- /* Need htotal for all active display plane */
- list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
- struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
- if (intel_crtc->dpms_mode == DRM_MODE_DPMS_ON) {
- if (intel_crtc->plane == 0)
- planea_htotal = crtc->mode.htotal;
- else
- planeb_htotal = crtc->mode.htotal;
- }
- }
-
- /* Calculate and update the watermark for plane A */
- if (planea_clock) {
- entries_required = ((planea_clock / 1000) * pixel_size *
- ILK_LP0_PLANE_LATENCY) / 1000;
- entries_required = DIV_ROUND_UP(entries_required,
- ironlake_display_wm_info.cacheline_size);
- planea_wm = entries_required +
- ironlake_display_wm_info.guard_size;
-
- if (planea_wm > (int)ironlake_display_wm_info.max_wm)
- planea_wm = ironlake_display_wm_info.max_wm;
-
- /* Use the large buffer method to calculate cursor watermark */
- line_time_us = (planea_htotal * 1000) / planea_clock;
-
- /* Use ns/us then divide to preserve precision */
- line_count = (ILK_LP0_CURSOR_LATENCY / line_time_us + 1000) / 1000;
-
- /* calculate the cursor watermark for cursor A */
- entries_required = line_count * 64 * pixel_size;
- entries_required = DIV_ROUND_UP(entries_required,
- ironlake_cursor_wm_info.cacheline_size);
- cursora_wm = entries_required + ironlake_cursor_wm_info.guard_size;
- if (cursora_wm > ironlake_cursor_wm_info.max_wm)
- cursora_wm = ironlake_cursor_wm_info.max_wm;
-
- reg_value = I915_READ(WM0_PIPEA_ILK);
- reg_value &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK);
- reg_value |= (planea_wm << WM0_PIPE_PLANE_SHIFT) |
- (cursora_wm & WM0_PIPE_CURSOR_MASK);
- I915_WRITE(WM0_PIPEA_ILK, reg_value);
- DRM_DEBUG_KMS("FIFO watermarks For pipe A - plane %d, "
- "cursor: %d\n", planea_wm, cursora_wm);
- }
- /* Calculate and update the watermark for plane B */
- if (planeb_clock) {
- entries_required = ((planeb_clock / 1000) * pixel_size *
- ILK_LP0_PLANE_LATENCY) / 1000;
- entries_required = DIV_ROUND_UP(entries_required,
- ironlake_display_wm_info.cacheline_size);
- planeb_wm = entries_required +
- ironlake_display_wm_info.guard_size;
-
- if (planeb_wm > (int)ironlake_display_wm_info.max_wm)
- planeb_wm = ironlake_display_wm_info.max_wm;