[PATCH 4.4 084/118] drm: atmel-hlcdc: Fix vertical scaling
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2016-09-22 18:52:54
Also in:
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4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jan Leupold <redacted>
commit d31ed3f05763644840c654a384eaefa94c097ba2 upstream.
The code is applying the same scaling for the X and Y components,
thus making the scaling feature only functional when both components
have the same scaling factor.
Do the s/_w/_h/ replacement where appropriate to fix vertical scaling.
Signed-off-by: Jan Leupold <redacted>
Fixes: 1a396789f65a2 ("drm: add Atmel HLCDC Display Controller support")
Signed-off-by: Boris Brezillon <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c@@ -316,19 +316,19 @@ atmel_hlcdc_plane_update_pos_and_size(st u32 *coeff_tab = heo_upscaling_ycoef; u32 max_memsize; - if (state->crtc_w < state->src_w) + if (state->crtc_h < state->src_h) coeff_tab = heo_downscaling_ycoef; for (i = 0; i < ARRAY_SIZE(heo_upscaling_ycoef); i++) atmel_hlcdc_layer_update_cfg(&plane->layer, 33 + i, 0xffffffff, coeff_tab[i]); - factor = ((8 * 256 * state->src_w) - (256 * 4)) / - state->crtc_w; + factor = ((8 * 256 * state->src_h) - (256 * 4)) / + state->crtc_h; factor++; - max_memsize = ((factor * state->crtc_w) + (256 * 4)) / + max_memsize = ((factor * state->crtc_h) + (256 * 4)) / 2048; - if (max_memsize > state->src_w) + if (max_memsize > state->src_h) factor--; factor_reg |= (factor << 16) | 0x80000000; }