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VC4: Add a module parameter for the screen resolution #1

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VC4: Add a module parameter for the screen resolution #1

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14 changes: 13 additions & 1 deletion drivers/gpu/drm/vc4/vc4_display.c
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Original file line number Diff line number Diff line change
Expand Up @@ -81,6 +81,11 @@ vc4_connector_best_encoder(struct drm_connector *connector)
return vc4_attached_encoder(connector);
}

static struct vc4_params params = {
.width = 1680,
.height = 1050
};

static int
vc4_connector_get_modes(struct drm_connector *connector)
{
Expand All @@ -90,7 +95,8 @@ vc4_connector_get_modes(struct drm_connector *connector)
/* XXX This is the resolution that the firmware is
* detecting for the monitor on my desk.
*/
mode = drm_gtf_mode(dev, 1680, 1050, 60, false, false);
mode = drm_gtf_mode(dev, params.width, params.height, 60, false, false);
DRM_INFO("Using resolution %dx%d@60\n", params.width, params.height);

mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;

Expand Down Expand Up @@ -417,3 +423,9 @@ vc4_modeset_init(struct drm_device *dev)
return 0;
}


module_param_named(width, params.width, int, 0444);
MODULE_PARM_DESC(width, "Display width (default 1680)");

module_param_named(height, params.height, int, 0444);
MODULE_PARM_DESC(height, "Display height (default 1050)");
5 changes: 5 additions & 0 deletions drivers/gpu/drm/vc4/vc4_display.h
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Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,11 @@ struct vc4_crtc {
struct drm_crtc base;
};

struct vc4_params {
int width;
int height;
};

#define to_vc4_crtc(x) container_of(x, struct vc4_crtc, base)
#define to_vc4_connector(x) container_of(x, struct vc4_connector, base)
#define to_vc4_encoder(x) container_of(x, struct vc4_encoder, base)
Expand Down