eedbd46f94a876674bbcf4aa0e4..a050a65af8f29fd2fbb00cdf5b4548e499663cc2 100644 (file)
--- 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 },
        }
 };