linux-kernel - [RFC PATCH 01/13] drm/dsc: Add dsc pps header init function

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Date:   Fri, 21 May 2021 18:19:30 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Rob Clark <robdclark@...il.com>
Cc:     linux-arm-msm@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Vinod Koul <vkoul@...nel.org>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Jonathan Marek <jonathan@...ek.ca>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Abhinav Kumar <abhinavk@...eaurora.org>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org
Subject: [RFC PATCH 01/13] drm/dsc: Add dsc pps header init function

We required a helper to create and set the dsc_dce_header, so add the
dsc_dce_header and API drm_dsc_dsi_pps_header_init

Signed-off-by: Vinod Koul <vkoul@...nel.org>
---
 drivers/gpu/drm/drm_dsc.c | 11 +++++++++++
 include/drm/drm_dsc.h     | 16 ++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/drivers/gpu/drm/drm_dsc.c b/drivers/gpu/drm/drm_dsc.c
index ff602f7ec65b..0c1b745090e2 100644
--- a/drivers/gpu/drm/drm_dsc.c
+++ b/drivers/gpu/drm/drm_dsc.c
@@ -49,6 +49,17 @@ void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header)
 }
 EXPORT_SYMBOL(drm_dsc_dp_pps_header_init);
 
+void drm_dsc_dsi_pps_header_init(struct dsc_dce_header *dsc_header)
+{
+	memset(dsc_header, 0, sizeof(*dsc_header));
+
+	dsc_header->bp0 = 0x0A;
+	dsc_header->bp1 = 1;
+	dsc_header->bp4 = 10;
+	dsc_header->bp6 = 128;
+}
+EXPORT_SYMBOL(drm_dsc_dsi_pps_header_init);
+
 /**
  * drm_dsc_dp_rc_buffer_size - get rc buffer size in bytes
  * @rc_buffer_block_size: block size code, according to DPCD offset 62h
diff --git a/include/drm/drm_dsc.h b/include/drm/drm_dsc.h
index bbe120f461e5..5a3bbeb3e12f 100644
--- a/include/drm/drm_dsc.h
+++ b/include/drm/drm_dsc.h
@@ -602,8 +602,24 @@ struct drm_dsc_pps_infoframe {
 	struct drm_dsc_picture_parameter_set pps_payload;
 } __packed;
 
+struct dsc_dce_header {
+	u8 bp0;
+	u8 bp1;
+	u8 bp2;
+	u8 bp3;
+	u8 bp4;
+	u8 bp5;
+	u8 bp6;
+} __packed;
+
+struct drm_dsi_dsc_infoframe {
+	struct dsc_dce_header dsc_header;
+	struct drm_dsc_picture_parameter_set pps_payload;
+} __packed;
+
 void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header);
 int drm_dsc_dp_rc_buffer_size(u8 rc_buffer_block_size, u8 rc_buffer_size);
+void drm_dsc_dsi_pps_header_init(struct dsc_dce_header *dsc_header);
 void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_sdp,
 				const struct drm_dsc_config *dsc_cfg);
 int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg);
-- 
2.26.3