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drm/ast: Add CRTC helpers for atomic modesetting

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As the CRTC code has already been prepared for a split between mode
setting and plane handling, most of the CRTC's atomic modesetting is
build upon primitives of the non-atomic implementation.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191107083404.6852-8-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2019-11-07 09:34:02 +01:00
parent a6ff807b71
commit b48e1b6ffd
1 changed files with 104 additions and 1 deletions
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105
drivers/gpu/drm/ast/ast_mode.c
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@ -727,6 +727,103 @@ static void ast_crtc_commit(struct drm_crtc *crtc)
ast_crtc_load_lut(crtc);
}
static int ast_crtc_helper_atomic_check(struct drm_crtc *crtc,
struct drm_crtc_state *state)
{
struct ast_private *ast = crtc->dev->dev_private;
struct drm_plane_state *plane_state;
bool succ;
struct drm_display_mode adjusted_mode;
struct ast_vbios_mode_info vbios_mode;
if (ast->chip == AST1180) {
DRM_ERROR("AST 1180 modesetting not supported\n");
return -EINVAL;
}
plane_state = crtc->primary->state;
if (plane_state && plane_state->fb) {
succ = ast_get_vbios_mode_info(plane_state->fb, &state->mode,
&adjusted_mode, &vbios_mode);
if (!succ)
return -EINVAL;
}
return 0;
}
static void ast_crtc_helper_atomic_begin(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
struct ast_private *ast = crtc->dev->dev_private;
ast_open_key(ast);
}
static void ast_crtc_helper_atomic_flush(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
const struct drm_framebuffer *fb = crtc->primary->state->fb;
struct drm_display_mode adjusted_mode;
struct ast_vbios_mode_info vbios_mode;
bool succ;
crtc->state->no_vblank = true;
if (!fb)
return;
ast_set_color_reg(crtc, fb);
memset(&adjusted_mode, 0, sizeof(adjusted_mode));
drm_mode_copy(&adjusted_mode, &crtc->state->adjusted_mode);
succ = ast_get_vbios_mode_info(fb, &crtc->state->adjusted_mode,
&adjusted_mode, &vbios_mode);
if (WARN_ON_ONCE(!succ))
return;
ast_set_vbios_color_reg(crtc, fb, &vbios_mode);
}
static void
ast_crtc_helper_atomic_enable(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
struct drm_device *dev = crtc->dev;
struct ast_private *ast = crtc->dev->dev_private;
const struct drm_framebuffer *fb = crtc->primary->state->fb;
struct drm_display_mode adjusted_mode;
struct ast_vbios_mode_info vbios_mode;
bool succ;
memset(&adjusted_mode, 0, sizeof(adjusted_mode));
drm_mode_copy(&adjusted_mode, &crtc->state->adjusted_mode);
succ = ast_get_vbios_mode_info(fb, &crtc->state->adjusted_mode,
&adjusted_mode, &vbios_mode);
if (WARN_ON_ONCE(!succ))
return;
ast_set_vbios_mode_reg(crtc, &adjusted_mode, &vbios_mode);
ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x06);
ast_set_std_reg(crtc, &adjusted_mode, &vbios_mode);
ast_set_crtc_reg(crtc, &adjusted_mode, &vbios_mode);
ast_set_dclk_reg(dev, &adjusted_mode, &vbios_mode);
ast_set_crtthd_reg(crtc);
ast_set_sync_reg(dev, &adjusted_mode, &vbios_mode);
ast_set_dac_reg(crtc, &adjusted_mode, &vbios_mode);
ast_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
}
static void
ast_crtc_helper_atomic_disable(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
ast_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
}
static const struct drm_crtc_helper_funcs ast_crtc_helper_funcs = {
.dpms = ast_crtc_dpms,
@ -735,7 +832,11 @@ static const struct drm_crtc_helper_funcs ast_crtc_helper_funcs = {
.disable = ast_crtc_disable,
.prepare = ast_crtc_prepare,
.commit = ast_crtc_commit,
.atomic_check = ast_crtc_helper_atomic_check,
.atomic_begin = ast_crtc_helper_atomic_begin,
.atomic_flush = ast_crtc_helper_atomic_flush,
.atomic_enable = ast_crtc_helper_atomic_enable,
.atomic_disable = ast_crtc_helper_atomic_disable,
};
static void ast_crtc_reset(struct drm_crtc *crtc)
@ -766,6 +867,8 @@ static const struct drm_crtc_funcs ast_crtc_funcs = {
.set_config = drm_crtc_helper_set_config,
.gamma_set = ast_crtc_gamma_set,
.destroy = ast_crtc_destroy,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
};
static int ast_crtc_init(struct drm_device *dev)