From: Ville Syrjälä Date: Wed, 20 Oct 2021 21:27:57 +0000 (+0300) Subject: drm/i915: Split pre-skl primary plane update into noarm+arm pair X-Git-Tag: v6.1-rc5~176^2~17^2~905 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4d0d77de9af455aa949766ecad1ac3232e322020;p=platform%2Fkernel%2Flinux-starfive.git drm/i915: Split pre-skl primary plane update into noarm+arm pair Chop i9xx_plane_update() into two halves. Fist half becomes the _noarm() variant, second part the _arm() variant. Fortunately I have already previously grouped the register writes into roughtly the correct order, so the split looks surprisingly clean. One slightly surprising fact was that the CHV pipe B PRIMPOS/SIZE registers are self arming unlike their pre-ctg DSPPOS/SIZE counterparts. In fact all the new CHV pipe B registers are self arming. Also we must remind ourselves that i830/i845 are a bit borked in that all of their plane registers are self-arming. I didn't do any i915_update_info measurements for this one alone. I'll get total numbers with the corrsponding sprite plane changes. v2: Don't break my precious i830/i845 Cc: Stanislav Lisovskiy Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20211020212757.13517-1-ville.syrjala@linux.intel.com Reviewed-by: Stanislav Lisovskiy --- diff --git a/drivers/gpu/drm/i915/display/i9xx_plane.c b/drivers/gpu/drm/i915/display/i9xx_plane.c index d8e8a57..ba276e8 100644 --- a/drivers/gpu/drm/i915/display/i9xx_plane.c +++ b/drivers/gpu/drm/i915/display/i9xx_plane.c @@ -402,23 +402,49 @@ static int i9xx_plane_min_cdclk(const struct intel_crtc_state *crtc_state, return DIV_ROUND_UP(pixel_rate * num, den); } -/* TODO: split into noarm+arm pair */ +static void i9xx_plane_update_noarm(struct intel_plane *plane, + const struct intel_crtc_state *crtc_state, + const struct intel_plane_state *plane_state) +{ + struct drm_i915_private *dev_priv = to_i915(plane->base.dev); + enum i9xx_plane_id i9xx_plane = plane->i9xx_plane; + unsigned long irqflags; + + spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); + + intel_de_write_fw(dev_priv, DSPSTRIDE(i9xx_plane), + plane_state->view.color_plane[0].mapping_stride); + + if (DISPLAY_VER(dev_priv) < 4) { + int crtc_x = plane_state->uapi.dst.x1; + int crtc_y = plane_state->uapi.dst.y1; + int crtc_w = drm_rect_width(&plane_state->uapi.dst); + int crtc_h = drm_rect_height(&plane_state->uapi.dst); + + /* + * PLANE_A doesn't actually have a full window + * generator but let's assume we still need to + * program whatever is there. + */ + intel_de_write_fw(dev_priv, DSPPOS(i9xx_plane), + (crtc_y << 16) | crtc_x); + intel_de_write_fw(dev_priv, DSPSIZE(i9xx_plane), + ((crtc_h - 1) << 16) | (crtc_w - 1)); + } + + spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); +} + static void i9xx_plane_update_arm(struct intel_plane *plane, const struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state) { struct drm_i915_private *dev_priv = to_i915(plane->base.dev); enum i9xx_plane_id i9xx_plane = plane->i9xx_plane; - u32 linear_offset; int x = plane_state->view.color_plane[0].x; int y = plane_state->view.color_plane[0].y; - int crtc_x = plane_state->uapi.dst.x1; - int crtc_y = plane_state->uapi.dst.y1; - int crtc_w = drm_rect_width(&plane_state->uapi.dst); - int crtc_h = drm_rect_height(&plane_state->uapi.dst); + u32 dspcntr, dspaddr_offset, linear_offset; unsigned long irqflags; - u32 dspaddr_offset; - u32 dspcntr; dspcntr = plane_state->ctl | i9xx_plane_ctl_crtc(crtc_state); @@ -431,20 +457,12 @@ static void i9xx_plane_update_arm(struct intel_plane *plane, spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); - intel_de_write_fw(dev_priv, DSPSTRIDE(i9xx_plane), - plane_state->view.color_plane[0].mapping_stride); + if (IS_CHERRYVIEW(dev_priv) && i9xx_plane == PLANE_B) { + int crtc_x = plane_state->uapi.dst.x1; + int crtc_y = plane_state->uapi.dst.y1; + int crtc_w = drm_rect_width(&plane_state->uapi.dst); + int crtc_h = drm_rect_height(&plane_state->uapi.dst); - if (DISPLAY_VER(dev_priv) < 4) { - /* - * PLANE_A doesn't actually have a full window - * generator but let's assume we still need to - * program whatever is there. - */ - intel_de_write_fw(dev_priv, DSPPOS(i9xx_plane), - (crtc_y << 16) | crtc_x); - intel_de_write_fw(dev_priv, DSPSIZE(i9xx_plane), - ((crtc_h - 1) << 16) | (crtc_w - 1)); - } else if (IS_CHERRYVIEW(dev_priv) && i9xx_plane == PLANE_B) { intel_de_write_fw(dev_priv, PRIMPOS(i9xx_plane), (crtc_y << 16) | crtc_x); intel_de_write_fw(dev_priv, PRIMSIZE(i9xx_plane), @@ -478,6 +496,20 @@ static void i9xx_plane_update_arm(struct intel_plane *plane, spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); } +static void i830_plane_update_arm(struct intel_plane *plane, + const struct intel_crtc_state *crtc_state, + const struct intel_plane_state *plane_state) +{ + /* + * On i830/i845 all registers are self-arming [ALM040]. + * + * Additional breakage on i830 causes register reads to return + * the last latched value instead of the last written value [ALM026]. + */ + i9xx_plane_update_noarm(plane, crtc_state, plane_state); + i9xx_plane_update_arm(plane, crtc_state, plane_state); +} + static void i9xx_plane_disable_arm(struct intel_plane *plane, const struct intel_crtc_state *crtc_state) { @@ -837,7 +869,12 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe) plane->max_stride = ilk_primary_max_stride; } - plane->update_arm = i9xx_plane_update_arm; + if (IS_I830(dev_priv) || IS_I845G(dev_priv)) { + plane->update_arm = i830_plane_update_arm; + } else { + plane->update_noarm = i9xx_plane_update_noarm; + plane->update_arm = i9xx_plane_update_arm; + } plane->disable_arm = i9xx_plane_disable_arm; plane->get_hw_state = i9xx_plane_get_hw_state; plane->check_plane = i9xx_plane_check;