diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/tiny/simpledrm.c | 31 |
1 files changed, 22 insertions, 9 deletions
diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c index 63881a3754f8..c38d85848af8 100644 --- a/drivers/gpu/drm/tiny/simpledrm.c +++ b/drivers/gpu/drm/tiny/simpledrm.c @@ -606,16 +606,12 @@ static const struct drm_mode_config_funcs simpledrm_mode_config_funcs = { */ static struct drm_display_mode simpledrm_mode(unsigned int width, - unsigned int height) + unsigned int height, + unsigned int width_mm, + unsigned int height_mm) { - /* - * 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)) + DRM_MODE_INIT(60, width, height, width_mm, height_mm) }; return mode; @@ -629,6 +625,8 @@ static struct simpledrm_device *simpledrm_device_create(struct drm_driver *drv, struct simpledrm_device *sdev; struct drm_device *dev; int width, height, stride; + int width_mm = 0, height_mm = 0; + struct device_node *panel_node; const struct drm_format_info *format; struct resource *res, *mem = NULL; struct drm_plane *primary_plane; @@ -685,6 +683,12 @@ static struct simpledrm_device *simpledrm_device_create(struct drm_driver *drv, mem = simplefb_get_memory_of(dev, of_node); if (IS_ERR(mem)) return ERR_CAST(mem); + panel_node = of_parse_phandle(of_node, "panel", 0); + if (panel_node) { + simplefb_read_u32_of(dev, panel_node, "width-mm", &width_mm); + simplefb_read_u32_of(dev, panel_node, "height-mm", &height_mm); + of_node_put(panel_node); + } } else { drm_err(dev, "no simplefb configuration found\n"); return ERR_PTR(-ENODEV); @@ -695,7 +699,16 @@ static struct simpledrm_device *simpledrm_device_create(struct drm_driver *drv, return ERR_PTR(-EINVAL); } - sdev->mode = simpledrm_mode(width, height); + /* + * Assume a monitor resolution of 96 dpi if physical dimensions + * are not specified to get a somewhat reasonable screen size. + */ + if (!width_mm) + width_mm = DRM_MODE_RES_MM(width, 96ul); + if (!height_mm) + height_mm = DRM_MODE_RES_MM(height, 96ul); + + sdev->mode = simpledrm_mode(width, height, width_mm, height_mm); sdev->format = format; sdev->pitch = stride; |