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| author | Sumit Gupta <sumitg@nvidia.com> | 2023-05-11 23:02:08 +0530 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2023-05-16 12:11:01 +0200 |
| commit | e852af72a7f21f4d25994365af86a92438d68014 (patch) | |
| tree | 7f4ec2c4a51772f511c8736c779f2439cef2632e /drivers/memory/tegra/mc.c | |
| parent | 80b19e09c8fb04a6397278b1c16403042629614f (diff) | |
| download | linux-e852af72a7f21f4d25994365af86a92438d68014.tar.gz linux-e852af72a7f21f4d25994365af86a92438d68014.tar.bz2 linux-e852af72a7f21f4d25994365af86a92438d68014.zip | |
memory: tegra: Make CPU cluster BW request a multiple of MC channels
Make CPU cluster's bandwidth (BW) request a multiple of MC channels.
CPU OPP tables have BW info per MC channel. But, the actual BW depends
on the number of MC channels which can change as per the boot config.
Get the number of MC channels which are actually enabled in current
boot configuration and multiply the BW request from a CPU cluster with
the number of enabled MC channels. This is not required to be done for
other MC clients.
Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/memory/tegra/mc.c')
| -rw-r--r-- | drivers/memory/tegra/mc.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c index 983455b1f98d..4a750da1c12a 100644 --- a/drivers/memory/tegra/mc.c +++ b/drivers/memory/tegra/mc.c @@ -843,6 +843,23 @@ remove_nodes: return err; } +static void tegra_mc_num_channel_enabled(struct tegra_mc *mc) +{ + unsigned int i; + u32 value; + + value = mc_ch_readl(mc, 0, MC_EMEM_ADR_CFG_CHANNEL_ENABLE); + if (value <= 0) { + mc->num_channels = mc->soc->num_channels; + return; + } + + for (i = 0; i < 32; i++) { + if (value & BIT(i)) + mc->num_channels++; + } +} + static int tegra_mc_probe(struct platform_device *pdev) { struct tegra_mc *mc; @@ -881,6 +898,8 @@ static int tegra_mc_probe(struct platform_device *pdev) return err; } + tegra_mc_num_channel_enabled(mc); + if (mc->soc->ops && mc->soc->ops->handle_irq) { mc->irq = platform_get_irq(pdev, 0); if (mc->irq < 0) |