Merge tag 'drm-misc-next-2017-04-07' of git://anongit.freedesktop.org/git/drm-misc...

[linux.git] / drivers / gpu / drm / amd / amdgpu / dce_v10_0.c

diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
index daf003dd2351b465fa92aea0820ac15c3b7e2df4..ba98d35340a3025e863d3b7d871ddcd179a66703 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
@@ -1090,23 +1090,10 @@ static u32 dce_v10_0_latency_watermark(struct dce10_wm_params *wm)
        a.full = dfixed_const(available_bandwidth);
        b.full = dfixed_const(wm->num_heads);
        a.full = dfixed_div(a, b);
+       tmp = div_u64((u64) dmif_size * (u64) wm->disp_clk, mc_latency + 512);
+       tmp = min(dfixed_trunc(a), tmp);
 
-       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));
+       lb_fill_bw = min(tmp, wm->disp_clk * wm->bytes_per_pixel / 1000);
 
        a.full = dfixed_const(max_src_lines_per_dst_line * wm->src_width * wm->bytes_per_pixel);
        b.full = dfixed_const(1000);
@@ -1214,14 +1201,14 @@ static void dce_v10_0_program_watermarks(struct amdgpu_device *adev,
 {
        struct drm_display_mode *mode = &amdgpu_crtc->base.mode;
        struct dce10_wm_params wm_low, wm_high;
-       u32 pixel_period;
+       u32 active_time;
        u32 line_time = 0;
        u32 latency_watermark_a = 0, latency_watermark_b = 0;
        u32 tmp, wm_mask, lb_vblank_lead_lines = 0;
 
        if (amdgpu_crtc->base.enabled && num_heads && mode) {
-               pixel_period = 1000000 / (u32)mode->clock;
-               line_time = min((u32)mode->crtc_htotal * pixel_period, (u32)65535);
+               active_time = 1000000UL * (u32)mode->crtc_hdisplay / (u32)mode->clock;
+               line_time = min((u32) (1000000UL * (u32)mode->crtc_htotal / (u32)mode->clock), (u32)65535);
 
                /* watermark for high clocks */
                if (adev->pm.dpm_enabled) {
@@ -1236,7 +1223,7 @@ static void dce_v10_0_program_watermarks(struct amdgpu_device *adev,
 
                wm_high.disp_clk = mode->clock;
                wm_high.src_width = mode->crtc_hdisplay;
-               wm_high.active_time = mode->crtc_hdisplay * pixel_period;
+               wm_high.active_time = active_time;
                wm_high.blank_time = line_time - wm_high.active_time;
                wm_high.interlaced = false;
                if (mode->flags & DRM_MODE_FLAG_INTERLACE)
@@ -1275,7 +1262,7 @@ static void dce_v10_0_program_watermarks(struct amdgpu_device *adev,
 
                wm_low.disp_clk = mode->clock;
                wm_low.src_width = mode->crtc_hdisplay;
-               wm_low.active_time = mode->crtc_hdisplay * pixel_period;
+               wm_low.active_time = active_time;
                wm_low.blank_time = line_time - wm_low.active_time;
                wm_low.interlaced = false;
                if (mode->flags & DRM_MODE_FLAG_INTERLACE)