On Fri, May 04, 2018 at 03:08:42AM +0300, Dmitry Osipenko wrote:
Currently resized plane produces a "pixelated" image which doesn't look nice, especially in a case of a video overlay. Enable scaling filters that significantly improve image quality of a scaled overlay.
Signed-off-by: Dmitry Osipenko digetx@gmail.com
drivers/gpu/drm/tegra/dc.c | 51 ++++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/tegra/dc.h | 7 ++++++ 2 files changed, 58 insertions(+)
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c index 9f83a65b5ea9..2e81142281c3 100644 --- a/drivers/gpu/drm/tegra/dc.c +++ b/drivers/gpu/drm/tegra/dc.c @@ -361,6 +361,47 @@ static void tegra_dc_setup_window(struct tegra_plane *plane, if (window->bottom_up) value |= V_DIRECTION;
- if (!(dc->soc->has_win_a_without_filter && plane->index == 0) &&
!(window->src.w == window->dst.w)) {
I don't know about you, but I get dizzy trying to parse the above. How about we move this into helpers:
static bool tegra_plane_has_horizontal_filter(struct tegra_plane *plane) { struct tegra_dc *dc = plane->dc;
/* this function should never be called on inactive planes */ if (WARN_ON(!dc)) return false;
if (plane->index == 0 && dc->soc->has_win_a_without_filter) return false;
return true; }
Then the above becomes:
bool scale_x = window->dst.w != window->src.w;
if (scale_x && tegra_plane_has_horizontal_filter(plane)) {
/** Enable horizontal 6-tap filter and set filtering* coefficients to the default values defined in TRM.*/tegra_plane_writel(plane, 0x00008000, DC_WIN_H_FILTER_P(0));tegra_plane_writel(plane, 0x3e087ce1, DC_WIN_H_FILTER_P(1));tegra_plane_writel(plane, 0x3b117ac1, DC_WIN_H_FILTER_P(2));tegra_plane_writel(plane, 0x591b73aa, DC_WIN_H_FILTER_P(3));tegra_plane_writel(plane, 0x57256d9a, DC_WIN_H_FILTER_P(4));tegra_plane_writel(plane, 0x552f668b, DC_WIN_H_FILTER_P(5));tegra_plane_writel(plane, 0x73385e8b, DC_WIN_H_FILTER_P(6));tegra_plane_writel(plane, 0x72435583, DC_WIN_H_FILTER_P(7));tegra_plane_writel(plane, 0x714c4c8b, DC_WIN_H_FILTER_P(8));tegra_plane_writel(plane, 0x70554393, DC_WIN_H_FILTER_P(9));tegra_plane_writel(plane, 0x715e389b, DC_WIN_H_FILTER_P(10));tegra_plane_writel(plane, 0x71662faa, DC_WIN_H_FILTER_P(11));tegra_plane_writel(plane, 0x536d25ba, DC_WIN_H_FILTER_P(12));tegra_plane_writel(plane, 0x55731bca, DC_WIN_H_FILTER_P(13));tegra_plane_writel(plane, 0x387a11d9, DC_WIN_H_FILTER_P(14));tegra_plane_writel(plane, 0x3c7c08f1, DC_WIN_H_FILTER_P(15));value |= H_FILTER;- }
- if (!(dc->soc->has_win_a_without_filter && plane->index == 0) &&
!(dc->soc->has_win_c_without_vert_filter && plane->index == 2) &&!(window->src.h == window->dst.h)) {
static bool tegra_plane_has_vertical_filter(struct tegra_plane *plane) { struct tegra_dc *dc = plane->dc;
/* this function should never be called on inactive planes */ if (WARN_ON(!dc)) return false;
if (plane->index == 0 && dc->soc->has_win_a_without_filter) return false;
if (plane->index == 2 && dc->soc->has_win_c_without_vert_filter) return false;
return true; }
And the above becomes:
bool scale_y = window->dst.h != window->src.h;
if (scale_y && tegra_plane_has_vertical_filter(plane)) {
Thierry