Re: [RFC PATCH v5 6/9] media: tegra: Add Tegra210 Video input driver

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On 3/24/20 6:08 PM, Sowjanya Komatineni wrote:

On 3/24/20 5:34 PM, Dmitry Osipenko wrote:
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23.03.2020 20:52, Sowjanya Komatineni пишет:
+static void tegra_channel_vi_soft_reset(struct tegra_vi_channel *chan)
+{
+     /* disable clock gating to enable continuous clock */
+     tegra_vi_write(chan, TEGRA_VI_CFG_CG_CTRL, 0);
+     /*
+      * Soft reset memory client interface, pixel format logic, sensor
+      * control logic, and a shadow copy logic to bring VI to clean state.
+      */
+     vi_csi_write(chan, TEGRA_VI_CSI_SW_RESET, 0xf);
+     usleep_range(100, 200);
+     vi_csi_write(chan, TEGRA_VI_CSI_SW_RESET, 0x0);
Is it safe to reset MCCIF without blocking and flushing memory requests
at first?
Yes to bring VI to clean state on errors its recommended by HW design team.
BTW, just to be clear this is Software reset.




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