2018-07-27 08:40:08

by Satendra Singh Thakur

Subject: [PATCH] drm/kms/atomic: Used existing func for checking fb geometry

1.In the func drm_atomic_plane_check, the fb geometry checking code
can be replaced by func drm_framebuffer_check_src_coords, this will
remove several redundant lines of code.
2. Currently, in the func drm_atomic_plane_check;
there are 3 if statements in the beginning with total 5 conditions.
these conditions are
crtc is NULL but fb is non-NULL
if (state->crtc && !state->fb)
crtc is non-NULL but fb is NULL
if (state->fb && !state->crtc)
crtc is NULL (and fb is also NULL)
if (!state->crtc)

The same code can be re-written using 2 if statements and 4 conditions.
first we check whether crtc and fb both are NULL
if (!state->crtc && !state->fb)
then we check either crtc or fb is NULL
if (!state->crtc || !state->fb)

Signed-off-by: Satendra Singh Thakur <[email protected]>
---
drivers/gpu/drm/drm_atomic.c | 37 +++++++++----------------------------
1 file changed, 9 insertions(+), 28 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 895741e..1cddab8 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -909,22 +909,16 @@ plane_switching_crtc(struct drm_atomic_state *state,
static int drm_atomic_plane_check(struct drm_plane *plane,
struct drm_plane_state *state)
{
- unsigned int fb_width, fb_height;
int ret;

- /* either *both* CRTC and FB must be set, or neither */
- if (state->crtc && !state->fb) {
- DRM_DEBUG_ATOMIC("CRTC set but no FB\n");
- return -EINVAL;
- } else if (state->fb && !state->crtc) {
- DRM_DEBUG_ATOMIC("FB set but no CRTC\n");
- return -EINVAL;
- }
-
/* if disabled, we don't care about the rest of the state: */
- if (!state->crtc)
+ if (!state->crtc && !state->fb)
return 0;
-
+ /* both CRTC and FB must be set*/
+ if (!state->crtc || !state->fb) {
+ DRM_DEBUG_ATOMIC("Either no CRTC or no FB\n");
+ return -EINVAL;
+ }
/* Check whether this plane is usable on this CRTC */
if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) {
DRM_DEBUG_ATOMIC("Invalid crtc for plane\n");
@@ -954,24 +948,11 @@ static int drm_atomic_plane_check(struct drm_plane *plane,
return -ERANGE;
}

- fb_width = state->fb->width << 16;
- fb_height = state->fb->height << 16;
-
/* Make sure source coordinates are inside the fb. */
- if (state->src_w > fb_width ||
- state->src_x > fb_width - state->src_w ||
- state->src_h > fb_height ||
- state->src_y > fb_height - state->src_h) {
- DRM_DEBUG_ATOMIC("Invalid source coordinates "
- "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
- state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10,
- state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10,
- state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10,
- state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10,
- state->fb->width, state->fb->height);
+ ret = drm_framebuffer_check_src_coords(state->src_x, state->src_y,
+ state->src_w, state->src_h, state->fb);
+ if (ret)
return -ENOSPC;
- }
-
if (plane_switching_crtc(state->state, plane, state)) {
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
plane->base.id, plane->name);
--
2.7.4

2018-07-27 09:53:18

by Maarten Lankhorst

Subject: Re: [PATCH] drm/kms/atomic: Used existing func for checking fb geometry

Op 27-07-18 om 10:38 schreef Satendra Singh Thakur:
> 1.In the func drm_atomic_plane_check, the fb geometry checking code
> can be replaced by func drm_framebuffer_check_src_coords, this will
> remove several redundant lines of code.
> 2. Currently, in the func drm_atomic_plane_check;
> there are 3 if statements in the beginning with total 5 conditions.
> these conditions are
> crtc is NULL but fb is non-NULL
> if (state->crtc && !state->fb)
> crtc is non-NULL but fb is NULL
> if (state->fb && !state->crtc)
> crtc is NULL (and fb is also NULL)
> if (!state->crtc)
>
> The same code can be re-written using 2 if statements and 4 conditions.
> first we check whether crtc and fb both are NULL
> if (!state->crtc && !state->fb)
> then we check either crtc or fb is NULL
> if (!state->crtc || !state->fb)
>
> Signed-off-by: Satendra Singh Thakur <[email protected]>
> ---
> drivers/gpu/drm/drm_atomic.c | 37 +++++++++----------------------------
> 1 file changed, 9 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> index 895741e..1cddab8 100644
> --- a/drivers/gpu/drm/drm_atomic.c
> +++ b/drivers/gpu/drm/drm_atomic.c
> @@ -909,22 +909,16 @@ plane_switching_crtc(struct drm_atomic_state *state,
> static int drm_atomic_plane_check(struct drm_plane *plane,
> struct drm_plane_state *state)
> {
> - unsigned int fb_width, fb_height;
> int ret;
>
> - /* either *both* CRTC and FB must be set, or neither */
> - if (state->crtc && !state->fb) {
> - DRM_DEBUG_ATOMIC("CRTC set but no FB\n");
> - return -EINVAL;
> - } else if (state->fb && !state->crtc) {
> - DRM_DEBUG_ATOMIC("FB set but no CRTC\n");
> - return -EINVAL;
> - }
> -
> /* if disabled, we don't care about the rest of the state: */
> - if (!state->crtc)
> + if (!state->crtc && !state->fb)
> return 0;
> -
> + /* both CRTC and FB must be set*/
> + if (!state->crtc || !state->fb) {
> + DRM_DEBUG_ATOMIC("Either no CRTC or no FB\n");
> + return -EINVAL;
> + }
> /* Check whether this plane is usable on this CRTC */
> if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) {
> DRM_DEBUG_ATOMIC("Invalid crtc for plane\n");
This should be a separate patch?
> @@ -954,24 +948,11 @@ static int drm_atomic_plane_check(struct drm_plane *plane,
> return -ERANGE;
> }
>
> - fb_width = state->fb->width << 16;
> - fb_height = state->fb->height << 16;
> -
> /* Make sure source coordinates are inside the fb. */
> - if (state->src_w > fb_width ||
> - state->src_x > fb_width - state->src_w ||
> - state->src_h > fb_height ||
> - state->src_y > fb_height - state->src_h) {
> - DRM_DEBUG_ATOMIC("Invalid source coordinates "
> - "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
> - state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10,
> - state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10,
> - state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10,
> - state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10,
> - state->fb->width, state->fb->height);
> + ret = drm_framebuffer_check_src_coords(state->src_x, state->src_y,
> + state->src_w, state->src_h, state->fb);
> + if (ret)
> return -ENOSPC;
Change this to return ret, no need to swallow errors. :)
> - }
> -
> if (plane_switching_crtc(state->state, plane, state)) {
> DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
> plane->base.id, plane->name);

2018-07-27 11:06:54

by Satendra Singh Thakur

Subject: [PATCH v1] drm/kms/atomic: Improving func drm_atomic_plane_check

Currently, in the func drm_atomic_plane_check;
there are 3 if statements in the beginning with total 5 conditions.
these conditions are
crtc is NULL but fb is non-NULL
if (state->crtc && !state->fb)
crtc is non-NULL but fb is NULL
if (state->fb && !state->crtc)
crtc is NULL (and fb is also NULL)
if (!state->crtc)

The same code can be re-written using 2 if statements and 4 conditions.
first we check whether crtc and fb both are NULL
if (!state->crtc && !state->fb)
then we check either crtc or fb is NULL
if (!state->crtc || !state->fb)

Signed-off-by: Satendra Singh Thakur <[email protected]>
---
v1: Hi Mr Maarten, Thanks for the comments.
I have splitted them into two patches.

drivers/gpu/drm/drm_atomic.c | 17 +++++++----------
1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 895741e..0415bbf 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -912,18 +912,15 @@ static int drm_atomic_plane_check(struct drm_plane *plane,
unsigned int fb_width, fb_height;
int ret;

- /* either *both* CRTC and FB must be set, or neither */
- if (state->crtc && !state->fb) {
- DRM_DEBUG_ATOMIC("CRTC set but no FB\n");
- return -EINVAL;
- } else if (state->fb && !state->crtc) {
- DRM_DEBUG_ATOMIC("FB set but no CRTC\n");
- return -EINVAL;
- }
-
/* if disabled, we don't care about the rest of the state: */
- if (!state->crtc)
+ if (!state->crtc && !state->fb)
return 0;
+ /* both CRTC and FB must be set*/
+ if (!state->crtc || !state->fb) {
+ DRM_DEBUG_ATOMIC("Either invalid CRTC [%p] or invalid FB [%p]\n",
+ state->crtc, state->fb);
+ return -EINVAL;
+ }

/* Check whether this plane is usable on this CRTC */
if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) {
--
2.7.4

2018-07-27 11:13:07

by Satendra Singh Thakur

Subject: [PATCH v1] drm/kms/atomic: Using existing func for checking framebuffer dimensions

In the func drm_atomic_plane_check, the fb geometry checking code
can be replaced by func drm_framebuffer_check_src_coords, this will
remove several redundant lines of code.

Signed-off-by: Satendra Singh Thakur <[email protected]>
---
v1: Hi Mr Maarten, Thanks for the comments.
I have splitted them into two patches.

drivers/gpu/drm/drm_atomic.c | 22 ++++------------------
1 file changed, 4 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 895741e..953bd2a 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -909,7 +909,6 @@ plane_switching_crtc(struct drm_atomic_state *state,
static int drm_atomic_plane_check(struct drm_plane *plane,
struct drm_plane_state *state)
{
- unsigned int fb_width, fb_height;
int ret;

/* either *both* CRTC and FB must be set, or neither */
@@ -954,24 +953,11 @@ static int drm_atomic_plane_check(struct drm_plane *plane,
return -ERANGE;
}

- fb_width = state->fb->width << 16;
- fb_height = state->fb->height << 16;
-
/* Make sure source coordinates are inside the fb. */
- if (state->src_w > fb_width ||
- state->src_x > fb_width - state->src_w ||
- state->src_h > fb_height ||
- state->src_y > fb_height - state->src_h) {
- DRM_DEBUG_ATOMIC("Invalid source coordinates "
- "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
- state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10,
- state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10,
- state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10,
- state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10,
- state->fb->width, state->fb->height);
- return -ENOSPC;
- }
-
+ ret = drm_framebuffer_check_src_coords(state->src_x, state->src_y,
+ state->src_w, state->src_h, state->fb);
+ if (ret)
+ return ret;
if (plane_switching_crtc(state->state, plane, state)) {
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
plane->base.id, plane->name);
--
2.7.4