From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thierry Reding Subject: [PATCH v4 4/9] drm/tegra: Implement .mode_set_base() Date: Thu, 21 Feb 2013 15:35:56 +0100 Message-ID: <1361457361-13838-5-git-send-email-thierry.reding@avionic-design.de> References: <1361457361-13838-1-git-send-email-thierry.reding@avionic-design.de> Return-path: In-Reply-To: <1361457361-13838-1-git-send-email-thierry.reding-RM9K5IK7kjKj5M59NBduVrNAH6kLmebB@public.gmane.org> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Dave Airlie Cc: dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: dri-devel@lists.freedesktop.org The sequence for replacing the scanout buffer is much shorter than a full mode change operation so implementing this callback considerably speeds up cases where only a new framebuffer is to be scanned out. Signed-off-by: Thierry Reding --- Changes in v3: - split DC_CMD_STATE_CONTROL writes Changes in v4: - reset line stride to fix cases where the framebuffer size doesn't match the display mode (suggested by Mark Zhang) drivers/gpu/drm/tegra/dc.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c index 52bf63f..ceb2f52 100644 --- a/drivers/gpu/drm/tegra/dc.c +++ b/drivers/gpu/drm/tegra/dc.c @@ -134,6 +134,29 @@ static int tegra_dc_add_planes(struct drm_device *drm, struct tegra_dc *dc) return 0; } +static int tegra_dc_set_base(struct tegra_dc *dc, int x, int y, + struct drm_framebuffer *fb) +{ + struct drm_gem_cma_object *gem = drm_fb_cma_get_gem_obj(fb, 0); + unsigned long value; + + tegra_dc_writel(dc, WINDOW_A_SELECT, DC_CMD_DISPLAY_WINDOW_HEADER); + + value = fb->offsets[0] + y * fb->pitches[0] + + x * fb->bits_per_pixel / 8; + + tegra_dc_writel(dc, gem->paddr + value, DC_WINBUF_START_ADDR); + tegra_dc_writel(dc, fb->pitches[0], DC_WIN_LINE_STRIDE); + + value = GENERAL_UPDATE | WIN_A_UPDATE; + tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL); + + value = GENERAL_ACT_REQ | WIN_A_ACT_REQ; + tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL); + + return 0; +} + static const struct drm_crtc_funcs tegra_crtc_funcs = { .set_config = drm_crtc_helper_set_config, .destroy = drm_crtc_cleanup, @@ -510,6 +533,14 @@ static int tegra_crtc_mode_set(struct drm_crtc *crtc, return 0; } +static int tegra_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, + struct drm_framebuffer *old_fb) +{ + struct tegra_dc *dc = to_tegra_dc(crtc); + + return tegra_dc_set_base(dc, x, y, crtc->fb); +} + static void tegra_crtc_prepare(struct drm_crtc *crtc) { struct tegra_dc *dc = to_tegra_dc(crtc); @@ -589,6 +620,7 @@ static const struct drm_crtc_helper_funcs tegra_crtc_helper_funcs = { .disable = tegra_crtc_disable, .mode_fixup = tegra_crtc_mode_fixup, .mode_set = tegra_crtc_mode_set, + .mode_set_base = tegra_crtc_mode_set_base, .prepare = tegra_crtc_prepare, .commit = tegra_crtc_commit, .load_lut = tegra_crtc_load_lut, -- 1.8.1.2