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Commit 270b77a0 authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

Merge tag 'drm-fixes-2018-10-20-1' of git://anongit.freedesktop.org/drm/drm 

Dave writes:
  "drm fixes for 4.19 final (part 2)

   Looked like two stragglers snuck in, one very urgent the pageflipping
   was missing a reference that could result in a GPF on non-i915
   drivers, the other is an overflow in the sun4i dotclock calcs
   resulting in a mode not getting set."

* tag 'drm-fixes-2018-10-20-1' of git://anongit.freedesktop.org/drm/drm:
  drm/sun4i: Fix an ulong overflow in the dotclock driver
  drm: Get ref on CRTC commit object when waiting for flip_done
parents 6b5201c2 fe7acd1e

drivers/gpu/drm/drm_atomic.c

+5 −0
Original line number Diff line number Diff line
@@ -174,6 +174,11 @@ void drm_atomic_state_default_clear(struct drm_atomic_state *state) 
		state->crtcs[i].state = NULL;

		state->crtcs[i].old_state = NULL;

		state->crtcs[i].new_state = NULL;



		if (state->crtcs[i].commit) {

			drm_crtc_commit_put(state->crtcs[i].commit);

			state->crtcs[i].commit = NULL;

		}

	}



	for (i = 0; i < config->num_total_plane; i++) {

drivers/gpu/drm/drm_atomic_helper.c

+8 −4
Original line number Diff line number Diff line
@@ -1408,15 +1408,16 @@ EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); 
void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev,

					  struct drm_atomic_state *old_state)

{

	struct drm_crtc_state *new_crtc_state;

	struct drm_crtc *crtc;

	int i;



	for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {

		struct drm_crtc_commit *commit = new_crtc_state->commit;

	for (i = 0; i < dev->mode_config.num_crtc; i++) {

		struct drm_crtc_commit *commit = old_state->crtcs[i].commit;

		int ret;



		if (!commit)

		crtc = old_state->crtcs[i].ptr;



		if (!crtc || !commit)

			continue;



		ret = wait_for_completion_timeout(&commit->flip_done, 10 * HZ);
@@ -1934,6 +1935,9 @@ int drm_atomic_helper_setup_commit(struct drm_atomic_state *state, 
		drm_crtc_commit_get(commit);



		commit->abort_completion = true;



		state->crtcs[i].commit = commit;

		drm_crtc_commit_get(commit);

	}



	for_each_oldnew_connector_in_state(state, conn, old_conn_state, new_conn_state, i) {

drivers/gpu/drm/sun4i/sun4i_dotclock.c

+11 −1
Original line number Diff line number Diff line
@@ -81,9 +81,19 @@ static long sun4i_dclk_round_rate(struct clk_hw *hw, unsigned long rate, 
	int i;



	for (i = tcon->dclk_min_div; i <= tcon->dclk_max_div; i++) {

		unsigned long ideal = rate * i;

		u64 ideal = (u64)rate * i;

		unsigned long rounded;



		/*

		 * ideal has overflowed the max value that can be stored in an

		 * unsigned long, and every clk operation we might do on a

		 * truncated u64 value will give us incorrect results.

		 * Let's just stop there since bigger dividers will result in

		 * the same overflow issue.

		 */

		if (ideal > ULONG_MAX)

			goto out;



		rounded = clk_hw_round_rate(clk_hw_get_parent(hw),

					    ideal);

include/drm/drm_atomic.h

+11 −0
Original line number Diff line number Diff line
@@ -153,6 +153,17 @@ struct __drm_planes_state { 
struct __drm_crtcs_state {

	struct drm_crtc *ptr;

	struct drm_crtc_state *state, *old_state, *new_state;



	/**

	 * @commit:

	 *

	 * A reference to the CRTC commit object that is kept for use by

	 * drm_atomic_helper_wait_for_flip_done() after

	 * drm_atomic_helper_commit_hw_done() is called. This ensures that a

	 * concurrent commit won't free a commit object that is still in use.

	 */

	struct drm_crtc_commit *commit;



	s32 __user *out_fence_ptr;

	u64 last_vblank_count;

};