diff mbox series

[RFC,4/6] mmc: tmio: enforce retune after runtime suspend

Message ID 20200129203709.30493-5-wsa+renesas@sang-engineering.com
State New
Headers show
Series None | expand

Commit Message

Wolfram Sang Jan. 29, 2020, 8:37 p.m. UTC
Currently, select_tuning() is called after RPM resume. But
select_tuning() needs some additional function calls to work correctly.
Instead of reimplementing the whole postprocessing, just enforce
retuning.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---

I couldn't trigger RPM suspend even with debug code. Shimoda-san said
it should only occur with removed cards which is not so easy with
soldered eMMC. For those cases, I think the aproach taken here is fine.
Needs more discussion, though, to make sure...

 drivers/mmc/host/renesas_sdhi_core.c | 1 -
 drivers/mmc/host/tmio_mmc.h          | 1 -
 drivers/mmc/host/tmio_mmc_core.c     | 8 +-------
 3 files changed, 1 insertion(+), 9 deletions(-)
diff mbox series

Patch

diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
index 24ee8ac1fe21..0c9e5e010bda 100644
--- a/drivers/mmc/host/renesas_sdhi_core.c
+++ b/drivers/mmc/host/renesas_sdhi_core.c
@@ -898,7 +898,6 @@  int renesas_sdhi_probe(struct platform_device *pdev,
 			dev_warn(&host->pdev->dev, "Unknown clock rate for tuning\n");
 
 		host->execute_tuning = renesas_sdhi_execute_tuning;
-		host->select_tuning = renesas_sdhi_select_tuning;
 		host->check_retune = renesas_sdhi_check_scc_error;
 		host->prepare_hs400_tuning =
 			renesas_sdhi_prepare_hs400_tuning;
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index bdb9973981ff..b6fffd3d2650 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -183,7 +183,6 @@  struct tmio_mmc_host {
 	 * and mandatory for SDR104.
 	 */
 	int (*execute_tuning)(struct tmio_mmc_host *host, u32 opcode);
-	int (*select_tuning)(struct tmio_mmc_host *host);
 
 	/* Tuning values: 1 for success, 0 for failure */
 	DECLARE_BITMAP(taps, BITS_PER_BYTE * sizeof(long));
diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c
index 3cacb516a66e..aeafa1c68ce2 100644
--- a/drivers/mmc/host/tmio_mmc_core.c
+++ b/drivers/mmc/host/tmio_mmc_core.c
@@ -1302,11 +1302,6 @@  int tmio_mmc_host_runtime_suspend(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(tmio_mmc_host_runtime_suspend);
 
-static bool tmio_mmc_can_retune(struct tmio_mmc_host *host)
-{
-	return host->tap_num && mmc_can_retune(host->mmc);
-}
-
 int tmio_mmc_host_runtime_resume(struct device *dev)
 {
 	struct tmio_mmc_host *host = dev_get_drvdata(dev);
@@ -1323,8 +1318,7 @@  int tmio_mmc_host_runtime_resume(struct device *dev)
 
 	tmio_mmc_enable_dma(host, true);
 
-	if (tmio_mmc_can_retune(host) && host->select_tuning(host))
-		dev_warn(&host->pdev->dev, "Tuning selection failed\n");
+	mmc_retune_needed(host->mmc);
 
 	return 0;
 }