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Commit c850cb78 authored by Dave Airlie's avatar Dave Airlie
Browse files

drm/kms: fix kms/fbdev colormap support properly. 



This sets the fbcon to use TRUECOLOR by default, it then
only modifies the pseudo palette for fbcon, and only touches
the real palette when in 8-bit pseudo color mode.

Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent d0c403e9

drivers/gpu/drm/drm_fb_helper.c

+29 −13
Original line number Diff line number Diff line
@@ -454,22 +454,39 @@ int drm_fb_helper_init_crtc_count(struct drm_fb_helper *helper, int crtc_count, 
}

EXPORT_SYMBOL(drm_fb_helper_init_crtc_count);



static void setcolreg(struct drm_crtc *crtc, u16 red, u16 green,

static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,

		     u16 blue, u16 regno, struct fb_info *info)

{

	struct drm_fb_helper *fb_helper = info->par;

	struct drm_framebuffer *fb = fb_helper->fb;

	int pindex;



	if (info->fix.visual == FB_VISUAL_TRUECOLOR) {

		u32 *palette;

		u32 value;

		/* place color in psuedopalette */

		if (regno > 16)

			return -EINVAL;

		palette = (u32 *)info->pseudo_palette;

		red >>= (16 - info->var.red.length);

		green >>= (16 - info->var.green.length);

		blue >>= (16 - info->var.blue.length);

		value = (red << info->var.red.offset) |

			(green << info->var.green.offset) |

			(blue << info->var.blue.offset);

		palette[regno] = value;

		return 0;

	}



	pindex = regno;



	if (fb->bits_per_pixel == 16) {

		pindex = regno << 3;



		if (fb->depth == 16 && regno > 63)

			return;

			return -EINVAL;

		if (fb->depth == 15 && regno > 31)

			return;

			return -EINVAL;



		if (fb->depth == 16) {

			u16 r, g, b;
@@ -493,13 +510,7 @@ static void setcolreg(struct drm_crtc *crtc, u16 red, u16 green, 


	if (fb->depth != 16)

		fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);



	if (regno < 16 && info->fix.visual == FB_VISUAL_DIRECTCOLOR) {

		((u32 *) fb->pseudo_palette)[regno] =

			(regno << info->var.red.offset) |

			(regno << info->var.green.offset) |

			(regno << info->var.blue.offset);

	}

	return 0;

}



int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
@@ -536,7 +547,9 @@ int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) 
			if (transp)

				htransp = *transp++;



			setcolreg(crtc, hred, hgreen, hblue, start++, info);

			rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);

			if (rc)

				return rc;

		}

		crtc_funcs->load_lut(crtc);

	}
@@ -555,6 +568,7 @@ int drm_fb_helper_setcolreg(unsigned regno, 
	struct drm_device *dev = fb_helper->dev;

	struct drm_crtc *crtc;

	int i;

	int ret;



	if (regno > 255)

		return 1;
@@ -568,8 +582,10 @@ int drm_fb_helper_setcolreg(unsigned regno, 
		if (i == fb_helper->crtc_count)

			continue;



		ret = setcolreg(crtc, red, green, blue, regno, info);

		if (ret)

			return ret;



		setcolreg(crtc, red, green, blue, regno, info);

		crtc_funcs->load_lut(crtc);

	}

	return 0;
@@ -928,7 +944,7 @@ void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, 
{

	info->fix.type = FB_TYPE_PACKED_PIXELS;

	info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :

		FB_VISUAL_DIRECTCOLOR;

		FB_VISUAL_TRUECOLOR;

	info->fix.type_aux = 0;

	info->fix.xpanstep = 1; /* doing it in hw */

	info->fix.ypanstep = 1; /* doing it in hw */