On Thu, Apr 11, 2019 at 10:33:38PM +0530, Manikanta Maddireddy wrote:
> Recommended update FC threshold in Tegra210 is 0x60 for best performance
> of x1 link. Setting this to 0x60 provides the best balance between number
> of UpdateFC and read data sent over the link.
>
> Signed-off-by: Manikanta Maddireddy <mmaddireddy@xxxxxxxxxx>
> ---
> drivers/pci/controller/pci-tegra.c | 15 +++++++++++++++
> 1 file changed, 15 insertions(+)
Looks to me like part of this patch ended up in 12/30?
Thierry
> diff --git a/drivers/pci/controller/pci-tegra.c b/drivers/pci/controller/pci-tegra.c
> index b74408eeb367..7dc728cc5f51 100644
> --- a/drivers/pci/controller/pci-tegra.c
> +++ b/drivers/pci/controller/pci-tegra.c
> @@ -319,6 +319,7 @@ struct tegra_pcie_soc {
> bool update_clamp_threshold;
> bool program_deskew_time;
> bool raw_violation_fixup;
> + bool update_fc_threshold;
> struct {
> struct {
> u32 rp_ectl_2_r1;
> @@ -662,6 +663,13 @@ static void tegra_pcie_apply_sw_fixup(struct tegra_pcie_port *port)
> value |= soc->update_fc_val;
> writel(value, port->base + RP_VEND_XP);
> }
> +
> + if (soc->update_fc_threshold) {
> + value = readl(port->base + RP_VEND_XP);
> + value &= ~RP_VEND_XP_UPDATE_FC_THRESHOLD_MASK;
> + value |= soc->update_fc_val;
> + writel(value, port->base + RP_VEND_XP);
> + }
> }
>
> static void tegra_pcie_port_enable(struct tegra_pcie_port *port)
> @@ -2409,6 +2417,7 @@ static const struct tegra_pcie_soc tegra20_pcie = {
> .update_clamp_threshold = false,
> .program_deskew_time = false,
> .raw_violation_fixup = false,
> + .update_fc_threshold = false,
> .ectl.enable = false,
> };
>
> @@ -2436,6 +2445,7 @@ static const struct tegra_pcie_soc tegra30_pcie = {
> .update_clamp_threshold = false,
> .program_deskew_time = false,
> .raw_violation_fixup = false,
> + .update_fc_threshold = false,
> .ectl.enable = false,
> };
>
> @@ -2458,6 +2468,7 @@ static const struct tegra_pcie_soc tegra124_pcie = {
> .update_clamp_threshold = true,
> .program_deskew_time = false,
> .raw_violation_fixup = true,
> + .update_fc_threshold = false,
> .ectl.enable = false,
> };
>
> @@ -2468,6 +2479,8 @@ static const struct tegra_pcie_soc tegra210_pcie = {
> .pads_pll_ctl = PADS_PLL_CTL_TEGRA30,
> .tx_ref_sel = PADS_PLL_CTL_TXCLKREF_BUF_EN,
> .pads_refclk_cfg0 = 0x90b890b8,
> + /* FC threshold is bit[25:18] */
> + .update_fc_val = 0x01800000,
> .has_pex_clkreq_en = true,
> .has_pex_bias_ctrl = true,
> .has_intr_prsnt_sense = true,
> @@ -2478,6 +2491,7 @@ static const struct tegra_pcie_soc tegra210_pcie = {
> .update_clamp_threshold = true,
> .program_deskew_time = true,
> .raw_violation_fixup = false,
> + .update_fc_threshold = true,
> .ectl.regs.rp_ectl_2_r1 = 0x0000000f,
> .ectl.regs.rp_ectl_4_r1 = 0x00000067,
> .ectl.regs.rp_ectl_5_r1 = 0x55010000,
> @@ -2513,6 +2527,7 @@ static const struct tegra_pcie_soc tegra186_pcie = {
> .update_clamp_threshold = false,
> .program_deskew_time = false,
> .raw_violation_fixup = false,
> + .update_fc_threshold = false,
> .ectl.enable = false,
> };
>
> --
> 2.17.1
>
Attachment:
signature.asc
Description: PGP signature
