From: Alex Deucher alexander.deucher@amd.com
Signed-off-by: Alex Deucher alexander.deucher@amd.com --- drivers/gpu/drm/radeon/cik.c | 537 +++++++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/radeon/cikd.h | 11 + 2 files changed, 548 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c index cbc64a2..228d399 100644 --- a/drivers/gpu/drm/radeon/cik.c +++ b/drivers/gpu/drm/radeon/cik.c @@ -5021,3 +5021,540 @@ void cik_fini(struct radeon_device *rdev) kfree(rdev->bios); rdev->bios = NULL; } + +/* display watermark setup */ +/** + * dce8_line_buffer_adjust - Set up the line buffer + * + * @rdev: radeon_device pointer + * @radeon_crtc: the selected display controller + * @mode: the current display mode on the selected display + * controller + * + * Setup up the line buffer allocation for + * the selected display controller (CIK). + * Returns the line buffer size in pixels. + */ +static u32 dce8_line_buffer_adjust(struct radeon_device *rdev, + struct radeon_crtc *radeon_crtc, + struct drm_display_mode *mode) +{ + u32 tmp; + + /* + * Line Buffer Setup + * There are 6 line buffers, one for each display controllers. + * There are 3 partitions per LB. Select the number of partitions + * to enable based on the display width. For display widths larger + * than 4096, you need use to use 2 display controllers and combine + * them using the stereo blender. + */ + if (radeon_crtc->base.enabled && mode) { + if (mode->crtc_hdisplay < 1920) + tmp = 1; + else if (mode->crtc_hdisplay < 2560) + tmp = 2; + else if (mode->crtc_hdisplay < 4096) + tmp = 0; + else { + DRM_DEBUG_KMS("Mode too big for LB!\n"); + tmp = 0; + } + } else + tmp = 1; + + WREG32(LB_MEMORY_CTRL + radeon_crtc->crtc_offset, + LB_MEMORY_CONFIG(tmp) | LB_MEMORY_SIZE(0x6B0)); + + if (radeon_crtc->base.enabled && mode) { + switch (tmp) { + case 0: + default: + return 4096 * 2; + case 1: + return 1920 * 2; + case 2: + return 2560 * 2; + } + } + + /* controller not enabled, so no lb used */ + return 0; +} + +/** + * cik_get_number_of_dram_channels - get the number of dram channels + * + * @rdev: radeon_device pointer + * + * Look up the number of video ram channels (CIK). + * Used for display watermark bandwidth calculations + * Returns the number of dram channels + */ +static u32 cik_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; + case 4: + return 3; + case 5: + return 6; + case 6: + return 10; + case 7: + return 12; + case 8: + return 16; + } +} + +struct dce8_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 */ +}; + +/** + * dce8_dram_bandwidth - get the dram bandwidth + * + * @wm: watermark calculation data + * + * Calculate the raw dram bandwidth (CIK). + * Used for display watermark bandwidth calculations + * Returns the dram bandwidth in MBytes/s + */ +static u32 dce8_dram_bandwidth(struct dce8_wm_params *wm) +{ + /* Calculate raw DRAM Bandwidth */ + 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); +} + +/** + * dce8_dram_bandwidth_for_display - get the dram bandwidth for display + * + * @wm: watermark calculation data + * + * Calculate the dram bandwidth used for display (CIK). + * Used for display watermark bandwidth calculations + * Returns the dram bandwidth for display in MBytes/s + */ +static u32 dce8_dram_bandwidth_for_display(struct dce8_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); +} + +/** + * dce8_data_return_bandwidth - get the data return bandwidth + * + * @wm: watermark calculation data + * + * Calculate the data return bandwidth used for display (CIK). + * Used for display watermark bandwidth calculations + * Returns the data return bandwidth in MBytes/s + */ +static u32 dce8_data_return_bandwidth(struct dce8_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); +} + +/** + * dce8_dmif_request_bandwidth - get the dmif bandwidth + * + * @wm: watermark calculation data + * + * Calculate the dmif bandwidth used for display (CIK). + * Used for display watermark bandwidth calculations + * Returns the dmif bandwidth in MBytes/s + */ +static u32 dce8_dmif_request_bandwidth(struct dce8_wm_params *wm) +{ + /* Calculate the DMIF Request Bandwidth */ + fixed20_12 disp_clk_request_efficiency; /* 0.8 */ + fixed20_12 disp_clk, bandwidth; + fixed20_12 a, b; + + 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(32); + b.full = dfixed_mul(a, disp_clk); + + 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); + + bandwidth.full = dfixed_mul(b, disp_clk_request_efficiency); + + return dfixed_trunc(bandwidth); +} + +/** + * dce8_available_bandwidth - get the min available bandwidth + * + * @wm: watermark calculation data + * + * Calculate the min available bandwidth used for display (CIK). + * Used for display watermark bandwidth calculations + * Returns the min available bandwidth in MBytes/s + */ +static u32 dce8_available_bandwidth(struct dce8_wm_params *wm) +{ + /* Calculate the Available bandwidth. Display can use this temporarily but not in average. */ + u32 dram_bandwidth = dce8_dram_bandwidth(wm); + u32 data_return_bandwidth = dce8_data_return_bandwidth(wm); + u32 dmif_req_bandwidth = dce8_dmif_request_bandwidth(wm); + + return min(dram_bandwidth, min(data_return_bandwidth, dmif_req_bandwidth)); +} + +/** + * dce8_average_bandwidth - get the average available bandwidth + * + * @wm: watermark calculation data + * + * Calculate the average available bandwidth used for display (CIK). + * Used for display watermark bandwidth calculations + * Returns the average available bandwidth in MBytes/s + */ +static u32 dce8_average_bandwidth(struct dce8_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); +} + +/** + * dce8_latency_watermark - get the latency watermark + * + * @wm: watermark calculation data + * + * Calculate the latency watermark (CIK). + * Used for display watermark bandwidth calculations + * Returns the latency watermark in ns + */ +static u32 dce8_latency_watermark(struct dce8_wm_params *wm) +{ + /* First calculate the latency in ns */ + u32 mc_latency = 2000; /* 2000 ns. */ + u32 available_bandwidth = dce8_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; + u32 tmp, dmif_size = 12288; + 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(mc_latency + 512); + c.full = dfixed_const(wm->disp_clk); + b.full = dfixed_div(b, c); + + c.full = dfixed_const(dmif_size); + b.full = dfixed_div(c, b); + + tmp = min(dfixed_trunc(a), dfixed_trunc(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(tmp, 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); + +} + +/** + * dce8_average_bandwidth_vs_dram_bandwidth_for_display - check + * average and available dram bandwidth + * + * @wm: watermark calculation data + * + * Check if the display average bandwidth fits in the display + * dram bandwidth (CIK). + * Used for display watermark bandwidth calculations + * Returns true if the display fits, false if not. + */ +static bool dce8_average_bandwidth_vs_dram_bandwidth_for_display(struct dce8_wm_params *wm) +{ + if (dce8_average_bandwidth(wm) <= + (dce8_dram_bandwidth_for_display(wm) / wm->num_heads)) + return true; + else + return false; +} + +/** + * dce8_average_bandwidth_vs_available_bandwidth - check + * average and available bandwidth + * + * @wm: watermark calculation data + * + * Check if the display average bandwidth fits in the display + * available bandwidth (CIK). + * Used for display watermark bandwidth calculations + * Returns true if the display fits, false if not. + */ +static bool dce8_average_bandwidth_vs_available_bandwidth(struct dce8_wm_params *wm) +{ + if (dce8_average_bandwidth(wm) <= + (dce8_available_bandwidth(wm) / wm->num_heads)) + return true; + else + return false; +} + +/** + * dce8_check_latency_hiding - check latency hiding + * + * @wm: watermark calculation data + * + * Check latency hiding (CIK). + * Used for display watermark bandwidth calculations + * Returns true if the display fits, false if not. + */ +static bool dce8_check_latency_hiding(struct dce8_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 (dce8_latency_watermark(wm) <= latency_hiding) + return true; + else + return false; +} + +/** + * dce8_program_watermarks - program display watermarks + * + * @rdev: radeon_device pointer + * @radeon_crtc: the selected display controller + * @lb_size: line buffer size + * @num_heads: number of display controllers in use + * + * Calculate and program the display watermarks for the + * selected display controller (CIK). + */ +static void dce8_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 dce8_wm_params wm; + u32 pixel_period; + u32 line_time = 0; + u32 latency_watermark_a = 0, latency_watermark_b = 0; + u32 tmp, wm_mask; + + 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); + + 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 = cik_get_number_of_dram_channels(rdev); + wm.num_heads = num_heads; + + /* set for high clocks */ + latency_watermark_a = min(dce8_latency_watermark(&wm), (u32)65535); + /* set for low clocks */ + /* wm.yclk = low clk; wm.sclk = low clk */ + latency_watermark_b = min(dce8_latency_watermark(&wm), (u32)65535); + + /* possibly force display priority to high */ + /* should really do this at mode validation time... */ + if (!dce8_average_bandwidth_vs_dram_bandwidth_for_display(&wm) || + !dce8_average_bandwidth_vs_available_bandwidth(&wm) || + !dce8_check_latency_hiding(&wm) || + (rdev->disp_priority == 2)) { + DRM_DEBUG_KMS("force priority to high\n"); + } + } + + /* select wm A */ + wm_mask = RREG32(DPG_WATERMARK_MASK_CONTROL + radeon_crtc->crtc_offset); + tmp = wm_mask; + tmp &= ~LATENCY_WATERMARK_MASK(3); + tmp |= LATENCY_WATERMARK_MASK(1); + WREG32(DPG_WATERMARK_MASK_CONTROL + radeon_crtc->crtc_offset, tmp); + WREG32(DPG_PIPE_LATENCY_CONTROL + radeon_crtc->crtc_offset, + (LATENCY_LOW_WATERMARK(latency_watermark_a) | + LATENCY_HIGH_WATERMARK(line_time))); + /* select wm B */ + tmp = RREG32(DPG_WATERMARK_MASK_CONTROL + radeon_crtc->crtc_offset); + tmp &= ~LATENCY_WATERMARK_MASK(3); + tmp |= LATENCY_WATERMARK_MASK(2); + WREG32(DPG_WATERMARK_MASK_CONTROL + radeon_crtc->crtc_offset, tmp); + WREG32(DPG_PIPE_LATENCY_CONTROL + radeon_crtc->crtc_offset, + (LATENCY_LOW_WATERMARK(latency_watermark_b) | + LATENCY_HIGH_WATERMARK(line_time))); + /* restore original selection */ + WREG32(DPG_WATERMARK_MASK_CONTROL + radeon_crtc->crtc_offset, wm_mask); +} + +/** + * dce8_bandwidth_update - program display watermarks + * + * @rdev: radeon_device pointer + * + * Calculate and program the display watermarks and line + * buffer allocation (CIK). + */ +void dce8_bandwidth_update(struct radeon_device *rdev) +{ + struct drm_display_mode *mode = 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++) { + mode = &rdev->mode_info.crtcs[i]->base.mode; + lb_size = dce8_line_buffer_adjust(rdev, rdev->mode_info.crtcs[i], mode); + dce8_program_watermarks(rdev, rdev->mode_info.crtcs[i], lb_size, num_heads); + } +} diff --git a/drivers/gpu/drm/radeon/cikd.h b/drivers/gpu/drm/radeon/cikd.h index 39ed517..3349e37 100644 --- a/drivers/gpu/drm/radeon/cikd.h +++ b/drivers/gpu/drm/radeon/cikd.h @@ -259,6 +259,17 @@ #define SDMA0 (1 << 10) #define SDMA1 (1 << 11)
+/* 0x6b04, 0x7704, 0x10304, 0x10f04, 0x11b04, 0x12704 */ +#define LB_MEMORY_CTRL 0x6b04 +#define LB_MEMORY_SIZE(x) ((x) << 0) +#define LB_MEMORY_CONFIG(x) ((x) << 20) + +#define DPG_WATERMARK_MASK_CONTROL 0x6cc8 +# define LATENCY_WATERMARK_MASK(x) ((x) << 8) +#define DPG_PIPE_LATENCY_CONTROL 0x6ccc +# define LATENCY_LOW_WATERMARK(x) ((x) << 0) +# define LATENCY_HIGH_WATERMARK(x) ((x) << 16) + /* 0x6b24, 0x7724, 0x10324, 0x10f24, 0x11b24, 0x12724 */ #define LB_VLINE_STATUS 0x6b24 # define VLINE_OCCURRED (1 << 0)