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Message-ID: <20240215190834.3222812-1-quic_abhinavk@quicinc.com>
Date: Thu, 15 Feb 2024 11:08:34 -0800
From: Abhinav Kumar <quic_abhinavk@...cinc.com>
To: <dri-devel@...ts.freedesktop.org>,
Maarten Lankhorst
<maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
Jani Nikula <jani.nikula@...ux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@...el.com>,
Joonas Lahtinen
<joonas.lahtinen@...ux.intel.com>,
Tvrtko Ursulin
<tvrtko.ursulin@...ux.intel.com>
CC: Abhinav Kumar <quic_abhinavk@...cinc.com>, <robdclark@...il.com>,
<freedreno@...ts.freedesktop.org>, <dmitry.baryshkov@...aro.org>,
<intel-gfx@...ts.freedesktop.org>, <ville.syrjala@...ux.intel.com>,
<quic_jesszhan@...cinc.com>, <linux-kernel@...r.kernel.org>,
<intel-xe@...ts.freedesktop.org>
Subject: [PATCH v2] drm/dp: move intel_dp_vsc_sdp_pack() to generic helper
intel_dp_vsc_sdp_pack() can be re-used by other DRM drivers as well.
Lets move this to drm_dp_helper to achieve this.
changes in v2:
- rebased on top of drm-tip
Acked-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
---
drivers/gpu/drm/display/drm_dp_helper.c | 78 +++++++++++++++++++++++++
drivers/gpu/drm/i915/display/intel_dp.c | 71 +---------------------
include/drm/display/drm_dp_helper.h | 3 +
3 files changed, 83 insertions(+), 69 deletions(-)
diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c
index 8d6ce46471ae..6c91f400ecb1 100644
--- a/drivers/gpu/drm/display/drm_dp_helper.c
+++ b/drivers/gpu/drm/display/drm_dp_helper.c
@@ -2913,6 +2913,84 @@ void drm_dp_vsc_sdp_log(struct drm_printer *p, const struct drm_dp_vsc_sdp *vsc)
}
EXPORT_SYMBOL(drm_dp_vsc_sdp_log);
+/**
+ * drm_dp_vsc_sdp_pack() - pack a given vsc sdp into generic dp_sdp
+ * @vsc: vsc sdp initialized according to its purpose as defined in
+ * table 2-118 - table 2-120 in DP 1.4a specification
+ * @sdp: valid handle to the generic dp_sdp which will be packed
+ * @size: valid size of the passed sdp handle
+ *
+ * Returns length of sdp on success and error code on failure
+ */
+ssize_t drm_dp_vsc_sdp_pack(const struct drm_dp_vsc_sdp *vsc,
+ struct dp_sdp *sdp, size_t size)
+{
+ size_t length = sizeof(struct dp_sdp);
+
+ if (size < length)
+ return -ENOSPC;
+
+ memset(sdp, 0, size);
+
+ /*
+ * Prepare VSC Header for SU as per DP 1.4a spec, Table 2-119
+ * VSC SDP Header Bytes
+ */
+ sdp->sdp_header.HB0 = 0; /* Secondary-Data Packet ID = 0 */
+ sdp->sdp_header.HB1 = vsc->sdp_type; /* Secondary-data Packet Type */
+ sdp->sdp_header.HB2 = vsc->revision; /* Revision Number */
+ sdp->sdp_header.HB3 = vsc->length; /* Number of Valid Data Bytes */
+
+ if (vsc->revision == 0x6) {
+ sdp->db[0] = 1;
+ sdp->db[3] = 1;
+ }
+
+ /*
+ * Revision 0x5 and revision 0x7 supports Pixel Encoding/Colorimetry
+ * Format as per DP 1.4a spec and DP 2.0 respectively.
+ */
+ if (!(vsc->revision == 0x5 || vsc->revision == 0x7))
+ goto out;
+
+ /* VSC SDP Payload for DB16 through DB18 */
+ /* Pixel Encoding and Colorimetry Formats */
+ sdp->db[16] = (vsc->pixelformat & 0xf) << 4; /* DB16[7:4] */
+ sdp->db[16] |= vsc->colorimetry & 0xf; /* DB16[3:0] */
+
+ switch (vsc->bpc) {
+ case 6:
+ /* 6bpc: 0x0 */
+ break;
+ case 8:
+ sdp->db[17] = 0x1; /* DB17[3:0] */
+ break;
+ case 10:
+ sdp->db[17] = 0x2;
+ break;
+ case 12:
+ sdp->db[17] = 0x3;
+ break;
+ case 16:
+ sdp->db[17] = 0x4;
+ break;
+ default:
+ WARN(1, "Missing case %d\n", vsc->bpc);
+ return -EINVAL;
+ }
+
+ /* Dynamic Range and Component Bit Depth */
+ if (vsc->dynamic_range == DP_DYNAMIC_RANGE_CTA)
+ sdp->db[17] |= 0x80; /* DB17[7] */
+
+ /* Content Type */
+ sdp->db[18] = vsc->content_type & 0x7;
+
+out:
+ return length;
+}
+EXPORT_SYMBOL(drm_dp_vsc_sdp_pack);
+
/**
* drm_dp_get_pcon_max_frl_bw() - maximum frl supported by PCON
* @dpcd: DisplayPort configuration data
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 217196196e50..a9458df475e2 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -4089,73 +4089,6 @@ intel_dp_needs_vsc_sdp(const struct intel_crtc_state *crtc_state,
return false;
}
-static ssize_t intel_dp_vsc_sdp_pack(const struct drm_dp_vsc_sdp *vsc,
- struct dp_sdp *sdp, size_t size)
-{
- size_t length = sizeof(struct dp_sdp);
-
- if (size < length)
- return -ENOSPC;
-
- memset(sdp, 0, size);
-
- /*
- * Prepare VSC Header for SU as per DP 1.4a spec, Table 2-119
- * VSC SDP Header Bytes
- */
- sdp->sdp_header.HB0 = 0; /* Secondary-Data Packet ID = 0 */
- sdp->sdp_header.HB1 = vsc->sdp_type; /* Secondary-data Packet Type */
- sdp->sdp_header.HB2 = vsc->revision; /* Revision Number */
- sdp->sdp_header.HB3 = vsc->length; /* Number of Valid Data Bytes */
-
- if (vsc->revision == 0x6) {
- sdp->db[0] = 1;
- sdp->db[3] = 1;
- }
-
- /*
- * Revision 0x5 and revision 0x7 supports Pixel Encoding/Colorimetry
- * Format as per DP 1.4a spec and DP 2.0 respectively.
- */
- if (!(vsc->revision == 0x5 || vsc->revision == 0x7))
- goto out;
-
- /* VSC SDP Payload for DB16 through DB18 */
- /* Pixel Encoding and Colorimetry Formats */
- sdp->db[16] = (vsc->pixelformat & 0xf) << 4; /* DB16[7:4] */
- sdp->db[16] |= vsc->colorimetry & 0xf; /* DB16[3:0] */
-
- switch (vsc->bpc) {
- case 6:
- /* 6bpc: 0x0 */
- break;
- case 8:
- sdp->db[17] = 0x1; /* DB17[3:0] */
- break;
- case 10:
- sdp->db[17] = 0x2;
- break;
- case 12:
- sdp->db[17] = 0x3;
- break;
- case 16:
- sdp->db[17] = 0x4;
- break;
- default:
- MISSING_CASE(vsc->bpc);
- break;
- }
- /* Dynamic Range and Component Bit Depth */
- if (vsc->dynamic_range == DP_DYNAMIC_RANGE_CTA)
- sdp->db[17] |= 0x80; /* DB17[7] */
-
- /* Content Type */
- sdp->db[18] = vsc->content_type & 0x7;
-
-out:
- return length;
-}
-
static ssize_t
intel_dp_hdr_metadata_infoframe_sdp_pack(struct drm_i915_private *i915,
const struct hdmi_drm_infoframe *drm_infoframe,
@@ -4248,8 +4181,8 @@ static void intel_write_dp_sdp(struct intel_encoder *encoder,
switch (type) {
case DP_SDP_VSC:
- len = intel_dp_vsc_sdp_pack(&crtc_state->infoframes.vsc, &sdp,
- sizeof(sdp));
+ len = drm_dp_vsc_sdp_pack(&crtc_state->infoframes.vsc, &sdp,
+ sizeof(sdp));
break;
case HDMI_PACKET_TYPE_GAMUT_METADATA:
len = intel_dp_hdr_metadata_infoframe_sdp_pack(dev_priv,
diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h
index d02014a87f12..8474504d4c88 100644
--- a/include/drm/display/drm_dp_helper.h
+++ b/include/drm/display/drm_dp_helper.h
@@ -812,4 +812,7 @@ int drm_dp_bw_overhead(int lane_count, int hactive,
int bpp_x16, unsigned long flags);
int drm_dp_bw_channel_coding_efficiency(bool is_uhbr);
+ssize_t drm_dp_vsc_sdp_pack(const struct drm_dp_vsc_sdp *vsc,
+ struct dp_sdp *sdp, size_t size);
+
#endif /* _DRM_DP_HELPER_H_ */
--
2.34.1
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