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SubjectRe: [PATCH 1/8] drm/sun4i: backend: Move line stride setup to buffer setup function
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On 13/12/2017 16:33, Maxime Ripard wrote:
> Setup the line stride in the buffer setup function, since it's tied to the
> buffer itself, and is not needed when we do not set the buffer in the
> backend.
>
> This is for example the case when using the frontend and then routing its
> output to the backend.
>
> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
> ---
> drivers/gpu/drm/sun4i/sun4i_backend.c | 14 +++++++-------
> 1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c
> index 847eecbe4d14..c99d1a7e815a 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_backend.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
> @@ -141,7 +141,6 @@ int sun4i_backend_update_layer_coord(struct sun4i_backend *backend,
> int layer, struct drm_plane *plane)
> {
> struct drm_plane_state *state = plane->state;
> - struct drm_framebuffer *fb = state->fb;
>
> DRM_DEBUG_DRIVER("Updating layer %d\n", layer);
>
> @@ -153,12 +152,6 @@ int sun4i_backend_update_layer_coord(struct sun4i_backend *backend,
> state->crtc_h));
> }
>
> - /* Set the line width */
> - DRM_DEBUG_DRIVER("Layer line width: %d bits\n", fb->pitches[0] * 8);
> - regmap_write(backend->engine.regs,
> - SUN4I_BACKEND_LAYLINEWIDTH_REG(layer),
> - fb->pitches[0] * 8);
> -
> /* Set height and width */
> DRM_DEBUG_DRIVER("Layer size W: %u H: %u\n",
> state->crtc_w, state->crtc_h);
> @@ -218,6 +211,13 @@ int sun4i_backend_update_layer_buffer(struct sun4i_backend *backend,
> u32 lo_paddr, hi_paddr;
> dma_addr_t paddr;
>
> + /* Set the line width */
> + DRM_DEBUG_DRIVER("Layer line width: %d bits\n", fb->pitches[0] * 8);
> + regmap_write(backend->engine.regs,
> + SUN4I_BACKEND_LAYLINEWIDTH_REG(layer),
> + fb->pitches[0] * 8);
> +
> +
> /* Get the start of the displayed memory */
> paddr = drm_fb_cma_get_gem_addr(fb, state, 0);
> DRM_DEBUG_DRIVER("Setting buffer address to %pad\n", &paddr);
>

Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>

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