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| author | Thierry Reding <thierry.reding@avionic-design.de> | 2012-11-28 11:38:24 +0100 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@avionic-design.de> | 2013-02-22 08:21:17 +0100 |
| commit | 23fb47404e6118eb53fb34c95ed98a3f4f822a76 (patch) | |
| tree | 15a02ad1ab7808ec37353ecd03da052f556906d5 | |
| parent | f34bc78741815d0ad07298a42101a1ee2e2bcdd2 (diff) | |
| download | linux-23fb47404e6118eb53fb34c95ed98a3f4f822a76.tar.gz | |
drm/tegra: Implement .mode_set_base()
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 <thierry.reding@avionic-design.de>
| -rw-r--r-- | drivers/gpu/drm/tegra/dc.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c index 52bf63fbf384..ceb2f52c8f7e 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, |