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Commit f0aa0838 authored by Stefan Agner's avatar Stefan Agner
Browse files

drm: introduce bus_flags in drm_display_info 



Introduce bus_flags to specify display bus properties like signal
polarities. This is useful for parallel display buses, e.g. to
specify the pixel clock or data enable polarity.

Suggested-by: default avatarThierry Reding <thierry.reding@gmail.com>
Acked-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
Acked-by: default avatarManfred Schlaegl <manfred.schlaegl@gmx.at>
Acked-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: default avatarStefan Agner <stefan@agner.ch>
parent 0552f765

drivers/gpu/drm/panel/panel-simple.c

+2 −0
Original line number Diff line number Diff line
@@ -72,6 +72,7 @@ struct panel_desc { 
	} delay;



	u32 bus_format;

	u32 bus_flags;

};



struct panel_simple {
@@ -144,6 +145,7 @@ static int panel_simple_get_fixed_modes(struct panel_simple *panel) 
	if (panel->desc->bus_format)

		drm_display_info_set_bus_formats(&connector->display_info,

						 &panel->desc->bus_format, 1);

	connector->display_info.bus_flags = panel->desc->bus_flags;



	return num;

}

include/drm/drm_crtc.h

+9 −0
Original line number Diff line number Diff line
@@ -118,6 +118,14 @@ enum subpixel_order { 
#define DRM_COLOR_FORMAT_RGB444		(1<<0)

#define DRM_COLOR_FORMAT_YCRCB444	(1<<1)

#define DRM_COLOR_FORMAT_YCRCB422	(1<<2)



#define DRM_BUS_FLAG_DE_LOW		(1<<0)

#define DRM_BUS_FLAG_DE_HIGH		(1<<1)

/* drive data on pos. edge */

#define DRM_BUS_FLAG_PIXDATA_POSEDGE	(1<<2)

/* drive data on neg. edge */

#define DRM_BUS_FLAG_PIXDATA_NEGEDGE	(1<<3)



/*

 * Describes a given display (e.g. CRT or flat panel) and its limitations.

 */
@@ -139,6 +147,7 @@ struct drm_display_info { 


	const u32 *bus_formats;

	unsigned int num_bus_formats;

	u32 bus_flags;



	/* Mask of supported hdmi deep color modes */

	u8 edid_hdmi_dc_modes;