linux-kernel - [PATCH v2 1/3] drm: bridge: cdns-mhdp8546: Modify atomic_get_input_bus

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Date:   Wed, 18 Nov 2020 15:03:26 +0100
From:   Yuti Amonkar <yamonkar@...ence.com>
To:     <linux-kernel@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <maxime@...no.tech>, <airlied@...ux.ie>, <daniel@...ll.ch>,
        <mark.rutland@....com>, <a.hajda@...sung.com>,
        <narmstrong@...libre.com>, <Laurent.pinchart@...asonboard.com>,
        <jonas@...boo.se>, <jernej.skrabec@...l.net>
CC:     <nsekhar@...com>, <jsarha@...com>, <tomi.valkeinen@...com>,
        <nikhil.nd@...com>, <mparab@...ence.com>, <sjakhade@...ence.com>,
        <yamonkar@...ence.com>
Subject: [PATCH v2 1/3] drm: bridge: cdns-mhdp8546: Modify atomic_get_input_bus_format bridge function

Modify atomic_get_input_bus_format function to return input formats
supported instead of using hardcoded value.

Signed-off-by: Yuti Amonkar <yamonkar@...ence.com>
---
 .../drm/bridge/cadence/cdns-mhdp8546-core.c   | 45 ++++++++++++++-----
 1 file changed, 35 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
index 6beccd2a408e..7c80555ab4ab 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
@@ -2078,27 +2078,52 @@ cdns_mhdp_bridge_atomic_reset(struct drm_bridge *bridge)
 	return &cdns_mhdp_state->base;
 }
 
+#define MAX_INPUT_FORMAT 11
+
 static u32 *cdns_mhdp_get_input_bus_fmts(struct drm_bridge *bridge,
-				      struct drm_bridge_state *bridge_state,
-				      struct drm_crtc_state *crtc_state,
-				      struct drm_connector_state *conn_state,
-				      u32 output_fmt,
-				      unsigned int *num_input_fmts)
-{
+					 struct drm_bridge_state *bridge_state,
+					 struct drm_crtc_state *crtc_state,
+					 struct drm_connector_state *conn_state,
+					 u32 output_fmt,
+					 unsigned int *num_input_fmts)
+{
+	struct drm_connector *conn = conn_state->connector;
+	struct drm_display_info *info = &conn->display_info;
 	u32 *input_fmts;
-	u32 default_bus_format = MEDIA_BUS_FMT_RGB121212_1X36;
+	unsigned int i = 0;
 
 	*num_input_fmts = 0;
 
 	if (output_fmt != MEDIA_BUS_FMT_FIXED)
 		return NULL;
 
-	input_fmts = kzalloc(sizeof(*input_fmts), GFP_KERNEL);
+	input_fmts = kcalloc(MAX_INPUT_FORMAT,
+			     sizeof(*input_fmts), GFP_KERNEL);
 	if (!input_fmts)
 		return NULL;
 
-	*num_input_fmts = 1;
-	input_fmts[0] = default_bus_format;
+	if (info->color_formats & DRM_COLOR_FORMAT_RGB444) {
+		input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24;
+		input_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30;
+		input_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36;
+		input_fmts[i++] = MEDIA_BUS_FMT_RGB161616_1X48;
+	}
+
+	if (info->color_formats & DRM_COLOR_FORMAT_YCRCB444) {
+		input_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24;
+		input_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30;
+		input_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36;
+		input_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48;
+	}
+
+	if (info->color_formats & DRM_COLOR_FORMAT_YCRCB422) {
+		input_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16;
+		input_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20;
+		input_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24;
+	}
+
+	*num_input_fmts = i;
+
 	return input_fmts;
 }
 
-- 
2.17.1