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From:   Jonas Karlman <jonas@kwiboo.se>
Subject: [PATCH v3 6/6] phy/rockchip: inno-hdmi: Support more pre-pll
 configuration
Date:   Sat, 10 Oct 2020 15:32:20 +0000 (UTC)
Message-Id: <20201010153214.19722-7-jonas@kwiboo.se>
In-Reply-To: <20201010153214.19722-1-jonas@kwiboo.se>
References: <20200108210740.28769-1-jonas@kwiboo.se>
 <20201010153214.19722-1-jonas@kwiboo.se>
To:     Kishon Vijay Abraham I <kishon@ti.com>,
        Heiko Stuebner <heiko@sntech.de>
Cc:     Jonas Karlman <jonas@kwiboo.se>, Vinod Koul <vkoul@kernel.org>,
        Zheng Yang <zhengyang@rock-chips.com>,
        Algea Cao <algea.cao@rock-chips.com>,
        Huicong Xu <xhc@rock-chips.com>,
        linux-rockchip@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
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From: Algea Cao <algea.cao@rock-chips.com>

Adding the following freq cfg in 8-bit and 10-bit color depth:

{
  40000000,  65000000,  71000000,  83500000, 85750000,
  88750000, 108000000, 119000000, 162000000
}

New freq has been validated by quantumdata 980.

For some freq which can't be got by only using integer freq div,
frac freq div is needed, Such as 88.75Mhz 10-bit. But The actual
freq is different from the target freq, We must try to narrow
the gap between them. RK322X only support integer freq div.

The VCO of pre-PLL must be more than 2Ghz, otherwise PLL may be
unlocked.

Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Acked-by: Heiko Stuebner <heiko@sntech.de>
---
 drivers/phy/rockchip/phy-rockchip-inno-hdmi.c | 74 ++++++++++++-------
 1 file changed, 49 insertions(+), 25 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-inno-hdmi.c b/drivers/phy/rockchip/phy-rockchip-inno-hdmi.c
index 3719309ad0d0..bb8bdf5e3301 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-hdmi.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-hdmi.c
@@ -291,32 +291,56 @@ struct inno_hdmi_phy_drv_data {
 	const struct phy_config		*phy_cfg_table;
 };
 
+/*
+ * If only using integer freq div can't get frequency we want, frac
+ * freq div is needed. For example, pclk 88.75 Mhz and tmdsclk
+ * 110.9375 Mhz must use frac div 0xF00000. The actual frequency is different
+ * from the target frequency. Such as the tmds clock 110.9375 Mhz,
+ * the actual tmds clock we get is 110.93719 Mhz. It is important
+ * to note that RK322X platforms do not support frac div.
+ */
 static const struct pre_pll_config pre_pll_cfg_table[] = {
-	{ 27000000,  27000000, 1,  90, 3, 2, 2, 10, 3, 3, 4, 0, 0},
-	{ 27000000,  33750000, 1,  90, 1, 3, 3, 10, 3, 3, 4, 0, 0},
-	{ 40000000,  40000000, 1,  80, 2, 2, 2, 12, 2, 2, 2, 0, 0},
-	{ 59341000,  59341000, 1,  98, 3, 1, 2,  1, 3, 3, 4, 0, 0xE6AE6B},
-	{ 59400000,  59400000, 1,  99, 3, 1, 1,  1, 3, 3, 4, 0, 0},
-	{ 59341000,  74176250, 1,  98, 0, 3, 3,  1, 3, 3, 4, 0, 0xE6AE6B},
-	{ 59400000,  74250000, 1,  99, 1, 2, 2,  1, 3, 3, 4, 0, 0},
-	{ 74176000,  74176000, 1,  98, 1, 2, 2,  1, 2, 3, 4, 0, 0xE6AE6B},
-	{ 74250000,  74250000, 1,  99, 1, 2, 2,  1, 2, 3, 4, 0, 0},
-	{ 74176000,  92720000, 4, 494, 1, 2, 2,  1, 3, 3, 4, 0, 0x816817},
-	{ 74250000,  92812500, 4, 495, 1, 2, 2,  1, 3, 3, 4, 0, 0},
-	{148352000, 148352000, 1,  98, 1, 1, 1,  1, 2, 2, 2, 0, 0xE6AE6B},
-	{148500000, 148500000, 1,  99, 1, 1, 1,  1, 2, 2, 2, 0, 0},
-	{148352000, 185440000, 4, 494, 0, 2, 2,  1, 3, 2, 2, 0, 0x816817},
-	{148500000, 185625000, 4, 495, 0, 2, 2,  1, 3, 2, 2, 0, 0},
-	{296703000, 296703000, 1,  98, 0, 1, 1,  1, 0, 2, 2, 0, 0xE6AE6B},
-	{297000000, 297000000, 1,  99, 0, 1, 1,  1, 0, 2, 2, 0, 0},
-	{296703000, 370878750, 4, 494, 1, 2, 0,  1, 3, 1, 1, 0, 0x816817},
-	{297000000, 371250000, 4, 495, 1, 2, 0,  1, 3, 1, 1, 0, 0},
-	{593407000, 296703500, 1,  98, 0, 1, 1,  1, 0, 2, 1, 0, 0xE6AE6B},
-	{594000000, 297000000, 1,  99, 0, 1, 1,  1, 0, 2, 1, 0, 0},
-	{593407000, 370879375, 4, 494, 1, 2, 0,  1, 3, 1, 1, 1, 0x816817},
-	{594000000, 371250000, 4, 495, 1, 2, 0,  1, 3, 1, 1, 1, 0},
-	{593407000, 593407000, 1,  98, 0, 2, 0,  1, 0, 1, 1, 0, 0xE6AE6B},
-	{594000000, 594000000, 1,  99, 0, 2, 0,  1, 0, 1, 1, 0, 0},
+	{ 27000000,  27000000, 1,  90, 3, 2, 2, 10, 3, 3,  4, 0, 0},
+	{ 27000000,  33750000, 1,  90, 1, 3, 3, 10, 3, 3,  4, 0, 0},
+	{ 40000000,  40000000, 1,  80, 2, 2, 2, 12, 2, 2,  2, 0, 0},
+	{ 40000000,  50000000, 1, 100, 2, 2, 2,  1, 0, 0, 15, 0, 0},
+	{ 59341000,  59341000, 1,  98, 3, 1, 2,  1, 3, 3,  4, 0, 0xE6AE6B},
+	{ 59400000,  59400000, 1,  99, 3, 1, 1,  1, 3, 3,  4, 0, 0},
+	{ 59341000,  74176250, 1,  98, 0, 3, 3,  1, 3, 3,  4, 0, 0xE6AE6B},
+	{ 59400000,  74250000, 1,  99, 1, 2, 2,  1, 3, 3,  4, 0, 0},
+	{ 65000000,  65000000, 1, 130, 2, 2, 2,  1, 0, 0, 12, 0, 0},
+	{ 65000000,  81250000, 3, 325, 0, 3, 3,  1, 0, 0, 10, 0, 0},
+	{ 71000000,  71000000, 3, 284, 0, 3, 3,  1, 0, 0,  8, 0, 0},
+	{ 71000000,  88750000, 3, 355, 0, 3, 3,  1, 0, 0, 10, 0, 0},
+	{ 74176000,  74176000, 1,  98, 1, 2, 2,  1, 2, 3,  4, 0, 0xE6AE6B},
+	{ 74250000,  74250000, 1,  99, 1, 2, 2,  1, 2, 3,  4, 0, 0},
+	{ 74176000,  92720000, 4, 494, 1, 2, 2,  1, 3, 3,  4, 0, 0x816817},
+	{ 74250000,  92812500, 4, 495, 1, 2, 2,  1, 3, 3,  4, 0, 0},
+	{ 83500000,  83500000, 2, 167, 2, 1, 1,  1, 0, 0,  6, 0, 0},
+	{ 83500000, 104375000, 1, 104, 2, 1, 1,  1, 1, 0,  5, 0, 0x600000},
+	{ 85750000,  85750000, 3, 343, 0, 3, 3,  1, 0, 0,  8, 0, 0},
+	{ 88750000,  88750000, 3, 355, 0, 3, 3,  1, 0, 0,  8, 0, 0},
+	{ 88750000, 110937500, 1, 110, 2, 1, 1,  1, 1, 0,  5, 0, 0xF00000},
+	{108000000, 108000000, 1,  90, 3, 0, 0,  1, 0, 0,  5, 0, 0},
+	{108000000, 135000000, 1,  90, 0, 2, 2,  1, 0, 0,  5, 0, 0},
+	{119000000, 119000000, 1, 119, 2, 1, 1,  1, 0, 0,  6, 0, 0},
+	{119000000, 148750000, 1,  99, 0, 2, 2,  1, 0, 0,  5, 0, 0x2AAAAA},
+	{148352000, 148352000, 1,  98, 1, 1, 1,  1, 2, 2,  2, 0, 0xE6AE6B},
+	{148500000, 148500000, 1,  99, 1, 1, 1,  1, 2, 2,  2, 0, 0},
+	{148352000, 185440000, 4, 494, 0, 2, 2,  1, 3, 2,  2, 0, 0x816817},
+	{148500000, 185625000, 4, 495, 0, 2, 2,  1, 3, 2,  2, 0, 0},
+	{162000000, 162000000, 1, 108, 0, 2, 2,  1, 0, 0,  4, 0, 0},
+	{162000000, 202500000, 1, 135, 0, 2, 2,  1, 0, 0,  5, 0, 0},
+	{296703000, 296703000, 1,  98, 0, 1, 1,  1, 0, 2,  2, 0, 0xE6AE6B},
+	{297000000, 297000000, 1,  99, 0, 1, 1,  1, 0, 2,  2, 0, 0},
+	{296703000, 370878750, 4, 494, 1, 2, 0,  1, 3, 1,  1, 0, 0x816817},
+	{297000000, 371250000, 4, 495, 1, 2, 0,  1, 3, 1,  1, 0, 0},
+	{593407000, 296703500, 1,  98, 0, 1, 1,  1, 0, 2,  1, 0, 0xE6AE6B},
+	{594000000, 297000000, 1,  99, 0, 1, 1,  1, 0, 2,  1, 0, 0},
+	{593407000, 370879375, 4, 494, 1, 2, 0,  1, 3, 1,  1, 1, 0x816817},
+	{594000000, 371250000, 4, 495, 1, 2, 0,  1, 3, 1,  1, 1, 0},
+	{593407000, 593407000, 1,  98, 0, 2, 0,  1, 0, 1,  1, 0, 0xE6AE6B},
+	{594000000, 594000000, 1,  99, 0, 2, 0,  1, 0, 1,  1, 0, 0},
 	{ /* sentinel */ }
 };
 
-- 
2.17.1