drm/etnaviv: add clock gating workaround for GC7000 r6202

The LS1028A SoC errata sheet mentions A-050121 "GPU hangs if clock
gating for Rasterizer, Setup Engine and Texture Engine are enabled".
The workaround is to disable the corresponding clock gatings.

Signed-off-by: Michael Walle <[email protected]>
Signed-off-by: Lucas Stach <[email protected]>

Author: mwalle

drivers/gpu/drm/etnaviv/etnaviv_gpu.c

@@ -613,6 +613,12 @@ static void etnaviv_gpu_enable_mlcg(struct etnaviv_gpu *gpu)
 	    etnaviv_is_model_rev(gpu, GC2000, 0x5108))
 		pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_TX;
 
+	/* Disable SE, RA and TX clock gating on affected core revisions. */
+	if (etnaviv_is_model_rev(gpu, GC7000, 0x6202))
+		pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_SE |
+		       VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA |
+		       VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_TX;
+
 	pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_HZ;
 	pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_EZ;