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Message-Id: <20231031-kms-hdmi-connector-state-v3-6-328b0fae43a7@kernel.org>
Date: Tue, 31 Oct 2023 17:48:19 +0100
From: Maxime Ripard <mripard@...nel.org>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>, Emma Anholt <emma@...olt.net>,
Jonathan Corbet <corbet@....net>,
Sandy Huang <hjc@...k-chips.com>,
Heiko Stübner <heiko@...ech.de>,
Chen-Yu Tsai <wens@...e.org>,
Jernej Skrabec <jernej.skrabec@...il.com>,
Samuel Holland <samuel@...lland.org>
Cc: Hans Verkuil <hverkuil@...all.nl>, dri-devel@...ts.freedesktop.org,
linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
linux-rockchip@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
Maxime Ripard <mripard@...nel.org>
Subject: [PATCH RFC v3 06/37] drm/connector: hdmi: Add support for output
format
Just like BPC, we'll add support for automatic selection of the output
format for HDMI connectors.
Let's add the needed defaults and fields for now.
Signed-off-by: Maxime Ripard <mripard@...nel.org>
---
drivers/gpu/drm/drm_atomic.c | 2 ++
drivers/gpu/drm/drm_atomic_state_helper.c | 4 +++-
drivers/gpu/drm/drm_connector.c | 28 ++++++++++++++++++++++++++++
include/drm/drm_connector.h | 16 ++++++++++++++++
4 files changed, 49 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 51aac1b2aaaf..0ebe1142dcfe 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -1148,6 +1148,8 @@ static void drm_atomic_connector_print_state(struct drm_printer *p,
drm_hdmi_connector_get_broadcast_rgb_name(state->hdmi.broadcast_rgb));
drm_printf(p, "\tis_full_range=%c\n", state->hdmi.is_full_range ? 'y' : 'n');
drm_printf(p, "\toutput_bpc=%u\n", state->hdmi.output_bpc);
+ drm_printf(p, "\toutput_format=%s\n",
+ drm_hdmi_connector_get_output_format_name(state->hdmi.output_format));
}
if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
index 406ba358aa14..37262dd002c8 100644
--- a/drivers/gpu/drm/drm_atomic_state_helper.c
+++ b/drivers/gpu/drm/drm_atomic_state_helper.c
@@ -575,6 +575,7 @@ void __drm_atomic_helper_connector_hdmi_reset(struct drm_connector *connector,
new_state->max_bpc = max_bpc;
new_state->max_requested_bpc = max_bpc;
new_state->hdmi.output_bpc = max_bpc;
+ new_state->hdmi.output_format = HDMI_COLORSPACE_RGB;
new_state->hdmi.broadcast_rgb = DRM_HDMI_BROADCAST_RGB_AUTO;
}
EXPORT_SYMBOL(__drm_atomic_helper_connector_hdmi_reset);
@@ -692,7 +693,8 @@ int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector,
new_state->hdmi.is_full_range = hdmi_is_full_range(connector, new_state);
if (old_state->hdmi.broadcast_rgb != new_state->hdmi.broadcast_rgb ||
- old_state->hdmi.output_bpc != new_state->hdmi.output_bpc) {
+ old_state->hdmi.output_bpc != new_state->hdmi.output_bpc ||
+ old_state->hdmi.output_format != new_state->hdmi.output_format) {
struct drm_crtc *crtc = new_state->crtc;
struct drm_crtc_state *crtc_state;
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 508d1c667732..9037e1b1b383 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -459,6 +459,7 @@ EXPORT_SYMBOL(drmm_connector_init);
* @funcs: callbacks for this connector
* @connector_type: user visible type of the connector
* @ddc: optional pointer to the associated ddc adapter
+ * @supported_formats: Bitmask of @hdmi_colorspace listing supported output formats
* @max_bpc: Maximum bits per char the HDMI connector supports
*
* Initialises a preallocated HDMI connector. Connectors can be
@@ -477,6 +478,7 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
const struct drm_connector_funcs *funcs,
int connector_type,
struct i2c_adapter *ddc,
+ unsigned long supported_formats,
unsigned int max_bpc)
{
int ret;
@@ -489,6 +491,8 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
if (ret)
return ret;
+ connector->hdmi.supported_formats = supported_formats;
+
if (max_bpc) {
if (!(max_bpc == 8 || max_bpc == 10 || max_bpc == 12))
return -EINVAL;
@@ -1215,6 +1219,30 @@ drm_hdmi_connector_get_broadcast_rgb_name(enum drm_hdmi_broadcast_rgb broadcast_
}
EXPORT_SYMBOL(drm_hdmi_connector_get_broadcast_rgb_name);
+static const char * const output_format_str[] = {
+ [HDMI_COLORSPACE_RGB] = "RGB",
+ [HDMI_COLORSPACE_YUV420] = "YUV 4:2:0",
+ [HDMI_COLORSPACE_YUV422] = "YUV 4:2:2",
+ [HDMI_COLORSPACE_YUV444] = "YUV 4:4:4",
+};
+
+/*
+ * drm_hdmi_connector_get_output_format_name() - Return a string for HDMI connector output format
+ * @fmt: Output format to compute name of
+ *
+ * Returns: the name of the output format, or NULL if the type is not
+ * valid.
+ */
+const char *
+drm_hdmi_connector_get_output_format_name(enum hdmi_colorspace fmt)
+{
+ if (fmt >= ARRAY_SIZE(output_format_str))
+ return NULL;
+
+ return output_format_str[fmt];
+}
+EXPORT_SYMBOL(drm_hdmi_connector_get_output_format_name);
+
/**
* DOC: standard connector properties
*
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 2d664b6ac0a6..32f0b3b7383e 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -391,6 +391,8 @@ enum drm_hdmi_broadcast_rgb {
const char *
drm_hdmi_connector_get_broadcast_rgb_name(enum drm_hdmi_broadcast_rgb broadcast_rgb);
+const char *
+drm_hdmi_connector_get_output_format_name(enum hdmi_colorspace fmt);
/**
* struct drm_monitor_range_info - Panel's Monitor range in EDID for
@@ -1064,6 +1066,11 @@ struct drm_connector_state {
* @output_bpc: Bits per color channel to output.
*/
unsigned int output_bpc;
+
+ /**
+ * @output_format: Pixel format to output in.
+ */
+ enum hdmi_colorspace output_format;
} hdmi;
};
@@ -1930,6 +1937,14 @@ struct drm_connector {
/** @hdr_sink_metadata: HDR Metadata Information read from sink */
struct hdr_sink_metadata hdr_sink_metadata;
+
+ struct {
+ /**
+ * @supported_formats: Bitmask of @hdmi_colorspace
+ * supported by the controller.
+ */
+ unsigned long supported_formats;
+ } hdmi;
};
#define obj_to_connector(x) container_of(x, struct drm_connector, base)
@@ -1953,6 +1968,7 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
const struct drm_connector_funcs *funcs,
int connector_type,
struct i2c_adapter *ddc,
+ unsigned long supported_formats,
unsigned int max_bpc);
void drm_connector_attach_edid_property(struct drm_connector *connector);
int drm_connector_register(struct drm_connector *connector);
--
2.41.0
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