From: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
To: intel-gfx@lists.freedesktop.org
Cc: vandita.kulkarni@intel.com, uma.shankar@intel.com,
dri-devel@lists.freedesktop.org, swati2.sharma@intel.com
Subject: [PATCH v2 11/13] drm/i915: Read DSC capabilities of the HDMI2.1 PCON encoder
Date: Sun, 1 Nov 2020 15:36:55 +0530 [thread overview]
Message-ID: <20201101100657.12087-12-ankit.k.nautiyal@intel.com> (raw)
In-Reply-To: <20201101100657.12087-1-ankit.k.nautiyal@intel.com>
This patch adds support to read and store the DSC capabilities of the
HDMI2.1 PCon encoder. It also adds a new field to store these caps,
The caps are read during dfp update and can later be used to get the
PPS parameters for PCON-HDMI2.1 sink pair. Which inturn will be used
to take a call to override the existing PPS-metadata, by either
writing the entire new PPS metadata, or by writing only the
PPS override parameters.
v2: Restructured the code to read all capability DPCDs at once and store
in an array in intel_dp structure.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
---
.../drm/i915/display/intel_display_types.h | 1 +
drivers/gpu/drm/i915/display/intel_dp.c | 20 +++++++++++++++++++
2 files changed, 21 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 2c58d63928b8..f43ded030c14 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1309,6 +1309,7 @@ struct intel_dp {
u8 lttpr_common_caps[DP_LTTPR_COMMON_CAP_SIZE];
u8 lttpr_phy_caps[DP_MAX_LTTPR_COUNT][DP_LTTPR_PHY_CAP_SIZE];
u8 fec_capable;
+ u8 pcon_dsc_dpcd[DP_PCON_DSC_ENCODER_CAP_SIZE];
/* source rates */
int num_source_rates;
const int *source_rates;
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 6177169c4401..2e7ddb062efe 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -3869,6 +3869,24 @@ cpt_set_link_train(struct intel_dp *intel_dp,
intel_de_posting_read(dev_priv, intel_dp->output_reg);
}
+static void intel_dp_get_pcon_dsc_cap(struct intel_dp *intel_dp)
+{
+ struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+
+ /* Clear the cached register set to avoid using stale values */
+
+ memset(intel_dp->pcon_dsc_dpcd, 0, sizeof(intel_dp->pcon_dsc_dpcd));
+
+ if (drm_dp_dpcd_read(&intel_dp->aux, DP_PCON_DSC_ENCODER,
+ intel_dp->pcon_dsc_dpcd,
+ sizeof(intel_dp->pcon_dsc_dpcd)) < 0)
+ drm_err(&i915->drm, "Failed to read DPCD register 0x%x\n",
+ DP_PCON_DSC_ENCODER);
+
+ drm_dbg_kms(&i915->drm, "PCON ENCODER DSC DPCD: %*ph\n",
+ (int)sizeof(intel_dp->pcon_dsc_dpcd), intel_dp->pcon_dsc_dpcd);
+}
+
static int intel_dp_get_max_rate_gbps(struct intel_dp *intel_dp)
{
int max_link_clock, max_lanes, max_rate_khz, max_rate_gbps;
@@ -6645,6 +6663,8 @@ intel_dp_update_dfp(struct intel_dp *intel_dp,
intel_dp->dfp.max_tmds_clock,
intel_dp->dfp.pcon_max_frl_bw,
intel_dp->dfp.sink_max_frl_bw);
+
+ intel_dp_get_pcon_dsc_cap(intel_dp);
}
static void
--
2.17.1
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next prev parent reply other threads:[~2020-11-01 10:14 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-01 10:06 [PATCH v2 00/13] Add support for DP-HDMI2.1 PCON Ankit Nautiyal
2020-11-01 10:06 ` [PATCH v2 01/13] drm/edid: Add additional HFVSDB fields for HDMI2.1 Ankit Nautiyal
2020-11-19 6:12 ` Shankar, Uma
2020-11-01 10:06 ` [PATCH v2 02/13] drm/edid: Parse MAX_FRL field from HFVSDB block Ankit Nautiyal
2020-11-19 6:13 ` Shankar, Uma
2020-11-01 10:06 ` [PATCH v2 03/13] drm/edid: Parse DSC1.2 cap fields " Ankit Nautiyal
2020-11-19 6:27 ` Shankar, Uma
2020-11-01 10:06 ` [PATCH v2 04/13] drm/dp_helper: Add Helpers for FRL Link Training support for DP-HDMI2.1 PCON Ankit Nautiyal
2020-11-19 7:47 ` Shankar, Uma
2020-11-01 10:06 ` [PATCH v2 05/13] drm/dp_helper: Add support for link failure detection Ankit Nautiyal
2020-11-19 7:52 ` Shankar, Uma
2020-11-01 10:06 ` [PATCH v2 06/13] drm/dp_helper: Add support for Configuring DSC for HDMI2.1 Pcon Ankit Nautiyal
2020-11-19 8:00 ` Shankar, Uma
2020-11-01 10:06 ` [PATCH v2 07/13] drm/i915: Capture max frl rate for PCON in dfp cap structure Ankit Nautiyal
2020-11-19 10:07 ` Shankar, Uma
2020-11-01 10:06 ` [PATCH v2 08/13] drm/i915: Add support for starting FRL training for HDMI2.1 via PCON Ankit Nautiyal
2020-11-19 10:23 ` Shankar, Uma
2020-11-01 10:06 ` [PATCH v2 09/13] drm/i915: Check for FRL training before DP Link training Ankit Nautiyal
2020-11-19 11:19 ` Shankar, Uma
2020-11-01 10:06 ` [PATCH v2 10/13] drm/i915: Add support for enabling link status and recovery Ankit Nautiyal
2020-11-19 11:22 ` Shankar, Uma
2020-11-01 10:06 ` Ankit Nautiyal [this message]
2020-11-19 11:29 ` [PATCH v2 11/13] drm/i915: Read DSC capabilities of the HDMI2.1 PCON encoder Shankar, Uma
2020-11-01 10:06 ` [PATCH v2 12/13] drm/i915: Add helper functions for calculating DSC parameters for HDMI2.1 Ankit Nautiyal
2020-11-25 20:28 ` Shankar, Uma
2020-12-02 14:13 ` Nautiyal, Ankit K
2020-11-01 10:06 ` [PATCH v2 13/13] drm/i915: Configure PCON for DSC1.1 to DSC1.2 encoding Ankit Nautiyal
2020-11-25 20:45 ` Shankar, Uma
2020-12-02 14:19 ` Nautiyal, Ankit K
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