From: Maxime Ripard <maxime@cerno.tech>
To: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Thomas Zimmermann <tzimmermann@suse.de>,
Maxime Ripard <maxime@cerno.tech>,
dri-devel@lists.freedesktop.org,
Daniel Vetter <daniel.vetter@intel.com>,
David Airlie <airlied@linux.ie>
Cc: Eric Anholt <eric@anholt.net>,
Nicolas Saenz Julienne <nsaenz@kernel.org>,
bcm-kernel-feedback-list@broadcom.com,
linux-rpi-kernel@lists.infradead.org,
Dave Stevenson <dave.stevenson@raspberrypi.com>,
Phil Elwell <phil@raspberrypi.com>,
Tim Gover <tim.gover@raspberrypi.com>,
Dom Cobley <dom@raspberrypi.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH v4 10/12] drm/vc4: hdmi: Enable the scrambler
Date: Fri, 7 May 2021 17:05:13 +0200 [thread overview]
Message-ID: <20210507150515.257424-11-maxime@cerno.tech> (raw)
In-Reply-To: <20210507150515.257424-1-maxime@cerno.tech>
The HDMI controller on the BCM2711 includes a scrambler in order to
reach the HDMI 2.0 modes that require it. Let's add the support for it.
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 64 +++++++++++++++++++++++++++++
drivers/gpu/drm/vc4/vc4_hdmi_regs.h | 3 ++
2 files changed, 67 insertions(+)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 01d24ce8a795..bda12fea0dce 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -35,6 +35,7 @@
#include <drm/drm_edid.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
+#include <drm/drm_scdc_helper.h>
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/i2c.h>
@@ -76,6 +77,8 @@
#define VC5_HDMI_VERTB_VSPO_SHIFT 16
#define VC5_HDMI_VERTB_VSPO_MASK VC4_MASK(29, 16)
+#define VC5_HDMI_SCRAMBLER_CTL_ENABLE BIT(0)
+
#define VC5_HDMI_DEEP_COLOR_CONFIG_1_INIT_PACK_PHASE_SHIFT 8
#define VC5_HDMI_DEEP_COLOR_CONFIG_1_INIT_PACK_PHASE_MASK VC4_MASK(10, 8)
@@ -462,6 +465,64 @@ static void vc4_hdmi_set_infoframes(struct drm_encoder *encoder)
vc4_hdmi_set_audio_infoframe(encoder);
}
+static bool vc4_hdmi_supports_scrambling(struct drm_encoder *encoder,
+ struct drm_display_mode *mode)
+{
+ struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
+ struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+ struct drm_display_info *display = &vc4_hdmi->connector.display_info;
+
+ if (!vc4_encoder->hdmi_monitor)
+ return false;
+
+ if (!display->hdmi.scdc.supported ||
+ !display->hdmi.scdc.scrambling.supported)
+ return false;
+
+ return true;
+}
+
+static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder)
+{
+ struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
+ struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+
+ if (!vc4_hdmi_supports_scrambling(encoder, mode))
+ return;
+
+ if (!vc4_hdmi_mode_needs_scrambling(mode))
+ return;
+
+ drm_scdc_set_high_tmds_clock_ratio(vc4_hdmi->ddc, true);
+ drm_scdc_set_scrambling(vc4_hdmi->ddc, true);
+
+ HDMI_WRITE(HDMI_SCRAMBLER_CTL, HDMI_READ(HDMI_SCRAMBLER_CTL) |
+ VC5_HDMI_SCRAMBLER_CTL_ENABLE);
+}
+
+static void vc4_hdmi_disable_scrambling(struct drm_encoder *encoder)
+{
+ struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+ struct drm_crtc *crtc = encoder->crtc;
+
+ /*
+ * At boot, encoder->crtc will be NULL. Since we don't know the
+ * state of the scrambler and in order to avoid any
+ * inconsistency, let's disable it all the time.
+ */
+ if (crtc && !vc4_hdmi_supports_scrambling(encoder, &crtc->mode))
+ return;
+
+ if (crtc && !vc4_hdmi_mode_needs_scrambling(&crtc->mode))
+ return;
+
+ HDMI_WRITE(HDMI_SCRAMBLER_CTL, HDMI_READ(HDMI_SCRAMBLER_CTL) &
+ ~VC5_HDMI_SCRAMBLER_CTL_ENABLE);
+
+ drm_scdc_set_scrambling(vc4_hdmi->ddc, false);
+ drm_scdc_set_high_tmds_clock_ratio(vc4_hdmi->ddc, false);
+}
+
static void vc4_hdmi_encoder_post_crtc_disable(struct drm_encoder *encoder,
struct drm_atomic_state *state)
{
@@ -474,6 +535,8 @@ static void vc4_hdmi_encoder_post_crtc_disable(struct drm_encoder *encoder,
HDMI_WRITE(HDMI_VID_CTL,
HDMI_READ(HDMI_VID_CTL) | VC4_HD_VID_CTL_BLANKPIX);
+
+ vc4_hdmi_disable_scrambling(encoder);
}
static void vc4_hdmi_encoder_post_crtc_powerdown(struct drm_encoder *encoder,
@@ -924,6 +987,7 @@ static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder,
}
vc4_hdmi_recenter_fifo(vc4_hdmi);
+ vc4_hdmi_enable_scrambling(encoder);
}
static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi_regs.h b/drivers/gpu/drm/vc4/vc4_hdmi_regs.h
index e1b58eac766f..19d2fdc446bc 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi_regs.h
+++ b/drivers/gpu/drm/vc4/vc4_hdmi_regs.h
@@ -100,6 +100,7 @@ enum vc4_hdmi_field {
HDMI_RM_FORMAT,
HDMI_RM_OFFSET,
HDMI_SCHEDULER_CONTROL,
+ HDMI_SCRAMBLER_CTL,
HDMI_SW_RESET_CONTROL,
HDMI_TX_PHY_CHANNEL_SWAP,
HDMI_TX_PHY_CLK_DIV,
@@ -238,6 +239,7 @@ static const struct vc4_hdmi_register __maybe_unused vc5_hdmi_hdmi0_fields[] = {
VC4_HDMI_REG(HDMI_GCP_CONFIG, 0x178),
VC4_HDMI_REG(HDMI_GCP_WORD_1, 0x17c),
VC4_HDMI_REG(HDMI_HOTPLUG, 0x1a8),
+ VC4_HDMI_REG(HDMI_SCRAMBLER_CTL, 0x1c4),
VC5_DVP_REG(HDMI_CLOCK_STOP, 0x0bc),
VC5_DVP_REG(HDMI_VEC_INTERFACE_XBAR, 0x0f0),
@@ -317,6 +319,7 @@ static const struct vc4_hdmi_register __maybe_unused vc5_hdmi_hdmi1_fields[] = {
VC4_HDMI_REG(HDMI_GCP_CONFIG, 0x178),
VC4_HDMI_REG(HDMI_GCP_WORD_1, 0x17c),
VC4_HDMI_REG(HDMI_HOTPLUG, 0x1a8),
+ VC4_HDMI_REG(HDMI_SCRAMBLER_CTL, 0x1c4),
VC5_DVP_REG(HDMI_CLOCK_STOP, 0x0bc),
VC5_DVP_REG(HDMI_VEC_INTERFACE_XBAR, 0x0f0),
--
2.31.1
next prev parent reply other threads:[~2021-05-07 15:06 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-07 15:05 [PATCH v4 00/12] drm/vc4: hdmi: Support the 4k @ 60Hz modes Maxime Ripard
2021-05-07 15:05 ` [PATCH v4 01/12] drm/vc4: txp: Properly set the possible_crtcs mask Maxime Ripard
2021-05-07 15:05 ` [PATCH v4 02/12] drm/vc4: crtc: Skip the TXP Maxime Ripard
2021-05-07 15:05 ` [PATCH v4 03/12] drm/vc4: crtc: Pass the drm_atomic_state to config_pv Maxime Ripard
2021-05-21 17:26 ` Dave Stevenson
2021-05-07 15:05 ` [PATCH v4 04/12] drm/vc4: crtc: Fix vc4_get_crtc_encoder logic Maxime Ripard
2021-05-21 17:54 ` Dave Stevenson
2021-05-07 15:05 ` [PATCH v4 05/12] drm/vc4: crtc: Lookup the encoder from the register at boot Maxime Ripard
2021-05-21 17:58 ` Dave Stevenson
2021-05-07 15:05 ` [PATCH v4 06/12] drm/vc4: hdmi: Prevent clock unbalance Maxime Ripard
2021-05-21 18:05 ` Dave Stevenson
2021-05-07 15:05 ` [PATCH v4 07/12] drm/vc4: hvs: Make the HVS bind first Maxime Ripard
2021-05-07 15:05 ` [PATCH v4 08/12] drm/vc4: hdmi: Properly compute the BVB clock rate Maxime Ripard
2021-05-07 15:05 ` [PATCH v4 09/12] drm/vc4: hdmi: Check and warn if we can't reach 4kp60 frequencies Maxime Ripard
2021-05-07 15:05 ` Maxime Ripard [this message]
2021-05-21 17:39 ` [PATCH v4 10/12] drm/vc4: hdmi: Enable the scrambler Dave Stevenson
2021-05-07 15:05 ` [PATCH v4 11/12] drm/vc4: hdmi: Add a workqueue to set scrambling Maxime Ripard
2021-05-21 17:43 ` Dave Stevenson
2021-05-07 15:05 ` [PATCH v4 12/12] drm/vc4: hdmi: Raise the maximum clock rate Maxime Ripard
2021-05-24 12:45 ` [PATCH v4 00/12] drm/vc4: hdmi: Support the 4k @ 60Hz modes Maxime Ripard
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210507150515.257424-11-maxime@cerno.tech \
--to=maxime@cerno.tech \
--cc=airlied@linux.ie \
--cc=bcm-kernel-feedback-list@broadcom.com \
--cc=daniel.vetter@intel.com \
--cc=dave.stevenson@raspberrypi.com \
--cc=dom@raspberrypi.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=eric@anholt.net \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rpi-kernel@lists.infradead.org \
--cc=maarten.lankhorst@linux.intel.com \
--cc=nsaenz@kernel.org \
--cc=phil@raspberrypi.com \
--cc=tim.gover@raspberrypi.com \
--cc=tzimmermann@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).