}
}
+/* watermark setup */
+
+static u32 evergreen_line_buffer_adjust(struct radeon_device *rdev,
+ struct radeon_crtc *radeon_crtc,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *other_mode)
+{
+ u32 tmp = 0;
+ /*
+ * Line Buffer Setup
+ * There are 3 line buffers, each one shared by 2 display controllers.
+ * DC_LB_MEMORY_SPLIT controls how that line buffer is shared between
+ * the display controllers. The paritioning is done via one of four
+ * preset allocations specified in bits 2:0:
+ * first display controller
+ * 0 - first half of lb (3840 * 2)
+ * 1 - first 3/4 of lb (5760 * 2)
+ * 2 - whole lb (7680 * 2)
+ * 3 - first 1/4 of lb (1920 * 2)
+ * second display controller
+ * 4 - second half of lb (3840 * 2)
+ * 5 - second 3/4 of lb (5760 * 2)
+ * 6 - whole lb (7680 * 2)
+ * 7 - last 1/4 of lb (1920 * 2)
+ */
+ if (mode && other_mode) {
+ if (mode->hdisplay > other_mode->hdisplay) {
+ if (mode->hdisplay > 2560)
+ tmp = 1; /* 3/4 */
+ else
+ tmp = 0; /* 1/2 */
+ } else if (other_mode->hdisplay > mode->hdisplay) {
+ if (other_mode->hdisplay > 2560)
+ tmp = 3; /* 1/4 */
+ else
+ tmp = 0; /* 1/2 */
+ } else
+ tmp = 0; /* 1/2 */
+ } else if (mode)
+ tmp = 2; /* whole */
+ else if (other_mode)
+ tmp = 3; /* 1/4 */
+
+ /* second controller of the pair uses second half of the lb */
+ if (radeon_crtc->crtc_id % 2)
+ tmp += 4;
+ WREG32(DC_LB_MEMORY_SPLIT + radeon_crtc->crtc_offset, tmp);
+
+ switch (tmp) {
+ case 0:
+ case 4:
+ default:
+ return 3840 * 2;
+ case 1:
+ case 5:
+ return 5760 * 2;
+ case 2:
+ case 6:
+ return 7680 * 2;
+ case 3:
+ case 7:
+ return 1920 * 2;
+ }
+}
+
+static u32 evergreen_get_number_of_dram_channels(struct radeon_device *rdev)
+{
+ u32 tmp = RREG32(MC_SHARED_CHMAP);
+
+ switch ((tmp & NOOFCHAN_MASK) >> NOOFCHAN_SHIFT) {
+ case 0:
+ default:
+ return 1;
+ case 1:
+ return 2;
+ case 2:
+ return 4;
+ case 3:
+ return 8;
+ }
+}
+
+struct evergreen_wm_params {
+ u32 dram_channels; /* number of dram channels */
+ u32 yclk; /* bandwidth per dram data pin in kHz */
+ u32 sclk; /* engine clock in kHz */
+ u32 disp_clk; /* display clock in kHz */
+ u32 src_width; /* viewport width */
+ u32 active_time; /* active display time in ns */
+ u32 blank_time; /* blank time in ns */
+ bool interlaced; /* mode is interlaced */
+ fixed20_12 vsc; /* vertical scale ratio */
+ u32 num_heads; /* number of active crtcs */
+ u32 bytes_per_pixel; /* bytes per pixel display + overlay */
+ u32 lb_size; /* line buffer allocated to pipe */
+ u32 vtaps; /* vertical scaler taps */
+};
+
+static u32 evergreen_dram_bandwidth(struct evergreen_wm_params *wm)
+{
+ /* Calculate DRAM Bandwidth and the part allocated to display. */
+ fixed20_12 dram_efficiency; /* 0.7 */
+ fixed20_12 yclk, dram_channels, bandwidth;
+ fixed20_12 a;
+
+ a.full = dfixed_const(1000);
+ yclk.full = dfixed_const(wm->yclk);
+ yclk.full = dfixed_div(yclk, a);
+ dram_channels.full = dfixed_const(wm->dram_channels * 4);
+ a.full = dfixed_const(10);
+ dram_efficiency.full = dfixed_const(7);
+ dram_efficiency.full = dfixed_div(dram_efficiency, a);
+ bandwidth.full = dfixed_mul(dram_channels, yclk);
+ bandwidth.full = dfixed_mul(bandwidth, dram_efficiency);
+
+ return dfixed_trunc(bandwidth);
+}
+
+static u32 evergreen_dram_bandwidth_for_display(struct evergreen_wm_params *wm)
+{
+ /* Calculate DRAM Bandwidth and the part allocated to display. */
+ fixed20_12 disp_dram_allocation; /* 0.3 to 0.7 */
+ fixed20_12 yclk, dram_channels, bandwidth;
+ fixed20_12 a;
+
+ a.full = dfixed_const(1000);
+ yclk.full = dfixed_const(wm->yclk);
+ yclk.full = dfixed_div(yclk, a);
+ dram_channels.full = dfixed_const(wm->dram_channels * 4);
+ a.full = dfixed_const(10);
+ disp_dram_allocation.full = dfixed_const(3); /* XXX worse case value 0.3 */
+ disp_dram_allocation.full = dfixed_div(disp_dram_allocation, a);
+ bandwidth.full = dfixed_mul(dram_channels, yclk);
+ bandwidth.full = dfixed_mul(bandwidth, disp_dram_allocation);
+
+ return dfixed_trunc(bandwidth);
+}
+
+static u32 evergreen_data_return_bandwidth(struct evergreen_wm_params *wm)
+{
+ /* Calculate the display Data return Bandwidth */
+ fixed20_12 return_efficiency; /* 0.8 */
+ fixed20_12 sclk, bandwidth;
+ fixed20_12 a;
+
+ a.full = dfixed_const(1000);
+ sclk.full = dfixed_const(wm->sclk);
+ sclk.full = dfixed_div(sclk, a);
+ a.full = dfixed_const(10);
+ return_efficiency.full = dfixed_const(8);
+ return_efficiency.full = dfixed_div(return_efficiency, a);
+ a.full = dfixed_const(32);
+ bandwidth.full = dfixed_mul(a, sclk);
+ bandwidth.full = dfixed_mul(bandwidth, return_efficiency);
+
+ return dfixed_trunc(bandwidth);
+}
+
+static u32 evergreen_dmif_request_bandwidth(struct evergreen_wm_params *wm)
+{
+ /* Calculate the DMIF Request Bandwidth */
+ fixed20_12 disp_clk_request_efficiency; /* 0.8 */
+ fixed20_12 disp_clk, bandwidth;
+ fixed20_12 a;
+
+ a.full = dfixed_const(1000);
+ disp_clk.full = dfixed_const(wm->disp_clk);
+ disp_clk.full = dfixed_div(disp_clk, a);
+ a.full = dfixed_const(10);
+ disp_clk_request_efficiency.full = dfixed_const(8);
+ disp_clk_request_efficiency.full = dfixed_div(disp_clk_request_efficiency, a);
+ a.full = dfixed_const(32);
+ bandwidth.full = dfixed_mul(a, disp_clk);
+ bandwidth.full = dfixed_mul(bandwidth, disp_clk_request_efficiency);
+
+ return dfixed_trunc(bandwidth);
+}
+
+static u32 evergreen_available_bandwidth(struct evergreen_wm_params *wm)
+{
+ /* Calculate the Available bandwidth. Display can use this temporarily but not in average. */
+ u32 dram_bandwidth = evergreen_dram_bandwidth(wm);
+ u32 data_return_bandwidth = evergreen_data_return_bandwidth(wm);
+ u32 dmif_req_bandwidth = evergreen_dmif_request_bandwidth(wm);
+
+ return min(dram_bandwidth, min(data_return_bandwidth, dmif_req_bandwidth));
+}
+
+static u32 evergreen_average_bandwidth(struct evergreen_wm_params *wm)
+{
+ /* Calculate the display mode Average Bandwidth
+ * DisplayMode should contain the source and destination dimensions,
+ * timing, etc.
+ */
+ fixed20_12 bpp;
+ fixed20_12 line_time;
+ fixed20_12 src_width;
+ fixed20_12 bandwidth;
+ fixed20_12 a;
+
+ a.full = dfixed_const(1000);
+ line_time.full = dfixed_const(wm->active_time + wm->blank_time);
+ line_time.full = dfixed_div(line_time, a);
+ bpp.full = dfixed_const(wm->bytes_per_pixel);
+ src_width.full = dfixed_const(wm->src_width);
+ bandwidth.full = dfixed_mul(src_width, bpp);
+ bandwidth.full = dfixed_mul(bandwidth, wm->vsc);
+ bandwidth.full = dfixed_div(bandwidth, line_time);
+
+ return dfixed_trunc(bandwidth);
+}
+
+static u32 evergreen_latency_watermark(struct evergreen_wm_params *wm)
+{
+ /* First calcualte the latency in ns */
+ u32 mc_latency = 2000; /* 2000 ns. */
+ u32 available_bandwidth = evergreen_available_bandwidth(wm);
+ u32 worst_chunk_return_time = (512 * 8 * 1000) / available_bandwidth;
+ u32 cursor_line_pair_return_time = (128 * 4 * 1000) / available_bandwidth;
+ u32 dc_latency = 40000000 / wm->disp_clk; /* dc pipe latency */
+ u32 other_heads_data_return_time = ((wm->num_heads + 1) * worst_chunk_return_time) +
+ (wm->num_heads * cursor_line_pair_return_time);
+ u32 latency = mc_latency + other_heads_data_return_time + dc_latency;
+ u32 max_src_lines_per_dst_line, lb_fill_bw, line_fill_time;
+ fixed20_12 a, b, c;
+
+ if (wm->num_heads == 0)
+ return 0;
+
+ a.full = dfixed_const(2);
+ b.full = dfixed_const(1);
+ if ((wm->vsc.full > a.full) ||
+ ((wm->vsc.full > b.full) && (wm->vtaps >= 3)) ||
+ (wm->vtaps >= 5) ||
+ ((wm->vsc.full >= a.full) && wm->interlaced))
+ max_src_lines_per_dst_line = 4;
+ else
+ max_src_lines_per_dst_line = 2;
+
+ a.full = dfixed_const(available_bandwidth);
+ b.full = dfixed_const(wm->num_heads);
+ a.full = dfixed_div(a, b);
+
+ b.full = dfixed_const(1000);
+ c.full = dfixed_const(wm->disp_clk);
+ b.full = dfixed_div(c, b);
+ c.full = dfixed_const(wm->bytes_per_pixel);
+ b.full = dfixed_mul(b, c);
+
+ lb_fill_bw = min(dfixed_trunc(a), dfixed_trunc(b));
+
+ a.full = dfixed_const(max_src_lines_per_dst_line * wm->src_width * wm->bytes_per_pixel);
+ b.full = dfixed_const(1000);
+ c.full = dfixed_const(lb_fill_bw);
+ b.full = dfixed_div(c, b);
+ a.full = dfixed_div(a, b);
+ line_fill_time = dfixed_trunc(a);
+
+ if (line_fill_time < wm->active_time)
+ return latency;
+ else
+ return latency + (line_fill_time - wm->active_time);
+
+}
+
+static bool evergreen_average_bandwidth_vs_dram_bandwidth_for_display(struct evergreen_wm_params *wm)
+{
+ if (evergreen_average_bandwidth(wm) <=
+ (evergreen_dram_bandwidth_for_display(wm) / wm->num_heads))
+ return true;
+ else
+ return false;
+};
+
+static bool evergreen_average_bandwidth_vs_available_bandwidth(struct evergreen_wm_params *wm)
+{
+ if (evergreen_average_bandwidth(wm) <=
+ (evergreen_available_bandwidth(wm) / wm->num_heads))
+ return true;
+ else
+ return false;
+};
+
+static bool evergreen_check_latency_hiding(struct evergreen_wm_params *wm)
+{
+ u32 lb_partitions = wm->lb_size / wm->src_width;
+ u32 line_time = wm->active_time + wm->blank_time;
+ u32 latency_tolerant_lines;
+ u32 latency_hiding;
+ fixed20_12 a;
+
+ a.full = dfixed_const(1);
+ if (wm->vsc.full > a.full)
+ latency_tolerant_lines = 1;
+ else {
+ if (lb_partitions <= (wm->vtaps + 1))
+ latency_tolerant_lines = 1;
+ else
+ latency_tolerant_lines = 2;
+ }
+
+ latency_hiding = (latency_tolerant_lines * line_time + wm->blank_time);
+
+ if (evergreen_latency_watermark(wm) <= latency_hiding)
+ return true;
+ else
+ return false;
+}
+
+static void evergreen_program_watermarks(struct radeon_device *rdev,
+ struct radeon_crtc *radeon_crtc,
+ u32 lb_size, u32 num_heads)
+{
+ struct drm_display_mode *mode = &radeon_crtc->base.mode;
+ struct evergreen_wm_params wm;
+ u32 pixel_period;
+ u32 line_time = 0;
+ u32 latency_watermark_a = 0, latency_watermark_b = 0;
+ u32 priority_a_mark = 0, priority_b_mark = 0;
+ u32 priority_a_cnt = PRIORITY_OFF;
+ u32 priority_b_cnt = PRIORITY_OFF;
+ u32 pipe_offset = radeon_crtc->crtc_id * 16;
+ u32 tmp, arb_control3;
+ fixed20_12 a, b, c;
+
+ if (radeon_crtc->base.enabled && num_heads && mode) {
+ pixel_period = 1000000 / (u32)mode->clock;
+ line_time = min((u32)mode->crtc_htotal * pixel_period, (u32)65535);
+ priority_a_cnt = 0;
+ priority_b_cnt = 0;
+
+ wm.yclk = rdev->pm.current_mclk * 10;
+ wm.sclk = rdev->pm.current_sclk * 10;
+ wm.disp_clk = mode->clock;
+ wm.src_width = mode->crtc_hdisplay;
+ wm.active_time = mode->crtc_hdisplay * pixel_period;
+ wm.blank_time = line_time - wm.active_time;
+ wm.interlaced = false;
+ if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+ wm.interlaced = true;
+ wm.vsc = radeon_crtc->vsc;
+ wm.vtaps = 1;
+ if (radeon_crtc->rmx_type != RMX_OFF)
+ wm.vtaps = 2;
+ wm.bytes_per_pixel = 4; /* XXX: get this from fb config */
+ wm.lb_size = lb_size;
+ wm.dram_channels = evergreen_get_number_of_dram_channels(rdev);
+ wm.num_heads = num_heads;
+
+ /* set for high clocks */
+ latency_watermark_a = min(evergreen_latency_watermark(&wm), (u32)65535);
+ /* set for low clocks */
+ /* wm.yclk = low clk; wm.sclk = low clk */
+ latency_watermark_b = min(evergreen_latency_watermark(&wm), (u32)65535);
+
+ /* possibly force display priority to high */
+ /* should really do this at mode validation time... */
+ if (!evergreen_average_bandwidth_vs_dram_bandwidth_for_display(&wm) ||
+ !evergreen_average_bandwidth_vs_available_bandwidth(&wm) ||
+ !evergreen_check_latency_hiding(&wm) ||
+ (rdev->disp_priority == 2)) {
+ DRM_INFO("force priority to high\n");
+ priority_a_cnt |= PRIORITY_ALWAYS_ON;
+ priority_b_cnt |= PRIORITY_ALWAYS_ON;
+ }
+
+ a.full = dfixed_const(1000);
+ b.full = dfixed_const(mode->clock);
+ b.full = dfixed_div(b, a);
+ c.full = dfixed_const(latency_watermark_a);
+ c.full = dfixed_mul(c, b);
+ c.full = dfixed_mul(c, radeon_crtc->hsc);
+ c.full = dfixed_div(c, a);
+ a.full = dfixed_const(16);
+ c.full = dfixed_div(c, a);
+ priority_a_mark = dfixed_trunc(c);
+ priority_a_cnt |= priority_a_mark & PRIORITY_MARK_MASK;
+
+ a.full = dfixed_const(1000);
+ b.full = dfixed_const(mode->clock);
+ b.full = dfixed_div(b, a);
+ c.full = dfixed_const(latency_watermark_b);
+ c.full = dfixed_mul(c, b);
+ c.full = dfixed_mul(c, radeon_crtc->hsc);
+ c.full = dfixed_div(c, a);
+ a.full = dfixed_const(16);
+ c.full = dfixed_div(c, a);
+ priority_b_mark = dfixed_trunc(c);
+ priority_b_cnt |= priority_b_mark & PRIORITY_MARK_MASK;
+ }
+
+ /* select wm A */
+ arb_control3 = RREG32(PIPE0_ARBITRATION_CONTROL3 + pipe_offset);
+ tmp = arb_control3;
+ tmp &= ~LATENCY_WATERMARK_MASK(3);
+ tmp |= LATENCY_WATERMARK_MASK(1);
+ WREG32(PIPE0_ARBITRATION_CONTROL3 + pipe_offset, tmp);
+ WREG32(PIPE0_LATENCY_CONTROL + pipe_offset,
+ (LATENCY_LOW_WATERMARK(latency_watermark_a) |
+ LATENCY_HIGH_WATERMARK(line_time)));
+ /* select wm B */
+ tmp = RREG32(PIPE0_ARBITRATION_CONTROL3 + pipe_offset);
+ tmp &= ~LATENCY_WATERMARK_MASK(3);
+ tmp |= LATENCY_WATERMARK_MASK(2);
+ WREG32(PIPE0_ARBITRATION_CONTROL3 + pipe_offset, tmp);
+ WREG32(PIPE0_LATENCY_CONTROL + pipe_offset,
+ (LATENCY_LOW_WATERMARK(latency_watermark_b) |
+ LATENCY_HIGH_WATERMARK(line_time)));
+ /* restore original selection */
+ WREG32(PIPE0_ARBITRATION_CONTROL3 + pipe_offset, arb_control3);
+
+ /* write the priority marks */
+ WREG32(PRIORITY_A_CNT + radeon_crtc->crtc_offset, priority_a_cnt);
+ WREG32(PRIORITY_B_CNT + radeon_crtc->crtc_offset, priority_b_cnt);
+
+}
+
void evergreen_bandwidth_update(struct radeon_device *rdev)
{
- /* XXX */
+ struct drm_display_mode *mode0 = NULL;
+ struct drm_display_mode *mode1 = NULL;
+ u32 num_heads = 0, lb_size;
+ int i;
+
+ radeon_update_display_priority(rdev);
+
+ for (i = 0; i < rdev->num_crtc; i++) {
+ if (rdev->mode_info.crtcs[i]->base.enabled)
+ num_heads++;
+ }
+ for (i = 0; i < rdev->num_crtc; i += 2) {
+ mode0 = &rdev->mode_info.crtcs[i]->base.mode;
+ mode1 = &rdev->mode_info.crtcs[i+1]->base.mode;
+ lb_size = evergreen_line_buffer_adjust(rdev, rdev->mode_info.crtcs[i], mode0, mode1);
+ evergreen_program_watermarks(rdev, rdev->mode_info.crtcs[i], lb_size, num_heads);
+ lb_size = evergreen_line_buffer_adjust(rdev, rdev->mode_info.crtcs[i+1], mode1, mode0);
+ evergreen_program_watermarks(rdev, rdev->mode_info.crtcs[i+1], lb_size, num_heads);
+ }
}
static int evergreen_mc_wait_for_idle(struct radeon_device *rdev)
projects / platform / kernel / kernel-mfld-blackbay.git / commitdiff