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radeon, kdb, kms: Save and restore the LUT on atomic KMS enter/exit

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When changing VTs non-atomically the kernel works in conjunction with
the Xserver in user space and receives the LUT information from the
Xserver via a system call.  When changing modes atomically for kdb,
this information must be saved and restored without disturbing user
space as if nothing ever happened.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
CC: Jesse Barnes <jbarnes@virtuousgeek.org>
CC: David Airlie <airlied@linux.ie>
CC: dri-devel@lists.freedesktop.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jason Wessel 2010-09-26 06:47:26 -05:00 committed by Dave Airlie
parent 413d45d362
commit ff773714dd
3 changed files with 40 additions and 0 deletions
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32
drivers/gpu/drm/radeon/radeon_display.c
View File

@ -138,6 +138,38 @@ void radeon_crtc_load_lut(struct drm_crtc *crtc)
legacy_crtc_load_lut(crtc);
}
void radeon_crtc_save_lut(struct drm_crtc *crtc)
{
struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
int i;
if (!crtc->enabled)
return;
for (i = 0; i < 256; i++) {
radeon_crtc->lut_r_copy[i] = radeon_crtc->lut_r[i];
radeon_crtc->lut_g_copy[i] = radeon_crtc->lut_g[i];
radeon_crtc->lut_b_copy[i] = radeon_crtc->lut_b[i];
}
}
void radeon_crtc_restore_lut(struct drm_crtc *crtc)
{
struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
int i;
if (!crtc->enabled)
return;
for (i = 0; i < 256; i++) {
radeon_crtc->lut_r[i] = radeon_crtc->lut_r_copy[i];
radeon_crtc->lut_g[i] = radeon_crtc->lut_g_copy[i];
radeon_crtc->lut_b[i] = radeon_crtc->lut_b_copy[i];
}
radeon_crtc_load_lut(crtc);
}
/** Sets the color ramps on behalf of fbcon */
void radeon_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
u16 blue, int regno)

5
drivers/gpu/drm/radeon/radeon_legacy_crtc.c
View File

@ -355,6 +355,11 @@ int radeon_crtc_set_base_atomic(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
int x, int y, int enter)
{
if (enter)
radeon_crtc_save_lut(crtc);
else
radeon_crtc_restore_lut(crtc);
return radeon_crtc_do_set_base(crtc, fb, x, y, 1);
}

3
drivers/gpu/drm/radeon/radeon_mode.h
View File

@ -267,6 +267,7 @@ struct radeon_crtc {
struct drm_crtc base;
int crtc_id;
u16 lut_r[256], lut_g[256], lut_b[256];
u16 lut_r_copy[256], lut_g_copy[256], lut_b_copy[256];
bool enabled;
bool can_tile;
uint32_t crtc_offset;
@ -512,6 +513,8 @@ extern int atombios_get_encoder_mode(struct drm_encoder *encoder);
extern void radeon_encoder_set_active_device(struct drm_encoder *encoder);
extern void radeon_crtc_load_lut(struct drm_crtc *crtc);
extern void radeon_crtc_save_lut(struct drm_crtc *crtc);
extern void radeon_crtc_restore_lut(struct drm_crtc *crtc);
extern int atombios_crtc_set_base(struct drm_crtc *crtc, int x, int y,
struct drm_framebuffer *old_fb);
extern int atombios_crtc_set_base_atomic(struct drm_crtc *crtc,