diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 41 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_drv.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_sprite.c | 26 |
4 files changed, 70 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 749d238..43397e5 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -6789,6 +6789,10 @@ enum { #define _PS_VPHASE_1B 0x68988 #define _PS_VPHASE_2B 0x68A88 #define _PS_VPHASE_1C 0x69188 +#define PS_Y_PHASE(x) ((x) << 16) +#define PS_UV_RGB_PHASE(x) ((x) << 0) +#define PS_PHASE_MASK (0x7fff << 1) /* u2.13 */ +#define PS_PHASE_TRIP (1 << 0) #define _PS_HPHASE_1A 0x68194 #define _PS_HPHASE_2A 0x68294 diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index b422312..141ded5 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4752,6 +4752,39 @@ static void cpt_verify_modeset(struct drm_device *dev, int pipe) } } +/* + * The hardware phase 0.0 refers to the center of the pixel. + * We want to start from the top/left edge which is phase + * -0.5. That matches how the hardware calculates the scaling + * factors (from top-left of the first pixel to bottom-right + * of the last pixel, as opposed to the pixel centers). + * + * For 4:2:0 subsampled chroma planes we obviously have to + * adjust that so that the chroma sample position lands in + * the right spot. + * + * Note that for packed YCbCr 4:2:2 formats there is no way to + * control chroma siting. The hardware simply replicates the + * chroma samples for both of the luma samples, and thus we don't + * actually get the expected MPEG2 chroma siting convention :( + * The same behaviour is observed on pre-SKL platforms as well. + */ +u16 skl_scaler_calc_phase(int sub, bool chroma_cosited) +{ + int phase = -0x8000; + u16 trip = 0; + + if (chroma_cosited) + phase += (sub - 1) * 0x8000 / sub; + + if (phase < 0) + phase = 0x10000 + phase; + else + trip = PS_PHASE_TRIP; + + return ((phase >> 2) & PS_PHASE_MASK) | trip; +} + static int skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach, unsigned int scaler_user, int *scaler_id, @@ -4951,14 +4984,22 @@ static void skylake_pfit_enable(struct intel_crtc *crtc) &crtc->config->scaler_state; if (crtc->config->pch_pfit.enabled) { + u16 uv_rgb_hphase, uv_rgb_vphase; int id; if (WARN_ON(crtc->config->scaler_state.scaler_id < 0)) return; + uv_rgb_hphase = skl_scaler_calc_phase(1, false); + uv_rgb_vphase = skl_scaler_calc_phase(1, false); + id = scaler_state->scaler_id; I915_WRITE(SKL_PS_CTRL(pipe, id), PS_SCALER_EN | PS_FILTER_MEDIUM | scaler_state->scalers[id].mode); + I915_WRITE_FW(SKL_PS_VPHASE(pipe, id), + PS_Y_PHASE(0) | PS_UV_RGB_PHASE(uv_rgb_vphase)); + I915_WRITE_FW(SKL_PS_HPHASE(pipe, id), + PS_Y_PHASE(0) | PS_UV_RGB_PHASE(uv_rgb_hphase)); I915_WRITE(SKL_PS_WIN_POS(pipe, id), crtc->config->pch_pfit.pos); I915_WRITE(SKL_PS_WIN_SZ(pipe, id), crtc->config->pch_pfit.size); } diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 1a4659a..b1bb1a9 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -1616,6 +1616,7 @@ void intel_mode_from_pipe_config(struct drm_display_mode *mode, void intel_crtc_arm_fifo_underrun(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state); +u16 skl_scaler_calc_phase(int sub, bool chroma_center); int skl_update_scaler_crtc(struct intel_crtc_state *crtc_state); int skl_max_scale(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state, uint32_t pixel_format); diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c index 350c61c..24f86c4 100644 --- a/drivers/gpu/drm/i915/intel_sprite.c +++ b/drivers/gpu/drm/i915/intel_sprite.c @@ -284,13 +284,35 @@ skl_update_plane(struct intel_plane *plane, /* program plane scaler */ if (plane_state->scaler_id >= 0) { int scaler_id = plane_state->scaler_id; - const struct intel_scaler *scaler; + const struct intel_scaler *scaler = + &crtc_state->scaler_state.scalers[scaler_id]; + u16 y_hphase, uv_rgb_hphase; + u16 y_vphase, uv_rgb_vphase; + + /* TODO: handle sub-pixel coordinates */ + if (fb->format->format == DRM_FORMAT_NV12) { + y_hphase = skl_scaler_calc_phase(1, false); + y_vphase = skl_scaler_calc_phase(1, false); + + /* MPEG2 chroma siting convention */ + uv_rgb_hphase = skl_scaler_calc_phase(2, true); + uv_rgb_vphase = skl_scaler_calc_phase(2, false); + } else { + /* not used */ + y_hphase = 0; + y_vphase = 0; - scaler = &crtc_state->scaler_state.scalers[scaler_id]; + uv_rgb_hphase = skl_scaler_calc_phase(1, false); + uv_rgb_vphase = skl_scaler_calc_phase(1, false); + } I915_WRITE_FW(SKL_PS_CTRL(pipe, scaler_id), PS_SCALER_EN | PS_PLANE_SEL(plane_id) | scaler->mode); I915_WRITE_FW(SKL_PS_PWR_GATE(pipe, scaler_id), 0); + I915_WRITE_FW(SKL_PS_VPHASE(pipe, scaler_id), + PS_Y_PHASE(y_vphase) | PS_UV_RGB_PHASE(uv_rgb_vphase)); + I915_WRITE_FW(SKL_PS_HPHASE(pipe, scaler_id), + PS_Y_PHASE(y_hphase) | PS_UV_RGB_PHASE(uv_rgb_hphase)); I915_WRITE_FW(SKL_PS_WIN_POS(pipe, scaler_id), (crtc_x << 16) | crtc_y); I915_WRITE_FW(SKL_PS_WIN_SZ(pipe, scaler_id), ((crtc_w + 1) << 16)|(crtc_h + 1)); |
