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drm/connector: Add TV standard property 

The TV mode property has been around for a while now to select and get the
current TV mode output on an analog TV connector.

Despite that property name being generic, its content isn't and has been
driver-specific which makes it hard to build any generic behaviour on top
of it, both in kernel and user-space.

Let's create a new enum tv norm property, that can contain any of the
analog TV standards currently supported by kernel drivers. Each driver can
then pass in a bitmask of the modes it supports, and the property
creation function will filter out the modes not supported.

We'll then be able to phase out the older tv mode property.

Tested-by: Mateusz Kwiatkowski <kfyatek+publicgit@gmail.com>
Acked-in-principle-or-something-like-that-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://lore.kernel.org/r/20220728-rpi-analog-tv-properties-v10-5-256dad125326@cerno.tech
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
This commit is contained in:
Maxime Ripard 2022-11-17 10:28:48 +01:00
parent 80ed86d4b6
commit 7d63cd8526
No known key found for this signature in database
GPG Key ID: E3EF0D6F671851C5
5 changed files with 203 additions and 1 deletions
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6
Documentation/gpu/drm-kms.rst
View File

@ -520,6 +520,12 @@ HDMI Specific Connector Properties
.. kernel-doc:: drivers/gpu/drm/drm_connector.c
:doc: HDMI connector properties
Analog TV Specific Connector Properties
----------------------------------
.. kernel-doc:: drivers/gpu/drm/drm_connector.c
:doc: Analog TV Connector Properties
Standard CRTC Properties
------------------------

4
drivers/gpu/drm/drm_atomic_uapi.c
View File

@ -700,6 +700,8 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector,
state->tv.margins.bottom = val;
} else if (property == config->legacy_tv_mode_property) {
state->tv.legacy_mode = val;
} else if (property == config->tv_mode_property) {
state->tv.mode = val;
} else if (property == config->tv_brightness_property) {
state->tv.brightness = val;
} else if (property == config->tv_contrast_property) {
@ -810,6 +812,8 @@ drm_atomic_connector_get_property(struct drm_connector *connector,
*val = state->tv.margins.bottom;
} else if (property == config->legacy_tv_mode_property) {
*val = state->tv.legacy_mode;
} else if (property == config->tv_mode_property) {
*val = state->tv.mode;
} else if (property == config->tv_brightness_property) {
*val = state->tv.brightness;
} else if (property == config->tv_contrast_property) {

122
drivers/gpu/drm/drm_connector.c
View File

@ -984,6 +984,17 @@ static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
drm_dvi_i_subconnector_enum_list)
static const struct drm_prop_enum_list drm_tv_mode_enum_list[] = {
{ DRM_MODE_TV_MODE_NTSC, "NTSC" },
{ DRM_MODE_TV_MODE_NTSC_443, "NTSC-443" },
{ DRM_MODE_TV_MODE_NTSC_J, "NTSC-J" },
{ DRM_MODE_TV_MODE_PAL, "PAL" },
{ DRM_MODE_TV_MODE_PAL_M, "PAL-M" },
{ DRM_MODE_TV_MODE_PAL_N, "PAL-N" },
{ DRM_MODE_TV_MODE_SECAM, "SECAM" },
};
DRM_ENUM_NAME_FN(drm_get_tv_mode_name, drm_tv_mode_enum_list)
static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
{ DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
{ DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
@ -1552,6 +1563,71 @@ EXPORT_SYMBOL(drm_connector_attach_dp_subconnector_property);
* infoframe values is done through drm_hdmi_avi_infoframe_content_type().
*/
/*
* TODO: Document the properties:
* - left margin
* - right margin
* - top margin
* - bottom margin
* - brightness
* - contrast
* - flicker reduction
* - hue
* - mode
* - overscan
* - saturation
* - select subconnector
* - subconnector
*/
/**
* DOC: Analog TV Connector Properties
*
* TV Mode:
* Indicates the TV Mode used on an analog TV connector. The value
* of this property can be one of the following:
*
* NTSC:
* TV Mode is CCIR System M (aka 525-lines) together with
* the NTSC Color Encoding.
*
* NTSC-443:
*
* TV Mode is CCIR System M (aka 525-lines) together with
* the NTSC Color Encoding, but with a color subcarrier
* frequency of 4.43MHz
*
* NTSC-J:
*
* TV Mode is CCIR System M (aka 525-lines) together with
* the NTSC Color Encoding, but with a black level equal to
* the blanking level.
*
* PAL:
*
* TV Mode is CCIR System B (aka 625-lines) together with
* the PAL Color Encoding.
*
* PAL-M:
*
* TV Mode is CCIR System M (aka 525-lines) together with
* the PAL Color Encoding.
*
* PAL-N:
*
* TV Mode is CCIR System N together with the PAL Color
* Encoding, a color subcarrier frequency of 3.58MHz, the
* SECAM color space, and narrower channels than other PAL
* variants.
*
* SECAM:
*
* TV Mode is CCIR System B (aka 625-lines) together with
* the SECAM Color Encoding.
*
* Drivers can set up this property by calling
* drm_mode_create_tv_properties().
*/
/**
* drm_connector_attach_content_type_property - attach content-type property
* @connector: connector to attach content type property on.
@ -1649,6 +1725,10 @@ EXPORT_SYMBOL(drm_mode_create_tv_margin_properties);
* responsible for allocating a list of format names and passing them to
* this routine.
*
* NOTE: This functions registers the deprecated "mode" connector
* property to select the analog TV mode (ie, NTSC, PAL, etc.). New
* drivers must use drm_mode_create_tv_properties() instead.
*
* Returns:
* 0 on success or a negative error code on failure.
*/
@ -1690,7 +1770,6 @@ int drm_mode_create_tv_properties_legacy(struct drm_device *dev,
if (drm_mode_create_tv_margin_properties(dev))
goto nomem;
if (num_modes) {
dev->mode_config.legacy_tv_mode_property =
drm_property_create(dev, DRM_MODE_PROP_ENUM,
@ -1739,6 +1818,47 @@ nomem:
}
EXPORT_SYMBOL(drm_mode_create_tv_properties_legacy);
/**
* drm_mode_create_tv_properties - create TV specific connector properties
* @dev: DRM device
* @supported_tv_modes: Bitmask of TV modes supported (See DRM_MODE_TV_MODE_*)
* Called by a driver's TV initialization routine, this function creates
* the TV specific connector properties for a given device.
*
* Returns:
* 0 on success or a negative error code on failure.
*/
int drm_mode_create_tv_properties(struct drm_device *dev,
unsigned int supported_tv_modes)
{
struct drm_prop_enum_list tv_mode_list[DRM_MODE_TV_MODE_MAX];
struct drm_property *tv_mode;
unsigned int i, len = 0;
if (dev->mode_config.tv_mode_property)
return 0;
for (i = 0; i < DRM_MODE_TV_MODE_MAX; i++) {
if (!(supported_tv_modes & BIT(i)))
continue;
tv_mode_list[len].type = i;
tv_mode_list[len].name = drm_get_tv_mode_name(i);
len++;
}
tv_mode = drm_property_create_enum(dev, 0, "TV mode",
tv_mode_list, len);
if (!tv_mode)
return -ENOMEM;
dev->mode_config.tv_mode_property = tv_mode;
return drm_mode_create_tv_properties_legacy(dev, 0, NULL);
}
EXPORT_SYMBOL(drm_mode_create_tv_properties);
/**
* drm_mode_create_scaling_mode_property - create scaling mode property
* @dev: DRM device

64
include/drm/drm_connector.h
View File

@ -143,6 +143,65 @@ enum subpixel_order {
};
/**
* enum drm_connector_tv_mode - Analog TV output mode
*
* This enum is used to indicate the TV output mode used on an analog TV
* connector.
*
* WARNING: The values of this enum is uABI since they're exposed in the
* "TV mode" connector property.
*/
enum drm_connector_tv_mode {
/**
* @DRM_MODE_TV_MODE_NTSC: CCIR System M (aka 525-lines)
* together with the NTSC Color Encoding.
*/
DRM_MODE_TV_MODE_NTSC,
/**
* @DRM_MODE_TV_MODE_NTSC_443: Variant of
* @DRM_MODE_TV_MODE_NTSC. Uses a color subcarrier frequency
* of 4.43 MHz.
*/
DRM_MODE_TV_MODE_NTSC_443,
/**
* @DRM_MODE_TV_MODE_NTSC_J: Variant of @DRM_MODE_TV_MODE_NTSC
* used in Japan. Uses a black level equals to the blanking
* level.
*/
DRM_MODE_TV_MODE_NTSC_J,
/**
* @DRM_MODE_TV_MODE_PAL: CCIR System B together with the PAL
* color system.
*/
DRM_MODE_TV_MODE_PAL,
/**
* @DRM_MODE_TV_MODE_PAL_M: CCIR System M (aka 525-lines)
* together with the PAL color encoding
*/
DRM_MODE_TV_MODE_PAL_M,
/**
* @DRM_MODE_TV_MODE_PAL_N: CCIR System N together with the PAL
* color encoding. It uses 625 lines, but has a color subcarrier
* frequency of 3.58MHz, the SECAM color space, and narrower
* channels compared to most of the other PAL variants.
*/
DRM_MODE_TV_MODE_PAL_N,
/**
* @DRM_MODE_TV_MODE_SECAM: CCIR System B together with the
* SECAM color system.
*/
DRM_MODE_TV_MODE_SECAM,
DRM_MODE_TV_MODE_MAX,
};
/**
* struct drm_scrambling: sink's scrambling support.
*/
@ -702,6 +761,7 @@ struct drm_connector_tv_margins {
* @subconnector: detected subconnector
* @margins: TV margins
* @legacy_mode: Legacy TV mode, driver specific value
* @mode: TV mode
* @brightness: brightness in percent
* @contrast: contrast in percent
* @flicker_reduction: flicker reduction in percent
@ -714,6 +774,7 @@ struct drm_tv_connector_state {
enum drm_mode_subconnector subconnector;
struct drm_connector_tv_margins margins;
unsigned int legacy_mode;
unsigned int mode;
unsigned int brightness;
unsigned int contrast;
unsigned int flicker_reduction;
@ -1810,6 +1871,7 @@ const char *drm_get_subpixel_order_name(enum subpixel_order order);
const char *drm_get_dpms_name(int val);
const char *drm_get_dvi_i_subconnector_name(int val);
const char *drm_get_dvi_i_select_name(int val);
const char *drm_get_tv_mode_name(int val);
const char *drm_get_tv_subconnector_name(int val);
const char *drm_get_tv_select_name(int val);
const char *drm_get_dp_subconnector_name(int val);
@ -1823,6 +1885,8 @@ int drm_mode_create_tv_margin_properties(struct drm_device *dev);
int drm_mode_create_tv_properties_legacy(struct drm_device *dev,
unsigned int num_modes,
const char * const modes[]);
int drm_mode_create_tv_properties(struct drm_device *dev,
unsigned int supported_tv_modes);
void drm_connector_attach_tv_margin_properties(struct drm_connector *conn);
int drm_mode_create_scaling_mode_property(struct drm_device *dev);
int drm_connector_attach_content_type_property(struct drm_connector *dev);

8
include/drm/drm_mode_config.h
View File

@ -716,9 +716,17 @@ struct drm_mode_config {
/**
* @legacy_tv_mode_property: Optional TV property to select
* the output TV mode.
*
* Superseded by @tv_mode_property
*/
struct drm_property *legacy_tv_mode_property;
/**
* @tv_mode_property: Optional TV property to select the TV
* standard output on the connector.
*/
struct drm_property *tv_mode_property;
/**
* @tv_left_margin_property: Optional TV property to set the left
* margin (expressed in pixels).