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Subject[PATCH v3 083/105] drm/vc4: hdmi: Add PHY RNG enable / disable function
Date
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>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 15 +++++++++------
drivers/gpu/drm/vc4/vc4_hdmi.h | 8 ++++++++
drivers/gpu/drm/vc4/vc4_hdmi_phy.c | 15 +++++++++++++++
3 files changed, 32 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 3d5e35aa96ff..133c7453e588 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -762,9 +762,9 @@ 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,
@@ -776,9 +776,10 @@ 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;
@@ -1414,6 +1415,8 @@ 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[] = {
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h
index 39ae5273f36b..9ae4d2c5a4f0 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.h
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.h
@@ -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_ */
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi_phy.c b/drivers/gpu/drm/vc4/vc4_hdmi_phy.c
index 5a1746877bb5..93287e24d7d1 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi_phy.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi_phy.c
@@ -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);
+}
--
git-series 0.9.1
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