Re: [PATCH 0/2] Extending PLL LUT for i.MX8MP Samsung HDMI PHY

From: Dominique Martinet
Date: Wed Sep 11 2024 - 02:08:38 EST

Dominique Martinet wrote on Wed, Sep 11, 2024 at 09:23:31AM +0900:
> so if I find some time I'll whip some loop to check all other values...

There were more differences than I thought there'd be (see diff below)

they're all minor enough to probably not care, but your script finds
exact values for them so it might be worth updating the regs if we keep
the table...
(OTOH these seem to work, and "if it works don't touch it" -- I have no
further opinion now I've checked, curiosity is sated)

Might want to just check 154000000 though, reg6's 0x80 was not set so
SDC was disabled? and it'd get the integer fraction (153600000) instead
if I understand this correctly

---------
diff --git a/drivers/phy/freescale/phy-fsl-samsung-hdmi.c b/drivers/phy/freescale/phy-fsl-samsung-hdmi.c
index a5ad51425ee3..72facc7bd045 100644
--- a/drivers/phy/freescale/phy-fsl-samsung-hdmi.c
+++ b/drivers/phy/freescale/phy-fsl-samsung-hdmi.c
@@ -73,7 +73,7 @@ static const struct phy_config phy_pll_cfg[] = {
.pixclk = 24024000,
.pll_div_regs = { 0xd1, 0x50, 0xf1, 0x99, 0x02, 0x80, 0x40 },
}, {
- .pixclk = 25175000,
+ .pixclk = 25177981,
.pll_div_regs = { 0xd1, 0x54, 0xfc, 0xcc, 0x91, 0x80, 0x40 },
}, {
.pixclk = 26750000,
@@ -82,16 +82,16 @@ static const struct phy_config phy_pll_cfg[] = {
.pixclk = 27027000,
.pll_div_regs = { 0xd1, 0x5a, 0xf2, 0xfd, 0x0c, 0x80, 0x40 },
}, {
- .pixclk = 29500000,
+ .pixclk = 29487500,
.pll_div_regs = { 0xd1, 0x62, 0xf4, 0x95, 0x08, 0x80, 0x40 },
}, {
- .pixclk = 30750000,
+ .pixclk = 30729661,
.pll_div_regs = { 0xd1, 0x66, 0xf4, 0x82, 0x01, 0x88, 0x45 },
}, {
- .pixclk = 30888000,
+ .pixclk = 30848949,
.pll_div_regs = { 0xd1, 0x66, 0xf4, 0x99, 0x18, 0x88, 0x45 },
}, {
- .pixclk = 33750000,
+ .pixclk = 33731250,
.pll_div_regs = { 0xd1, 0x70, 0xf4, 0x82, 0x01, 0x80, 0x40 },
}, {
.pixclk = 35000000,
@@ -106,13 +106,13 @@ static const struct phy_config phy_pll_cfg[] = {
.pixclk = 44500000,
.pll_div_regs = { 0xd1, 0x5c, 0x92, 0x98, 0x11, 0x84, 0x41 },
}, {
- .pixclk = 47000000,
+ .pixclk = 47005000,
.pll_div_regs = { 0xd1, 0x62, 0x94, 0x95, 0x82, 0x80, 0x40 },
}, {
- .pixclk = 47500000,
+ .pixclk = 47502000,
.pll_div_regs = { 0xd1, 0x63, 0x96, 0xa1, 0x82, 0x80, 0x40 },
}, {
- .pixclk = 50349650,
+ .pixclk = 50355924,
.pll_div_regs = { 0xd1, 0x54, 0x7c, 0xc3, 0x8f, 0x80, 0x40 },
}, {
.pixclk = 53250000,
@@ -124,16 +124,16 @@ static const struct phy_config phy_pll_cfg[] = {
.pixclk = 54054000,
.pll_div_regs = { 0xd1, 0x5a, 0x72, 0xfd, 0x0c, 0x80, 0x40 },
}, {
- .pixclk = 59000000,
+ .pixclk = 58975000,
.pll_div_regs = { 0xd1, 0x62, 0x74, 0x95, 0x08, 0x80, 0x40 },
}, {
- .pixclk = 59340659,
+ .pixclk = 59264777,
.pll_div_regs = { 0xd1, 0x62, 0x74, 0xdb, 0x52, 0x88, 0x47 },
}, {
- .pixclk = 61500000,
+ .pixclk = 61459322,
.pll_div_regs = { 0xd1, 0x66, 0x74, 0x82, 0x01, 0x88, 0x45 },
}, {
- .pixclk = 63500000,
+ .pixclk = 63437500,
.pll_div_regs = { 0xd1, 0x69, 0x74, 0x89, 0x08, 0x80, 0x40 },
}, {
.pixclk = 67500000,
@@ -145,25 +145,25 @@ static const struct phy_config phy_pll_cfg[] = {
.pixclk = 72072000,
.pll_div_regs = { 0xd1, 0x5a, 0x52, 0xfd, 0x0c, 0x80, 0x40 },
}, {
- .pixclk = 74176000,
+ .pixclk = 74175824,
.pll_div_regs = { 0xd1, 0x5d, 0x58, 0xdb, 0xA2, 0x88, 0x41 },
}, {
.pixclk = 74250000,
.pll_div_regs = { 0xd1, 0x5c, 0x52, 0x90, 0x0d, 0x84, 0x41 },
}, {
- .pixclk = 78500000,
+ .pixclk = 78487500,
.pll_div_regs = { 0xd1, 0x62, 0x54, 0x87, 0x01, 0x80, 0x40 },
}, {
- .pixclk = 82000000,
+ .pixclk = 81945763,
.pll_div_regs = { 0xd1, 0x66, 0x54, 0x82, 0x01, 0x88, 0x45 },
}, {
- .pixclk = 82500000,
+ .pixclk = 82486555,
.pll_div_regs = { 0xd1, 0x67, 0x54, 0x88, 0x01, 0x90, 0x49 },
}, {
- .pixclk = 89000000,
+ .pixclk = 89075000,
.pll_div_regs = { 0xd1, 0x70, 0x54, 0x84, 0x83, 0x80, 0x40 },
}, {
- .pixclk = 90000000,
+ .pixclk = 89950000,
.pll_div_regs = { 0xd1, 0x70, 0x54, 0x82, 0x01, 0x80, 0x40 },
}, {
.pixclk = 94000000,
@@ -178,7 +178,7 @@ static const struct phy_config phy_pll_cfg[] = {
.pixclk = 99000000,
.pll_div_regs = { 0xd1, 0x52, 0x32, 0x82, 0x01, 0x88, 0x47 },
}, {
- .pixclk = 100699300,
+ .pixclk = 100711847,
.pll_div_regs = { 0xd1, 0x54, 0x3c, 0xc3, 0x8f, 0x80, 0x40 },
}, {
.pixclk = 102500000,
@@ -196,16 +196,16 @@ static const struct phy_config phy_pll_cfg[] = {
.pixclk = 108108000,
.pll_div_regs = { 0xd1, 0x5a, 0x32, 0xfd, 0x0c, 0x80, 0x40 },
}, {
- .pixclk = 118000000,
+ .pixclk = 117950000,
.pll_div_regs = { 0xd1, 0x62, 0x34, 0x95, 0x08, 0x80, 0x40 },
}, {
- .pixclk = 123000000,
+ .pixclk = 122918644,
.pll_div_regs = { 0xd1, 0x66, 0x34, 0x82, 0x01, 0x88, 0x45 },
}, {
- .pixclk = 127000000,
+ .pixclk = 126875000,
.pll_div_regs = { 0xd1, 0x69, 0x34, 0x89, 0x08, 0x80, 0x40 },
}, {
- .pixclk = 135000000,
+ .pixclk = 134925000,
.pll_div_regs = { 0xd1, 0x70, 0x34, 0x82, 0x01, 0x80, 0x40 },
}, {
.pixclk = 135580000,
@@ -214,20 +214,20 @@ static const struct phy_config phy_pll_cfg[] = {
.pixclk = 137520000,
.pll_div_regs = { 0xd1, 0x72, 0x38, 0x99, 0x10, 0x85, 0x41 },
}, {
- .pixclk = 138750000,
+ .pixclk = 138658397,
.pll_div_regs = { 0xd1, 0x73, 0x35, 0x88, 0x05, 0x90, 0x4d },
}, {
- .pixclk = 140000000,
+ .pixclk = 140040000,
.pll_div_regs = { 0xd1, 0x75, 0x36, 0xa7, 0x90, 0x80, 0x40 },
}, {
- .pixclk = 148352000,
+ .pixclk = 148265128,
.pll_div_regs = { 0xd1, 0x7b, 0x35, 0xdb, 0x39, 0x90, 0x45 },
}, {
- .pixclk = 148500000,
+ .pixclk = 148396403,
.pll_div_regs = { 0xd1, 0x7b, 0x35, 0x84, 0x03, 0x90, 0x45 },
}, {
.pixclk = 154000000,
- .pll_div_regs = { 0xd1, 0x40, 0x18, 0x83, 0x01, 0x00, 0x40 },
+ .pll_div_regs = { 0xd1, 0x40, 0x18, 0x83, 0x01, 0x80, 0x40 },
}, {
.pixclk = 157000000,
.pll_div_regs = { 0xd1, 0x41, 0x11, 0xa7, 0x14, 0x80, 0x40 },
@@ -268,10 +268,10 @@ static const struct phy_config phy_pll_cfg[] = {
.pixclk = 254000000,
.pll_div_regs = { 0xd1, 0x69, 0x14, 0x89, 0x08, 0x80, 0x40 },
}, {
- .pixclk = 277500000,
+ .pixclk = 277316794,
.pll_div_regs = { 0xd1, 0x73, 0x15, 0x88, 0x05, 0x90, 0x4d },
}, {
- .pixclk = 297000000,
+ .pixclk = 296792806,
.pll_div_regs = { 0xd1, 0x7b, 0x15, 0x84, 0x03, 0x90, 0x45 },
},
};
-------------
--
Dominique