forked from Minki/linux
5ed8cf5b8e
The DMA FIFO threshold registers and burst size registers have changed for OMAP4. The current code only handles OMAP2/3 case, and so the values are a bit off for OMAP4. A summary of the differences between OMAP2/3 and OMAP4: Burst size: OMAP2/3: 4 x 32 bits / 8 x 32 bits / 16 x 32 bits OMAP4: 2 x 128 bits / 4 x 128 bits / 8 x 128 bits Threshold size: OMAP2/3: in bytes (8 bit units) OMAP4: in 128bit units This patch fixes the issue by creating two new helper functions in dss_features: dss_feat_get_buffer_size_unit() and dss_feat_get_burst_size_unit(). These return (in bytes) the unit size for threshold registers and unit size for burst size register, respectively, and are used to calculate correct values. For the threshold size the usage is straightforward. However, the burst size register has different multipliers for OMAP2/3 and OMAP4. This patch solves the problem by defining the multipliers for the burst size as 2x, 4x and 8x, which fit fine for the OMAP4 burst size definition (i.e. burst size unit for OMAP4 is 128bits), but requires a slight twist on OMAP2/3 by defining the burst size unit as 64bit. As the driver in practice always uses the maximum burst size, and no use case currently exists where we would want to use a smaller burst size, this patch changes the driver to hardcode the burst size when initializing DISPC. This makes the threshold configuration code somewhat simpler. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/*
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* linux/drivers/video/omap2/dss/dss_features.h
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*
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* Copyright (C) 2010 Texas Instruments
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* Author: Archit Taneja <archit@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __OMAP2_DSS_FEATURES_H
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#define __OMAP2_DSS_FEATURES_H
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#define MAX_DSS_MANAGERS 3
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#define MAX_DSS_OVERLAYS 3
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#define MAX_DSS_LCD_MANAGERS 2
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#define MAX_NUM_DSI 2
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/* DSS has feature id */
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enum dss_feat_id {
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FEAT_GLOBAL_ALPHA = 1 << 0,
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FEAT_GLOBAL_ALPHA_VID1 = 1 << 1,
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FEAT_PRE_MULT_ALPHA = 1 << 2,
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FEAT_LCDENABLEPOL = 1 << 3,
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FEAT_LCDENABLESIGNAL = 1 << 4,
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FEAT_PCKFREEENABLE = 1 << 5,
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FEAT_FUNCGATED = 1 << 6,
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FEAT_MGR_LCD2 = 1 << 7,
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FEAT_LINEBUFFERSPLIT = 1 << 8,
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FEAT_ROWREPEATENABLE = 1 << 9,
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FEAT_RESIZECONF = 1 << 10,
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/* Independent core clk divider */
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FEAT_CORE_CLK_DIV = 1 << 11,
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FEAT_LCD_CLK_SRC = 1 << 12,
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/* DSI-PLL power command 0x3 is not working */
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FEAT_DSI_PLL_PWR_BUG = 1 << 13,
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FEAT_DSI_PLL_FREQSEL = 1 << 14,
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FEAT_DSI_DCS_CMD_CONFIG_VC = 1 << 15,
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FEAT_DSI_VC_OCP_WIDTH = 1 << 16,
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FEAT_DSI_REVERSE_TXCLKESC = 1 << 17,
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FEAT_DSI_GNQ = 1 << 18,
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FEAT_HDMI_CTS_SWMODE = 1 << 19,
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FEAT_HANDLE_UV_SEPARATE = 1 << 20,
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FEAT_ATTR2 = 1 << 21,
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FEAT_VENC_REQUIRES_TV_DAC_CLK = 1 << 22,
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FEAT_CPR = 1 << 23,
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FEAT_PRELOAD = 1 << 24,
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FEAT_FIR_COEF_V = 1 << 25,
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};
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/* DSS register field id */
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enum dss_feat_reg_field {
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FEAT_REG_FIRHINC,
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FEAT_REG_FIRVINC,
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FEAT_REG_FIFOHIGHTHRESHOLD,
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FEAT_REG_FIFOLOWTHRESHOLD,
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FEAT_REG_FIFOSIZE,
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FEAT_REG_HORIZONTALACCU,
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FEAT_REG_VERTICALACCU,
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FEAT_REG_DISPC_CLK_SWITCH,
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FEAT_REG_DSIPLL_REGN,
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FEAT_REG_DSIPLL_REGM,
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FEAT_REG_DSIPLL_REGM_DISPC,
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FEAT_REG_DSIPLL_REGM_DSI,
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};
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enum dss_range_param {
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FEAT_PARAM_DSS_FCK,
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FEAT_PARAM_DSIPLL_REGN,
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FEAT_PARAM_DSIPLL_REGM,
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FEAT_PARAM_DSIPLL_REGM_DISPC,
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FEAT_PARAM_DSIPLL_REGM_DSI,
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FEAT_PARAM_DSIPLL_FINT,
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FEAT_PARAM_DSIPLL_LPDIV,
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};
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/* DSS Feature Functions */
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int dss_feat_get_num_mgrs(void);
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int dss_feat_get_num_ovls(void);
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unsigned long dss_feat_get_param_min(enum dss_range_param param);
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unsigned long dss_feat_get_param_max(enum dss_range_param param);
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enum omap_display_type dss_feat_get_supported_displays(enum omap_channel channel);
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enum omap_color_mode dss_feat_get_supported_color_modes(enum omap_plane plane);
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bool dss_feat_color_mode_supported(enum omap_plane plane,
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enum omap_color_mode color_mode);
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const char *dss_feat_get_clk_source_name(enum omap_dss_clk_source id);
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u32 dss_feat_get_buffer_size_unit(void); /* in bytes */
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u32 dss_feat_get_burst_size_unit(void); /* in bytes */
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bool dss_has_feature(enum dss_feat_id id);
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void dss_feat_get_reg_field(enum dss_feat_reg_field id, u8 *start, u8 *end);
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void dss_features_init(void);
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#endif
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