[PATCH v2] drm: hdlcd: Fix the calculation of the scanout start address
Liviu Dudau
Liviu.Dudau at arm.com
Wed Mar 8 08:30:25 PST 2017
The calculation of the framebuffer's start address was wrongly using
the CRTC's x and y position rather than the one of the source
framebuffer. To fix that we need to update the plane_check code to
call drm_plane_helper_check_state() to clip the src and dst coordinates.
While there so some minor cleanup of redundant freeing of
devm_alloc-ated memory.
Signed-off-by: Liviu Dudau <Liviu.Dudau at arm.com>
---
v1 was discussed here: https://lists.freedesktop.org/archives/dri-devel/2017-February/133379.html
drivers/gpu/drm/arm/hdlcd_crtc.c | 47 ++++++++++++++++++++++++++--------------
1 file changed, 31 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/arm/hdlcd_crtc.c b/drivers/gpu/drm/arm/hdlcd_crtc.c
index 20ebfb4fbdfa..c65116348281 100644
--- a/drivers/gpu/drm/arm/hdlcd_crtc.c
+++ b/drivers/gpu/drm/arm/hdlcd_crtc.c
@@ -10,6 +10,7 @@
*/
#include <drm/drmP.h>
+#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
@@ -206,16 +207,33 @@ static const struct drm_crtc_helper_funcs hdlcd_crtc_helper_funcs = {
static int hdlcd_plane_atomic_check(struct drm_plane *plane,
struct drm_plane_state *state)
{
- u32 src_w, src_h;
+ struct drm_rect clip = { 0 };
+ struct drm_crtc_state *crtc_state;
+ u32 src_h = state->src_h >> 16;
- src_w = state->src_w >> 16;
- src_h = state->src_h >> 16;
+ /* only the HDLCD_REG_FB_LINE_COUNT register has a limit */
+ if (src_h >= HDLCD_MAX_YRES) {
+ DRM_DEBUG_KMS("Invalid source width: %d\n", src_h);
+ return -EINVAL;
+ }
+
+ if (!state->fb || !state->crtc)
+ return 0;
- /* we can't do any scaling of the plane source */
- if ((src_w != state->crtc_w) || (src_h != state->crtc_h))
+ crtc_state = drm_atomic_get_existing_crtc_state(state->state,
+ state->crtc);
+ if (!crtc_state) {
+ DRM_DEBUG_KMS("Invalid crtc state\n");
return -EINVAL;
+ }
- return 0;
+ clip.x2 = crtc_state->adjusted_mode.hdisplay;
+ clip.y2 = crtc_state->adjusted_mode.vdisplay;
+
+ return drm_plane_helper_check_state(state, &clip,
+ DRM_PLANE_HELPER_NO_SCALING,
+ DRM_PLANE_HELPER_NO_SCALING,
+ false, true);
}
static void hdlcd_plane_atomic_update(struct drm_plane *plane,
@@ -224,21 +242,20 @@ static void hdlcd_plane_atomic_update(struct drm_plane *plane,
struct drm_framebuffer *fb = plane->state->fb;
struct hdlcd_drm_private *hdlcd;
struct drm_gem_cma_object *gem;
- u32 src_w, src_h, dest_w, dest_h;
+ u32 src_x, src_y, dest_h;
dma_addr_t scanout_start;
if (!fb)
return;
- src_w = plane->state->src_w >> 16;
- src_h = plane->state->src_h >> 16;
- dest_w = plane->state->crtc_w;
- dest_h = plane->state->crtc_h;
+ src_x = plane->state->src.x1 >> 16;
+ src_y = plane->state->src.y1 >> 16;
+ dest_h = drm_rect_height(&plane->state->dst);
gem = drm_fb_cma_get_gem_obj(fb, 0);
+
scanout_start = gem->paddr + fb->offsets[0] +
- plane->state->crtc_y * fb->pitches[0] +
- plane->state->crtc_x *
- fb->format->cpp[0];
+ src_y * fb->pitches[0] +
+ src_x * fb->format->cpp[0];
hdlcd = plane->dev->dev_private;
hdlcd_write(hdlcd, HDLCD_REG_FB_LINE_LENGTH, fb->pitches[0]);
@@ -285,7 +302,6 @@ static struct drm_plane *hdlcd_plane_init(struct drm_device *drm)
formats, ARRAY_SIZE(formats),
DRM_PLANE_TYPE_PRIMARY, NULL);
if (ret) {
- devm_kfree(drm->dev, plane);
return ERR_PTR(ret);
}
@@ -309,7 +325,6 @@ int hdlcd_setup_crtc(struct drm_device *drm)
&hdlcd_crtc_funcs, NULL);
if (ret) {
hdlcd_plane_destroy(primary);
- devm_kfree(drm->dev, primary);
return ret;
}
--
2.12.0
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