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drm/radeon/dpm: add helper to calculate vblank time

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Required for checking vblank time for mclk changes.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2013-07-08 11:26:42 -04:00
parent 7e1f3c0419
commit 66edc1c95d
4 changed files with 29 additions and 0 deletions
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3
drivers/gpu/drm/radeon/atombios_crtc.c
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@ -1841,6 +1841,9 @@ int atombios_crtc_mode_set(struct drm_crtc *crtc,
atombios_crtc_set_base(crtc, x, y, old_fb);
atombios_overscan_setup(crtc, mode, adjusted_mode);
atombios_scaler_setup(crtc);
/* update the hw version fpr dpm */
radeon_crtc->hw_mode = *adjusted_mode;
return 0;
}

24
drivers/gpu/drm/radeon/r600_dpm.c
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@ -150,6 +150,30 @@ void r600_dpm_print_ps_status(struct radeon_device *rdev,
printk("\n");
}
u32 r600_dpm_get_vblank_time(struct radeon_device *rdev)
{
struct drm_device *dev = rdev->ddev;
struct drm_crtc *crtc;
struct radeon_crtc *radeon_crtc;
u32 line_time_us, vblank_lines;
u32 vblank_time_us = 0xffffffff; /* if the displays are off, vblank time is max */
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
radeon_crtc = to_radeon_crtc(crtc);
if (crtc->enabled && radeon_crtc->enabled && radeon_crtc->hw_mode.clock) {
line_time_us = (radeon_crtc->hw_mode.crtc_htotal * 1000) /
radeon_crtc->hw_mode.clock;
vblank_lines = radeon_crtc->hw_mode.crtc_vblank_end -
radeon_crtc->hw_mode.crtc_vdisplay +
(radeon_crtc->v_border * 2);
vblank_time_us = vblank_lines * line_time_us;
break;
}
}
return vblank_time_us;
}
void r600_calculate_u_and_p(u32 i, u32 r_c, u32 p_b,
u32 *p, u32 *u)
{

1
drivers/gpu/drm/radeon/r600_dpm.h
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@ -129,6 +129,7 @@ void r600_dpm_print_class_info(u32 class, u32 class2);
void r600_dpm_print_cap_info(u32 caps);
void r600_dpm_print_ps_status(struct radeon_device *rdev,
struct radeon_ps *rps);
u32 r600_dpm_get_vblank_time(struct radeon_device *rdev);
bool r600_is_uvd_state(u32 class, u32 class2);
void r600_calculate_u_and_p(u32 i, u32 r_c, u32 p_b,
u32 *p, u32 *u);

1
drivers/gpu/drm/radeon/radeon_mode.h
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@ -335,6 +335,7 @@ struct radeon_crtc {
u32 line_time;
u32 wm_low;
u32 wm_high;
struct drm_display_mode hw_mode;
};
struct radeon_encoder_primary_dac {