drm/sti: fallback for GDP scaling (a5b9a713) · Commits · 戴 / test

drivers/gpu/drm/sti/sti_gdp.c

+31 −5

Original line number	Diff line number	Diff line
		@@ -361,6 +361,31 @@ static void sti_gdp_init(struct sti_gdp *gdp)
		}
		}

		/**
		* sti_gdp_get_dst
		* @dev: device
		* @dst: requested destination size
		* @src: source size
		*
		* Return the cropped / clamped destination size
		*
		* RETURNS:
		* cropped / clamped destination size
		*/
		static int sti_gdp_get_dst(struct device *dev, int dst, int src)
		{
		if (dst == src)
		return dst;

		if (dst < src) {
		dev_dbg(dev, "WARNING: GDP scale not supported, will crop\n");
		return dst;
		}

		dev_dbg(dev, "WARNING: GDP scale not supported, will clamp\n");
		return src;
		}

		static void sti_gdp_atomic_update(struct drm_plane *drm_plane,
		struct drm_plane_state *oldstate)
		{
		@@ -399,8 +424,8 @@ static void sti_gdp_atomic_update(struct drm_plane *drm_plane,
		/* src_x are in 16.16 format */
		src_x = state->src_x >> 16;
		src_y = state->src_y >> 16;
		src_w = state->src_w >> 16;
		src_h = state->src_h >> 16;
		src_w = clamp_val(state->src_w >> 16, 0, GAM_GDP_SIZE_MAX);
		src_h = clamp_val(state->src_h >> 16, 0, GAM_GDP_SIZE_MAX);

		DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n",
		crtc->base.id, sti_mixer_to_str(mixer),
		@@ -448,10 +473,11 @@ static void sti_gdp_atomic_update(struct drm_plane *drm_plane,

		/* input parameters */
		top_field->gam_gdp_pmp = fb->pitches[0];
		top_field->gam_gdp_size = clamp_val(src_h, 0, GAM_GDP_SIZE_MAX) << 16 \|
		clamp_val(src_w, 0, GAM_GDP_SIZE_MAX);
		top_field->gam_gdp_size = src_h << 16 \| src_w;

		/* output parameters */
		/* output parameters (clamped / cropped) */
		dst_w = sti_gdp_get_dst(gdp->dev, dst_w, src_w);
		dst_h = sti_gdp_get_dst(gdp->dev, dst_h, src_h);
		ydo = sti_vtg_get_line_number(*mode, dst_y);
		yds = sti_vtg_get_line_number(*mode, dst_y + dst_h - 1);
		xdo = sti_vtg_get_pixel_number(*mode, dst_x);

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