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Commit d312fe2e authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Tomi Valkeinen
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drm/omap: DMM: In case of error/timeout in wait_status() print the reason 



If the wait_status() fails either because of an error reported in the
STATUS register or because of a timeout waiting for the wait_mask, print
information which might help diagnose the reason.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
parent b3d5a8d7

drivers/gpu/drm/omapdrm/omap_dmm_tiler.c

+10 −2
Original line number Diff line number Diff line
@@ -121,14 +121,22 @@ static int wait_status(struct refill_engine *engine, uint32_t wait_mask) 
	while (true) {

		r = dmm_read(dmm, reg[PAT_STATUS][engine->id]);

		err = r & DMM_PATSTATUS_ERR;

		if (err)

		if (err) {

			dev_err(dmm->dev,

				"%s: error (engine%d). PAT_STATUS: 0x%08x\n",

				__func__, engine->id, r);

			return -EFAULT;

		}



		if ((r & wait_mask) == wait_mask)

			break;



		if (--i == 0)

		if (--i == 0) {

			dev_err(dmm->dev,

				"%s: timeout (engine%d). PAT_STATUS: 0x%08x\n",

				__func__, engine->id, r);

			return -ETIMEDOUT;

		}



		udelay(1);

	}