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Commit 6a296e20 authored by Shirish S's avatar Shirish S Committed by Inki Dae
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drm/exynos: add hdmiphy power on/off sequence 



This patch implements the power on/off sequence
of HDMI PHY in exynos5420 and exynos5250 as provided
by the hardware team.

This has been verified for mulitple iterations of
S2R.

Signed-off-by: default avatarShirish S <s.shirish@samsung.com>
Signed-off-by: default avatarRahul Sharma <Rahul.Sharma@samsung.com>
Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
parent 85a64f7c

drivers/gpu/drm/exynos/exynos_hdmi.c

+34 −6
Original line number Diff line number Diff line
@@ -1683,16 +1683,44 @@ static void hdmiphy_conf_reset(struct hdmi_context *hdata) 


static void hdmiphy_poweron(struct hdmi_context *hdata)

{

	if (hdata->type == HDMI_TYPE14)

		hdmi_reg_writemask(hdata, HDMI_PHY_CON_0, 0,

			HDMI_PHY_POWER_OFF_EN);

	if (hdata->type != HDMI_TYPE14)

		return;



	DRM_DEBUG_KMS("\n");



	/* For PHY Mode Setting */

	hdmiphy_reg_writeb(hdata, HDMIPHY_MODE_SET_DONE,

				HDMI_PHY_ENABLE_MODE_SET);

	/* Phy Power On */

	hdmiphy_reg_writeb(hdata, HDMIPHY_POWER,

				HDMI_PHY_POWER_ON);

	/* For PHY Mode Setting */

	hdmiphy_reg_writeb(hdata, HDMIPHY_MODE_SET_DONE,

				HDMI_PHY_DISABLE_MODE_SET);

	/* PHY SW Reset */

	hdmiphy_conf_reset(hdata);

}



static void hdmiphy_poweroff(struct hdmi_context *hdata)

{

	if (hdata->type == HDMI_TYPE14)

		hdmi_reg_writemask(hdata, HDMI_PHY_CON_0, ~0,

			HDMI_PHY_POWER_OFF_EN);

	if (hdata->type != HDMI_TYPE14)

		return;



	DRM_DEBUG_KMS("\n");



	/* PHY SW Reset */

	hdmiphy_conf_reset(hdata);

	/* For PHY Mode Setting */

	hdmiphy_reg_writeb(hdata, HDMIPHY_MODE_SET_DONE,

				HDMI_PHY_ENABLE_MODE_SET);



	/* PHY Power Off */

	hdmiphy_reg_writeb(hdata, HDMIPHY_POWER,

				HDMI_PHY_POWER_OFF);



	/* For PHY Mode Setting */

	hdmiphy_reg_writeb(hdata, HDMIPHY_MODE_SET_DONE,

				HDMI_PHY_DISABLE_MODE_SET);

}



static void hdmiphy_conf_apply(struct hdmi_context *hdata)

drivers/gpu/drm/exynos/regs-hdmi.h

+6 −1
Original line number Diff line number Diff line
@@ -579,7 +579,12 @@ 
#define HDMI_TG_3D			HDMI_TG_BASE(0x00F0)



/* HDMI PHY Registers Offsets*/

#define HDMIPHY_MODE_SET_DONE		(0x7C >> 2)

#define HDMIPHY_POWER		(0x74 >> 2)

#define HDMIPHY_MODE_SET_DONE		(0x7c >> 2)



/* HDMI PHY Values */

#define HDMI_PHY_POWER_ON              0x80

#define HDMI_PHY_POWER_OFF             0xff



/* HDMI PHY Values */

#define HDMI_PHY_DISABLE_MODE_SET	0x80