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Commit 6d53200b authored by addy ke's avatar addy ke Committed by Ulf Hansson
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mmc: dw_mmc: rockchip: add support MMC_CAP_RUNTIME_RESUME capability 



To support HS200 and UHS mode, mmc core will call init_card() to
execute tuning:
- sdio: init_card can be executed at runtime resume.
- sd and mmc: init_card can be executed at resume or runtime resume,
  which depends on MMC_CAP_RUNTIME_RESUME capability.

On rk3288 SoC, host will get DRTO interrupt when host send command
to read tuning data. This will spend more than 111ms:
drto_ms = drto_clks * 1000 / bus_hz = 111ms.

And the total tuning time will be more than 400ms.

So we should add MMC_CAP_RUNTIME_RESUME capability to execute tuning
at runtime resume. Only if we do so, can we pass resume test.

Reviewed-by: default avatarDoug Anderson <dianders@chromium.org>
Signed-off-by: default avatarAddy Ke <addy.ke@rock-chips.com>
Signed-off-by: default avatarJaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 80113132

drivers/mmc/host/dw_mmc-rockchip.c

+8 −0
Original line number Original line Diff line number Diff line
@@ -76,12 +76,20 @@ static int dw_mci_rockchip_init(struct dw_mci *host) 
	return 0;

	return 0;

}

}





/* Common capabilities of RK3288 SoC */

static unsigned long dw_mci_rk3288_dwmmc_caps[4] = {

	MMC_CAP_RUNTIME_RESUME, /* emmc */

	MMC_CAP_RUNTIME_RESUME, /* sdmmc */

	MMC_CAP_RUNTIME_RESUME, /* sdio0 */

	MMC_CAP_RUNTIME_RESUME, /* sdio1 */

};

static const struct dw_mci_drv_data rk2928_drv_data = {

static const struct dw_mci_drv_data rk2928_drv_data = {

	.prepare_command        = dw_mci_rockchip_prepare_command,

	.prepare_command        = dw_mci_rockchip_prepare_command,

	.init			= dw_mci_rockchip_init,

	.init			= dw_mci_rockchip_init,

};

};





static const struct dw_mci_drv_data rk3288_drv_data = {

static const struct dw_mci_drv_data rk3288_drv_data = {

	.caps			= dw_mci_rk3288_dwmmc_caps,

	.prepare_command        = dw_mci_rockchip_prepare_command,

	.prepare_command        = dw_mci_rockchip_prepare_command,

	.set_ios		= dw_mci_rk3288_set_ios,

	.set_ios		= dw_mci_rk3288_set_ios,

	.setup_clock    = dw_mci_rk3288_setup_clock,

	.setup_clock    = dw_mci_rk3288_setup_clock,