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| author | Erico Nunes <nunes.erico@gmail.com> | 2024-01-24 05:59:42 +0300 |
|---|---|---|
| committer | Qiang Yu <yuq825@gmail.com> | 2024-02-12 11:26:57 +0300 |
| commit | a9da58c86e3bfb0a068a1834e48bdc536e7201e4 (patch) | |
| tree | 10fc1c4025c8bb1c24764f64047588475396821a /drivers/gpu/drm/lima | |
| parent | 2ccd4adc681e34cc12313b078e5067fa2383c2eb (diff) | |
| download | linux-a9da58c86e3bfb0a068a1834e48bdc536e7201e4.tar.xz | |
drm/lima: set pp bus_stop bit before hard reset
This is required for reliable hard resets. Otherwise, doing a hard reset
while a task is still running (such as a task which is being stopped by
the drm_sched timeout handler) may result in random mmu write timeouts
or lockups which cause the entire gpu to hang.
Signed-off-by: Erico Nunes <nunes.erico@gmail.com>
Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240124025947.2110659-4-nunes.erico@gmail.com
Diffstat (limited to 'drivers/gpu/drm/lima')
| -rw-r--r-- | drivers/gpu/drm/lima/lima_pp.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/lima/lima_pp.c b/drivers/gpu/drm/lima/lima_pp.c index a8f8f63b8295..ac097dd75072 100644 --- a/drivers/gpu/drm/lima/lima_pp.c +++ b/drivers/gpu/drm/lima/lima_pp.c @@ -168,6 +168,11 @@ static void lima_pp_write_frame(struct lima_ip *ip, u32 *frame, u32 *wb) } } +static int lima_pp_bus_stop_poll(struct lima_ip *ip) +{ + return !!(pp_read(LIMA_PP_STATUS) & LIMA_PP_STATUS_BUS_STOPPED); +} + static int lima_pp_hard_reset_poll(struct lima_ip *ip) { pp_write(LIMA_PP_PERF_CNT_0_LIMIT, 0xC01A0000); @@ -181,6 +186,14 @@ static int lima_pp_hard_reset(struct lima_ip *ip) pp_write(LIMA_PP_PERF_CNT_0_LIMIT, 0xC0FFE000); pp_write(LIMA_PP_INT_MASK, 0); + + pp_write(LIMA_PP_CTRL, LIMA_PP_CTRL_STOP_BUS); + ret = lima_poll_timeout(ip, lima_pp_bus_stop_poll, 10, 100); + if (ret) { + dev_err(dev->dev, "pp %s bus stop timeout\n", lima_ip_name(ip)); + return ret; + } + pp_write(LIMA_PP_CTRL, LIMA_PP_CTRL_FORCE_RESET); ret = lima_poll_timeout(ip, lima_pp_hard_reset_poll, 10, 100); if (ret) { |