Re: [Intel-gfx] [PATCH v3 11/12] drm/edid: add more general struct edid constness in the interfaces

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Mon, Mar 28, 2022 at 05:34:32PM +0300, Jani Nikula wrote:
> With this, the remaining non-const parts are the ones that actually
> modify the EDID, for example to fix corrupt EDID.
> 
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

> ---
>  drivers/gpu/drm/drm_edid.c | 21 +++++++++++----------
>  include/drm/drm_edid.h     | 10 +++++-----
>  2 files changed, 16 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 625fa6a4a93a..d1abaa517867 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -2150,7 +2150,7 @@ static u32 edid_extract_panel_id(const struct edid *edid)
>  
>  u32 drm_edid_get_panel_id(struct i2c_adapter *adapter)
>  {
> -	struct edid *edid;
> +	const struct edid *edid;
>  	u32 panel_id;
>  
>  	edid = drm_do_get_edid_base_block(NULL, drm_do_probe_ddc_edid, adapter);
> @@ -3664,7 +3664,7 @@ static bool drm_valid_hdmi_vic(u8 vic)
>  }
>  
>  static int
> -add_alternate_cea_modes(struct drm_connector *connector, struct edid *edid)
> +add_alternate_cea_modes(struct drm_connector *connector, const struct edid *edid)
>  {
>  	struct drm_device *dev = connector->dev;
>  	struct drm_display_mode *mode, *tmp;
> @@ -4345,7 +4345,7 @@ static void drm_parse_y420cmdb_bitmap(struct drm_connector *connector,
>  }
>  
>  static int
> -add_cea_modes(struct drm_connector *connector, struct edid *edid)
> +add_cea_modes(struct drm_connector *connector, const struct edid *edid)
>  {
>  	const u8 *cea = drm_find_cea_extension(edid);
>  	const u8 *db, *hdmi = NULL, *video = NULL;
> @@ -4551,7 +4551,7 @@ static int get_monitor_name(const struct edid *edid, char name[13])
>   * @bufsize: The size of the name buffer (should be at least 14 chars.)
>   *
>   */
> -void drm_edid_get_monitor_name(struct edid *edid, char *name, int bufsize)
> +void drm_edid_get_monitor_name(const struct edid *edid, char *name, int bufsize)
>  {
>  	int name_length;
>  	char buf[13];
> @@ -4585,7 +4585,8 @@ static void clear_eld(struct drm_connector *connector)
>   * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver. The
>   * HDCP and Port_ID ELD fields are left for the graphics driver to fill in.
>   */
> -static void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
> +static void drm_edid_to_eld(struct drm_connector *connector,
> +			    const struct edid *edid)
>  {
>  	uint8_t *eld = connector->eld;
>  	const u8 *cea;
> @@ -4681,7 +4682,7 @@ static void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
>   *
>   * Return: The number of found SADs or negative number on error.
>   */
> -int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads)
> +int drm_edid_to_sad(const struct edid *edid, struct cea_sad **sads)
>  {
>  	int count = 0;
>  	int i, start, end, dbl;
> @@ -4743,7 +4744,7 @@ EXPORT_SYMBOL(drm_edid_to_sad);
>   * Return: The number of found Speaker Allocation Blocks or negative number on
>   * error.
>   */
> -int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb)
> +int drm_edid_to_speaker_allocation(const struct edid *edid, u8 **sadb)
>  {
>  	int count = 0;
>  	int i, start, end, dbl;
> @@ -4838,7 +4839,7 @@ EXPORT_SYMBOL(drm_av_sync_delay);
>   *
>   * Return: True if the monitor is HDMI, false if not or unknown.
>   */
> -bool drm_detect_hdmi_monitor(struct edid *edid)
> +bool drm_detect_hdmi_monitor(const struct edid *edid)
>  {
>  	const u8 *edid_ext;
>  	int i;
> @@ -4876,7 +4877,7 @@ EXPORT_SYMBOL(drm_detect_hdmi_monitor);
>   *
>   * Return: True if the monitor supports audio, false otherwise.
>   */
> -bool drm_detect_monitor_audio(struct edid *edid)
> +bool drm_detect_monitor_audio(const struct edid *edid)
>  {
>  	const u8 *edid_ext;
>  	int i, j;
> @@ -5543,7 +5544,7 @@ static int add_displayid_detailed_1_modes(struct drm_connector *connector,
>  }
>  
>  static int add_displayid_detailed_modes(struct drm_connector *connector,
> -					struct edid *edid)
> +					const struct edid *edid)
>  {
>  	const struct displayid_block *block;
>  	struct displayid_iter iter;
> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> index 144c495b99c4..48b1bf9c315a 100644
> --- a/include/drm/drm_edid.h
> +++ b/include/drm/drm_edid.h
> @@ -372,8 +372,8 @@ struct drm_connector;
>  struct drm_connector_state;
>  struct drm_display_mode;
>  
> -int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads);
> -int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb);
> +int drm_edid_to_sad(const struct edid *edid, struct cea_sad **sads);
> +int drm_edid_to_speaker_allocation(const struct edid *edid, u8 **sadb);
>  int drm_av_sync_delay(struct drm_connector *connector,
>  		      const struct drm_display_mode *mode);
>  
> @@ -569,8 +569,8 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
>  int drm_add_override_edid_modes(struct drm_connector *connector);
>  
>  u8 drm_match_cea_mode(const struct drm_display_mode *to_match);
> -bool drm_detect_hdmi_monitor(struct edid *edid);
> -bool drm_detect_monitor_audio(struct edid *edid);
> +bool drm_detect_hdmi_monitor(const struct edid *edid);
> +bool drm_detect_monitor_audio(const struct edid *edid);
>  enum hdmi_quantization_range
>  drm_default_rgb_quant_range(const struct drm_display_mode *mode);
>  int drm_add_modes_noedid(struct drm_connector *connector,
> @@ -582,7 +582,7 @@ int drm_edid_header_is_valid(const u8 *raw_edid);
>  bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
>  			  bool *edid_corrupt);
>  bool drm_edid_is_valid(struct edid *edid);
> -void drm_edid_get_monitor_name(struct edid *edid, char *name,
> +void drm_edid_get_monitor_name(const struct edid *edid, char *name,
>  			       int buflen);
>  struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
>  					   int hsize, int vsize, int fresh,
> -- 
> 2.30.2

-- 
Ville Syrjälä
Intel