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drm/modes: Add initializer macro DRM_MODE_INIT()

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The macro DRM_MODE_INIT() initializes an instance of
struct drm_display_mode with typical parameters. Convert simpledrm
and also update the macro DRM_SIMPLE_MODE().

v3:
	* fix DRM_MODE_INIT() docs (kernel test robot)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220905141648.22013-4-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2022-09-05 16:16:47 +02:00
parent 216b9bbaea
commit 385d1bba89
2 changed files with 39 additions and 19 deletions
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23
drivers/gpu/drm/tiny/simpledrm.c
View File

@ -30,16 +30,6 @@
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 0
/*
* Assume a monitor resolution of 96 dpi to
* get a somewhat reasonable screen size.
*/
#define RES_MM(d) \
(((d) * 254ul) / (96ul * 10ul))
#define SIMPLEDRM_MODE(hd, vd) \
DRM_SIMPLE_MODE(hd, vd, RES_MM(hd), RES_MM(vd))
/*
* Helpers for simplefb
*/
@ -641,10 +631,15 @@ static const struct drm_mode_config_funcs simpledrm_mode_config_funcs = {
static struct drm_display_mode simpledrm_mode(unsigned int width,
unsigned int height)
{
struct drm_display_mode mode = { SIMPLEDRM_MODE(width, height) };
mode.clock = mode.hdisplay * mode.vdisplay * 60 / 1000 /* kHz */;
drm_mode_set_name(&mode);
/*
* Assume a monitor resolution of 96 dpi to
* get a somewhat reasonable screen size.
*/
const struct drm_display_mode mode = {
DRM_MODE_INIT(60, width, height,
DRM_MODE_RES_MM(width, 96ul),
DRM_MODE_RES_MM(height, 96ul))
};
return mode;
}

35
include/drm/drm_modes.h
View File

@ -138,6 +138,35 @@ enum drm_mode_status {
.vsync_start = (vss), .vsync_end = (vse), .vtotal = (vt), \
.vscan = (vs), .flags = (f)
/**
* DRM_MODE_RES_MM - Calculates the display size from resolution and DPI
* @res: The resolution in pixel
* @dpi: The number of dots per inch
*/
#define DRM_MODE_RES_MM(res, dpi) \
(((res) * 254ul) / ((dpi) * 10ul))
#define __DRM_MODE_INIT(pix, hd, vd, hd_mm, vd_mm) \
.type = DRM_MODE_TYPE_DRIVER, .clock = (pix), \
.hdisplay = (hd), .hsync_start = (hd), .hsync_end = (hd), \
.htotal = (hd), .vdisplay = (vd), .vsync_start = (vd), \
.vsync_end = (vd), .vtotal = (vd), .width_mm = (hd_mm), \
.height_mm = (vd_mm)
/**
* DRM_MODE_INIT - Initialize display mode
* @hz: Vertical refresh rate in Hertz
* @hd: Horizontal resolution, width
* @vd: Vertical resolution, height
* @hd_mm: Display width in millimeters
* @vd_mm: Display height in millimeters
*
* This macro initializes a &drm_display_mode that contains information about
* refresh rate, resolution and physical size.
*/
#define DRM_MODE_INIT(hz, hd, vd, hd_mm, vd_mm) \
__DRM_MODE_INIT((hd) * (vd) * (hz) / 1000 /* kHz */, hd, vd, hd_mm, vd_mm)
/**
* DRM_SIMPLE_MODE - Simple display mode
* @hd: Horizontal resolution, width
@ -149,11 +178,7 @@ enum drm_mode_status {
* resolution and physical size.
*/
#define DRM_SIMPLE_MODE(hd, vd, hd_mm, vd_mm) \
.type = DRM_MODE_TYPE_DRIVER, .clock = 1 /* pass validation */, \
.hdisplay = (hd), .hsync_start = (hd), .hsync_end = (hd), \
.htotal = (hd), .vdisplay = (vd), .vsync_start = (vd), \
.vsync_end = (vd), .vtotal = (vd), .width_mm = (hd_mm), \
.height_mm = (vd_mm)
__DRM_MODE_INIT(1 /* pass validation */, hd, vd, hd_mm, vd_mm)
#define CRTC_INTERLACE_HALVE_V (1 << 0) /* halve V values for interlacing */
#define CRTC_STEREO_DOUBLE (1 << 1) /* adjust timings for stereo modes */