[PATCH 4/4] drm: Constify the pretty-print functions
Laurent Pinchart
laurent.pinchart at ideasonboard.com
Tue Jun 18 17:53:24 PDT 2013
Hi Ville,
On Friday 07 June 2013 18:43:07 ville.syrjala at linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> The structures and strings involved with various pretty-print functions
> aren't meant to be modified, so make them all const. The exception is
> drm_connector_enum_list which does get modified in drm_connector_init().
>
> While at it move the drm_get_connector_status_name() prototype from
> drmP.h to drm_crtc.h where it belongs.
This breaks compilation on drm-next:
drivers/gpu/drm/drm_fb_helper.c: In function
‘drm_fb_helper_parse_command_line’:
drivers/gpu/drm/drm_fb_helper.c:127:3: warning: passing argument 1 of
‘fb_get_options’ discards ‘const’ qualifier from pointer target type [enabled
by default]
In file included from drivers/gpu/drm/drm_fb_helper.c:35:0:
include/linux/fb.h:627:12: note: expected ‘char *’ but argument is of type
‘const char
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
> drivers/gpu/drm/drm_crtc.c | 30 +++++++++++++++---------------
> include/drm/drmP.h | 1 -
> include/drm/drm_crtc.h | 17 +++++++++--------
> 3 files changed, 24 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index 079996a..44c3421 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -92,7 +92,7 @@ EXPORT_SYMBOL(drm_warn_on_modeset_not_all_locked);
>
> /* Avoid boilerplate. I'm tired of typing. */
> #define DRM_ENUM_NAME_FN(fnname, list) \
> - char *fnname(int val) \
> + const char *fnname(int val) \
> { \
> int i; \
> for (i = 0; i < ARRAY_SIZE(list); i++) { \
> @@ -105,7 +105,7 @@ EXPORT_SYMBOL(drm_warn_on_modeset_not_all_locked);
> /*
> * Global properties
> */
> -static struct drm_prop_enum_list drm_dpms_enum_list[] =
> +static const struct drm_prop_enum_list drm_dpms_enum_list[] =
> { { DRM_MODE_DPMS_ON, "On" },
> { DRM_MODE_DPMS_STANDBY, "Standby" },
> { DRM_MODE_DPMS_SUSPEND, "Suspend" },
> @@ -117,7 +117,7 @@ DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
> /*
> * Optional properties
> */
> -static struct drm_prop_enum_list drm_scaling_mode_enum_list[] =
> +static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] =
> {
> { DRM_MODE_SCALE_NONE, "None" },
> { DRM_MODE_SCALE_FULLSCREEN, "Full" },
> @@ -125,7 +125,7 @@ static struct drm_prop_enum_list
> drm_scaling_mode_enum_list[] = { DRM_MODE_SCALE_ASPECT, "Full aspect" },
> };
>
> -static struct drm_prop_enum_list drm_dithering_mode_enum_list[] =
> +static const struct drm_prop_enum_list drm_dithering_mode_enum_list[] =
> {
> { DRM_MODE_DITHERING_OFF, "Off" },
> { DRM_MODE_DITHERING_ON, "On" },
> @@ -135,7 +135,7 @@ static struct drm_prop_enum_list
> drm_dithering_mode_enum_list[] = /*
> * Non-global properties, but "required" for certain connectors.
> */
> -static struct drm_prop_enum_list drm_dvi_i_select_enum_list[] =
> +static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] =
> {
> { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
> { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
> @@ -144,7 +144,7 @@ static struct drm_prop_enum_list
> drm_dvi_i_select_enum_list[] =
>
> DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
>
> -static struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] =
> +static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] =
> {
> { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
> { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
> @@ -154,7 +154,7 @@ static 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 struct drm_prop_enum_list drm_tv_select_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 */
> @@ -165,7 +165,7 @@ static struct drm_prop_enum_list
> drm_tv_select_enum_list[] =
>
> DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
>
> -static struct drm_prop_enum_list drm_tv_subconnector_enum_list[] =
> +static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] =
> {
> { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
> { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
> @@ -177,7 +177,7 @@ static struct drm_prop_enum_list
> drm_tv_subconnector_enum_list[] =
> DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
> drm_tv_subconnector_enum_list)
>
> -static struct drm_prop_enum_list drm_dirty_info_enum_list[] = {
> +static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = {
> { DRM_MODE_DIRTY_OFF, "Off" },
> { DRM_MODE_DIRTY_ON, "On" },
> { DRM_MODE_DIRTY_ANNOTATE, "Annotate" },
> @@ -185,7 +185,7 @@ static struct drm_prop_enum_list
> drm_dirty_info_enum_list[] = {
>
> struct drm_conn_prop_enum_list {
> int type;
> - char *name;
> + const char *name;
> int count;
> };
>
> @@ -211,7 +211,7 @@ static struct drm_conn_prop_enum_list
> drm_connector_enum_list[] = { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual", 0},
> };
>
> -static struct drm_prop_enum_list drm_encoder_enum_list[] =
> +static const struct drm_prop_enum_list drm_encoder_enum_list[] =
> { { DRM_MODE_ENCODER_NONE, "None" },
> { DRM_MODE_ENCODER_DAC, "DAC" },
> { DRM_MODE_ENCODER_TMDS, "TMDS" },
> @@ -220,7 +220,7 @@ static struct drm_prop_enum_list drm_encoder_enum_list[]
> = { DRM_MODE_ENCODER_VIRTUAL, "Virtual" },
> };
>
> -char *drm_get_encoder_name(struct drm_encoder *encoder)
> +const char *drm_get_encoder_name(const struct drm_encoder *encoder)
> {
> static char buf[32];
>
> @@ -231,7 +231,7 @@ char *drm_get_encoder_name(struct drm_encoder *encoder)
> }
> EXPORT_SYMBOL(drm_get_encoder_name);
>
> -char *drm_get_connector_name(struct drm_connector *connector)
> +const char *drm_get_connector_name(const struct drm_connector *connector)
> {
> static char buf[32];
>
> @@ -242,7 +242,7 @@ char *drm_get_connector_name(struct drm_connector
> *connector) }
> EXPORT_SYMBOL(drm_get_connector_name);
>
> -char *drm_get_connector_status_name(enum drm_connector_status status)
> +const char *drm_get_connector_status_name(enum drm_connector_status status)
> {
> if (status == connector_status_connected)
> return "connected";
> @@ -258,7 +258,7 @@ static char printable_char(int c)
> return isascii(c) && isprint(c) ? c : '?';
> }
>
> -char *drm_get_format_name(uint32_t format)
> +const char *drm_get_format_name(uint32_t format)
> {
> static char buf[32];
>
> diff --git a/include/drm/drmP.h b/include/drm/drmP.h
> index b06f5af..e931a65 100644
> --- a/include/drm/drmP.h
> +++ b/include/drm/drmP.h
> @@ -1598,7 +1598,6 @@ extern void drm_sysfs_destroy(void);
> extern int drm_sysfs_device_add(struct drm_minor *minor);
> extern void drm_sysfs_hotplug_event(struct drm_device *dev);
> extern void drm_sysfs_device_remove(struct drm_minor *minor);
> -extern char *drm_get_connector_status_name(enum drm_connector_status
> status); extern int drm_sysfs_connector_add(struct drm_connector
> *connector); extern void drm_sysfs_connector_remove(struct drm_connector
> *connector);
>
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index 2cbbfd4..53c33e2 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -897,12 +897,13 @@ extern void drm_plane_cleanup(struct drm_plane
> *plane);
>
> extern void drm_encoder_cleanup(struct drm_encoder *encoder);
>
> -extern char *drm_get_connector_name(struct drm_connector *connector);
> -extern char *drm_get_dpms_name(int val);
> -extern char *drm_get_dvi_i_subconnector_name(int val);
> -extern char *drm_get_dvi_i_select_name(int val);
> -extern char *drm_get_tv_subconnector_name(int val);
> -extern char *drm_get_tv_select_name(int val);
> +extern const char *drm_get_connector_name(const struct drm_connector
> *connector); +extern const char *drm_get_connector_status_name(enum
> drm_connector_status status); +extern const char *drm_get_dpms_name(int
> val);
> +extern const char *drm_get_dvi_i_subconnector_name(int val);
> +extern const char *drm_get_dvi_i_select_name(int val);
> +extern const char *drm_get_tv_subconnector_name(int val);
> +extern const char *drm_get_tv_select_name(int val);
> extern void drm_fb_release(struct drm_file *file_priv);
> extern int drm_mode_group_init_legacy_group(struct drm_device *dev, struct
> drm_mode_group *group); extern bool drm_probe_ddc(struct i2c_adapter
> *adapter);
> @@ -994,7 +995,7 @@ extern int drm_mode_create_tv_properties(struct
> drm_device *dev, int num_formats extern int
> drm_mode_create_scaling_mode_property(struct drm_device *dev); extern int
> drm_mode_create_dithering_property(struct drm_device *dev); extern int
> drm_mode_create_dirty_info_property(struct drm_device *dev); -extern char
> *drm_get_encoder_name(struct drm_encoder *encoder);
> +extern const char *drm_get_encoder_name(const struct drm_encoder *encoder);
>
> extern int drm_mode_connector_attach_encoder(struct drm_connector
> *connector, struct drm_encoder *encoder);
> @@ -1094,6 +1095,6 @@ extern int drm_format_num_planes(uint32_t format);
> extern int drm_format_plane_cpp(uint32_t format, int plane);
> extern int drm_format_horz_chroma_subsampling(uint32_t format);
> extern int drm_format_vert_chroma_subsampling(uint32_t format);
> -extern char *drm_get_format_name(uint32_t format);
> +extern const char *drm_get_format_name(uint32_t format);
>
> #endif /* __DRM_CRTC_H__ */
--
Regards,
Laurent Pinchart
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