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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, Hsiao-chien: On Thu, 2024-02-15 at 18:11 +0800, Hsiao Chien Sung wrote: > Support "Pre-multiplied" and "None" blend mode on MediaTek's chips. > Before this patch, only the "Coverage" mode is supported. > > Please refer to the description of the commit > "drm/mediatek: Support alpha blending in display driver" > for more information. Separate this patch into pre-multiplied patch and none patch. Regards, CK > > Signed-off-by: Hsiao Chien Sung > --- > drivers/gpu/drm/mediatek/mtk_ethdr.c | 26 +++++++++++++++++++------- > 1 file changed, 19 insertions(+), 7 deletions(-) > > diff --git a/drivers/gpu/drm/mediatek/mtk_ethdr.c > b/drivers/gpu/drm/mediatek/mtk_ethdr.c > index 69872b77922eb..e95331c068151 100644 > --- a/drivers/gpu/drm/mediatek/mtk_ethdr.c > +++ b/drivers/gpu/drm/mediatek/mtk_ethdr.c > @@ -5,6 +5,7 @@ > > #include > #include > +#include > #include > #include > #include > @@ -35,6 +36,7 @@ > #define MIX_SRC_L0_EN BIT(0) > #define MIX_L_SRC_CON(n) (0x28 + 0x18 * (n)) > #define NON_PREMULTI_SOURCE (2 << 12) > +#define PREMULTI_SOURCE (3 << 12) > #define MIX_L_SRC_SIZE(n) (0x30 + 0x18 * (n)) > #define MIX_L_SRC_OFFSET(n) (0x34 + 0x18 * (n)) > #define MIX_FUNC_DCM0 0x120 > @@ -153,7 +155,8 @@ void mtk_ethdr_layer_config(struct device *dev, > unsigned int idx, > struct mtk_plane_pending_state *pending = &state->pending; > unsigned int offset = (pending->x & 1) << 31 | pending->y << 16 > | pending->x; > unsigned int align_width = ALIGN_DOWN(pending->width, 2); > - unsigned int alpha_con = 0; > + unsigned int mix_con = NON_PREMULTI_SOURCE; > + bool replace_src_a = false; > > dev_dbg(dev, "%s+ idx:%d", __func__, idx); > > @@ -170,19 +173,28 @@ void mtk_ethdr_layer_config(struct device *dev, > unsigned int idx, > return; > } > > - if (state->base.fb && state->base.fb->format->has_alpha) > - alpha_con = MIXER_ALPHA_AEN | MIXER_ALPHA; > + mix_con |= MIXER_ALPHA_AEN | (state->base.alpha & MIXER_ALPHA); > > - mtk_mmsys_mixer_in_config(priv->mmsys_dev, idx + 1, alpha_con ? > false : true, > - DEFAULT_9BIT_ALPHA, > + if (state->base.pixel_blend_mode != DRM_MODE_BLEND_COVERAGE) > + mix_con |= PREMULTI_SOURCE; > + > + if (state->base.pixel_blend_mode == DRM_MODE_BLEND_PIXEL_NONE > || > + (state->base.fb && !state->base.fb->format->has_alpha)) { > + /* > + * Mixer doesn't support CONST_BLD mode, > + * use a trick to make the output equivalent > + */ > + replace_src_a = true; > + } > + > + mtk_mmsys_mixer_in_config(priv->mmsys_dev, idx + 1, > replace_src_a, MIXER_ALPHA, > pending->x & 1 ? > MIXER_INX_MODE_EVEN_EXTEND : > MIXER_INX_MODE_BYPASS, align_width / > 2 - 1, cmdq_pkt); > > mtk_ddp_write(cmdq_pkt, pending->height << 16 | align_width, > &mixer->cmdq_base, > mixer->regs, MIX_L_SRC_SIZE(idx)); > mtk_ddp_write(cmdq_pkt, offset, &mixer->cmdq_base, mixer->regs, > MIX_L_SRC_OFFSET(idx)); > - mtk_ddp_write_mask(cmdq_pkt, alpha_con, &mixer->cmdq_base, > mixer->regs, MIX_L_SRC_CON(idx), > - 0x1ff); > + mtk_ddp_write(cmdq_pkt, mix_con, &mixer->cmdq_base, mixer- > >regs, MIX_L_SRC_CON(idx)); > mtk_ddp_write_mask(cmdq_pkt, BIT(idx), &mixer->cmdq_base, > mixer->regs, MIX_SRC_CON, > BIT(idx)); > } _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel