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drm/vc4: hdmi: Add PHY RNG enable / disable function

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Let's continue the implementation of hooks for the parts that change in the
BCM2711 SoC with the PHY RNG setup.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
This commit is contained in:
Maxime Ripard
2019-12-19 17:22:24 +01:00
committed by popcornmix
parent 9fe77147d4
commit ddf78df1db
3 changed files with 32 additions and 6 deletions
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15
drivers/gpu/drm/vc4/vc4_hdmi.c
View File

@@ -765,9 +765,9 @@ static int vc4_hdmi_audio_trigger(struct snd_pcm_substream *substream, int cmd,
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
vc4_hdmi_set_audio_infoframe(encoder);
HDMI_WRITE(HDMI_TX_PHY_CTL_0,
HDMI_READ(HDMI_TX_PHY_CTL_0) &
~VC4_HDMI_TX_PHY_RNG_PWRDN);
if (vc4_hdmi->variant->phy_rng_enable)
vc4_hdmi->variant->phy_rng_enable(vc4_hdmi);
HDMI_WRITE(HDMI_MAI_CTL,
VC4_SET_FIELD(vc4_hdmi->audio.channels,
@@ -779,9 +779,10 @@ static int vc4_hdmi_audio_trigger(struct snd_pcm_substream *substream, int cmd,
VC4_HD_MAI_CTL_DLATE |
VC4_HD_MAI_CTL_ERRORE |
VC4_HD_MAI_CTL_ERRORF);
HDMI_WRITE(HDMI_TX_PHY_CTL_0,
HDMI_READ(HDMI_TX_PHY_CTL_0) |
VC4_HDMI_TX_PHY_RNG_PWRDN);
if (vc4_hdmi->variant->phy_rng_disable)
vc4_hdmi->variant->phy_rng_disable(vc4_hdmi);
break;
default:
break;
@@ -1428,6 +1429,8 @@ static const struct vc4_hdmi_variant bcm2835_variant = {
.reset = vc4_hdmi_reset,
.phy_init = vc4_hdmi_phy_init,
.phy_disable = vc4_hdmi_phy_disable,
.phy_rng_enable = vc4_hdmi_phy_rng_enable,
.phy_rng_disable = vc4_hdmi_phy_rng_disable,
};
static const struct of_device_id vc4_hdmi_dt_match[] = {

8
drivers/gpu/drm/vc4/vc4_hdmi.h
View File

@@ -47,6 +47,12 @@ struct vc4_hdmi_variant {
/* Callback to disable the PHY */
void (*phy_disable)(struct vc4_hdmi *vc4_hdmi);
/* Callback to enable the RNG in the PHY */
void (*phy_rng_enable)(struct vc4_hdmi *vc4_hdmi);
/* Callback to disable the RNG in the PHY */
void (*phy_rng_disable)(struct vc4_hdmi *vc4_hdmi);
};
/* HDMI audio information */
@@ -107,5 +113,7 @@ encoder_to_vc4_hdmi(struct drm_encoder *encoder)
void vc4_hdmi_phy_init(struct vc4_hdmi *vc4_hdmi,
struct drm_display_mode *mode);
void vc4_hdmi_phy_disable(struct vc4_hdmi *vc4_hdmi);
void vc4_hdmi_phy_rng_enable(struct vc4_hdmi *vc4_hdmi);
void vc4_hdmi_phy_rng_disable(struct vc4_hdmi *vc4_hdmi);
#endif /* _VC4_HDMI_H_ */

15
drivers/gpu/drm/vc4/vc4_hdmi_phy.c
View File

@@ -7,6 +7,7 @@
*/
#include "vc4_hdmi.h"
#include "vc4_regs.h"
#include "vc4_hdmi_regs.h"
void vc4_hdmi_phy_init(struct vc4_hdmi *vc4_hdmi, struct drm_display_mode *mode)
@@ -23,3 +24,17 @@ void vc4_hdmi_phy_disable(struct vc4_hdmi *vc4_hdmi)
{
HDMI_WRITE(HDMI_TX_PHY_RESET_CTL, 0xf << 16);
}
void vc4_hdmi_phy_rng_enable(struct vc4_hdmi *vc4_hdmi)
{
HDMI_WRITE(HDMI_TX_PHY_CTL_0,
HDMI_READ(HDMI_TX_PHY_CTL_0) &
~VC4_HDMI_TX_PHY_RNG_PWRDN);
}
void vc4_hdmi_phy_rng_disable(struct vc4_hdmi *vc4_hdmi)
{
HDMI_WRITE(HDMI_TX_PHY_CTL_0,
HDMI_READ(HDMI_TX_PHY_CTL_0) |
VC4_HDMI_TX_PHY_RNG_PWRDN);
}