Color lookup support for the atmel-hlcdc driver

[Peter Rosin]

On 2017-06-16 01:03, Peter Rosin wrote:
> On 2017-06-16 01:01, Peter Rosin wrote:
>> So, is this below better? I'll follow-up with a patch I need for the
>> fbdev emulation to work.
> 
> Without adding gamma callbacks in drm_fb_helper_funcs I hit
> 
> 	/*
> 	 * The driver really shouldn't advertise pseudo/directcolor
> 	 * visuals if it can't deal with the palette.
> 	 */
> 	if (WARN_ON(!fb_helper->funcs->gamma_set ||
> 		    !fb_helper->funcs->gamma_get))
> 		return -EINVAL;
> 
> in drm_fb_helper.c:setcolreg(), so I need this patch which basically
> exposes some guts from fbdev_cma and glues it with the new clut
> handling in the atmel_hlcdc driver.
> 
> Cheers,
> peda
> +
> +/**
> + * drm_fbdev_cma_init_with_funcs() - Allocate and initializes a drm_fbdev_cma struct
> + * @dev: DRM device
> + * @preferred_bpp: Preferred bits per pixel for the device
> + * @max_conn_count: Maximum number of connectors
> + * @framebuffer_funcs: framebuffer functions, in particular a custom dirty() callback
> + *
> + * Returns a newly allocated drm_fbdev_cma struct or a ERR_PTR.
> + */
> +struct drm_fbdev_cma *drm_fbdev_cma_init_with_funcs(struct drm_device *dev,
> +	unsigned int preferred_bpp, unsigned int max_conn_count,
> +	const struct drm_framebuffer_funcs *framebuffer_funcs)
> +{
> +	return drm_fbdev_cma_init_with_funcs2(dev, preferred_bpp,
> +					      max_conn_count,
> +					      funcs, NULL);

s/funcs/framebuffer_funcs/

Sorry about that. I'm planning to resend this as a series anyway with proper
commit messages and signoffs etc.

Cheers,
peda

> +}
>  EXPORT_SYMBOL_GPL(drm_fbdev_cma_init_with_funcs);