forked from Minki/linux
3bfbed8d83
Vladimir Zapolskiy says: The present change is a bug fix for AVB link iteratively up/down. Steps to reproduce: - start AVB TX stream (Using aplay via MSE), - disconnect+reconnect the eth cable, - after a reconnection the eth connection goes iteratively up/down without user interaction, - this may heal after some seconds or even stay for minutes. As the documentation specifies, the "renesas,no-ether-link" option should be used when a board does not provide a proper AVB_LINK signal. There is no need for this option enabled on RCAR H3/M3 Salvator-X/XS and ULCB starter kits since the AVB_LINK is correctly handled by HW. Choosing to keep or remove the "renesas,no-ether-link" option will have impact on the code flow in the following ways: - keeping this option enabled may lead to unexpected behavior since the RX & TX are enabled/disabled directly from adjust_link function without any HW interrogation, - removing this option, the RX & TX will only be enabled/disabled after HW interrogation. The HW check is made through the LMON pin in PSR register which specifies AVB_LINK signal value (0 - at low level; 1 - at high level). In conclusion, the change is also a safety improvement because it removes the "renesas,no-ether-link" option leading to a proper way of detecting the link state based on HW interrogation and not on software heuristic. Note that DTS files for V3M Starter Kit, Draak and Eagle boards contain the same property, the files are untouched due to unavailable schematics to verify if the fix applies to these boards as well. -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEE4nzZofWswv9L/nKF189kaWo3T74FAlo83goACgkQ189kaWo3 T74cgw/+KEG74zpi6d3JYyrkXNCZQasPRVYWtKN8+6+ML31KfNNKGyIOqRHzc85D 5dMV0LkP4xJIiOpoDYwku6Mk7NUgvbywEUPAkScrAeUCTmNPI7uczI7SGepByoUI zml5u/bLnglrmKcxo8vyJWEQwCEP1cicwVYPBfmWvHZpmYqNQLGwNgrQdYH/Bo9E uD1x+ZcWeOYU9IVp8DQNAq0zJZ+n1T2dtu3nWoL5bUKcTHjF5IBIpLnfkK6TuTzB kn167OowM8ZvUlkvaFNcSD4HbFLh3huySPtl1hsIbxQ+MaajntIzRDzhCaQoQYCQ 9FLM5bWBbb9AM/DqhQ7C8cVwfUKND/jcBXEEDObjyEX9VniBgGpDs/rK1V5PxG+d ZZc1CCZxdx+qKDFYW95W4l9N2NQ1fSjHnlpMSiHI3z8rfeKLXMNo2Sx/506b6U3w Fa+wylCPjDBmD9dzDS22UlTfXgifSLfbhedi6TO9SglwHzJsMERPmouBnFW3oZAm GNUxMcqIxfeJtqOUwnl31sWqaH3UDV3PBYAKgZkv38qvp3KnK2cacwsMFh/p8KnZ Wu3PzQlUM8Y181u5xVekmtBNjVCoyMWRTOMQiNnQpJ5ASHLbQ1Fi135XhFK5j9sZ JgqVGHkO2r9ktfkIqnxp67ZHNnmwYZi6T5NIENP+Ba7FL0TrGLE= =kmQd -----END PGP SIGNATURE----- Merge tag 'renesas-fixes-for-v4.15' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/horms/renesas into fixes Pull "Renesas ARM Based SoC Fixes for v4.15" from Simon Horman: Vladimir Zapolskiy says: The present change is a bug fix for AVB link iteratively up/down. Steps to reproduce: - start AVB TX stream (Using aplay via MSE), - disconnect+reconnect the eth cable, - after a reconnection the eth connection goes iteratively up/down without user interaction, - this may heal after some seconds or even stay for minutes. As the documentation specifies, the "renesas,no-ether-link" option should be used when a board does not provide a proper AVB_LINK signal. There is no need for this option enabled on RCAR H3/M3 Salvator-X/XS and ULCB starter kits since the AVB_LINK is correctly handled by HW. Choosing to keep or remove the "renesas,no-ether-link" option will have impact on the code flow in the following ways: - keeping this option enabled may lead to unexpected behavior since the RX & TX are enabled/disabled directly from adjust_link function without any HW interrogation, - removing this option, the RX & TX will only be enabled/disabled after HW interrogation. The HW check is made through the LMON pin in PSR register which specifies AVB_LINK signal value (0 - at low level; 1 - at high level). In conclusion, the change is also a safety improvement because it removes the "renesas,no-ether-link" option leading to a proper way of detecting the link state based on HW interrogation and not on software heuristic. Note that DTS files for V3M Starter Kit, Draak and Eagle boards contain the same property, the files are untouched due to unavailable schematics to verify if the fix applies to these boards as well. * tag 'renesas-fixes-for-v4.15' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/horms/renesas: arm64: dts: renesas: ulcb: Remove renesas, no-ether-link property arm64: dts: renesas: salvator-x: Remove renesas, no-ether-link property |
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| dts | ||
| .gitignore | ||
| install.sh | ||
| Makefile | ||