Reviewed-by: Ander Conselvan de Oliveira <ander.conselvan.de.olive...@intel.com>
On 11/06/2014 12:26 AM, Jesse Barnes wrote:
> This allows us to calculate the full pipe config before we do any mode
> setting work.
>
> v2:
> - clarify comments about global vs. per-crtc mode set (Ander)
> - clean up unnecessary pipe_config = NULL setting (Ander)
> v3:
> - fix pipe_config handling (alloc in compute_config, free in set_mode)
> (Jesse)
> - fix arg order in set_mode (Jesse)
> - fix failure path of set_config (Ander)
>
> Signed-off-by: Jesse Barnes <jbar...@virtuousgeek.org>
> ---
> drivers/gpu/drm/i915/intel_display.c | 105
> ++++++++++++++++++++++++-----------
> 1 file changed, 74 insertions(+), 31 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index a9df85f..a3ebab8 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -10656,45 +10656,60 @@ static void update_scanline_offset(struct
> intel_crtc *crtc)
> crtc->scanline_offset = 1;
> }
>
> +static struct intel_crtc_config *
> +intel_modeset_compute_config(struct drm_crtc *crtc,
> + struct drm_display_mode *mode,
> + struct drm_framebuffer *fb,
> + unsigned *modeset_pipes,
> + unsigned *prepare_pipes,
> + unsigned *disable_pipes)
> +{
> + struct intel_crtc_config *pipe_config = NULL;
> +
> + intel_modeset_affected_pipes(crtc, modeset_pipes,
> + prepare_pipes, disable_pipes);
> +
> + if ((*modeset_pipes) == 0)
> + goto out;
> +
> + /*
> + * Note this needs changes when we start tracking multiple modes
> + * and crtcs. At that point we'll need to compute the whole config
> + * (i.e. one pipe_config for each crtc) rather than just the one
> + * for this crtc.
> + */
> + pipe_config = intel_modeset_pipe_config(crtc, fb, mode);
> + if (IS_ERR(pipe_config)) {
> + goto out;
> + }
> + intel_dump_pipe_config(to_intel_crtc(crtc), pipe_config,
> + "[modeset]");
> + to_intel_crtc(crtc)->new_config = pipe_config;
> +
> +out:
> + return pipe_config;
> +}
> +
> static int __intel_set_mode(struct drm_crtc *crtc,
> struct drm_display_mode *mode,
> - int x, int y, struct drm_framebuffer *fb)
> + int x, int y, struct drm_framebuffer *fb,
> + struct intel_crtc_config *pipe_config,
> + unsigned modeset_pipes,
> + unsigned prepare_pipes,
> + unsigned disable_pipes)
> {
> struct drm_device *dev = crtc->dev;
> struct drm_i915_private *dev_priv = dev->dev_private;
> struct drm_display_mode *saved_mode;
> - struct intel_crtc_config *pipe_config = NULL;
> struct intel_crtc *intel_crtc;
> - unsigned disable_pipes, prepare_pipes, modeset_pipes;
> int ret = 0;
>
> saved_mode = kmalloc(sizeof(*saved_mode), GFP_KERNEL);
> if (!saved_mode)
> return -ENOMEM;
>
> - intel_modeset_affected_pipes(crtc, &modeset_pipes,
> - &prepare_pipes, &disable_pipes);
> -
> *saved_mode = crtc->mode;
>
> - /* Hack: Because we don't (yet) support global modeset on multiple
> - * crtcs, we don't keep track of the new mode for more than one crtc.
> - * Hence simply check whether any bit is set in modeset_pipes in all the
> - * pieces of code that are not yet converted to deal with mutliple crtcs
> - * changing their mode at the same time. */
> - if (modeset_pipes) {
> - pipe_config = intel_modeset_pipe_config(crtc, fb, mode);
> - if (IS_ERR(pipe_config)) {
> - ret = PTR_ERR(pipe_config);
> - pipe_config = NULL;
> -
> - goto out;
> - }
> - intel_dump_pipe_config(to_intel_crtc(crtc), pipe_config,
> - "[modeset]");
> - to_intel_crtc(crtc)->new_config = pipe_config;
> - }
> -
> /*
> * See if the config requires any additional preparation, e.g.
> * to adjust global state with pipes off. We need to do this
> @@ -10719,6 +10734,10 @@ static int __intel_set_mode(struct drm_crtc *crtc,
>
> /* crtc->mode is already used by the ->mode_set callbacks, hence we need
> * to set it here already despite that we pass it down the callchain.
> + *
> + * Note we'll need to fix this up when we start tracking multiple
> + * pipes; here we assume a single modeset_pipe and only track the
> + * single crtc and mode.
> */
> if (modeset_pipes) {
> crtc->mode = *mode;
> @@ -10787,19 +10806,23 @@ done:
> if (ret && crtc->enabled)
> crtc->mode = *saved_mode;
>
> -out:
> kfree(pipe_config);
> kfree(saved_mode);
> return ret;
> }
>
> -static int intel_set_mode(struct drm_crtc *crtc,
> - struct drm_display_mode *mode,
> - int x, int y, struct drm_framebuffer *fb)
> +static int intel_set_mode_pipes(struct drm_crtc *crtc,
> + struct drm_display_mode *mode,
> + int x, int y, struct drm_framebuffer *fb,
> + struct intel_crtc_config *pipe_config,
> + unsigned modeset_pipes,
> + unsigned prepare_pipes,
> + unsigned disable_pipes)
> {
> int ret;
>
> - ret = __intel_set_mode(crtc, mode, x, y, fb);
> + ret = __intel_set_mode(crtc, mode, x, y, fb, pipe_config, modeset_pipes,
> + prepare_pipes, disable_pipes);
>
> if (ret == 0)
> intel_modeset_check_state(crtc->dev);
> @@ -10807,6 +10830,26 @@ static int intel_set_mode(struct drm_crtc *crtc,
> return ret;
> }
>
> +static int intel_set_mode(struct drm_crtc *crtc,
> + struct drm_display_mode *mode,
> + int x, int y, struct drm_framebuffer *fb)
> +{
> + struct intel_crtc_config *pipe_config;
> + unsigned modeset_pipes, prepare_pipes, disable_pipes;
> +
> + pipe_config = intel_modeset_compute_config(crtc, mode, fb,
> + &modeset_pipes,
> + &prepare_pipes,
> + &disable_pipes);
> +
> + if (IS_ERR(pipe_config))
> + return PTR_ERR(pipe_config);
> +
> + return intel_set_mode_pipes(crtc, mode, x, y, fb, pipe_config,
> + modeset_pipes, prepare_pipes,
> + disable_pipes);
> +}
> +
> void intel_crtc_restore_mode(struct drm_crtc *crtc)
> {
> intel_set_mode(crtc, &crtc->mode, crtc->x, crtc->y, crtc->primary->fb);
> @@ -13156,8 +13199,8 @@ void intel_modeset_setup_hw_state(struct drm_device
> *dev,
> struct drm_crtc *crtc =
> dev_priv->pipe_to_crtc_mapping[pipe];
>
> - __intel_set_mode(crtc, &crtc->mode, crtc->x, crtc->y,
> - crtc->primary->fb);
> + intel_set_mode(crtc, &crtc->mode, crtc->x, crtc->y,
> + crtc->primary->fb);
> }
> } else {
> intel_modeset_update_staged_output_state(dev);
>
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